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A Novel Non-Planar Cell Structure for Flash Memory
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作者 欧文 李明 钱鹤 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2002年第11期1158-1161,共4页
Proposed herein is a novel non planar cell structure for flash memory which has been fabricated to achieve high programming speed with low operating voltage.This memory cell preserves a simple stacked gate structure ... Proposed herein is a novel non planar cell structure for flash memory which has been fabricated to achieve high programming speed with low operating voltage.This memory cell preserves a simple stacked gate structure which only requires an additional masking step to form the novel structure in the channel.For the cell of the 1 2μm gate length,the programming speed of 43μs under the measuring condition of V g=15V, V d=5V,and the erasing time of 24ms under V g=-5V, V s=8V are obtained.The programming speed is faster than that of the conventional planar cell structure.This superior programming speed makes it suitable for high speed application. 展开更多
关键词 flash memory non planar structure programming speed
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Structure of Sn Doped AB_5 Non-Stoichiometric Hydrogen-Absorbing Alloys-Ⅰ
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作者 王志兴 李新海 +3 位作者 陈启元 郭炳昆 彭文杰 郭华军 《Journal of Rare Earths》 SCIE EI CAS CSCD 2000年第4期285-288,共4页
Five non stoichiometric alloys, i.e., LaNi 5.15 , La(NiSn) 5.14 , La(NiSnCo) 5.12 , La(NiSnMn) 5.12 , and La(NiSnCoMnAl) 5.10 were studied. It is shown that the second minor phase does not exist ... Five non stoichiometric alloys, i.e., LaNi 5.15 , La(NiSn) 5.14 , La(NiSnCo) 5.12 , La(NiSnMn) 5.12 , and La(NiSnCoMnAl) 5.10 were studied. It is shown that the second minor phase does not exist in the major phase through the X ray diffraction analysis. By the measurements of the crystal lattice constant, the volume of crystal lattice decreases with the increasing of the amount of atom B in AB 5. It is more obvious when the element nickel in B is partially subsituted by other elements. For non stoichiometric alloys, the lattice volume greatly increases when Ni is partially substituted by Sn. The lattice constant is also effected by the addition of Mn, Co, and Al. By means of electrochemical measurements, the plateau pressure of hydrogen absorption/desorption is measured with the results that Sn, Co, Mn and Al decrease the plateau pressure. 展开更多
关键词 rare earths hydrogen absorbing alloy non stoichiometric Ni MH battery crystal structure
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A METHOD FOR THE ANALYSIS OF DYNAMIC RESPONSE OF STRUCTURE CONTAINING NON-SMOOTH CONTACTABLE INTERFACES 被引量:3
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作者 刘晶波 刘书 杜修力 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 1999年第1期63-72,共10页
A novel single-step method is proposed for the analysis of dynamic response of visco-elastic structures containing non-smooth contactable interfaces. In the method, a two-level algorithm is employed for dealing with a... A novel single-step method is proposed for the analysis of dynamic response of visco-elastic structures containing non-smooth contactable interfaces. In the method, a two-level algorithm is employed for dealing with a nonlinear boundary condition caused by the dynamic contact of interfaces. At the first level, an explicit method is adopted to calculate nodal displacements of global viscoelastic system without considering the effect of dynamic contact of interfaces and at the second level, by introducing contact conditions of interfaces, a group of equations of lower order is derived to calculate dynamic contact normal and shear forces on the interfaces. The method is convenient and efficient for the analysis of problems of dynamic contact. The accuracy of the method is of the second order and the numerical stability condition is wider than that of other explicit methods. 展开更多
关键词 non-smooth contactable interfaces visco-elastic structure dynamic response
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Non-Simultaneous Failure of Ice in Front of Multi-Leg Structures 被引量:3
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作者 史庆增 黄焱 +1 位作者 宋安 佟建峰 《China Ocean Engineering》 SCIE EI 2002年第2期183-192,共10页
Because the multi-leg jacket structure is the major type of offshore structures in the Bohai Sea, the study of non-simultaneous failure of ice on multi-leg structures is important. However, the non-simultaneous failur... Because the multi-leg jacket structure is the major type of offshore structures in the Bohai Sea, the study of non-simultaneous failure of ice on multi-leg structures is important. However, the non-simultaneous failure has not been considered in engineering design until now, obviously resulting in costly design and notable waste. To resolve this problem, this paper, by means of analysis of experimental data, calculates the coefficient of the non-simultaneous failure for the double-pile structure, the square four-leg structure, the single-line multi-pile structure, and the conical structure, respectively, and provides some reference criteria for engineering design. 展开更多
关键词 multi-leg structure PILE CONE ice force non-simutaneous failure of ice coefficient of non-simultaneous failure af ice
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Electronic structures of stacked layers quantum dots:influence of the non-perfect alignment and the applied electric field 被引量:2
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作者 贾博雍 俞重远 +4 位作者 刘玉敏 韩利红 姚文杰 冯昊 叶寒 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第2期448-452,共5页
Electronic structures of the artificial molecule comprising two truncated pyramidal quantum dots vertically coupled and embedded in the matrix are theoretically analysed via the finite element method. When the quantum... Electronic structures of the artificial molecule comprising two truncated pyramidal quantum dots vertically coupled and embedded in the matrix are theoretically analysed via the finite element method. When the quantum dots are completely aligned, the electron energy levels decrease with the horizontally applied electric field. However, energy levels may have the maxima at non-zero electric field if the dots are staggered by a distance of several nanometers in the same direction of the electric field. In addition to shifting the energy levels, the electric field can also manipulate the electron wavefunctions confined in the quantum dots, in company with the non-perfect alignment. 展开更多
关键词 electronic structure quantum dot non-perfect alignment electric field
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A method for stochastic seismic response analysis of non-classically damped structures 被引量:2
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作者 徐清 高存臣 王君杰 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2004年第1期75-84,共10页
A method to calculate the stationary random response of a non-classically damped structure is proposed that features clearly-defined physical meaning and simple expression. The method is developed in the frequency dom... A method to calculate the stationary random response of a non-classically damped structure is proposed that features clearly-defined physical meaning and simple expression. The method is developed in the frequency domain. The expression of the proposed method consists of three terms, i.e., modal velocity response, modal displacement response, and coupled (between modal velocity and modal displacement response). Numerical results from the parametric study and three example structures reveal that the modal velocity response term and the coupled term are important to structural response estimates only for a dynamic system with a tuned mass damper. In typical cases, the modal displacement term can provide response estimates with satisfactory accuracy by itself, so that the modal velocity term and coupled term may be ignored without loss of accuracy. This is used to simplify the response computation of non-classically damped structures. For the white noise excitation, three modal correlation coefficients in closed form are derived. To consider the modal velocity response term and the coupled term, a simplified approximation based on white noise excitation is developed for the case when the modal velocity response is important to the structural responses. Numerical results show that the approximate expression based on white noise excitation can provide structural responses with satisfactory accuracy. 展开更多
关键词 non-classically damped structures random response modal correlation coefficients
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Effects of renal artery stenosis on realistic model of abdominalaorta and renal arteries incorporating fluid-structureinteraction and pulsatile non-Newtonian blood flow 被引量:4
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作者 Z.MORTAZAVINIA A.ZARE A.MEHDIZADEH 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2012年第2期165-176,共12页
The effects of the renal artery stenosis (RAS) on the blood flow and vessel walls are investigated. The pulsatile blood flow through an anatomically realistic model of the abdominal aorta and renal arteries reconstr... The effects of the renal artery stenosis (RAS) on the blood flow and vessel walls are investigated. The pulsatile blood flow through an anatomically realistic model of the abdominal aorta and renal arteries reconstructed from CT-scan images is simulated, which incorporates the fluid-structure interaction (FSI). In addition to the investigation of the RAS effects on the wall shear stress and the displacement of the vessel wall, it is determined that the RAS leads to decrease in the renal mass flow. This may cause the activation of the renin-angiotension system and results in severe hypertension. 展开更多
关键词 renal artery stenosis (RAS) PULSATILE fluid-structure interaction (FSI) non-Newtonian HYPERTENSION
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Research on semi-active control method of a building structure based on non-smooth control 被引量:2
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作者 Wang Qing Wang Jianhui Ma Kemao 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2019年第2期425-432,共8页
This study investigates the effectiveness of the non-smooth semi-active control algorithm on suppressing the vibration performance of a building structure subjected to seismic waves. According to the Lyapunov stabilit... This study investigates the effectiveness of the non-smooth semi-active control algorithm on suppressing the vibration performance of a building structure subjected to seismic waves. According to the Lyapunov stability theory, it has bene proven that the non-smooth semi-active control algorithm can achieve a finite-time stability of the vibration relative to the isolation layer of a building structure. Through numerical simulation of two buildings with different parameters subjected to the input of a seismic wave, the vibration conditions of passive control, LQR semi-active control and non-smooth semiactive control are compared and analyzed. The simulation results show that the non-smooth semi-active control algorithm has a better robustness and effectiveness in restraining the impact of earthquakes on the structure. 展开更多
关键词 building structure ISOLATION LAYER SEMI-ACTIVE CONTROL non-SMOOTH CONTROL vibration
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Steady-State Cornering Properties of a Non-pneumatic Tire with Mechanical Elastic Structure 被引量:2
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作者 Fu Hongxun Zhao Youqun +2 位作者 Lin Fen Du Xianbin Zhu Mingmin 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2017年第5期586-592,共7页
Mechanical elastic wheel(ME-wheel)is a new type of non-inflatable safety tyre,and the structure is significantly different from traditional pneumatic tyre.In order to investigate cornering properties of ME-wheel,exper... Mechanical elastic wheel(ME-wheel)is a new type of non-inflatable safety tyre,and the structure is significantly different from traditional pneumatic tyre.In order to investigate cornering properties of ME-wheel,experimental research on mechanics characteristics of ME-wheel under steady-state cornering conditions are carried out.The test of steady-state cornering properties of ME-wheel at different experimental parameter conditions is conducted by test bench for dynamic mechanical properties of tyre.Cornering property curves are used to analyze the steady-state cornering properties of ME-wheel,namely the variation tendency of lateral force or aligning torque with the increase of side-slip angle.Moreover,evaluation indexes for cornering properties of ME-wheel are extracted and the effect of different experimental parameters(including vertical load,friction coefficient,and speed)on cornering properties of ME-wheel is contrastively analyzed.The proposed research can provide certain reference to facilitate structure parameters and cornering properties optimizing process of ME-wheel. 展开更多
关键词 tyres non-pneumatic tyre mechanical elastic structure steady-state cornering properties
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Crystal Structure of Natural Non-metamict Ti- and Fe^(2+)-rich Chevkinite-(Ce) 被引量:1
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作者 LIGuowu YANGGuangming +4 位作者 MAZhengsheng SHINicheng XIONGMing FANHaifu SHENGGanfu 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2005年第3期325-331,共7页
The crystal structure of non-metamict Ti- and Fe2+-rich chevkinite-(Ce) has been redetermined with the single -crystal sample collected from Bayan Obo, Inner Mongolia, China. The chemical formula of the sample is Ce4F... The crystal structure of non-metamict Ti- and Fe2+-rich chevkinite-(Ce) has been redetermined with the single -crystal sample collected from Bayan Obo, Inner Mongolia, China. The chemical formula of the sample is Ce4Fe2Ti3Si4O22. The crystals are monoclinic with the unit cell parameters a = 13.4656(15) ?, b = 5.7356(6) ?, c = 11.0977(12) ?, β= 100.636(2)o, V = 842.39 (16) ?3 and Z = 2. The structures of Ti- and Fe2+-rich chevkinite-(Ce) were refined with space groups P21/a and C2/m. Least-squares refinement results show that both structural models of Ti- and Fe2+-rich chevkinite-(Ce) are very good, R[F2>2σ(F2)] =0.027 with P21/a and R[F2>2σ(F2)] =0.021 with C2/m. In order to illustrate the relationship between the two space groups P21/a and C2/m, the distribution of diffraction intensities was inspected. Pseudo extinction was found, i.e., reflections with h+k=2n are systematically strong, while those with h+k=2n+1 are weak. By neglecting the systematically weak (h+k=2n+1) reflections the space group becomes C2/m. There is a mirror plane in the C2/m perpendicular to the b axis. However, oxygen atoms in the P21/a model are of a symmetrical relationship with the corresponding pseudo mirror plane. It is concluded that the crystal structure of non-metamict Ti- and Fe2+-rich chevkinite-(Ce) is a superstructure with the space group of P21/a, which is of pseudo symmetry corresponding to the space group C2/m. 展开更多
关键词 non-metamict Ti- and Fe2+-rich chevkinite-(Ce) crystal structure space group superstructure
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Some Problems in Nonlinear Dynamic Instability and Bifurcation Theory for Engineering Structures 被引量:1
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作者 彭妙娟 程玉民 《Journal of Shanghai University(English Edition)》 CAS 2005年第1期29-34,共6页
In civil engineering, the nonlinear dynamic instability of structures occurs at a bifurcation point or a limit point. The instability at a bifurcation point can be analyzed with the theory of nonlinear dynamics, and t... In civil engineering, the nonlinear dynamic instability of structures occurs at a bifurcation point or a limit point. The instability at a bifurcation point can be analyzed with the theory of nonlinear dynamics, and that at a limit point can be discussed with the theory of elastoplasticity. In this paper, the nonlinear dynamic instability of structures was treated with mathematical and mechanical theories. The research methods for the problems of structural nonlinear dynamic stability were discussed first, and then the criterion of stability or instability of structures, the method to obtain the bifurcation point and the limit point, and the formulae of the directions of the branch solutions at a bifurcation point were elucidated. These methods can be applied to the problems of nonlinear dynamic instability of structures such as reticulated shells, space grid structures, and so on. Key words nonlinear dynamic instability - engineering structures - non-stationary nonlinear system - bifurcation point - instability at a bifurcation point - limit point MSC 2000 74K25 Project supported by the Science Foundation of Shanghai Municipal Commission of Education (Grant No. 02AK04), the Science Foundation of Shanghai Municipal Commission of Science and Technology (Grant No. 02ZA14034) 展开更多
关键词 nonlinear dynamic instability engineering structures non-stationary nonlinear system bifurcation point instability at a bifurcation point limit point
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Experiment and numerical simulation on the characteristics of fluid–structure interactions of non-rigid airships 被引量:1
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作者 Xiaocui Wu Yiwei Wang +2 位作者 Chenguang Huang Yubiao Liu Lingling Lu 《Theoretical & Applied Mechanics Letters》 CAS CSCD 2015年第6期258-261,共4页
Fluid-structure interaction is an important issue for non-rigid airships with inflated envelopes. In this study, a wind tunnel test is conducted, and a loosely coupled procedure is correspondingly established for nume... Fluid-structure interaction is an important issue for non-rigid airships with inflated envelopes. In this study, a wind tunnel test is conducted, and a loosely coupled procedure is correspondingly established for numerical simulation based on computational fluid dynamics and nonlinear finite element analysis methods. The typical results of the numerical simulation and wind tunnel experiment, including the overall lift and deformation, are in good agreement with each other. The results obtained indicate that the effect of fluid-structure interaction is noticeable and should be considered for non-rigid airships. Flow- induced deformation can further intensify the upward lift force and pitching moment, which can lead to a large deformation. Under a wind speed of 15 m/s, the lift force of the non-rigid model is increased to approximatelv 60% compared with that of the rigid model under a high angle of attack. 展开更多
关键词 Fluid-structure interaction non-rigid airships Numerical simulation Wind tunnel test
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GLASS FORMATION AND STRUCTURE OF NON-OXIDE GLASSES
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作者 于福熹 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 1994年第3期1-8,共8页
In this paper the characteristics of glass formation and structure of non-oxide glasses, have been summarized and some basic points have been discussed. The main points are as follows-Chemical bond nature is a deter-m... In this paper the characteristics of glass formation and structure of non-oxide glasses, have been summarized and some basic points have been discussed. The main points are as follows-Chemical bond nature is a deter-minative factor of formation and structure of glass ;Calcu-lation of glass formation ability by chemical bond paramiters; Classification of inorganic glass systems by characteristics of short range order of the glass structure; Structural models of non-oxide glasses. 展开更多
关键词 glass formation non-oxide glasses structure
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Non-covalent interaction between almond protein and sinapic acid: impact on protein structure and antioxidant activity 被引量:2
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作者 Xiao Jia Xin Ning +4 位作者 Wenlin Li Qianchun Deng Xiao Yu Chen Cheng Qi Zhou 《Oil Crop Science》 2019年第4期275-284,共10页
Plant phenolic acids are good sources of antioxidants and sinapic acid(SA)is one of them that can be applied in protein-based food system.However,little research is available regarding interactions between almond prot... Plant phenolic acids are good sources of antioxidants and sinapic acid(SA)is one of them that can be applied in protein-based food system.However,little research is available regarding interactions between almond protein(AP)and SA.In this study,structure-affinity interaction between SA and AP,structure and antioxidant activity of proteins were investigated.Different mathematical models showed that Ka of binding SA and AP were 3.27×10^4 L/mol and 3.08×10^4 L/mol.CD(Circular dichroism)spectroscopy and FT-IR(Fourier transform infrared)spectroscopy showed that the amount of random coil andα-helix decreased whileβ-sheet increased in AP-SA complex.In combination,the interaction model of AP-SA complex was static quenching and attributed to hydrophobic interaction.Further,AP-SA complex exerted better DPPH radical scavenging ability(36.97±0.78%),ABTS+radical scavenging ability(47.26±0.45%),and higher ORAC value(2.41±0.23 M trolox/g)compared to AP.In the further,SA can be applied in protein matrix to improve film stability,gel strength and restraining fat oxidation degradation. 展开更多
关键词 ALMOND protein(AP) sinapic acid(SA) non-COVALENT interaction structure ANTIOXIDANT activities
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Analysis of the Development Structure on Non-governmental Enterprises of Science and Technology
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作者 杨俊保 龚本刚 《Journal of Donghua University(English Edition)》 EI CAS 2002年第2期131-134,共4页
Based on the development of the non-governmental enterprises of science and technology in the past twenty years, this paper applied an interpretive structure model (ISM) to make a research on the regular development p... Based on the development of the non-governmental enterprises of science and technology in the past twenty years, this paper applied an interpretive structure model (ISM) to make a research on the regular development pattern of these enterprises and to probe into the interior development mechanism theoretically. The studying results supply ideas underlying the scientific decision for the governments at all levels and show the direction of the development of the non-governmental enterprises of science and technology in the future. 展开更多
关键词 non-governmental ENTERPRISES of SCIENCE and TECHNOLOGY interpretive structure model
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A New Non-uniform Beam Element and Its Application to Buckling Analysis for Framed Structures
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作者 陆念力 王佳 《Journal of Donghua University(English Edition)》 EI CAS 2012年第2期111-114,共4页
The non-uniform beam components are commonly used in engineering,while the method to analyze such component is not too satisfactory yet. A new non-uniform beam element with high precision was developed based on the no... The non-uniform beam components are commonly used in engineering,while the method to analyze such component is not too satisfactory yet. A new non-uniform beam element with high precision was developed based on the non-linear analysis and the static condensation. Based on the interpolation theory, the displacement fields of the three-node non-uniform Euler-Bernoulli beam element were constructed at first: the quintic Hermite interpolation polynomial was used for the lateral displacement field and the quadratic Lagrange interpolation polynomial for the axial displacement field. Then,based on the basic assumptions of non-uniform Euler-Bernoulli beam whose section properties were continuously varying along its centroidal axis, the linear and geometric stiffness matrices of the three-node non-uniform beam element were derived according to the nonlinear finite element theory. Finally,the degrees of freedom ( DOFs) of the middle node of the element were eliminated using the static condensation method, and a new two-node non-uniform beam element including axial-force effect was obtained. The results indicate that each bar needs to be meshed with only one element could get a fairly accurate solution when it is applied to the stability analyses. 展开更多
关键词 non-uniform beam element finite element method structural buckling framed structures static condensation
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Decomposition of almost-Poisson structure of generalised Chaplygin's nonholonomic systems
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作者 刘畅 常鹏 +1 位作者 刘世兴 郭永新 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第3期21-26,共6页
This paper constructs an almost-Poisson structure for the non-self-adjoint dynamical systems, which can be decomposed into a sum of a Poisson bracket and the other almost-Poisson bracket. The necessary and sufficient ... This paper constructs an almost-Poisson structure for the non-self-adjoint dynamical systems, which can be decomposed into a sum of a Poisson bracket and the other almost-Poisson bracket. The necessary and sufficient condition for the decomposition of the almost-Poisson bracket to be two Poisson ones is obtained. As an application, the almost- Poisson structure for generalised Chaplygin's systems is discussed in the framework of the decomposition theory. It proves that the almost-Poisson bracket for the systems can be decomposed into the sum of a canonical Poisson bracket and another two noneanonical Poisson brackets in some special cases, which is useful for integrating the equations of motion. 展开更多
关键词 almost-Poisson structure non-self-adjointness Jacobi identity generalised Chaplygin'snonholonomic systems
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NON-EQUILIBRIUM SEGREGATION STRUCTURE OF P IN COLD ROLLED Fe-P ALLOYS AND ITS RELATION WITH TEXTURE VARIATION
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作者 ZHANG Lixin NING Hua Laboratory of Corrosion Science,Institute of Corrosion and Protection of Metals,Academia Sinica.Shenyang,ChinaZHOU Jing LI Liguang Institute of Metal Research,Academia Sinica,Shenyang,China Professor,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang 110015,China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1992年第6期425-431,共7页
The relations between the non-equilibrium segregation process of P and the change of the texture in Fe-P alloys have been studied by analytical electron microscope and orientation distribution function.It was shown th... The relations between the non-equilibrium segregation process of P and the change of the texture in Fe-P alloys have been studied by analytical electron microscope and orientation distribution function.It was shown that P segregated preferentialy on the{110}slip planes, the P segregation structures with repeating cycle a=1.582 nm form at 450℃.<001>// ND direction abated.<111>//ND direction heightened.And{111}<110>has a tendancy to transform into{111}<143>texture in recovering process.{111}<143>direction trans- forms into{111}<112>direction after recrystalizing.A model to describe the effects of non-equilibrium segregation structures of P on orientation change was proposed and em- ployed to interpret the experiment results. 展开更多
关键词 Fe-P Alloy lattice image recovering process non-equalibrium segregation structure
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Structure-preserving approach for infinite dimensional nonconservative system
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作者 Weipeng Hu 《Theoretical & Applied Mechanics Letters》 CAS CSCD 2018年第6期404-407,I0005,共5页
The current structure-preserving theory, including the symplectic method and the multisymplectic method, pays most attention on the conservative properties of the continuous systems because that the conservative prope... The current structure-preserving theory, including the symplectic method and the multisymplectic method, pays most attention on the conservative properties of the continuous systems because that the conservative properties of the conservative systems can be formulated in the mathematical form. But, the nonconservative characteristics are the nature of the systems existing in engineering. In this letter, the structure-preserving approach for the infinite dimensional nonconservative systems is proposed based on the generalized multi-symplectic method to broaden the application fields of the current structure-preserving idea. In the numerical examples,two nonconservative factors, including the strong excitation on the string and the impact on the cantilever, are considered respectively. The vibrations of the string and the cantilever are investigated by the structure-preserving approach and the good long-time numerical behaviors as well as the high numerical precision of which are illustrated by the numerical results presented. 展开更多
关键词 structure-preserving approach Generalized multi-symplectic HAMILTONIAN nonconservative system non-smooth model
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Synthesis, Structure and Third-order Non-linear Optical Properties of Tungsten Dioxo Complex with 8-Hydroxyquinoline Ligand WO_2(C_9H_6NO)_2
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作者 LIYong LUJing +6 位作者 XUJi-qing CUIXiao-bing SUNYing-hua LIKe-chang YANGQing-xin PANLing-yun BIEHai-ying 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2004年第6期681-684,共4页
Tungsten dioxo complex WO 2(C 9H 6NO) 2 was obtained via the low temperature solid-state reaction of(NH 4) 2WS 4, 8-hydroxyquinoline(8-hq) and(CH 3) 4NI, and it was characterized by means of elemental analyse... Tungsten dioxo complex WO 2(C 9H 6NO) 2 was obtained via the low temperature solid-state reaction of(NH 4) 2WS 4, 8-hydroxyquinoline(8-hq) and(CH 3) 4NI, and it was characterized by means of elemental analyses, IR spectroscopy and X-ray diffraction analysis. The crystal of the title compound belongs to monoclinic, space group C2/c, with the crystal cell parameters: a=1.3316(3) nm, b=0.94444(19) nm, c=1.3485(3) nm, β=109.66(3)°, V=1.5970(6) nm 3, Z=6. The title compound possesses a supramolecular structure formed through hydrogen bonds and π-π stacking interactions. The third-order non-linear optical(NLO) properties of the title compound were also investigated. The third-order non-linear absorption coefficient α 2 and refractive index n 2 are 0.85×10 -11 m/W -1 and -1.5×10 -19 m 2/W, respectively. The third-order non-linear susceptibility χ (3) is 3.03×10 -13 esu for 3.8×10 -5 mol/L sample concentration. 展开更多
关键词 Tungsten dioxo complex Solid state reaction Supramolecular structure Third-order non-linear optical property
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