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Highly sensitive Fe^(3+)luminescence detection via single-ion adsorption
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作者 Yujing Li Xiaojun Zhang +2 位作者 Zicheng Wang Lina Zhao Yuxin Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第1期431-434,共4页
To achieve a lower detection limit has always been a goal of analytical chemists.Herein,we demonstrate the first picomolar level detection capability for Fe3+ion via luminescence detection technology.The results of st... To achieve a lower detection limit has always been a goal of analytical chemists.Herein,we demonstrate the first picomolar level detection capability for Fe3+ion via luminescence detection technology.The results of structural analysis and theoretical calculation show that Fe3+ions are adsorbed on the central node of Eu-DBM(DBM=dibenzoylmethane)sensor in the form of single ion at ultralow concentration.Subsequently,the pathways of photo-induced charge and energy transfer of the obtained Eu-DBM@Fe^(3+)material have been changed,from the initial DBM-to-Eu^(3+)before Fe^(3+)adsorption to the ultimate DBM-to-Fe^(3+)after adsorption process,which quenches the luminescence of Eu3+ion.This work not only obtains the highly sensitive luminescence detection ability,but also innovatively proposes the single-ion adsorption mechanism,both of which have important scientific and application values for the development of more efficient detection agents in the future. 展开更多
关键词 luminescence detection Lanthanide complex High sensitivity Fe^(3+)ion Single-ion adsorption
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Preliminary Studies on High-performance Liquid Chro-matography Chemiluminescence Determination of theSaturated Fatty Acids(C_(16) C_(18))in Human Serum 被引量:1
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作者 段更利 中岛宪一郎 +1 位作者 黑田直敬 秋山修三 《Journal of Chinese Pharmaceutical Sciences》 CAS 1995年第1期22-29,共8页
The peroxyoxalate chemiluminescence(CL)detection of fatty acids in human se- rum combined with high-performance liquid chromatography (HPLC)is described.Some fatty acids in serum were extracted with a 1 :1(v/v)mixture... The peroxyoxalate chemiluminescence(CL)detection of fatty acids in human se- rum combined with high-performance liquid chromatography (HPLC)is described.Some fatty acids in serum were extracted with a 1 :1(v/v)mixture of chloroform-n-heptane.2-(4-Hydrazinocarbonyl- phenyl)-4,5-diphenylimidazole (HCPI) was used as a fluorescent labelling reagent of the fatty acids. The labelling reaction was carried out at 30℃ for 1 h at pH 6.5 and the resulting reaction mixture was sudjected to HPLC. The labelled fatty acid C_(17)(P-C_(17))was used as the internal standard. The la- belled fatty acids C_(16) and C_(18) were separated within 18 min on an ODS-8OTM column (150 mm× 6 mm ID,5μm,Tosoh Japan).The calibrlation curves of fatty acids from the spiked control serum were Y_1=-0.003 7 + 0.0028X_1,r=0.994 for FA C_( 16) and Y_2=0.00 1 2 + 0.00098X_2,r=0.999 for FA C_( 18),respectively.The average recoveries of facids from the spiked contrl serum were 107.2%(n=8,RSD=4.3%)for FA C_(16) and 97.35%(n=8, RSD=4.0%)for FA C_(18),respectively.The lower detection limits of fatty acids after reaction were 12μmol per 20μl injection for FA C_(16) and 18 μmol per 20μl injection for FA C_(18),respectively(signal to noise ratio, S/N=2).The HPLC/CL method was applied to the determination of FA C_(16) and FA C_(18) in normal human serum and the results showed that the concentrations of fatty acids in normal human serum were 0.134 ± 0.009 μ mol/ml serum(n=5) for FA C_(16) and 0.052±0.028 μmol/ml serum(n=5)for FA C_(18),respectively. 展开更多
关键词 Fatty acids High-performance Liquid Chromatography Peroxyoxalate chemi- luminescence detection Human serum
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A novel strategy of constructing 2D supramolecular organic framework sensor for the identification of toxic metal ions 被引量:1
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作者 Ying Wang Ning Han +5 位作者 Chao-Qun Ma Hui Liu Shengsheng Yu Rongzhou Wang Vijay Kumar Thakur Ling-Bao Xing 《Nano Materials Science》 EI CAS CSCD 2023年第3期335-342,共8页
Two novel two-dimensional(2D)supramolecular organic frameworks were fabricated in water based on the encapsulation-enhanced donor-acceptor interaction between the methyl viologen(MV)units,methoxy naphthyl(MN)units,and... Two novel two-dimensional(2D)supramolecular organic frameworks were fabricated in water based on the encapsulation-enhanced donor-acceptor interaction between the methyl viologen(MV)units,methoxy naphthyl(MN)units,and CB[8].The tetraphenylethylene(TPE)derivatives 1 with four MV units were employed as rigid building blocks and the two MN units modified oligoethylene glycol derivatives 2 and 3 served as flexible edges,respectively.The obtained two SOFs have obvious sheet-like structures and exhibit fluorescence emission at 350-500 nm.In addition,these two SOFs were employed for the luminescent detection of Cr(Ⅵ)and Mn(Ⅶ)in aqueous solutions,and the detection limits of CrO_(4)^(2-),Cr_(2)_(O)_(7)^(2-),and MnO_(4)were calculated in a very low concentration range,indicating that these two SOFs can serve as a potential sensor for Cr(Ⅵ)and Mn(Ⅶ)detection in water.This work constructs two SOFs in an aqueous solution through a facile method and further enriches the applications of SOFs. 展开更多
关键词 Two-dimensional supramolecular organic framework Encapsulation-enhanced donor-acceptor interaction Luminescent detection
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Rapid detection of nanoplastic particles by a luminescent Tb-based coordination polymer
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作者 Tiankai Sun Hui Min +3 位作者 Zongsu Han Liang Wang Peng Cheng Wei Shi 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第5期529-533,共5页
Nanoplastics(NPs)in aqueous environment have become a category of emerging pollutants on account of their potential risks to both human health and environment.The detection of NPs is a great challenge due to the lack ... Nanoplastics(NPs)in aqueous environment have become a category of emerging pollutants on account of their potential risks to both human health and environment.The detection of NPs is a great challenge due to the lack of sensitive and selective sensing materials with fast response time and wide sensing range of particle sizes.Herein,a Tb-based coordination polymer has been synthesized for luminescent detection of nanopolystyrene with different particle sizes in aqueous solutions,showing a low limit of detection,fast response time within 10 s and high selectivity in the presence of other plastics.The“turn-on”sensing mechanism is studied in detail.This work provides a facile method for the fast detection of NPs. 展开更多
关键词 Coordination polymer Nano polystyrene Luminescent detection Sensing mechanism Water safety
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Concentration sensing system with monolithic InGaN/GaN photonic chips 被引量:1
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作者 Feifei Qin Xueyao Lu +7 位作者 Yang Chen Xumin Gao Yue Cao Lei Zhang Junfeng Lu Xiaoxuan Wang Gangyi Zhu Yongjin Wang 《Chinese Optics Letters》 SCIE EI CAS CSCD 2024年第6期170-176,共7页
Using an identical monolithic InGaN/GaN light emitting diode (LED) array as the sensing module and a well-designed data processing module, we demonstrate a small-size concentration sensing prototype. Overlap between t... Using an identical monolithic InGaN/GaN light emitting diode (LED) array as the sensing module and a well-designed data processing module, we demonstrate a small-size concentration sensing prototype. Overlap between the emission and the response spectra of the InGaN/GaN LED makes each pair of LEDs in the arrayed chip form a sensing channel. The changes in liquid concentration can be transformed into variation of photocurrent. The system's sensing properties are further optimized by varying the position, number of receivers, and packaging reflectors. With methyl orange as a tracer agent, the sensing system's resolution is 0.286 μmol/L with a linear measurement region below 40 μmol/L. 展开更多
关键词 InGaN/GaN diodes array liquid concentration sensing coexistence of luminescence detection
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Upconversion luminescence turning of NaREF4(RE=0.4Y+0.4La+0.2(Yb, Er, Tm))nanoparticles and their applications for detecting Rhodamine B in shrimp 被引量:2
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作者 胡仕刚 余意 +6 位作者 吴笑峰 胡盼 曹会祎 吴青杨 唐志军 郭源君 刘云新 《Journal of Rare Earths》 SCIE EI CAS CSCD 2017年第2期120-126,共7页
Biocompatible NaREF_4(RE=0.4Y+0.4La+0.2(Yb,Er,Tm)(molar ratio)) upconversion nanoparticles(UCNPs) with strong visible fluorescence were synthesized by a solvothermal method and subsequent surface modificatio... Biocompatible NaREF_4(RE=0.4Y+0.4La+0.2(Yb,Er,Tm)(molar ratio)) upconversion nanoparticles(UCNPs) with strong visible fluorescence were synthesized by a solvothermal method and subsequent surface modification. Modulated upconversion luminescence emission spectra were obtained via changing the doping. In vitro and in vivo bioimagings were carried out with shrimps. The upconversion nanoprobes with an acidic/PEG hybrid ligand could quickly capture the basic Rhodamine-B(RB) in shrimp cells and formed a close UCNPs@RB system. The residual organic dye RB in shrimps could be detected on the basis of luminescent resonance energy transfer(LRET). It could be rapidly addressed based on LRET detection that RB residue existed in the shrimps after incubating in the aqueous solution of RB higher than 3 μg/m L for 12 h. 展开更多
关键词 nanoparticles upconversion luminescence in vivo detecting organic dyes rare earths
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A water-stable metal-organic framework: serving as a chemical sensor of PO43– and a catalyst for CO2 conversion 被引量:3
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作者 Bin Zhai Hang Xu +2 位作者 Zhong-Yi Li Chun-Shuai Cao Bin Zhao 《Science China Chemistry》 SCIE EI CAS CSCD 2017年第10期1328-1333,共6页
A new 2D Eu-BTB framework(1) with stratified gridding structure of about 14.6×16.9was synthesized and characterized.Compound 1 displays excellent water stability with the pH 2–12. The luminescent investigations ... A new 2D Eu-BTB framework(1) with stratified gridding structure of about 14.6×16.9was synthesized and characterized.Compound 1 displays excellent water stability with the pH 2–12. The luminescent investigations suggest that 1 could represent a chemical sensor of PO43. with high sensitivity and selectivity. Importantly, 1 as a sensor of PO_4^(3-) can be reused at least five times.On the other hand, the catalytic investigations of 1 were carried out, indicating that 1 could be demonstrated as a recyclable catalyst for CO_2 conversion with epoxides. 展开更多
关键词 MOFs water and pH stability luminescent detection CO_2 conversion
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