The crystal structure of fused photochromic diarylethene dimer, 1,4-bis-[4-(4-{2-(5-phenyl)-2-methyl-thiophen-3-yl]-3,3,4,4,5,5-hexafluoro-cyclopent-1-enyl}-5-methyl-thiophen-2-yl) buta-1,3-diyne(1 oo, C46 H23 F12 S4)...The crystal structure of fused photochromic diarylethene dimer, 1,4-bis-[4-(4-{2-(5-phenyl)-2-methyl-thiophen-3-yl]-3,3,4,4,5,5-hexafluoro-cyclopent-1-enyl}-5-methyl-thiophen-2-yl) buta-1,3-diyne(1 oo, C46 H23 F12 S4) was determined by single-crystal X-ray diffraction analysis. This crystal belongs to the triclinic system, space group P1 with a = 7.546(3), b = 8.869(3), c = 16.196(5), α = 98.000(4)°, β = 100.803(4)°, γ = 98.449(4)°, Z = 2, V = 1037.6(6) ?~3, Dc = 1.496 mg/m^3, μ = 0.317, F(000) = 474, the final R = 0.0428 and wR = 0.1199 for 4115 observed reflections(I > 2σ(I)). Further study demonstrated this compound underwent reversible photochromism with color-switching between colorlessness and green in crystalline state. Upon 365 nm irradiation, the diarylethene shows one step photochromism to form isomer 1 oc. When irradiated with 312 nm, the stepwise photocyclization reactions occurred in diarylethene dimer through the line of 1 oo to 1 oc to 1 cc.展开更多
The reversible molecule switching of an assymmetrical photochromic diarylethene 1-[2-methy1-5-(3-chlorophenyl)-3-thienyl]-2-(1,2-dimethy1-3-indol) perfluorocyelopentene (1a) has been prepared for the examination of ph...The reversible molecule switching of an assymmetrical photochromic diarylethene 1-[2-methy1-5-(3-chlorophenyl)-3-thienyl]-2-(1,2-dimethy1-3-indol) perfluorocyelopentene (1a) has been prepared for the examination of photo-switching, fluorescence switching. This compound exhibited reversible photochromism, changing from colorless to blue after irradiation with UV light both in solution and in poly-methyl methacrylate (PMMA) amorphous film. Also, it exhibited remarkable fluorescence switching in the solid state. Using diarylethene 1b/PMMA film as recording medium, polarization optical recording was performed perfectly by a He-Ne laser with 633 nm wavelength. The results demonstrated that it can be potentially used as polarization optical recording medium.展开更多
Light-operated excited-state photochemical reactions and the resulting photochromic materials have gained significant attention for their promising technological applications in molecular electronic and photonic devic...Light-operated excited-state photochemical reactions and the resulting photochromic materials have gained significant attention for their promising technological applications in molecular electronic and photonic devices.To obtain photochromic materials(e.g.,diarylethenes)with desired properties,the way to tune energy processes of the excited state is essentially important,from both fundamental and practical viewpoints.The modified diarylethenes mostly focused on structural improvements to achieve efficient photochromism.We report here two new spiro-conjugated indenodiarylethenes(named,SFI-Th and SFI-Sul)with an orthogonally arranged spiroπ-scaffold.The spiro fluorene sterically constrains the free volume of photoactive side aromatic rings,while the spiro-conjugation points toward modulation of the decaying channels of excited-state energy,thus allowing for tuning photochromic performances.These spirodiarylethenes SFI-Th and SFI-Sul are readily accessible with low cost and show distinct photochromic and photoluminescent properties.On one hand,the SFI-Th bearing bisthienyl side rings,is an excellent photochromic switch showing high thermal stability and high fatigue resistance in both solution and amorphous state,likely benefited from steric-induced excited-state energy transfer into reversible photochemical reactions,owing to higherπ-orbital spiro-conjugation between the two molecular halves.On the other hand,the SFI-Sul with bissulfonyl side rings,most notably,displays quantitative photocyclization to yield SFI-Sulc upon excitation.However,the ring-closed SFI-Sulc has an extremely slow photocycloreversion,and meanwhile immediately switches on emissive state with a strong fluorescence(Φf=0.57 in amorphous powder state).We study the modulated roles of spiroπ-scaffold in both cases computationally and experimentally,and attribute the facilitated photochemical reaction to the positively electronic effects of spiro-conjugation,and the photo-responsive radiative transition to the negatively electronic effects of spiro-conjugation,respectively.In all,this work demonstrates that the spiro-conjugation is a new and efficient strategy to deliver excitation energy transfer(EET)for featured photochromic properties,due to its advantage in steric-induced electronic modulation.展开更多
Photon upconversion(UC)is one kind of anti-Stokes shift process,which generally requires a combination of two or more low-energy photons to produce one high-energy photon.However,another interesting anti-Stokes proces...Photon upconversion(UC)is one kind of anti-Stokes shift process,which generally requires a combination of two or more low-energy photons to produce one high-energy photon.However,another interesting anti-Stokes process,namely,single-photon-absorption-based upconversion(SPA-UC),can take place by exciting thermally excited vibrational-rotational energy levels of ground state to the first level of excited state.This phenomenon is less involved in organic systems due to the limitation of appropriate materials.Herein,for the first time,we have demonstrated a series of turn-on mode fluorescent diarylethenes,including Thiophene-and p-alkoxybromo-substituted phenyl-substituted derivatives(DAES and DAEC4),which exhibited SPA-UC phenomenon in the closed-ring state.An anti-Stokes shift of 0.36 eV was observed in these molecules,which was the highest value accessible in such UC systems.A relatively high quantum efficiency(13.5%)was evaluated through a relative method by using methylene blue as a standard.Phonon-assisted or hot band absorption was in charge of the achievement of SPA-UC.Besides,the upconverted emission could be switched on/off by cyclization and cycloreversion reaction,regulated by UV–visible light.Thus,this unique finding of the SPA-UC phenomena in photoswitchable diarylethenes might enrich the development of new molecular engineering strategies for designing photofunctional materials.展开更多
A novel family of diarylethene (DTE)-phthalocyanine (Pc) dyad systems were designed and synthesized. It was found that the significant change in the extension of the linear π-conjugation of DTE when irradiated by 254...A novel family of diarylethene (DTE)-phthalocyanine (Pc) dyad systems were designed and synthesized. It was found that the significant change in the extension of the linear π-conjugation of DTE when irradiated by 254 nm UV light directly made the absorption of the Q-band of phthalocyanine decrease. Detecting the absorption changes of the Q-band would not induce the reversible photochromic reaction. Therefore, non-destructive readout was feasible based on the spectral changes of the Q-band when such materials were used as storage media.展开更多
Among various photochromic compounds, diarylethenes (DAEs)have been widely studied and applied due to their excellent thermal bistability and fatigue resistance.Most researches are focused on the properties and applic...Among various photochromic compounds, diarylethenes (DAEs)have been widely studied and applied due to their excellent thermal bistability and fatigue resistance.Most researches are focused on the properties and applications of DAEs in solution.However, they meet the problem of fluorescence quenching at high concentration or at solid state which limits their performance in the practical applications.Fortunately,the DAE based photochromic aggregation-induced emission (AIE) materials do well in addressing this problem.This work here reviews the current research progress on the structures,properties and applications of the DAE based photochromic AIE materials and points out some existing problems so as to promote subsequent development of this field in the future.展开更多
The photochromic title compound,C_(26)H_(18)F_6N_2OS_2,contains a 2,5-dimethylthiophene ring and a N-formyl aminoquinolinyl thiophene ring on the C=C double bond of the cyclopentene ring.The dihedral angles between th...The photochromic title compound,C_(26)H_(18)F_6N_2OS_2,contains a 2,5-dimethylthiophene ring and a N-formyl aminoquinolinyl thiophene ring on the C=C double bond of the cyclopentene ring.The dihedral angles between the cyclopentene and attached N-formyl aminoquinolinyl thiophene ring and 2,5-dimethylthiophene ring are 63.0° and 137.1°,respectively.The dihedral angle between the thiophene ring and the adjacent aminoquinoline ring is 5.7°.The molecule adopts an antiparallel conformation,with a distance between the two photoreactive C atoms of 3.763 ?.In addition,the absorption and fluorescence spectral changes were measured in acetonitile and solid at room temperature,and the result showed that the title compound could undergo photochromic reaction in both states.展开更多
Two novel diarylfuorocyclopentenes, which underwent gated photochromism, were synthesized. It was found that the photochromic property of these diarylethenes could be switched by alternative addition of acids/alkalis,...Two novel diarylfuorocyclopentenes, which underwent gated photochromism, were synthesized. It was found that the photochromic property of these diarylethenes could be switched by alternative addition of acids/alkalis, which could provide a new design strategy toward chemical threshold photoreaction.展开更多
The development of solid-state smart materials, in particular those showing photoresponsive luminescence, is highly desirable for their cutting edge applications in displays, sensors, data-storage, and anticounterfeit...The development of solid-state smart materials, in particular those showing photoresponsive luminescence, is highly desirable for their cutting edge applications in displays, sensors, data-storage, and anticounterfeiting. However, to achieve both excellent photoresponsive performance and bright luminescence in solid state remains challenge. Herein, we integrate a novel photochromic fluorophore YL into flexible polymer chains, thereby enabling the resultant polymer PYL with reversible photoisomerization upon aggregation. Remarkably, the polymer PYL possesses excellent photochromic properties and aggregationinduced emission(AIE) activity, which can be attributed to the photoactive YL moiety. Upon light exposure, its film exhibits reversibly off-to-on fluorescent modulation with quick response, high emission efficiency and signal contrast, sharply different from the weak emission in solution. The novel photoresponsive AIE polymer with invisible/visible color and fluorescence transformation allows for advanced anti-counterfeiting applications. This work provides an efficient platform for constructing solid-state photocontrollable luminescent materials.展开更多
Spin-crossover(SCO)metal complexes are expected to be widely used in data storage materials,display devices and sensors.Although a lot of spin-crossover photoswitches have been developed,the reversible photomodulation...Spin-crossover(SCO)metal complexes are expected to be widely used in data storage materials,display devices and sensors.Although a lot of spin-crossover photoswitches have been developed,the reversible photomodulation cases that work at room temperature are limited.Herein,a novel cobalt complex o-1-Co(II)wherein the salen unit bridges with bis-diarylethene has been designed as switch to construct"off-on"logic operation at room temperature.The complex o-1-Co(II)displays an abrupt,reversible and hysteretic spin crossover(T1/2↓=166 K,T1/2↑=177 K,andΔT1/2=11 K)between the high-spin(HS)and low-spin(LS)states.Meanwhile,photocyclization of o-1-Co(II)with UV light produces a photoresponsive closed form c-1-Co(II),which always stays at low-spin without SCO at all.Moreover,the magnetic switching of the complex can also be achieved with redox reactions between Co(II)and Co(III).展开更多
In recent years,organic field-effect transistors(OFETs) with high performance and novel multifunctionalities have attracted considerable attention.Meanwhile,featured with reversible photoisomerization and the correspo...In recent years,organic field-effect transistors(OFETs) with high performance and novel multifunctionalities have attracted considerable attention.Meanwhile,featured with reversible photoisomerization and the corresponding variation in color,chemical/physical properties,photochromic molecules have been applied in sensors,photo-switches and memories.Incorporation of photochromic molecules to blend in the device functional layers or to modify the interfaces of OFETs is common way to build photo-transistors.In this review,we focus on the recent advantages on the study of photoresponsive transistors involving one of three typical photochromic compounds spiropyran,diarylethene and azobenzene.Three main strategies are demonstrated in detail.Firstly,photochromic molecules are doped in active layers or combined with semiconductor structure thus forming photoreversible active layers.Secondly,the modification of dielectric layer/active layer interface is mainly carried out by bilayer dielectric.Thirdly,the photo-isomerization of self-assembled monolayer(SAM) on the electrode/active layer interface can reversibly modulate the work functions and charge injection barrier,result in bifunctional OFETs.All in all,the combination of photochromic molecules and OFETs is an efficient way for the fabrication of organic photoelectric devices.Photoresponsive transistors consisted of photochromic molecules are potential candidate for real applications in the future.展开更多
基金Supported by the National Natural Science Foundation of China(21701065)"5511" Science and Technology Innovation Talent Project of Jiangxi Province(20165BCB18015)+2 种基金the Project of Natural Science Foundation of Jiangxi Province(20171ACB20025,20171BAB203011)the Project of the Science Funds of Jiangxi Education Office(GJJ170659)the Project of Jiangxi Advantage Sci-Tech Innovative Team(20142BCB24012)
文摘The crystal structure of fused photochromic diarylethene dimer, 1,4-bis-[4-(4-{2-(5-phenyl)-2-methyl-thiophen-3-yl]-3,3,4,4,5,5-hexafluoro-cyclopent-1-enyl}-5-methyl-thiophen-2-yl) buta-1,3-diyne(1 oo, C46 H23 F12 S4) was determined by single-crystal X-ray diffraction analysis. This crystal belongs to the triclinic system, space group P1 with a = 7.546(3), b = 8.869(3), c = 16.196(5), α = 98.000(4)°, β = 100.803(4)°, γ = 98.449(4)°, Z = 2, V = 1037.6(6) ?~3, Dc = 1.496 mg/m^3, μ = 0.317, F(000) = 474, the final R = 0.0428 and wR = 0.1199 for 4115 observed reflections(I > 2σ(I)). Further study demonstrated this compound underwent reversible photochromism with color-switching between colorlessness and green in crystalline state. Upon 365 nm irradiation, the diarylethene shows one step photochromism to form isomer 1 oc. When irradiated with 312 nm, the stepwise photocyclization reactions occurred in diarylethene dimer through the line of 1 oo to 1 oc to 1 cc.
文摘The reversible molecule switching of an assymmetrical photochromic diarylethene 1-[2-methy1-5-(3-chlorophenyl)-3-thienyl]-2-(1,2-dimethy1-3-indol) perfluorocyelopentene (1a) has been prepared for the examination of photo-switching, fluorescence switching. This compound exhibited reversible photochromism, changing from colorless to blue after irradiation with UV light both in solution and in poly-methyl methacrylate (PMMA) amorphous film. Also, it exhibited remarkable fluorescence switching in the solid state. Using diarylethene 1b/PMMA film as recording medium, polarization optical recording was performed perfectly by a He-Ne laser with 633 nm wavelength. The results demonstrated that it can be potentially used as polarization optical recording medium.
基金This work was supported by the National Natural Science Foundation of China(51922039)Hunan Provincial Natural Science Foundation(2018JJ1008).
文摘Light-operated excited-state photochemical reactions and the resulting photochromic materials have gained significant attention for their promising technological applications in molecular electronic and photonic devices.To obtain photochromic materials(e.g.,diarylethenes)with desired properties,the way to tune energy processes of the excited state is essentially important,from both fundamental and practical viewpoints.The modified diarylethenes mostly focused on structural improvements to achieve efficient photochromism.We report here two new spiro-conjugated indenodiarylethenes(named,SFI-Th and SFI-Sul)with an orthogonally arranged spiroπ-scaffold.The spiro fluorene sterically constrains the free volume of photoactive side aromatic rings,while the spiro-conjugation points toward modulation of the decaying channels of excited-state energy,thus allowing for tuning photochromic performances.These spirodiarylethenes SFI-Th and SFI-Sul are readily accessible with low cost and show distinct photochromic and photoluminescent properties.On one hand,the SFI-Th bearing bisthienyl side rings,is an excellent photochromic switch showing high thermal stability and high fatigue resistance in both solution and amorphous state,likely benefited from steric-induced excited-state energy transfer into reversible photochemical reactions,owing to higherπ-orbital spiro-conjugation between the two molecular halves.On the other hand,the SFI-Sul with bissulfonyl side rings,most notably,displays quantitative photocyclization to yield SFI-Sulc upon excitation.However,the ring-closed SFI-Sulc has an extremely slow photocycloreversion,and meanwhile immediately switches on emissive state with a strong fluorescence(Φf=0.57 in amorphous powder state).We study the modulated roles of spiroπ-scaffold in both cases computationally and experimentally,and attribute the facilitated photochemical reaction to the positively electronic effects of spiro-conjugation,and the photo-responsive radiative transition to the negatively electronic effects of spiro-conjugation,respectively.In all,this work demonstrates that the spiro-conjugation is a new and efficient strategy to deliver excitation energy transfer(EET)for featured photochromic properties,due to its advantage in steric-induced electronic modulation.
基金supported by National Natural Science Foundation of China(51673050,91856115,21905065,and 21907060)the Ministry of Science and Technology of the People’s Republic of China(2017YFA0206600 and 2016YFA0203400)support of China Postdoctoral Science Foundation(BX20180082 and 2019M650603).
文摘Photon upconversion(UC)is one kind of anti-Stokes shift process,which generally requires a combination of two or more low-energy photons to produce one high-energy photon.However,another interesting anti-Stokes process,namely,single-photon-absorption-based upconversion(SPA-UC),can take place by exciting thermally excited vibrational-rotational energy levels of ground state to the first level of excited state.This phenomenon is less involved in organic systems due to the limitation of appropriate materials.Herein,for the first time,we have demonstrated a series of turn-on mode fluorescent diarylethenes,including Thiophene-and p-alkoxybromo-substituted phenyl-substituted derivatives(DAES and DAEC4),which exhibited SPA-UC phenomenon in the closed-ring state.An anti-Stokes shift of 0.36 eV was observed in these molecules,which was the highest value accessible in such UC systems.A relatively high quantum efficiency(13.5%)was evaluated through a relative method by using methylene blue as a standard.Phonon-assisted or hot band absorption was in charge of the achievement of SPA-UC.Besides,the upconverted emission could be switched on/off by cyclization and cycloreversion reaction,regulated by UV–visible light.Thus,this unique finding of the SPA-UC phenomena in photoswitchable diarylethenes might enrich the development of new molecular engineering strategies for designing photofunctional materials.
基金Supported by the National Natural Science Key Foundation of China (Grant No: 20333080)National Natural Science General Foundations of China (Grant Nos: 20572059 and 20502013)Project of Development Plan of the State Key Fundamental Research (Grant No: 2007OB808000).
文摘A novel family of diarylethene (DTE)-phthalocyanine (Pc) dyad systems were designed and synthesized. It was found that the significant change in the extension of the linear π-conjugation of DTE when irradiated by 254 nm UV light directly made the absorption of the Q-band of phthalocyanine decrease. Detecting the absorption changes of the Q-band would not induce the reversible photochromic reaction. Therefore, non-destructive readout was feasible based on the spectral changes of the Q-band when such materials were used as storage media.
基金the National Basic Research Program (973)of China (Nos.2015CB755602,and 2013CB 922104)the National Natural Science Foundation of China (Grant Nos. 51673077,51603078,and 21474034)+1 种基金the Fundamental Research Funds for the Central Universities (HUST:2016YXMS029,HUST:2018KFYXKJ C033)the Nature Science Foundation of Hubei Province (2018CFB574),Director Fund of WNLO (2016).
文摘Among various photochromic compounds, diarylethenes (DAEs)have been widely studied and applied due to their excellent thermal bistability and fatigue resistance.Most researches are focused on the properties and applications of DAEs in solution.However, they meet the problem of fluorescence quenching at high concentration or at solid state which limits their performance in the practical applications.Fortunately,the DAE based photochromic aggregation-induced emission (AIE) materials do well in addressing this problem.This work here reviews the current research progress on the structures,properties and applications of the DAE based photochromic AIE materials and points out some existing problems so as to promote subsequent development of this field in the future.
基金Supported by the National Natural Science Foundation of China(51373072,21363009)the Project of Natural Science Foundation of Jiangxi Province(20142BAB203005)+2 种基金the Project of Science Funds of Jiangxi Education Office(KJLD12035)the Young scientist training program of Jiangxi(20153BCB23008)the PhD start-up fund of Jiangxi Science&Technology Normal University
文摘The photochromic title compound,C_(26)H_(18)F_6N_2OS_2,contains a 2,5-dimethylthiophene ring and a N-formyl aminoquinolinyl thiophene ring on the C=C double bond of the cyclopentene ring.The dihedral angles between the cyclopentene and attached N-formyl aminoquinolinyl thiophene ring and 2,5-dimethylthiophene ring are 63.0° and 137.1°,respectively.The dihedral angle between the thiophene ring and the adjacent aminoquinoline ring is 5.7°.The molecule adopts an antiparallel conformation,with a distance between the two photoreactive C atoms of 3.763 ?.In addition,the absorption and fluorescence spectral changes were measured in acetonitile and solid at room temperature,and the result showed that the title compound could undergo photochromic reaction in both states.
基金supported by the National Natural Science Foundation of China(22101263)the Postdoctoral Research Grant in Henan Province(202101002)Zhengzhou University。
基金supported by the National Natural Science Foundation of China(NSFC,52273206,52173278,and 51833011)Hunan Provincial Natural Science Foundation of China(2021JJ10029,2020JJ3021,and 2021JJ40192)+1 种基金the Open Fund of Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers(E22125)the Science and Technology Innovation Program of Hunan Province(2022RC1075 and 2021RC5028)。
基金Supported by the National Natural Science Key Foundation of China (Grant No. 20333080)National Natural Science General Foundations of China (Grant Nos. 20572059 and 20502013)+1 种基金Project of Development Plan of the State Key Fundamen-tal Research (Grant No. 2007CB808000)Beijing Key Lab Open Foundation at School of Printing and Packaging Engineering, Beijing Institution of Graphic Com-munication (Grant No. KF050302)
文摘Two novel diarylfuorocyclopentenes, which underwent gated photochromism, were synthesized. It was found that the photochromic property of these diarylethenes could be switched by alternative addition of acids/alkalis, which could provide a new design strategy toward chemical threshold photoreaction.
基金financially supported by the National Natural Science Foundation of China for Science Center Program (No. 21788102)Creative Research Groups (No. 21421004)+4 种基金Key Project (No. 21636002)Shanghai Pujiang Program (No. 20PJ1402900)National key Research and Development Program (No. 2016YFA0200300)Shanghai Municipal Science and Technology Major Project (No. 2018SHZDZX03)Program of Introducing Talents of Discipline to Universities (No. B16017)。
文摘The development of solid-state smart materials, in particular those showing photoresponsive luminescence, is highly desirable for their cutting edge applications in displays, sensors, data-storage, and anticounterfeiting. However, to achieve both excellent photoresponsive performance and bright luminescence in solid state remains challenge. Herein, we integrate a novel photochromic fluorophore YL into flexible polymer chains, thereby enabling the resultant polymer PYL with reversible photoisomerization upon aggregation. Remarkably, the polymer PYL possesses excellent photochromic properties and aggregationinduced emission(AIE) activity, which can be attributed to the photoactive YL moiety. Upon light exposure, its film exhibits reversibly off-to-on fluorescent modulation with quick response, high emission efficiency and signal contrast, sharply different from the weak emission in solution. The novel photoresponsive AIE polymer with invisible/visible color and fluorescence transformation allows for advanced anti-counterfeiting applications. This work provides an efficient platform for constructing solid-state photocontrollable luminescent materials.
基金the National Natural Science Foundation of China for the Science Center Program(21788102)the Creative Research Groups(21421004)and Key Project(21636002)+6 种基金the National Natural Science Foundation of China(21905091)the Shanghai Municipal Science and Technology Major Project(Grant 2018SHZDZX03)the Innovation Program of Shanghai Municipal Education CommissionScientific Committee of Shanghai(15XD1501400)the Program of Introducing Talents of Discipline to Universities(B16017)the Shanghai Pujiang Program(18PJ1402200)China Postdoctoral Science Foundation(2019M651418)。
文摘Spin-crossover(SCO)metal complexes are expected to be widely used in data storage materials,display devices and sensors.Although a lot of spin-crossover photoswitches have been developed,the reversible photomodulation cases that work at room temperature are limited.Herein,a novel cobalt complex o-1-Co(II)wherein the salen unit bridges with bis-diarylethene has been designed as switch to construct"off-on"logic operation at room temperature.The complex o-1-Co(II)displays an abrupt,reversible and hysteretic spin crossover(T1/2↓=166 K,T1/2↑=177 K,andΔT1/2=11 K)between the high-spin(HS)and low-spin(LS)states.Meanwhile,photocyclization of o-1-Co(II)with UV light produces a photoresponsive closed form c-1-Co(II),which always stays at low-spin without SCO at all.Moreover,the magnetic switching of the complex can also be achieved with redox reactions between Co(II)and Co(III).
基金supported financially by the National Natural Science Foundation of China(Nos.21302212 and 21522209)the "Strategic Priority Research Program"(No.XDB12010100)
文摘In recent years,organic field-effect transistors(OFETs) with high performance and novel multifunctionalities have attracted considerable attention.Meanwhile,featured with reversible photoisomerization and the corresponding variation in color,chemical/physical properties,photochromic molecules have been applied in sensors,photo-switches and memories.Incorporation of photochromic molecules to blend in the device functional layers or to modify the interfaces of OFETs is common way to build photo-transistors.In this review,we focus on the recent advantages on the study of photoresponsive transistors involving one of three typical photochromic compounds spiropyran,diarylethene and azobenzene.Three main strategies are demonstrated in detail.Firstly,photochromic molecules are doped in active layers or combined with semiconductor structure thus forming photoreversible active layers.Secondly,the modification of dielectric layer/active layer interface is mainly carried out by bilayer dielectric.Thirdly,the photo-isomerization of self-assembled monolayer(SAM) on the electrode/active layer interface can reversibly modulate the work functions and charge injection barrier,result in bifunctional OFETs.All in all,the combination of photochromic molecules and OFETs is an efficient way for the fabrication of organic photoelectric devices.Photoresponsive transistors consisted of photochromic molecules are potential candidate for real applications in the future.
