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Journal articles on the topic 'Photochromism'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Sun, Feng Xia, Sha Sha Wei, and Shou Zhi Pu. "Synthesis and Properties of 1-(2-methyl-5-chlorine-3-thienyl)-2-(2-ethyl-benzofuran-3-Yl) perfluorocyclopentene and Application." Advanced Materials Research 830 (October 2013): 274–77. http://dx.doi.org/10.4028/www.scientific.net/amr.830.274.

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A novel unsymmetrical photochromic diarylethene, 1-(2-methyl-5-chlor-ine-3-thienyl)-2-(2-ethyl-benzofuran-3-yl) perfluorocyclopentene (1a), was synthesized and its photochromism and photo-induced anisotropy was investigated. Specifically, photochromism in solution and in PMMA amorphous films were studied. The diarylethene showed exhibited reversible photochromism, changing from colorless to red after irradiation with UV light both in solution and in PMMA amorphous film. This new photochromic system also exhibited remarkable optical storage character.

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2

Xu, Hong Yan, Ren Jie Wang, and Shou Zhi Pu. "A Photochromic Diarylethene Bearing a Six-Membered Aryl Unit." Applied Mechanics and Materials 473 (December 2013): 93–96. http://dx.doi.org/10.4028/www.scientific.net/amm.473.93.

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A new unsymmetrical photochromic diarylethene compound1awas synthesized and its photochromism were investigated, such as photochromism and kinetics in solution. The compound exhibited good photochromism in solution with alternating irradiation by UV/Vis light, and the maxima absorption of its closed-ring isomer1bare 515nm. The open-ring isomer of the diarylethene1aexhibited relatively strong fluorescence at 424 nm when excited at 280 nm. Its fluorescence intensity decreased along with the photochromism from open-ring isomers to closed-ring isomers upon irradiation with 297 nm UV light.

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3

Zhao, Jianzhang, Bing Zhao, Weiqing Xu, and Juzheng Liu. "Direct Measurement of the Photochromism Kinetics of Salicylideneamines in Solid State." Journal of Chemical Research 2003, no. 5 (2003): 292–93. http://dx.doi.org/10.3184/030823403103173859.

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A method for the study of photochromism kinetics of salicylideneamines in the solid state with fluorescence changes as the probe was described. This can be used to quantitatively evaluate the photochromism of some solid photochromic materials.

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4

Rawat, M. S. M., Sudagar Mal, and Pramod Singh. "Photochromism in Anils - A Review." Open Chemistry Journal 2, no. 1 (2015): 7–19. http://dx.doi.org/10.2174/1874842201502010007.

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This review describes in brief the historical perspective of photochromism and photochromic behaviour of ‘Anils’. This phenomenon among ‘Anils’ is exhibited due to the tautomerism between enol and keto form via six membered hydrogen transfer between the phenolic hydrogen and imine nitrogen and show the phenomenon of solid-state photochromism and thermochromism and photochromism in rigid glassy solutions as well. Photochromic property in ‘Anils’ is a characteristic of the molecule, but their chromo behaviour is not only influenced by the crystal structure of anils but also by the substituents i

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5

Xu, Hong Yan, Hai Chang Ding, and Shou Zhi Pu. "Synthesis, Photochromism and Optical Storage of a Novel Diarylethene Compound." Advanced Materials Research 830 (October 2013): 294–97. http://dx.doi.org/10.4028/www.scientific.net/amr.830.294.

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A new unsymmetrical photochromic diarylethene 1a was synthesized and its photochromism were investigated. The compound exhibited good photochromism in solution with alternating irradiation by UV/Vis light, and the maxima absorption of its closed-ring isomer is 542 nm. The open-ring isomer exhibited relatively strong fluorescence at 420 nm. Its fluorescence intensity decreased along with the photochromism from open-ring isomer to closed-ring isomer upon irradiation with UV light.

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6

Liu, Hong Liang, Hong Jing Jia, and Shou Zhi Pu. "Synthesis and Property of 1-(2,4-dimethoxyl-5-pyrimidinyl)-2-[2-methyl-5-(2-fluorophenyl)-3-thienyl]perfluorocyclopentene." Applied Mechanics and Materials 468 (November 2013): 91–94. http://dx.doi.org/10.4028/www.scientific.net/amm.468.91.

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A novel photochromic diarylethene based on pyrimidine moiety was synthesized. Its properties, including photochromism and fluorescence were investigated in detail. The compound exhibited remarkable photochromism, changing from colorless to red after irradiation with UV light. The fluorescence had a remarkable initial increase with subsequent dramatic decrease with increasing concentration. The results indicated that the pyrimidine moiety played a very important role during the process of photochromic reaction for the diarylethene derivative.

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7

Liao, Guan Ming, Dan Dan Xue, Chun Hong Zheng, and Shou Zhi Pu. "Research on Photochromic Materials with Synthesis and Properties of 1-(3,5-Dimethyl-4-isoxazolyl)-2-[2-methyl-5-(p-ethoxyphenyl)-3-thienyl]perfluorocyclopentene." Advanced Materials Research 1003 (July 2014): 27–30. http://dx.doi.org/10.4028/www.scientific.net/amr.1003.27.

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An asymmetrical photochromic diarylethene 1-(3,5-Dimethyl-4-isoxazolyl)-2-[2-methyl-5-(p-ethoxyphenyl)-3-thienyl] perfluorocyclopentene (1o) was synthesized and its photochromic properties were investigated. Upon irradiation with 297 nm UV light, 1o exhibited photochromism in hexane solution. The kinetic experiments showed that the cyclization and cycloreversion processes were zeroth and first order reaction, respectively. Moreover, diarylethene 1o also exhibited obviously fluorescence switches along with the photochromism.

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8

Liu, Ming, Wei Li, Shou Zhi Pu, Gang Liu, and Shi Qiang Cui. "Synthesis, Properties and Application in Optical Memory of a New Photochromic Diarylethene." Key Engineering Materials 474-476 (April 2011): 1259–62. http://dx.doi.org/10.4028/www.scientific.net/kem.474-476.1259.

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A new photochromic diarylethene compound, 1-[2-methyl-3-benzothiophene]-2- [5-(3-chlorobenzene)-2-methyl-3-thienyl]perfluorocyclopentene(1a), was synthesized and its photochromism and photo-induced anisotropy was investigated. It showed good photochromism and functioned as an effective fluorescent photoswitch in solution. In hexane, the open-ring isomer of the diarylethene 1a exhibited relatively strong fluorescence at 417 nm when excited at 315 nm. In PMMA film, diarylethene 1a also showed good photochromism.

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9

Xue, Ya Ming, Feng Xia Sun, and Shou Zhi Pu. "Materials with Synthesis and Properties of Photochromic Diarylethene." Applied Mechanics and Materials 473 (December 2013): 89–92. http://dx.doi.org/10.4028/www.scientific.net/amm.473.89.

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An unsymmetrical photochromic diarylethene was synthesized and its photochromism properties were investigated in detail. The compound exhibited remarkable photochromism, changing from colorless to light pink after irradiation with 297 nm UV light, in which absorption maxima were observed at 498 nm in hexane and at 505 nm in PMMA amorphous films, respectively. The photochromic reaction kinetics was studied in solution and their cyclization/cycloreversion processes belong to zeroth/first order reaction in hexane.

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10

Tian, Zhao Yan, Shi Qiang Cui, and Shou Zhi Pu. "Synthesis, Photochromism and Fluorescent Switch of 1-(2-Methyl-1-Benzofuran-3-Yl)-2-(2-Methyl-5-(4-Benzylazide)-3-Thienyl)Perfluorocyclopentene." Applied Mechanics and Materials 662 (October 2014): 107–10. http://dx.doi.org/10.4028/www.scientific.net/amm.662.107.

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A photochromic diarylethene of 1-(2-methyl-1-benzofuran-3-yl)-2-(2-methyl-5-(4-benzylazide)-3-thienyl)) perfluorocyclopentene was synthesized and its properties such as photochromism and fluorescence in solution were investigated in detail. The diarylethene has shown good photochromic behavior in solution with alternating irradiation by UV/vis light. Its fluorescence intensity decreased along with the photochromism from open-ring isomers to closed-ring isomers upon irradiation with 297 nm UV light.

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11

Xue, Ya Ming, Ren Jie Wang, and Shou Zhi Pu. "Synthesis and Application of 1-[2-methyl-3-benzofuran]-2-[2-methyl-5-(4-pentylphenyl)-3-thienyl]perfluorocyclopentene." Applied Mechanics and Materials 707 (December 2014): 52–55. http://dx.doi.org/10.4028/www.scientific.net/amm.707.52.

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An unsymmetrical photochromic diarylethene1o, which is named 1-[2-methyl-3-benzofuran]-2-[2-methyl-5-(4-pentylphenyl)-3-thienyl] perfluorocyclopentene, has been synthesized, and its properties including photochromism and fluorescence have been investigated. The compound exhibited remarkable photochromism, changing from colorless to light pink after irradiation with 297 nm UV light. The photochromic reaction kinetics was studied in solution and their cyclization/cycloreversion processes belong to zeroth/first order reaction in acetonitrile.

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12

Liao, Guan Ming, Chun Hong Zheng, and Shou Zhi Pu. "Synthesis and Properties of 1-(2,4-Dimethyl-5-thiazolyl)-2-(2-methyl-5-(2-methyl)-3-thienyl)perfluorocyclopentene." Advanced Materials Research 952 (May 2014): 71–74. http://dx.doi.org/10.4028/www.scientific.net/amr.952.71.

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An asymmetrical photochromic diarylethene 1-(2,4-dimethyl-5-thiazolyl)-2-(2-methyl-5-(2-methyl)-3-thienyl) perfluorocyclopentene (1o) was synthesized and its photochromic properties were investigated. Upon irradiation with 297 nm UV light, 1o exhibited photochromism in solution and in PMMA film. The kinetic experiments showed that the cyclization and cycloreversion processes were zeroth and first order reaction, respectively. Moreover, diarylethene 1o also exhibited obviously fluorescence switches along with the photochromism.

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13

Liu, Ming, Gang Liu, Cong Bin Fan, and Shi Qiang Cui. "Synthesis and Fluorescence Switching of a Photochromic Diarylethene Bearing Chlorine Atoms." Advanced Materials Research 327 (September 2011): 27–30. http://dx.doi.org/10.4028/www.scientific.net/amr.327.27.

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A new photochromic diarylethene compound, 1-[2-methyl-5-(3-chlorophenyl) -3-thienyl]-2-[2-methyl-5-(2-pyridine)-3-thienyl]perfluorocyclopentene(1a) was synthesized. its photochromism was investigated. It exhibited good photochromism and functioned as an effective fluorescent photoswitch both in solution and in PMMA films.

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14

Tong, Zhi Peng, Shou Zhi Pu, and Shi Qiang Cui. "Photoinduced Anisotropy in a New Diarylethene Bearing Five and Six-Membered Aryl." Advanced Materials Research 490-495 (March 2012): 3387–90. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.3387.

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A new symmetrical photochromic diarylethene, 1-(2-methyl-5-formyl)-2-(2- cyanophenyl) perfluorocyclopentene(1a), was synthesized, and its photochromic properties were investigated in detail. The compound exhibited good photochromism both in solution and in PMMA film with alternating irradiation by UV/VIS light, and the maxima absorption of its closed-ring isomer 1b are 544 and 549 nm, respectively. The photochromism properties of 1a diarylethene show good photochromism in hexane and in PMMA amorphous film. Steady state fluorescence studies indicated that 1a diarylethene is higher fluorescent i

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15

Baggi, Giorgio, Lorenzo Casimiro, Massimo Baroncini, Serena Silvi, Alberto Credi, and Stephen J. Loeb. "Threading-gated photochromism in [2]pseudorotaxanes." Chemical Science 10, no. 19 (2019): 5104–13. http://dx.doi.org/10.1039/c9sc00913b.

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Photochromic axles bearing a bis(thienyl)ethene moiety exhibit threading-gated photochromism, where formation of a [2]pseudorotaxane with crown ether rings significantly enhances the photochromic properties of the axles.

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16

Yu, Tao, Depei Ou, Leyu Wang, et al. "A new approach to switchable photochromic materials by combining photochromism and piezochromism together in an AIE-active molecule." Materials Chemistry Frontiers 1, no. 9 (2017): 1900–1904. http://dx.doi.org/10.1039/c7qm00160f.

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17

Wang, Tao Feng, Gang Liu, Wei Jun Liu, and Shi Qiang Cui. "Synthesis of a Novel Photochromic Diarylethene for Polarization Optical Recording." Advanced Materials Research 396-398 (November 2011): 2357–60. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.2357.

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A novel unsymmetrical photochromic diarylethene compound bearing a benzofuran unit, 1-[2-methyl-5-formyl-3-thienyl]-2-[2-methyl-3-benzofuran-yl]perfluoroyclopentene(1a) have been synthesized, its photochromic, fluorescence and optical strorage properties were investigated. The compound exhibited obviously photochromism both in hexane and in PMMA film. In hexane, the fluorescence intensity of 1a declined along with the photochromism upon irradiation with 297 nm light. The results showed that the cyclization and cycloreversion process of the compound was determined to be the zeroth/first order r

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18

Cui, Shi Qiang, Yan Hua Yang, and Shou Zhi Pu. "Reaction Kinetics and Optical Storage Characters of a New Diarylethene Materials with Composite Properties." Advanced Materials Research 583 (October 2012): 105–8. http://dx.doi.org/10.4028/www.scientific.net/amr.583.105.

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Photochromism; Diarylethene materials; Fluorecence; Reaction kinetics. Abstract. A new unsymmetrical photochromic diarylethene, 1-(2-methyl-5-phenyl-3-thienyl)-2-[2-methyl-5-(4-formyl-phenyl)-3-thienyl]perfluorocyclopentene (1a), was synthesized, and its photochromic properties and reaction kinetics were investigated, respectively. The compound exhibited good photochromism both in solution and in PMMA film with alternating irradiation by UV/Vis light. The cyclization processes of compound 1a belong to the zeroth order reaction, while the cycloreversion processes belong to the first order react

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19

Duan, Fang, and Gang Liu. "Synthesis and Properties of 1-(2-Cyano-1,5-Dimethyl-4-Pyrryl)-2-{2-Methyl-[5-(4-Methylene-Hydroxyl)Phenyl]-3-Thienyl}Perfluorocyclopentene." Applied Mechanics and Materials 662 (October 2014): 83–86. http://dx.doi.org/10.4028/www.scientific.net/amm.662.83.

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A new asymmetrical photochromic diarylethene 1-(2-cyano-1,5-dimethyl-4-pyrryl)-2-{2-methyl-[5-(4-methylene-hydroxyl) phenyl]-3-thienyl} perflu-orocyclopentene (1o) was synthesized and its photochromic properties were investigated systematically. Upon irradiation with 297 nm UV light, 1o exhibited photochromism in acetonitrile solution and in a PMMA amorphous film. The kinetic experiments showed that the cyclization and cycloreversion processes were zeroth and first order reaction, respectively. In addition, diarylethene 1o also exhibited obvious fluorescence switches along with the photochromi

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20

Li, Xiao Ting, Hui Li, and Gang Liu. "Synthesis, Photochromism and Optical Recording Properties of a Diarylethene Materials Bearing an Isoxazole Unit." Advanced Materials Research 583 (October 2012): 125–29. http://dx.doi.org/10.4028/www.scientific.net/amr.583.125.

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A new unsymmetrical photochromic diarylethene, 1-(3,5-dimethyl-4-isoxazolyl)-2-[2-methyl-5-(4-formylphenyl)-3- thienyl]perfluorocyclopentene(1a) were synthesized, and its properties, such as photochromism and fluorescence properties, were investigated in detail. The results showed that this compound had good thermal stability and exhibited reversible photochromism, changing from colorless to darkred after irradiation with UV light both in solution and in PMMA amorphous film, the maxima absorption of its closed-ring isomer 1b are 529 nm and 541 nm respectively. The open-ring isomer of the diary

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21

Tong, Zhi Peng, Shou Zhi Pu, and Shi Qiang Cui. "A Photochromic Diarylethene with Five and Six-Membered Aryl Units." Advanced Materials Research 327 (September 2011): 37–40. http://dx.doi.org/10.4028/www.scientific.net/amr.327.37.

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A photochromic diarylethene bearing a six-membered aryl unit 1-[(2,5-dimethyl-3-thienyl)]-2-[2-methy-4-(3,5-difluorophenyl)-phenyl]perfluoroyclopentene (1a) was synthesized and its photochromic and fluorescent properties were also investigated in detail. The results showed that this compound exhibited reversible photochromism, changing from colorless to red after irradiation with UV light, in which absorption maxima were observed at 521 and 536nm in hexane and PMMA film, respectively. The fluorescence intensity decreased along with the photochromism upon irradiation with 297 nm light in hexane

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22

Ding, Hai Chang, Chun Hong Zheng, and Shou Zhi Pu. "Properties and Synthesis of a Novel Unsymmetrical Photochromic Diarylethene Functional Material." Applied Mechanics and Materials 164 (April 2012): 259–62. http://dx.doi.org/10.4028/www.scientific.net/amm.164.259.

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A new unsymmetrical photochromic diarylethene, 1-(3-thienyl)-2-(2- n-butyl-5-hydroxymethyl-3-thienyl) perfluoroncyclopentene (1a), was synthesized and its optoelectronic properties, such as photochromism and fluorescence in solution and in PMMA film were investigated. This compound exhibited remarkable photochromism, changing from colorless to pink after irradiation with UV light in hexane solution. The new diarylethene also exhibited relatively strong fluorescence by photoirradiation in solution and in PMMA film, and the fluorescence intensity decreased along with the photochromism upon irrad

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23

Ma, Le Le, Hong Yan Xu, and Gang Liu. "Research on Photochromic Materials with Synthesis and Application of 1-(2-methyl-3-benzothienyl)-2-[2-methyl-(5-ethynyl)trimethylsilane-3-thienyl] Perfluorocyclopentene." Advanced Materials Research 1003 (July 2014): 35–38. http://dx.doi.org/10.4028/www.scientific.net/amr.1003.35.

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A new unsymmetrical photochromic diarylethene compound, 1-(2-methyl-3-benzothienyl)-2-(2-methyl-(5-ethynyl) trimethylsilane-3-thienyl) perfluorocyclopentene (1o) has been synthesized, and its optoelectronic properties, such as photochromism and the fluorescence spectra of diarylethene 1o in hexane solution was investigated. The results showed that this compound exhibited reversible photochromism in solution. The maxima absorption of compound closed-ring isomer 1c are 538 nm. Its fluorescence intensity decreased along with the photochromism from open-ring isomers to closed-ring isomers upon irr

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24

Xu, Hong Yan, Le Le Ma, and Shou Zhi Pu. "Efficient Synthesis, Photochromism and Fluorescence Properties of a Novel Diarylethene Bearing a Naphthalene." Advanced Materials Research 1003 (July 2014): 59–62. http://dx.doi.org/10.4028/www.scientific.net/amr.1003.59.

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A new unsymmetrical photochromic diarylethene compound 1a was synthesized and its photochromism were investigated. The compound exhibited good photochromism in solution and PMMA films with alternating irradiation by UV/Vis light, and the maxima absorption of its closed-ring isomer (1b) are 536 nm in hexane and 552 nm in PMMA films. The open-ring isomer of the diarylethene 1a exhibited relatively strong fluorescence at 441 nm when excited at 290 nm. Its fluorescence intensity decreased along with the photochromism from open-ring isomers to closed-ring isomers upon irradiation with 297 nm UV lig

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25

Wang, Tao Feng, Shou Zhi Pu, and Shi Qiang Cui. "Synthesis and Property of a Novel Diarylethene Based on Benzofuran and Thienyl Units for Polarization Optical Recording." Key Engineering Materials 474-476 (April 2011): 1561–64. http://dx.doi.org/10.4028/www.scientific.net/kem.474-476.1561.

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A new photochromic diarylethene of bis(3-methyl-2-thienyl)ethene and bis(2-methyl-3- benzofuran)ethene was synthesized. Its photochromic, fluorescent and optical strorage properties were investigated. The compounds exhibited remarkable photochromism both in solution and in PMMA film. In hexane, the open-ring isomer of the diarylethene 1 exhibited relatively strong and clear fluorescent switches when excited at 270 nm. The fluorescence intensity declined along with the photochromism upon irradiation with 297 nm light. The results showed that the cyclization/cycloreversion process of the compoun

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26

Liu, Ming, Gang Liu, and Shi Qiang Cui. "Synthesis and Fluorescence Switching of a New Purple Photochromic Diarylethene." Advanced Materials Research 399-401 (November 2011): 900–903. http://dx.doi.org/10.4028/www.scientific.net/amr.399-401.900.

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A novel photochromic diarylethene was synthesized and its photochromism, fluorescence properties have been investigated. It underwent reversible cyclization and cycloreversion reactions upon alternating irradiation with UV and visible light in hexane. The results showed that this compound exhibited reversible photochromism and good fluorescent switching in solution and in PMMA upon irradiation with UV light and visible light.

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27

Li, Hui, Yuan Ming Tu, and Gang Liu. "Synthesis and Properties of a New Diarylethene Bearing Isoxazole Moieties." Advanced Materials Research 763 (September 2013): 69–73. http://dx.doi.org/10.4028/www.scientific.net/amr.763.69.

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A new unsymmetrical photochromic diarylethene bearing an isoxazole moiety was developed, and its properties, including photochromism, photochromic reaction kinetics, and fluorescence properties were investigated systematically. The compound exhibited remarkable photochromism and functioned as a fluorescent photoswitch both in solution and in PMMA films. The results illustrated that the cyclization processes of diarylethene 1 belong to the zeroth order reaction when open-ring isomers changed to closed-ring isomers and the cycloreversion process belong to the first order reaction. Inaddition, us

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28

Liu, Hong Liang, Gang Liu, Shi Qiang Cui, and Wei Jun Liu. "Efficient Synthesis and Properties of a Photochromic Diarylethene Bearing Thiophene and Isoxazole Moieties." Advanced Materials Research 295-297 (July 2011): 1070–73. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.1070.

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A novel photochromic diarylethene based on isoxazole moiety was synthesized and its photochromic and fluorescent properties were also investigated. This compound exhibited reversible photochromism, changing from colorless to red 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. The results showed that the diarylethene exhibited a relatively strong fluorescence switch along with the photochromism from open-ring isomer to closed-ring isomer. Using this dithienylethene 1c

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29

Li, Hui, Yong Liang Xia, Shou Zhi Pu, and Shi Qiang Cui. "Synthesis of a Photochromic Diarylethene Having Thiazole and a Pyridyl Group for Optical Recording." Advanced Materials Research 156-157 (October 2010): 650–54. http://dx.doi.org/10.4028/www.scientific.net/amr.156-157.650.

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A new unsymmetrical photochromic diarylethene namly 1-(2,4-dimethyl-5- thiazolyl)-2- [(2-methyl-5-(2-pyridyl)-3-thienyl)]perfluorocyclopentene was synthesized, and its photochromic and fluorescent properties were also investigated. The compound exhibited good photochromism both in solution and in PMMA film. In PMMA film, The open-ring isomer of the diarylethene 1 exhibited relatively strong fluorescence at 427 nm when excited at 320 nm. The fluorescence intensity declined along with the photochromism upon irradiation with 297 nm light. Using this dithienylethene 1b as optical storage was perfo

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30

Wang, Hai Bo, Cong Bin Fan, and Gang Liu. "Study on Photochromic Perfluorocyclopetene Containing Six-Numbered Unit as Optical Recording Materials." Applied Mechanics and Materials 327 (June 2013): 58–62. http://dx.doi.org/10.4028/www.scientific.net/amm.327.58.

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A reversible molecule switching of symmetrical photochromic diarylethene 1,2-bis methyl phenyl perfluorocyclopentene has been synthesized and its photochromic and simulated molecule structure were also investigated. The compound exhibited photochromism both in solution and PMMA film but no photochromism in solid state. In hexane, the open-ring isomer of the diarylethene1oshowing an absorption peak at 308 nm. Upon irradiation with 313 nm light, a new absorption band in the visible region centered at 595 nm emerged to form closed isomer1c. This compound can be used as optical recording materials

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31

Xia, Shui Jun, Xiao Rong Dong, and Gang Liu. "Efficient Synthesis, Photochromism and Fluorescence Properties of a Novel Diarylethene Bearing a Fluorene." Advanced Materials Research 1003 (July 2014): 51–54. http://dx.doi.org/10.4028/www.scientific.net/amr.1003.51.

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A new symmetrical photochromic diarylethene, 1,2-bis-[2-methyl-5-(9,9-dibutyl-9H-fluorene) -3-thienyl] perfluorocyclopentene (1a), was synthesized and its optoelectronic properties, such as photochromism in solution and fluorescence were investigated. The photochromic reaction kinetics indicated that the cyclization processes of 1a belong to the zeroth order reaction and the cycloreversion process belong to the first order reaction. The new diarylethene also exhibited relatively strong fluorescence by photoirradiation in solution and the fluorescence intensity decreased along with the photochr

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32

Xue, Dan Dan, Guan Ming Liao, Chun Hong Zheng, and Shou Zhi Pu. "Research on Photochromic Compounds with Synthesis and Photochromism of 1-(2-methyl-3-benzofuryl)-2-{2-methyl-5-[4-formyloxyethyl (Rhodamine-B)] phenyl-3-thienyl} Perfluoroyclopentene." Advanced Materials Research 1003 (July 2014): 55–58. http://dx.doi.org/10.4028/www.scientific.net/amr.1003.55.

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A new photochromic diarylethene compound bearing a rhodamine B unit, 1-(2-methyl-3-benzofuryl)-2-{2-methyl-5-[4-formyloxyethyl (rhodamine-B)] phenyl-3-thienyl} perfluorocyclopentene (1o) was synthesized, and its photochromic properties such as photochromism in solution as well as in a polymethylmethacrylate (PMMA) amorphous film were investigated specfically. 1o exhibits good photochromism upon alternating irradiation with UV light and visible light (> 510 nm) in hexane and a PMMA film. The kinetic experiments showed that the cyclization and cycloreversion processes were zeroth and first or

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33

Li, Gang, Gang Liu, and Shou Zhi Pu. "Synthesis and Application of 1-(2-methyl-3-benzothienyl)-2-[3-methyl-2-thienyl]perfluorocyclopentene." Advanced Materials Research 1078 (December 2014): 102–5. http://dx.doi.org/10.4028/www.scientific.net/amr.1078.102.

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A novel unsymmetrical photochromic diarylethene compound 1-(2-methyl-3-benzothienyl)-2-[3-methyl-2-thienyl] perfluorocyclopentene was designed and constructed successfully. Its optoelectronic properties have been discussed systematically, such as photochromic, fluorescence switch, kinetics experiments in hexane solution and PMMA. The consequences showed that this compound exhibited good reversible photochromism. The maxima absorption of compound closed-ring isomer 1c is 468nm. Upon irradiation with 297nm UV light, Its fluorescence intensity decreased along with the photochromism from open-ring

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Ma, Le Le, Hong Yan Xu, Qing Zhang, and Gang Liu. "Synthesis and Application of 1-[2-methyl-5-(4-hydroxymethylphenyl)-3-thienyl]-2-[2-methyl-5-(4-azidomethylphenyl)-3-thienyl]perfluorocyclopentene." Advanced Materials Research 1078 (December 2014): 110–13. http://dx.doi.org/10.4028/www.scientific.net/amr.1078.110.

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A new fluorescent switch based on a photochromic diarylethene, 1-[2-methyl-5-(4-hydroxymethylphenyl)-3-thienyl]-2-[2-methyl-5-(4-azidomethylphenyl)-3-thienyl] perfluorocyclopentene has been synthesized, And its properties have been discussed systematically in acetonitrile solution and in PMMA, such as photochromic, fluorescence switch and kinetics experiments, and its optoelectronic properties, The results showed that this compound exhibited reversible photochromism and the maxima absorption of compound closed-ring isomer 1c is 590 nm. Its fluorescence intensity decreased along with the photoc

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35

Cai, Mei Li, Zhao Yan Tian, Shi Qiang Cui, and Shou Zhi Pu. "Synthesis and Properties of 1-(3,5-dimethyl-4-isoxazole)-2-(2-methyl-(5-ethynyl)-3-thienyl)perfluorocyclopentene." Advanced Materials Research 1078 (December 2014): 82–85. http://dx.doi.org/10.4028/www.scientific.net/amr.1078.82.

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A new photochromic diarylethene of 1-(3,5-dimethyl-4-isoxazole)-2- (2-methyl-(5-ethynyl)-3-thienyl) perfluorocyclopentene (1o) was synthesized. Its photochromic and fluorescence properties were investigated systematically. Upon irradiation with UV light with the extended response time, the diarylethene underwent a ring opening reaction to produce closed forms and color change in solution. The results showed the compound exhibited good photochromism in hexane solution. The kinetic experiments showed that the cyclization and cycloreversion processes were zeroth and first order reaction, respecti

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Li, Ruiji, Bingzhao Mou, Mihoko Yamada, Wei Li, Takuya Nakashima, and Tsuyoshi Kawai. "From Visible to Near–Infrared Light–Triggered Photochromism: Negative Photochromism." Molecules 29, no. 1 (2023): 155. http://dx.doi.org/10.3390/molecules29010155.

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Photochromic compounds, whose key molecular properties can be effectively modulated by light irradiation, have attracted significant attention for their potential applications in various research fields. The restriction of photoisomerization coloration induced by ultraviolet light limits their applications in the biomedical field and some other fields. Negative photochromism, wherein a relatively stable colored isomer transforms to a colorless metastable isomer under low–energy light irradiation, offers advantages in applications within materials science and life science. This review provides

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Johmoto, Kohei, Hidehiro Uekusa, Yuji Kikuchi, Hiroki Takahagi, Kosuke Ono, and Nobuharu Iwasawa. "Photochromism change by conformation control in macrocyclic boronic ester cavity." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C654. http://dx.doi.org/10.1107/s2053273314093450.

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N-salicylideneaniline derivatives are known to show photochromism by UV light, and it depends on the molecular conformation in the crystal. The twisted molecule is photochromic but the planar one is not[1,2]. N-salicylidene-2-aminopyridine (2SAP) always has a planar conformation due to the chemical structure without steric hindrance, therefore 2SAP is known as non-photochromic. However, by confining the molecule in a cavity of the macrocyclic boronic ester 1[3], the conformation and photochromism can be controlled. The inclusion crystal of 1 (homo-parallel form) has a special feature to have a

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Liu, Ming, Ren Jie Wang, and Gang Liu. "Synthesis, Properties and Application in Optical Memory of a Photochromic Diarylethene Based on Benzene Ring." Advanced Materials Research 295-297 (July 2011): 224–27. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.224.

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A new photochromic diarylethene compound, 1-(2-methyl-5-(2,4-difluorophenyl)-3-thienyl)-2-(2-cyanophenyl)perfluorocyclopentene (1a), was synthesized and its photochromism and photo-induced anisotropy was investigated. The results showed that this compound exhibited reversible photochromism, changing from colorless to purple after irradiation with UV light both in solution and in PMMA amorphous film. In hexane, the open-ring isomer of the diarylethene 1a exhibited relatively strong fluorescence at 459 nm when excited at 316 nm. The fluorescence intensity decreased along with the photochromism u

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Ma, Le Le, Hong Yan Xu, and Shou Zhi Pu. "Synthesis and Photochromism of 1-(2-methyl-1-benzothiophene)-2-(2-methyl-5-aminomethane-3-thienyl)perfluorocyclopentene." Advanced Materials Research 886 (January 2014): 168–71. http://dx.doi.org/10.4028/www.scientific.net/amr.886.168.

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A new unsymmetrical photochromic diarylethene 1-(2-methyl-3-benzothiophene)-2-(2-methyl-5-aminomethane-3-thienyl) perfluorocyclopentene was synthesized and its optoelectronic properties, such as photochromism and the fluorescence spectra of diarylethene1oin acetonitrile solution was investigated. The compound exhibited good photochromism in solution with alternating irradiation by UV/Vis light, and the maxima absorption of its closed-ring isomer1care 530 nm. The open-ring isomer of the diarylethene1oexhibited relatively strong fluorescence at 375 nm. Its fluorescence intensity decreased along

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Li, Hui, Shou Zhi Pu, and Shi Qiang Cui. "Synthesis and Optical Property of an Asymmetric Photochromic Diarylethene Derivative Bearing Benzofuran." Advanced Materials Research 399-401 (November 2011): 1115–18. http://dx.doi.org/10.4028/www.scientific.net/amr.399-401.1115.

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A new asymmetric photochromic diarylethene bearing a benzofuran unit was synthesized, namely [1-(2-methyl-3-benzofuranyl)-2-(2-methoxyphenyl)]perﬂuorocyclopentene (1o). Its photochromic and fluorescent properties were investigated, respectively. The compound exhibited reversible photochromism, changing from colorless to red upon irradiation with UV light both in solution and in PMMA film. The diarylethene exhibited relatively strong fluorescence at 410 nm in hexane solution and 462 nm in PMMA amorphous film when excited at 300 and 385 nm, respectively. The fluorescence intensity decreased alon

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Tian, Zhao Yan, Shi Qiang Cui, and Shou Zhi Pu. "Synthesis and Properties of [1-(3,5-dimethyl-4-iodoisoxazole)-2-(2-methyl-(5-ethynyl)trimethylsilane-3-thienyl)perfluorocyclopentene." Applied Mechanics and Materials 707 (December 2014): 44–47. http://dx.doi.org/10.4028/www.scientific.net/amm.707.44.

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A photochromic diarylethene of [1-(3,5-dimethyl-4-iodoisoxazole)-2-(2-methyl-(5-ethynyl) trimethylsilane-3-thienyl) perfluorocyclopentene (1o) was synthesized and characterized. Its properties, including photochromic behavior and fluorescent properties have been investigated. Upon irradiation with UV light with the extended response time, the diarylethene underwent a ring opening reaction to produce closed forms and color change in solution. The results showed the compound exhibited good photochromism in acetonitrile solution. The kinetic experiments showed that the cyclization and cyclorevers

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Liu, Hong Liang, Shou Zhi Pu, Wei Jun Liu, and Shi Qiang Cui. "A Novel Photochromic Diarylethene Based on Thiophene and Isoxazole Moieties for Optical Recording." Advanced Materials Research 239-242 (May 2011): 3290–93. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.3290.

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A novel photochromic diarylethene based on isoxazole moiety was synthesized and its photochromic and fluorescent properties were also investigated. It underwent reversible cyclization and cycloreversion reactions upon alternating irradiation with UV and visible light in hexane and in PMMA film. The compound exhibited remarkable photochromism, changing from colorless to purple after irradiation with UV light. When irradiation with UV light, the fluorescence intensity declined remarkably. The results showed that the diarylethene exhibited a relatively strong fluorescence switch along with the ph

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Tang, Xu Gang, Hong Jing Jia, and Shou Zhi Pu. "Synthesis and Photochromism Studies of 1-(2,4-dimethoxyl-5-pyrimidinyl)-2-[2-methyl-5-(2-methoxyphenyl)-3-thienyl]perfluorocyclopentene." Applied Mechanics and Materials 468 (November 2013): 83–86. http://dx.doi.org/10.4028/www.scientific.net/amm.468.83.

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A novel photochromic diarylethene bearing a pyrimidine unit as one aryl moiety has been synthesized. The compound exhibited remarkable photochromism, changing from colorless to violet after irradiation with UV light. When irradiated with UV light, the compound exhibited a relatively strong fluorescence switch along with the photochromism from open-ring isomer to closed-ring isomer. Using this diarylethene as optical storage was performed successfully.

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Bouas-Laurent, Henri, and Heinz Dürr. "Organic photochromism (IUPAC Technical Report)." Pure and Applied Chemistry 73, no. 4 (2001): 639–65. http://dx.doi.org/10.1351/pac200173040639.

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This technical report is a general introduction to organic photochromism. The definition of photochromism (PC) is given together with that of words with the ending "chromism", such as thermo-, electro-, piezo-, and tribochromism. Important concepts such as two-photon, gated, dual-mode PC and chirochromism are illustrated. The concept of fatigue (chemical degradation) and the determination of the main photochromic parameters (number of cycles, cyclability, half-life), and the spectrokinetic and mechanistic aspects are discussed. The main families of PC (organic compounds and biological receptor

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Ma, Le Le, and Gang Liu. "Synthesis and Properties of 1,2-Bis[2-Methyl-5-(9,9-Dihexyl-Fluorene)-3-Thienyl]Perfluorocyclopentene." Applied Mechanics and Materials 662 (October 2014): 103–6. http://dx.doi.org/10.4028/www.scientific.net/amm.662.103.

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A new symmetrical photochromic diarylethene 1,2-bis [2-methyl-5-(9,9-dihexyl-fluorene)-3-thienyl] perfluorocyclopentene (1o) has been synthesized, and its optoelectronic properties, such as photochromism and the fluorescence spectra of diarylethene 1o in acetonitrile solution was investigated. The maxima absorption of compound closed-ring isomer 1c is 619 nm. The open-ring isomer of the diarylethene 1o exhibited fluorescence at 390 nm. Its fluorescence intensity decreased along with the photochromism from open-ring isomers to closed-ring isomers upon irradiation with 297 nm UV light,The result

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Sun, Feng Xia, Shou Zhi Pu, and Shi Qiang Cui. "Study on Photochromic Materials with Synthesis, Properties and Application of Photochromic Diarylethene Bearing Fluorine Atoms." Applied Mechanics and Materials 327 (June 2013): 73–77. http://dx.doi.org/10.4028/www.scientific.net/amm.327.73.

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A novel unsymmetrical photochromic diarylethene, 1-[2-methyl-5-(3,5-difluorophenyl)- 3-thienyl]-2-(2-methyl-5-formyl-3-thienyl) perfluorocyclopentene (1) has been synthesized. Its photochromic and properties have been investigated in detail. Specifically, photochromism in solution and in polymethylmethacrylate (PMMA) amorphous films were studied. The results showed that this compound exhibited reversible photochromism, changing from colorless to blue after irradiation with UV light both in solution and in PMMA amorphous film. The photochromic reaction kinetics indicated that the cyclization pr

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47

Xue, Dan Dan, Zhi Yuan Sun, and Shou Zhi Pu. "Photochromism, Kinetics and Fluorescence of 1-(2-methyl-3-benzofuranyl)-2-[2-methyl-5-(4-cyanophenyl)-3-thienyl]perfluorocyclopentene." Advanced Materials Research 886 (January 2014): 175–78. http://dx.doi.org/10.4028/www.scientific.net/amr.886.175.

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An unsymmetrical photochromic diarylethene compound, 1-(2-methyl-3-benzofuranyl)-2-[2-methyl-5-(4-cyanophenyl)-3-thienyperfluorocyclopentene was synthesized, and its photochromic properties, kinetics of the photochromic cyclization/cycloreversion and fluorescence were investigated in detail. The compound exhibited good photochromism, changing from colorless to red after irradiation with 297 nm UV light, in which absorption maxima were observed at 530 nm in hexane solution. Simultaneously, cyclization/cycloreversion kinetics of this diarylethene was researched. The open-ring isomer of the diary

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Wang, Tao Feng, Gang Liu, and Shi Qiang Cui. "Efficient Synthesis of a New Unsymmetrical Photochromic Diarylethene for Optical Recording Storage." Advanced Materials Research 455-456 (January 2012): 37–40. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.37.

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A new photochromic diarylethene 1a has been synthesized, and its photochromic, fluorescent and optical recording strorage properties were investigated. The compound exhibited remarkable photochromism and clear fluorescent switches both in solution and in PMMA film. This new photochromic system also exhibited remarkable optical recording storage character.

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Pu, Shou Zhi, Ren Jie Wang, Hong Ying Xia, and Gang Liu. "Synthesis, Kinetics and Electrochemical Properties of a New Photochromic Diarylethene." Key Engineering Materials 474-476 (April 2011): 1543–46. http://dx.doi.org/10.4028/www.scientific.net/kem.474-476.1543.

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A new unsymmetrical photochromic diarylethene [1-(2-methyl-5-(3-methoxyphenyl)-3-thienyl), 2-(2-methyl-3-benzothienyl)] perfluorocyclopentene (1a), was synthesized, and its photochromic properties such as photochromism, kinetics and electrochemical properties were investigated in detail. The results showed that the compound exhibited excellent photochromism both in solution and in PMMA film with alternating irradiation by UV/Vis light. The kinetic and electrochemical experiments indicated that the cyclization/cycloreversion process of the compound was determined to be the zeroth/first order re

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He, Shang Hua, Gang Liu, and Ren Jie Wang. "A New Photochromic Diarylethene for Reversible Molecule Switching Properties Based on Pyrrole and Thiophene." Advanced Materials Research 284-286 (July 2011): 2239–42. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.2239.

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A new unsymmetrical photochromic diarylethene bearing a pyrrole and a thiophene aryl unit 1-(5-cyan-1,2-dimethylpyrrole)-2-(5-aldehyde-2-butylthiophene) perfluorocyclopentene(1a) has been synthesized. Its properties, including photochromism and kinetics were investigated in detail. It underwent reversible cyclization and cycloreversion reactions upon alternating with UV and visible light both in solution and in PMMA film. The results showed that this compound exhibited reversible photochromism, changing from colorless to blue upon irradiation with UV light, in which absorption maximum were obs

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