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Journal articles on the topic 'Photochemical isomerization'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Goncharov, Yevhen, Fedir Gladkiy, Alina Abu Sheiba, and Vladislava Sklyar. "PHOTOCHEMICAL ISOMERIZATION OF OLEFINS." Bulletin of the National Technical University "KhPI". Series: Innovation researches in students’ scientific work, no. 21 (October 3, 2019): 57–61. http://dx.doi.org/10.20998/2220-4784.2019.21.09.

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2

Huang, Mouxin, Long Zhang, Tianrun Pan, and Sanzhong Luo. "Deracemization through photochemical E / Z isomerization of enamines." Science 375, no. 6583 (2022): 869–74. http://dx.doi.org/10.1126/science.abl4922.

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Catalytic deracemization of α-branched aldehydes is a direct strategy to construct enantiopure α-tertiary carbonyls, which are essential to pharmaceutical applications. Here, we report a photochemical E / Z isomerization strategy for the deracemization of α-branched aldehydes by using simple aminocatalysts and readily available photosensitizers. A variety of racemic α-branched aldehydes could be directly transformed into either enantiomer with high selectivity. Rapid photodynamic E / Z isomerization and highly stereospecific iminium/enamine tautomerization are two key factors that underlie the

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3

D’Auria, Maurizio. "The photochemical isomerization 2-furylidenetetralone." Journal of Photochemistry and Photobiology A: Chemistry 390 (March 2020): 112332. http://dx.doi.org/10.1016/j.jphotochem.2019.112332.

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4

Frigerio, Alberto, Alba Pusino, and Carlo Gessa. "Photochemical isomerization of fluazifop-butyl." Pesticide Science 21, no. 3 (1987): 175–79. http://dx.doi.org/10.1002/ps.2780210303.

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5

Sandorfy, C., and D. Vocelle. "The photochemical event in rhodopsins." Canadian Journal of Chemistry 64, no. 12 (1986): 2251–66. http://dx.doi.org/10.1139/v86-371.

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The photochemical step in the functioning of visual and bacterial rhodopsins entails cis–trans or trans–cis isomerization and changes in the state of protonation of the retinylidene Schiff base chromophore. In this review our present knowledge on these two events is discussed as well as the role of interactions between the chromophore and the surrounding protein, opsin. The relation between protonation and hydrogen bonding at the Schiff base nitrogen, the problems of stabilization of the proton bridge and charge separation are also discussed. A new proposal is made which implies Schiff base to

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6

Rajakumar, Perumal, Beeran Senthilkumar, and Kannupal Srinivasan. "Synthesis of Azobenzenophanes with a Large Molecular Cavity." Australian Journal of Chemistry 59, no. 1 (2006): 75. http://dx.doi.org/10.1071/ch05254.

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The design and synthesis of four large-cavity azobenzenophanes, capable of forming photochemically controllable complexes with organic guest molecules, are described. These azobenzenophanes, possessing m-terphenyl, aromatic carbonyl, and chiral BINOL spacers, were synthesized from the corresponding bisphenols and dibromides using simple O-alkylation methodology. A preliminary photochemical study was carried out on the aromatic carbonyl spacer containing azobenzenophane, and the isosbestic points for the cis–trans isomerization process appeared at 319 and 419 nm.

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7

Maguire, R. James. "Chemical and photochemical isomerization of deltamethrin." Journal of Agricultural and Food Chemistry 38, no. 7 (1990): 1613–17. http://dx.doi.org/10.1021/jf00097a039.

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8

Bussotti, Laura, Ivo Cacelli, Maurizio D'Auria, et al. "Photochemical Isomerization of Colchicine and Thiocolchicine." Journal of Physical Chemistry A 107, no. 43 (2003): 9079–85. http://dx.doi.org/10.1021/jp035507l.

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9

Kirilyuk, I. A., I. A. Grigor'ev, O. P. Petrenko, and L. B. Volodarsky. "Photochemical isomerization of 2H-imidazoleN-oxides." Russian Chemical Bulletin 42, no. 12 (1993): 2009–13. http://dx.doi.org/10.1007/bf00698885.

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10

Su, Ming-Der. "A model study on the photochemical isomerization of isothiazoles and thiazoles." Phys. Chem. Chem. Phys. 16, no. 32 (2014): 17030–42. http://dx.doi.org/10.1039/c4cp01895h.

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11

Tavakoli, Amirrasoul, and Jung-Hyun Min. "Photochemical modifications for DNA/RNA oligonucleotides." RSC Advances 12, no. 11 (2022): 6484–507. http://dx.doi.org/10.1039/d1ra05951c.

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Photoconvertible groups (PG) can be incorporated into an oligonucleotide to undergo various irreversible and reversible light-induced reactions such as cleavage, crosslinking, isomerization, and intramolecular cyclization reactions.

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12

Mattioli, Roberto, Daniel Di Risola, Rodolfo Federico, et al. "Effect of Natural Deep Eutectic Solvents on trans-Resveratrol Photo-Chemical Induced Isomerization and 2,4,6-Trihydroxyphenanthrene Electro-Cyclic Formation." Molecules 27, no. 7 (2022): 2348. http://dx.doi.org/10.3390/molecules27072348.

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trans-Resveratrol is a natural bioactive compound with well-recognized health promoting effects. When exposed to UV light, this compound can undergo a photochemically induced trans/cis isomerization and a 6π electrochemical cyclization with the subsequent formation of 2,4,6-trihydroxyphenanthrene (THP). THP is a potentially harmful compound which can exert genotoxic effects. In this work we improved the chromatographic separation and determination of the two resveratrol isomers and of THP by using a non-commercial pentafluorophenyl stationary phase. We assessed the effect of natural deep eutec

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13

Martínez-Abadía, M., S. Varghese, R. Giménez, and M. B. Ros. "Multiresponsive luminescent dicyanodistyrylbenzenes and their photochemistry in solution and in bulk." Journal of Materials Chemistry C 4, no. 14 (2016): 2886–93. http://dx.doi.org/10.1039/c5tc02852c.

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14

Saini, Praveen, та Anjan Chattopadhyay. "A comprehensive spectroscopic investigation of α-(2-naphthyl)-N-methylnitrone: a computational study on photochemical nitrone–oxaziridine conversion and thermal E–Z isomerization processes". RSC Advances 5, № 28 (2015): 22148–59. http://dx.doi.org/10.1039/c4ra16375c.

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15

Ferrer, Íngrid, Xavier Fontrodona, Montserrat Rodríguez, and Isabel Romero. "Ru(ii)-dmso complexes containing azole-based ligands: synthesis, linkage isomerism and catalytic behaviour." Dalton Transactions 45, no. 7 (2016): 3163–74. http://dx.doi.org/10.1039/c5dt04376j.

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Photochemical ligand substitution in acetonitrile and chloroform, together with the kinetics of dmso linkage isomerization, are investigated in new Ru(ii)-dmso complexes that are also active as nitrile hydration catalysts.

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16

Becker, HD, BW Skelton, and AH White. "Molecular Topology of Linked Anthracenes: X-Ray Structure Analyses of Alkyl Di-9-anthryl-glycolates, 9-Anthryl 9-Anthrylmethyl Ethers and Their Photoisomers." Australian Journal of Chemistry 42, no. 11 (1989): 1869. http://dx.doi.org/10.1071/ch9891869.

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The molecular structures of ethyl di-9-anthrylglycolate (1) and methyl di-9-anthrylglycolate (2), as well as those of three isomerization products of (2), have been established by single-crystal X-ray diffraction studies. In both (1) and (2), the anthracenemoieties are characterized by marked deviations from planarity. The stereospecific course of the thermal and photochemical isomerization of (2) by Diels -Alder reaction is suggested to be governed by the spatial demand of the alkoxycarbonyl group. Base-catalysed isomerization of (2) by migration of 9-anthryl from carbon to oxygen is associat

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17

Kim, Maeng Sup, Ki Taek Lee, Bong Mo Jeong, Bok Hee Lee, and Sang Chul Shim. "PHOTOCHEMICAL trans →cis ISOMERIZATION OF 6-STYRYLQUINOXALINE." Photochemistry and Photobiology 54, no. 4 (1991): 517–24. http://dx.doi.org/10.1111/j.1751-1097.1991.tb02051.x.

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18

Mochida, Kunio, Chikako Nohara, Takashi Ohhori, Masahiro Kako, and Yasuhiro Nakadaira. "Photochemical Isomerization of 1-Germa-2,4-cyclohexadienes." Chemistry Letters 23, no. 10 (1994): 1961–62. http://dx.doi.org/10.1246/cl.1994.1961.

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19

Ikuo, Akira, Kenichiro Otani, Tamiko Chijimatsu, Jun Uzawa, Katsutosi Yasufuku, and Shousuke Teratani. "Photochemical Isomerization oftrans-Dichlorotetrakis(dimethylphenylphosphine)osmium(II)." Chemistry Letters 28, no. 2 (1999): 185–86. http://dx.doi.org/10.1246/cl.1999.185.

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20

Maier, Guenther, Hans Peter Reisenauer, Jiani Hu, L. J. Schaad, and B. Andes Hess. "Photochemical isomerization of dihalomethanes in argon matrixes." Journal of the American Chemical Society 112, no. 13 (1990): 5117–22. http://dx.doi.org/10.1021/ja00169a020.

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21

Miki, Sadao, Kohji Matsuo, Masahiro Yoshida, and Zen-ichi Yoshida. "Novel anthraquinone derivatives undergoing photochemical valence isomerization." Tetrahedron Letters 29, no. 18 (1988): 2211–14. http://dx.doi.org/10.1016/s0040-4039(00)86714-3.

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22

Momotake, Atsuya, Junpei Hayakawa, Ritsuko Nagahata, and Tatsuo Arai. "The Photochemical Specific Isomerization of Dendritic Stilbenes." Bulletin of the Chemical Society of Japan 77, no. 6 (2004): 1195–200. http://dx.doi.org/10.1246/bcsj.77.1195.

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23

MacLeod, Paula J., Alexandra L. Pincock, James A. Pincock, and Kim A. Thompson. "Photochemical Equilibration/Isomerization ofp-,m-, ando-Methylbenzonitrile." Journal of the American Chemical Society 120, no. 26 (1998): 6443–50. http://dx.doi.org/10.1021/ja9808301.

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24

D'Auria, Maurizio. "ChemInform Abstract: Photochemical Isomerization of Pentaatomic Heterocycles." ChemInform 32, no. 47 (2010): no. http://dx.doi.org/10.1002/chin.200147270.

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25

Su, Ming-Der. "Photochemical isomerization reactions of acrylonitrile. A mechanistic study." RSC Advances 8, no. 11 (2018): 5647–51. http://dx.doi.org/10.1039/c7ra12614j.

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26

de Geus, Mark A. R., G. J. Mirjam Groenewold, Elmer Maurits, Can Araman, and Sander I. van Kasteren. "Synthetic methodology towards allylic trans-cyclooctene-ethers enables modification of carbohydrates: bioorthogonal manipulation of the lac repressor." Chemical Science 11, no. 37 (2020): 10175–79. http://dx.doi.org/10.1039/d0sc03216f.

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Two novel reagents were developed to direct formation of allylic cis-cyclooctene (CCO) ethers, followed by photochemical isomerization to obtain trans-cyclooctene (TCO) ethers. The method was used to cage a bio-active carbohydrate.

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27

Carson, Philip A., and Paul de Mayo. "Surface photochemistry: Semiconductor mediated reactions of some 1,2-diarylcyclopropanes." Canadian Journal of Chemistry 65, no. 5 (1987): 976–79. http://dx.doi.org/10.1139/v87-166.

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1,2-Diphenylcyclopropane (1) was found to be oxidized on illuminated ZnO in the presence of air while 1-(p-methoxyphenyl)-2-phenylcyclopropane (2) and 1,2-bis(p-methoxyphenyl)cyclopropane (3) were found to be similarly oxidized on illuminated CdS. Compounds 2 and 3 were found, also, to undergo a rapid photochemical cis-trans isomerization on CdS whereas 1 did not undergo such isomerization. An electron transfer mechanism involving formation of the radical cations of the substrates is proposed.

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28

Su, Ming-Der. "CASSCF and CASMP2 study on the photoisomerization mechanisms of [tris(trialkylsilyl)silyl]cyclotetrasilene and related cyclobutene molecules." RSC Advances 7, no. 16 (2017): 9975–80. http://dx.doi.org/10.1039/c7ra00506g.

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The photo-isomerization reaction mechanisms for both cyclotetrasilene and cyclobutene are theoretically studied. The model computations show that the conical intersection mechanism plays a key role in these photochemical reactions and that there are no radicals.

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29

Lin, Yilan, Xiaofan Wei, Dong Fang, et al. "Investigation of ultrafast photoisomerization dynamics of azobenzene derivative (E)-1-phenyl-2-((triisopropylsilyl)ethynyl)diazene." Chinese Journal of Chemical Physics 36, no. 6 (2023): 664–70. http://dx.doi.org/10.1063/1674-0068/cjcp2312119.

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When exposed to light at a specific wavelength, azobenzene and its derivatives experience a transformation from trans form to cis form through isomerization. Due to its ability to change color upon illumination, azobenzene finds extensive use in various molecular devices and functional materials. However, despite significant researches focused on practical applications, there are still ongoing investigations into the underlying mechanisms governing azobenzene’s photochemical reactions and isomerization. In this study, we employ femtosecond stimulated Raman spectroscopy (FSRS), and transient ab

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30

Su, Ming-Der. "Photochemical Isomerization Reactions of Cyanopyrroles: A Theoretical Study." Journal of Physical Chemistry A 110, no. 46 (2006): 12653–61. http://dx.doi.org/10.1021/jp063674q.

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31

D'Auria, Maurizio, and Lucia Emanuele. "The photochemical isomerization in pyridazine-N-oxide derivatives." Tetrahedron 164 (September 2024): 134173. http://dx.doi.org/10.1016/j.tet.2024.134173.

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32

Bent, Gary D. "Rate equations for the photochemical isomerization of bicyclobutane." Journal of Physical Chemistry 96, no. 20 (1992): 8084–89. http://dx.doi.org/10.1021/j100199a047.

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33

Cacelli, Ivo, Maurizio D'Auria, and Vincenzo Villani. "Theoretical Study of the Photochemical Isomerization of Colchicine." Journal of Chemical Theory and Computation 3, no. 2 (2007): 649–56. http://dx.doi.org/10.1021/ct600306t.

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34

Lapinski, Leszek, Riet Ramaekers, Borys Kierdaszuk, Guido Maes, and Maciej J. Nowak. "Photochemical syn–anti isomerization reactions in N4-methoxycytosines." Journal of Photochemistry and Photobiology A: Chemistry 163, no. 3 (2004): 489–95. http://dx.doi.org/10.1016/j.jphotochem.2004.02.004.

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35

Arai, Tatsuo, and Katsumi Tokumaru. "Photochemical one-way adiabatic isomerization of aromatic olefins." Chemical Reviews 93, no. 1 (1993): 23–39. http://dx.doi.org/10.1021/cr00017a002.

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36

Marcandalli, Bruno, Alberto Seves, Emestina Dubini-Paglia, and Pier Luigi Beltrame. "Photochemical trans-cis isomerization of some 4-diethylaminoazobenzenes." Dyes and Pigments 14, no. 2 (1990): 79–88. http://dx.doi.org/10.1016/0143-7208(90)87008-q.

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37

Luck, Meike, Sara Bruun, Anke Keidel, Peter Hegemann, and Peter Hildebrandt. "Photochemical chromophore isomerization in histidine kinase rhodopsin HKR1." FEBS Letters 589, no. 10 (2015): 1067–71. http://dx.doi.org/10.1016/j.febslet.2015.03.024.

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38

Hamper, Bruce C., Bradley Gallow, Gregory Giovine, and Trevor Smith. "Continuous-Flow Photochemical Isomerization of Humulones to Isohumulones." Molecules 30, no. 5 (2025): 1002. https://doi.org/10.3390/molecules30051002.

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Humulones are a family of homolog natural products obtained from the strobiles of humulus lupulus, or hops plants. Structurally, they consist of substituted phloroglucinols with two isoprenyl side chains, a carbonyl group and a quaternary ring carbon substituted with a hydroxyl group. The three most prominent homologs are n-, co- and ad-humulone, containing isobutyl, isopropyl and secbutyl ketone groups, respectively. When solutions of humulones are exposed to UV light, they undergo stereoselective isomerization to the five-membered ring trans-isohumulones. A photoreactor was assembled from st

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39

Hricovíni, Michal, James Asher, and Miloš Hricovíni. "Photochemical anti–syn isomerization around the –N–N bond in heterocyclic imines." RSC Advances 10, no. 10 (2020): 5540–50. http://dx.doi.org/10.1039/c9ra10730d.

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40

Timtcheva, I., P. Nikolov, J. Zechner, N. Getoff, and St Minchev. "Mechanism of the Photochemical Isomerization of Indan-Dions to Benzylidenephthalides." Zeitschrift für Naturforschung A 42, no. 5 (1987): 490–94. http://dx.doi.org/10.1515/zna-1987-0511.

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The photoinduced isomerization of 15 2-arylindan-1,3-diones and 5 2,6-diaryl-s-hydrindacene- 1,3,5,7-tetrones was studied. Spectroscopic data, quantum yields of final products and a probable processes of these compounds are presented.

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41

Maranzana, Andrea, and Glauco Tonachini. "Mechanism of the Photochemical Isomerization and Oxidation of 2-Butenedial: A Theoretical Study." Molecules 28, no. 13 (2023): 4994. http://dx.doi.org/10.3390/molecules28134994.

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Under tropospheric conditions, 2-butenedial is photochemically removed to produce secondary organic aerosol. Upon solar irradiation in the lower troposphere, the main photochemical products are ketene-enol (a key intermediate product), furanones, and maleic anhydride. The oxidative reaction mechanism was studied using the multireference method CASSCF to explore the hypersurface of the two most accessible singlet excited states, and by DFT for the ground state. Photoisomerization of 2-butenedial in the first excited state directly produces ground state ketene-enol upon nonradiative relaxation.

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42

Ogawa, M., M. Hama, and K. Kuroda. "Photochromism of azobenzene in the hydrophobic interlayer spaces of dialkyldimethylammonium-fluor-tetrasilicic mica films." Clay Minerals 34, no. 2 (1999): 213–20. http://dx.doi.org/10.1180/000985599546127.

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AbstractPhotochemical isomerization of azobenzene intercalated in the hydrophobic, interlayer spaces of swelling fluor-tetrasilicic micas exchanged with dialkyldimethylammonium ions, with the alkyl chain length from 10 to 18, was investigated. Thin films of the organoammonium-mica-azobenzene intercalation compounds were obtained by depositing a suspension of the organoammonium-micas (prepared using a toluene/methanol solution of azobenzene) on quartz substrates. The intercalated azobenzene showed reversible photochromic reactions induced by UV and visible light irradiation. The fraction of the

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43

Šandrik, Róbert, Pavol Tisovský, Klaudia Csicsai, et al. "ON/OFF Photostimulation of Isatin Bipyridyl Hydrazones: Photochemical and Spectral Study." Molecules 24, no. 14 (2019): 2668. http://dx.doi.org/10.3390/molecules24142668.

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Four novel isatin hydrazones containing bipyridyl fragments were synthesized as potential ON/OFF switches. Hydrazone Z-isomers exhibit high thermal stability. The characteristic photochemical reaction for all studied hydrazones is the Z–E isomerization in CHCl3. After irradiation of hydrazones 1 and 2 in dimethylformamide (DMF), the photoreaction products are tautomers. When using light with the appropriate wavelength, the photo-tautomerization reaction is reversible. In these conditions, studied hydrazones have ON/OFF switch properties. In the case of hydrazones 1 and 2, by alternating heat a

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44

Donovalová, J., P. Hrnčiar, A. Gáplovský, and I. Ostrovský. "Photochemical Z-E isomerization of benzylidenephthalides: influence of oxygen on the course of isomerization." Journal of Photochemistry 34, no. 3 (1986): 333–38. http://dx.doi.org/10.1016/0047-2670(86)87106-4.

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45

Grabchev, Ivo, and Vladimir Bojinov. "Photoisomerization of Triazine-stilbene Fluorescent Brighteners in Solution and in their Copolymers with Styrene." Zeitschrift für Naturforschung A 55, no. 9-10 (2000): 833–36. http://dx.doi.org/10.1515/zna-2000-9-1014.

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Abstract The paper reports on the photochemical trans-cis isomerization of some new polymerizable triazine-stilbene fluorescent brighteners and their copolymers with styrene in aqueous and ethanol solutions. A dependence of trans-cis isomers in solution equilibrium and in solid polymeric films on the nature of the substituent in the triazine ring has been found.

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46

Wingert, Horst, and Manfred Regitz. "Synthesen mit Cyclobutadienen, 14 [1]. Tetra-tert-butylprismane durch Dewarbenzol-Isomerisierung / Syntheses with Cyclobutadienes, 14 [1]. Tetra-tert-butylprismanes by Dewarbenzene-Isomerization." Zeitschrift für Naturforschung B 41, no. 10 (1986): 1306–10. http://dx.doi.org/10.1515/znb-1986-1018.

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The kinetically stabilized cyclobutadiene 2 undergoes [4+2]-cycloaddition reaction at elevated temperature with the acetylenecarboxylate 3 to yield the regioisomeric dewarbenzenes 5 and 6. They are transformed into the prismanes 7 and 8 by a photochemical intramolecular [2+2]- cycloaddition process. Under thermal conditions (150 °C) this isomerization reaction is reversible (7→5, 8→6).

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47

Huneck, Siegfried, Jürgen Schmidt, and Andrea Porzel. "Zur Chemie der Roccellsäure / On the Chemistry of Roccellic Acid." Zeitschrift für Naturforschung B 49, no. 4 (1994): 561–68. http://dx.doi.org/10.1515/znb-1994-0420.

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The isomerization of roccellic acid to threo-roccellic acid has been investigated. Reduction of dimethyl roccellate with LiAlH4 gave the corresponding diol which yielded on oxidation with Jones' reagent two isomeric γ-lactones. 1-Methyl roccellic amide has been transformed by a photochemical reaction to the δ-lactone acaranoic acid. Two copper complexes of roccellimide have been prepared.

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48

D'Auria, Maurizio, and Rocco Racioppi. "The Photochemical Isomerization of Pyrazoles: An AB Initio Study." Letters in Organic Chemistry 1, no. 1 (2004): 12–19. http://dx.doi.org/10.2174/1570178043488806.

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49

HASHIMOTO, Keiji, Tsutomu YAOI, Hiroyuki KOSHIBA, et al. "Photochemical Isomerization of Piperine, a Pungent Constituent in Pepper." Food Science and Technology International, Tokyo 2, no. 1 (1996): 24–29. http://dx.doi.org/10.3136/fsti9596t9798.2.24.

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50

Åberg, Ulf, and Villy Sundström. "Photochemical isomerization in the absence of a potential barrier." Proceedings / Indian Academy of Sciences 103, no. 3 (1991): 441–46. http://dx.doi.org/10.1007/bf02842104.

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