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Relevant bibliographies by topics / PHOTOCHEMICAL ISOMERISM

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Academic literature on the topic 'PHOTOCHEMICAL ISOMERISM'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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Journal articles on the topic "PHOTOCHEMICAL ISOMERISM"

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Bitterwolf, Thomas E. "Photochemical nitrosyl linkage isomerism/metastable states." Coordination Chemistry Reviews 250, no. 9-10 (2006): 1196–207. http://dx.doi.org/10.1016/j.ccr.2005.12.016.

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Hatcher, Lauren, and Paul Raithby. "Photocrystallographic and kinetic studies of metastable linkage isomers." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C773. http://dx.doi.org/10.1107/s2053273314092262.

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The ability of a molecular system to reversibly convert between two distinct states on photoactivation is desirable for many real-world applications, including photo-switchable device media. When induced in the solid-state, the process can be studied by crystallography and specifically photocrystallographic methods have contributed greatly to this diverse research area. The process of linkage isomerism has proved popular for photocrystallographic study. While the atomic rearrangements involved in the process are large enough to be determined from diffraction data, the changes are also moderate

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Lopes Jesus, A. J., Cláudio M. Nunes, Gil A. Ferreira, Kiarash Keyvan, and R. Fausto. "Photochemical Generation and Characterization of C-Aminophenyl-Nitrilimines: Insights on Their Bond-Shift Isomers by Matrix-Isolation IR Spectroscopy and Density Functional Theory Calculations." Molecules 29, no. 15 (2024): 3497. http://dx.doi.org/10.3390/molecules29153497.

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The intriguing ability of C-phenyl-nitrilimine to co-exist as allenic and propargylic bond-shift isomers motivated us to investigate how substituents in the phenyl ring influence this behavior. Building on our previous work on the meta- and para-OH substitution, here we extended this investigation to explore the effect of the NH2 substitution. For this purpose, C-(4-aminophenyl)- and C-(3-aminophenyl)-nitrilimines were photogenerated in an argon matrix at 15 K by narrowband UV-light irradiation (λ = 230 nm) of 5-(4-aminophenyl)- and 5-(3-aminophenyl)-tetrazole, respectively. The produced nitri

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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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Custodio Castro, Michelle T., Carlos O. Della Védova, Helge Willner, and Rosana M. Romano. "Ar-Matrix Studies of the Photochemical Reaction between CS2 and ClF: Prereactive Complexes and Bond Isomerism of the Photoproducts." Photochem 2, no. 3 (2022): 765–78. http://dx.doi.org/10.3390/photochem2030049.

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In this work, prereactive complexes, reaction products, and conformational preferences derived from the photochemical reaction between CS2 and ClF were analyzed following the codeposition of the reactants trapped in argon matrices at cryogenic temperatures. After codeposition of CS2 and ClF diluted in Ar, the formation of van der Waals complexes is observed. When the mixture is subsequently irradiated by means of broad-band UV-visible light (225 ≤ λ ≤ 800 nm), fluorothiocarbonylsulfenyl chloride (FC(S)SCl) and chlorothiocarbonylsulfenyl fluoride (ClC(S)SF) are produced. These species exist as

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Ichino, Rina, Atsuya Momotake, and Tatsuo Arai. "Photochemical properties of enediyne-cored dendrimers bearing naphthalenes at the periphery." Canadian Journal of Chemistry 97, no. 2 (2019): 112–19. http://dx.doi.org/10.1139/cjc-2018-0128.

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A novel series of trans and cis enediyne-cored dendrimers bearing naphthalenes at the periphery were synthesized and their photochemical properties were examined. The trans/cis isomer ratio in the photostationary state was dependent on the excitation site in the dendrimers. When the enediyne core was selectively excited, the trans/cis isomer ratio in the photostationary state was either around 50/50 or a cis-rich mixture in all dendrimers due to the larger molar extinction coefficient of the trans-enediynes. On the other hand, when naphthalene was excited, a trans-rich mixture was unexpectedly

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Fabian, Jürgen, and Peter Birner. "A theoretical study of the disulfide/dithione valence isomerism." Collection of Czechoslovak Chemical Communications 53, no. 9 (1988): 2096–115. http://dx.doi.org/10.1135/cccc19882096.

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According to MNDO calculations on 1,2-dithiete (IIIa), 1,2-dithiin (IVa) and 3,4-dimethylene-1,2-dithiane (Va) the closed-ring compounds are thermodynamically more stable than the open-chain compounds whereas the reverse holds for 4-methylene-1,2-dithiole (VIa). Substitution of the exocyclic CH2 group of VIa by O, S, NH, and OH+ stabilizes its cyclic mesoionic structure. The low triplet state energy of VIa and of some derivatives relative to the lowest singlet state energy signalizes the biradicaloid nature of these electronic structures. Replacement of hydrogen of the methine groups adjacent

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Champenois, E. G., D. M. Sanchez, J. Yang, et al. "Conformer-specific photochemistry imaged in real space and time." Science 374, no. 6564 (2021): 178–82. http://dx.doi.org/10.1126/science.abk3132.

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Conformer-specific dynamics Conformation-dependent dynamics play an important role in organic chemistry syntheses such as electrocyclic reactions, as well as in biological processes such as protein folding. However, current time-resolved experimental methods struggle to distinguish conformers from each other, and conformational isomerism is usually analyzed through reactant and product distributions. Using a combination of mega–electron volt ultrafast electron diffraction and quantum wave packet simulations, Champenois et al . directly followed the photochemical electrocyclic ring opening of t

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Debatra, Narayan Neogi, Singh Chhetri Satyadeep, Das Purak, Narayan Biswas Achintesh, Choudhury Amitava, and Bandyopadhyay Pinaki. "Role of auxiliary donors in tuning the selectivity of C-H activation in arylazonaphthalenes by palladium(II) : Isolation and photoisomerization of isomeric cyclopalladates." Journal of Indian Chemical Society Vol. 92, Dec 2015 (2015): 1783–90. https://doi.org/10.5281/zenodo.5599293.

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Department of Chemistry, University of North Bengal, Siliguri-734 013, West Bengal, India <em>E-mail</em> : pbchem@rediffmail.com Department of Chemistry, Rishi Bankim Chandra College, Naihati-743 165, West Bengal, India Department of Chemistry, Siliguri College, Siliguri-734 001, West Bengal, India Department of Chemistry, Missouri S & T, Rolla, MO 65409-0010, USA Selective activation of C2(naphthyl)-H and C8(naphthyl)-H bonds in a group of substrates having a diazene function as primary donor along with thioether or sulfinyl groups as auxiliary donors has been achieved by palladium(II) a

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Yılmaz, Yusuf, John Mack, M. Kasım Şener, Mehmet Sönmez, and Tebello Nyokong. "Synthesis, photophysicochemical properties and TD-DFT calculations of tetrakis(2-benzoyl-4-chlorophenoxy) phthalocyanines." Journal of Porphyrins and Phthalocyanines 18, no. 04 (2014): 326–35. http://dx.doi.org/10.1142/s1088424614500047.

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The synthesis of metal free, magnesium and zinc tetrakis(2-benzoyl-4-chlorophenoxy) phthalocyanine derivatives (2–4) is described along with their characterization by elemental analysis, IR, UV-visible absorption, and 1 H NMR spectroscopy and mass spectrometry. Trends observed in the fluorescence, triplet state, singlet oxygen and photodegradation quantum yields and the triplet state lifetimes are also analyzed. The compounds exhibit high solubility in a wide range of organic solvents and no evidence of aggregation was observed over a wide concentration range. The Zn ( II ) complex (4) was fou

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Dissertations / Theses on the topic "PHOTOCHEMICAL ISOMERISM"

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Duchesne, Jean-Pierre. "Nouvelle voie d'acces aux aldehydes terpeniques : synthese stereoselective des isomeres 11-trans du retinal a l'aide de sulfones." Paris 6, 1987. http://www.theses.fr/1987PA066347.

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El-Katri, Fares A. "Photochemical generation & hydration of isomeric naphthaquinone methides." 2006. http://purl.galileo.usg.edu/uga%5Fetd/el-katri%5Ffares%5Fa%5F200605%5Fms.

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Book chapters on the topic "PHOTOCHEMICAL ISOMERISM"

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Xu, Leilei, Qiaoxin Guan, and Jianguo Guan. "Light-driven Active Colloids." In Active Colloids. Royal Society of Chemistry, 2024. https://doi.org/10.1039/9781837674589-00172.

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Active colloids, capable of autonomous motion by harnessing energy available in their surroundings, are of significance for advancing micro/nanoscale technologies. Light, as a ubiquitous external stimulus to propel the motion of colloid particles, offers unique benefits such as remote controllability, flexible tunability, and high temporal and spatial resolution. Light-driven active colloids are defined as the particles at the micro/nanoscale that can swim under light irradiation. They, broadly speaking, include micro/nanomotors composed entirely or partially of inorganic materials, microdropl

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Das, Prasanta. "Continuous Scan and Repetitive Mode FT-IR Spectroscopy and Its Application in Isomeric Identification, Conformational Analysis and Photochemistry." In Infrared Spectroscopy - Perspectives and Applications [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.106448.

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This chapter intends to cover the instrumentation of gas phase Fourier transform infrared spectroscopy (FT-IR), its recent advancement, and applications. The major focus have been given to the principle and data acquisition scheme of the repetitive mode measurement method of FT-IR spectrometer. The application of this spectroscopy in the isomeric identification of the methylated polycyclic aromatic hydrocarbons (MPAHs) and the conformational analysis of diols have been discussed. Furthermore, the application of the repetitive measurement mode of FT-IR combined with the UV laser in monitoring t

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Conference papers on the topic "PHOTOCHEMICAL ISOMERISM"

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Liu, Zhiqian, and Simone Rochfort. "Current challenges in phospholipid analysis in bovine milk." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/taft4078.

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Phospholipids (PLs) are important components of milk fat globule membranes. They not only play the role of emulsifier ensuring the stability and homogeneity of the oil/water emulsion system of milk, but also have multiple beneficial functions vis-Ã -vis human health. PLs of milk are a complex family of polar lipids comprising several classes including PC, PE, SM, PS, PI, PA, PG and so on and each class contains a mixture of hundreds of molecular species differing in fatty acid (FA) composition and/or regio-position.Although PL quantification at the class level can be achieved by using NP-LC-EL

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Eich, Manfred, Martin Sprave, Heike Mauermann, et al. "Studies on Novel Photoselectable Organic NLO-Molecules." In Nonlinear Optics. Optica Publishing Group, 1992. http://dx.doi.org/10.1364/nlo.1992.fa2.

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NLO-chromophores of the azobenzene type and of the stilbene type have been used either as dopants or as sidegroups in polymers in order to realize NLO-materials in which the refractive index and the nonlinear susceptibility could be modified optically.1,2 These changes are based on the photochemical transformation of these molecular units from the elongated trans state to the bent cis-state. Since the trans state is the thermodynamically stable state, the cis-isomers generally undergo a thermally activated relaxation back to trans even below the glass transition temperature.3

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Pullen, Stuart, Larry A. Walker, Neil Anderson, and Roseanne J. Sension. "Femtosecond Studies of Isomerization and Energy Relaxation in Small Polyenes." In International Conference on Ultrafast Phenomena. Optica Publishing Group, 1996. http://dx.doi.org/10.1364/up.1996.tue.28.

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Recent advances in laser technology have permitted the extension of femtosecond transient absorption studies into the deep ultraviolet. In the present investigation we have used tunable pump and probe pulses to study the photochemically initiated ring-opening reaction of 1,3-cyclohexadiene (CHD). A proper interpretation of the transient absorption signals obtained in the investigation of this ring-opening reaction requires an understanding of the vibrational and conformational relaxation processes which occur following formation of the hot cis-1,3,5-hexatriene photoproduct. To this end, we hav

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