Journal ArticleDOI
Time-resolved resonance Raman and molecular orbital studies of the structures of the transient species involved in the photochromic reaction of 2,2′-spirobi[2H-1-benzopyran]
Syuichi Hashimoto,Atsuhiko Shimojima,Tetsuro Yuzawa,Hidefumi Hiura,Jiro Abe,Hiroaki Takahashi +5 more
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TLDR
In this paper, the resonance Raman spectra of 2,2′-spirobi[2H-1-benzopyran] in various solvents reveal that at least two isomers exist in solution, the relative abundance of which depends on polarity and hydrogen-bond donor ability of the solvent.About:
This article is published in Journal of Molecular Structure.The article was published on 1991-01-01. It has received 21 citations till now. The article focuses on the topics: Raman spectroscopy & Benzopyran.read more
Citations
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Journal ArticleDOI
One-electron photoreduction of flavin mononucleotide: time-resolved resonance Raman and absorption study
Makoto Sakai,Hiroaki Takahashi +1 more
TL;DR: In this article, the authors obtained the Resonance Raman and absorption spectra of the lowest excited triplet state T1, and semiquinone neutral and anion radicals of flavin mononucleotide (FMN) using laser flash photolysis.
Journal ArticleDOI
Transient Resonance Raman and ab Initio MO Calculation Studies of the Structures and Vibrational Assignments of the T1 State and the Anion Radical of Coumarin and Its Isotopically Substituted Analogues
TL;DR: In this paper, the vibrational assignments of ground state S0, CM•-, and 3CM* were performed based on both the frequency shifts on isotopic (18O, 13C, and deuterium) substitutions and normal-coordinate calculations using the force constants obtained by ab initio molecular orbital computations.
Journal ArticleDOI
Molecular dynamics simulation of poly(spiropyran-L-glutamate) : influence of chromophore isomerization
Ruth Pachter,Thomas M. Cooper,L. V. Natarajan,Keith A. Obermeier,Robert L. Crane,W. Wade Adams +5 more
TL;DR: Cooper et al. as discussed by the authors studied the influence of spiropyran to merocyanine ring opening on a model of poly(spiropyan-L-glutamate) as implied by the experimental data and showed that the α-helical secondary structure is less conserved in the polypeptide substituted with the merocynine form of the chromophore.
Journal ArticleDOI
Structures and dynamics of the lowest excited triplet states and cation radicals of phenothiazine and 2-chlorophenothiazine: transient resonance Raman and absorption study
TL;DR: In this paper, transient resonance Raman and absorption spectra of the lowest excited triplet states T1 and the cation radicals of phenothiazine and 2-chlorophenothiazines were measured.
Journal ArticleDOI
Time-resolved fluorescence study on the photomerocyanine form of spiropyran and its derivative with azobenzene
TL;DR: In this article, the photomerocyanine (PMC) form originating from spirobenzopyran and the bi-functional photochromic compound SpAz were investigated using picosecond time-resolved fluorescence measurements in solution at 200 and 285 K and in a PMMA polymer film at 298 K.
References
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Journal ArticleDOI
Photochromism in spiropyrans. part iv.1 evidence for the existence of several forms of the colored modification
Journal ArticleDOI
Photochromism in spiropyrans. part v.1 on the mechanism of phototransformation
Journal ArticleDOI
Photochromism and reversible multiple internal transitions in some spiroPyrans at low temperatures. Part II
Yehuda Hirshberg,Ernst Fischer +1 more
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Resonance raman studies of transient species in the photochromism of 1',3',3'-trimethylspiro-[2h-1-benzopyran-2,2'-indoline]
TL;DR: In this article, the transient species in aliphatic hydrocarbons involved the least polar TTC configuration (trans-trans-cis with respect to the three C-C partial double bonds in the merocyanine-like skeleton), while in polar solvents, CTT and CTC configurations having larger dipole moments are more stable than TTC.
Journal ArticleDOI
Time-resolved resonance raman studies of the photochromic reaction of 6-nitro-1′,3′,3′-trimethylspiro[2H-1-benzopyran-2,2′-indoline]
TL;DR: The transient resonance Raman spectra of 6-nitro-1′,3′, 3′-3′-trimethylspiro[2 H -1-benzopyran-2,2′-indoline] reveal that at least five transient species are involved in the photochromic reaction of this compound.
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