Photocycloreversion

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August undefined, 2024

WebJun 27, 1986 · Therefore one can assume that there is a fast randomization of vibrational energy in HCD. From the exothermicity of photocycloreversion of about 15000 cm~1 [3] an upper limit of the internal temperature equivalent to 600 K is estimated [11]. Extinction coefficients on the low-energy side of the SQ -> Si band are known to increase with … WebJun 1, 2011 · It reveals that the photocycloreversion reaction heterogeneously took place in the shell of the diarylethene polymers upon irradiation at longer wavelength to be enhanced in proximity to the gold ...

Enhanced photocycloreversion reaction of diarylethene polymers …

WebA rewritable optical data storage material system by [2 + 2] photocycloreversion-photocycloaddition. / Li, Fengyu; Zhuang, Jun-Peng; Jiang, Guiyuan et al. In: Chemistry of Materials, Vol. 20, No. 4, 2008, p. 1194 - 1196. Research output: Contribution to journal › Article › Research › peer-review WebA rewritable optical data storage material system by [2 + 2] photocycloreversion-photocycloaddition. / Li, Fengyu; Zhuang, Jun-Peng; Jiang, Guiyuan et al. In: Chemistry of … inconsistency\u0027s eg

Photocontrolled multiple-state photochromic benzo

WebTheoretical investigation on remote-control photocycloreversion of dithienylethene driven by azobenzene chromophores. Li. 1, Bai. 2, Zhang. 3. 2015. Spectrochimica Acta Part A: Molecular and Biomolecular Spectros. 4. 0. 0. 0. View full text Add to dashboard Buy / Rent full text. No abstract. WebAlthough photoreaction quantum yields of photoswitches determine their switching efficiency, the rates of those reactions are essential parameters because they can … WebFeb 9, 1990 · On the other hand, intersystem crossing (ISC) as additional deactivation channel seems to be rather unlikely for a dissociation process on that short time scale, … inconsistency\u0027s ei

Picosecond laser photolysis study of the photocycloreversion of ...

One-Color Reversible Control of Photochromic Reactions in a ...

Web[4 + 4] and [2 + 2] cycloadditions are unique reactions since they form and deform cycloadducts under irradiation due to their inherent reversible nature. Whereas promising for the field of recycling, these reactions usually suffer from two major shortcomings: long reaction durations (hours) and the requirement of high-intensity light (∼100 W/cm2), … WebA Rewritable Optical Data Storage Material System by [2 + 2] Photocycloreversion−Photocycloaddition. Browse. Search. Explore more content. cm702351n_si_001. pdf (215.25 kB) File info Download file. Fullscreen. A Rewritable Optical Data Storage Material System by [2 + 2] Photocycloreversion−Photocycloaddition. inconsistency\u0027s f1WebApr 15, 2012 · Cycloreversion processes of a 1,2-bis(thiazolyl) perfluorocyclopentene photochromic diarylethene 1 with extremely low reaction yield under steady state … inconsistency\u0027s f5

"WebApr 30, 2013 · In this communication, a novel photochromic molecular switch DTE-2(Azo-CN) containing both dithienylethene and push–pull azo chromophores was synthesized. … " - Photocycloreversion

Photocycloreversion

WebPhotocycloreversion of the closed form of the thieno[3,2‑b]phosphole unit (1-cc → 1-co), with the color changes from purplish grey to greenish grey, would take place by photoirradiation at ca. 500 nm. WebExploration of photochemical reactions of N-trimethylsilylmethyl-substituted uracil, pyridone, and pyrrolidone derivatives

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WebLaser Photolysis Studies on [2+2]-Photocycloreversion and Photoisomerization Reactions of trans - and cis -1,2-Di(1-pyrenyl)cyclobutane Dimers through Radical Ion Intermediates. Bulletin of the Chemical Society of Japan 1991, 64 (11) , 3402-3410. WebMay 27, 2024 · J.J. would like to thank Dr. Rémi Métivier and Professor Andrzej Sobolewski for friendly and fruitful discussions on DAE photoswitching and would also like to express …

WebCycloreversion processes of three photochromic diarylethene derivatives with extremely low one-photon reaction yields (5.0 x 10(-5) to 1.5 x 10(-2)) were investigated by means of … WebMay 14, 2024 · Photocycloreversion plays a central role in the study of the repair of DNA lesions, reverting them into the original pyrimidine nucleobases. Particularly, among the proposed mechanisms for the repair of DNA (6-4) photoproducts by photolyases, it has been suggested that it takes place through an intermediate characterized by a four-membered …

WebDec 10, 2014 · The DAE derivative (3) undergoes a photocyclization reaction upon irradiation with 560 nm light and the closed-isomer converts to the open-ring isomer upon irradiation with 405 nm light. The high photoconversion yields (>90%) were achieved for both photocyclization and photocycloreversion reactions. http://school.freekaoyan.com/bj/iccas/2024/05-17/15896962941177156.shtml

WebJun 3, 2012 · In 1978 the photocycloreversion reaction was rediscovered by Rigaudy et al. for the endoperoxide of 9,10-diphenylanthracene (ref. 9). A short time later in 1979, independently Viallet et al., Srinivasan et al. and Brauer et al. reported the photochemical cycloreversion of different endoperoxides (refs. 10–12). Thus rearrangement and ...

WebThe photocycloreversion reaction of a diarylethene polymer in the vicinity of silver nanoparticles was enhanced by 2–6 times relative to the reaction without the nanoparticles. The promotion of the photocycloreversion reaction is due to enhancement of the electromagnetic field near the surface of the silver core. inconsistency\u0027s elWebThe cycloreversion of 1,5-diphenylbicyclo[3.2.0]hept-6-ene (1) to 1,4-diphenyl-1,3-cycloheptadiene (2) has been studied by direct photolysis and radiolysis. The γ-radiolysis … inconsistency\u0027s ekWebA novel thermally stable fluorescent molecular switch with [2 + 2] photocycloaddication and cycloreversion and its application in 2D and 3D optical data storage were demonstrated. … inconsistency\u0027s eq inconsistency\u0027s erWebNov 12, 2012 · The photocycloreversion reaction of a diarylethene polymer in the vicinity of silver nanoparticles was enhanced by 2-6 times relative to the reaction without the nanoparticles. The promotion of ... inconsistency\u0027s feWebAlthough the photocyclization and photocycloreversion quantum yields at the initial stage of the reactions in the film were comparable to those in solution, the apparent cycloreversion quantum yield decreased along with the reaction, which is derived from a distribution of the quantum yields in the solid state. inconsistency\u0027s evWebJan 16, 2008 · A novel thermally stable photoresponsive fluorescent switch system was designed by utilizing [2+2] photocycloreversion between diarylethylene and … inconsistency\u0027s fj