✦ LIBER ✦

Excited state relaxation of crown ether styryl dyes: photoisomerization

✍ Scribed by M.V. Alfimov; V.F. Kamalov; I.A. Struganova; K. Yoshihara

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 262 KB
Volume: 195
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(92)86146-9

No coin nor oath required. For personal study only.

✦ Synopsis

Photophysical processes are studied in a new class of dyes containing a chromophoric part and a crown ether part (crown ether styryl dyes). Photoisomerization is proposed to be the main channel of nonradiative decay of the singlet excited electronic state. The temperature dependence of fluorescence decay was measured and the lifetime of the trans-isomer in excited electronic state was found to decrease with temperature in ethanol solutions. Isomerization around the C=C bond is discussed, and the activation harrier is estimated as 2.3 and 1.5 kcal/mol for the two crown ether styryl dyes studied.

📜 SIMILAR VOLUMES

Molecular design, photoisomerization and

Molecular design, photoisomerization and complexation of crown ether styryl dyes

✍ M.V. Alfimov; S.P. Gromov; I.K. Lednev 📂 Article 📅 1991 🏛 Elsevier Science 🌐 English ⚖ 442 KB

ChemInform Abstract: Supramolecular Orga

ChemInform Abstract: Supramolecular Organic Photochemistry of Crown Ether Containing Styryl Dyes

✍ S. P. GROMOV; M. V. ALFIMOV 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 25 KB 👁 2 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

ChemInform Abstract: Crown Ether Styryl

ChemInform Abstract: Crown Ether Styryl Dyes. Part 22. Synthesis and Complexation of the cis-Isomers of the Photochromic Aza-15-crown-5-ethers.

✍ S. P. GROMOV; E. N. USHAKOV; O. A. FEDOROVA; V. A. SOLDATENKOVA; M. V. ALFIMOV 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 26 KB 👁 2 views

Femtosecond excited state relaxation of

Femtosecond excited state relaxation of dye molecules in solution

✍ A.M. Weiner; E.P. Ippen 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 501 KB

The bleaching dynamics of organic dye molecules in solution have been investigated using 70 fs pulses from a colliding pulse mode-locked ring dye Laser. In addition to ground state relaxation on a nanosecond time scale, a fast partid recovery 1s observed. For the dyes Nile blue, oxazine 720, cresyl

Formation of dimeric and cation-‘capped’

Formation of dimeric and cation-‘capped’ complexes by crown-ether styryl dyes: A DFT and X-ray study

✍ V.G. Avakyan; D.V. Kondratuk; A.I. Vedernikov; L.G. Kuz’mina; V.Yu. Rudyak; M.V. 📂 Article 📅 2009 🏛 Elsevier Science 🌐 English ⚖ 774 KB

DFT calculations for the benzothiazole styryl dyes containing a benzo-18-crown-6-ether fragment and an ammonioalkyl or ammonio-p-xylylenyl substituent at the quaternary nitrogen atom of the benzothiazolium residue were carried out. The effect of the length and rigidity of the N-substituent on the st

ChemInform Abstract: Crown Ether Styryl

ChemInform Abstract: Crown Ether Styryl Dyes. Part 20. Synthesis, Spectral Properties, and Complex Formation of Photochromic Dyes Based on a 15-Crown-5- substituted Benzothiazole (cf. (IV)).

✍ S. P. GROMOV; D. E. LEVIN; K. YA. BURSHTEIN; V. E. KRASNOVSKII; S. N. DMITRIEVA; 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 30 KB 👁 2 views