New photochromic salt spiropyrans of indoline series
نویسندگان
چکیده
منابع مشابه
Ultrafast Studies of Photochromic Spiropyrans in Solution
The photochromic reaction dynamics of the spiropyran molecule 1’,3’,3’-trimethyl-6-hydroxyspiro[2H1 -benzopyran-2,2’-indoline] (HBPS) in solution have been studied with picosecond and femtosecond transient electronic absorption spectroscopy. Following excitation near 300 nm, the C-0 bond of the molecule breaks in less than 100 fs to form a metastable species. A small fraction of this metastable...
متن کاملSolid-phase synthesis of photochromic spiropyrans.
[reaction: see text] A convenient solid-phase synthesis of spiropyrans is described. A succinate linker was employed, which allows base-catalyzed cleavage of the desired photochromophore derivatized with a succinimide. Excellent yields and purities were obtained for the compounds that comprise a library of 23 spiropyrans. Opening of the succinimide ring in spiropyran could be realized under mil...
متن کاملSystematic variation of thiophene substituents in photochromic spiropyrans.
Spiropyrans are notable among different classes of photochromic compounds due to their large structural and electronic transformation upon isomerization. In order to parlay the electronic differences associated with the two isomeric forms into a materials based switch, the spiropyran ultimately requires a covalent attachment through a conjugated pathway. In this work a synthetic method was deve...
متن کاملUseful spectrokinetic methods for the investigation of photochromic and thermo-photochromic spiropyrans.
This review reports on the main results of a set of kinetic elucidation methods developed by our team over the last few years. Formalisms, procedures and examples to solve all possible AB photochromic and thermophotochromic kinetics are presented. Also, discussions of the operating conditions, the continuous irradiation experiment, the spectrokinetic methods testing with numerical integration m...
متن کاملCharacterization of the Thermal and Photoinduced Reactions of Photochromic Spiropyrans in Aqueous Solution
Six water-soluble spiropyran derivatives have been characterized with respect to the thermal and photoinduced reactions over a broad pH-interval. A comprehensive kinetic model was formulated including the spiro- and the merocyanine isomers, the respective protonated forms, and the hydrolysis products. The experimental studies on the hydrolysis reaction mechanism were supplemented by calculation...
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ژورنال
عنوان ژورنال: Доклады Академии наук
سال: 2019
ISSN: 0869-5652
DOI: 10.31857/s0869-56524846698-702