Spectral and kinetic properties of a red-blue pH-sensitive photochromic spirooxazine

被引：31

作者：

Gaeva, E. B.

Pimienta, V.

Delbaere, S.

Metelitsa, A. V.

Voloshin, N. A.

Minkin, V. I.

Vermeersch, G.

Micheau, J. C. ^{[1
]}

机构：

[1] Univ Toulouse 3, CNRS, UMR 5623, IMRCP, F-31062 Toulouse, France

[2] So Fed Univ, Inst Phys Organ Chem, Rostov Na Donu, Russia

[3] Univ Lille 2, CNRS, UMR 8009, Fac Pharm, F-59006 Lille, France

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2007年 / 191卷 / 2-3期

关键词：

spironaphthoxazine; photochromism; acidichromism; molecular switch; kinetic modelling;

D O I：

10.1016/j.jphotochem.2007.04.011

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

By means of UV/Vis absorption spectroscopy, NMR measurements and kinetic modelling, two spironaphthoxazine compounds bearing 5-OAlk substituent have been investigated in neutral and acidified ethanol media. The kinetics of ring opening/ring closure and the equilibrium constant, the quantum yield of photocoloration, the molar absorption coefficients of the neutral and protonated open forms and pK(a) values have been determined. A three-species photoreversible transformation between the closed form, the open form and the protonated open form has been observed in slightly acidified solutions. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：114 / 121

页数：8

共 25 条

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Bertelson R.C., 1971, Photochromism, VIII, P45

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