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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 33, Number 8
BKCSDE 33(8)
August 20, 2012 

Facile Evaluation of Thermodynamic Parameters for Reverse Thermochromism of Indolinobenzospiropyran-6-carboxylates in Aqueous Binary Solvents
Sam-Rok Keum, * So-Young Ma, Hyun-Woo Lim, Tae-Hwi Han, Kyu-Hyun Choi
Reverse thermochromism, Aqueous binary solvent mixtures, Prototropic equilibrium, ETE(BM), ET(BM), Preferential solvation
The position of the thermodynamic equilibrium for reverse thermochromic spiropyran 6-carboxylates (SPCOOHs) was easily determined in aqueous binary mixtures, such as water-methanol, water-acetonitrile and water-dimethyl sulfoxide. The existence of more than one type of interconvertible species of the ring-opened form of SP-COOH in aqueous binary solvents enables us to evaluate the molar extinction coefficients of the ring-opened species of SP-COOH and to obtain the thermodynamic parameters.
2683 - 2688
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