EXCITED-STATE DEPROTONATION OF 2-NAPHTHOL BY ANIONS

被引：34

作者：

LAWRENCE, M

MARZZACCO, CJ

MORTON, C

SCHWAB, C

HALPERN, AM

机构：

[1] RHODE ISL COLL,DEPT PHYS SCI,PROVIDENCE,RI 02908

[2] INDIANA STATE UNIV,DEPT CHEM,TERRE HAUTE,IN 47809

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 25期

关键词：

D O I：

10.1021/j100178a012

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：

The excited-state deprotonation of 2-naphthol by hydrogen phosphate, acetate, formate, hydrogen carbonate, fluoride, and benzoate ions in aqueous solutions has been investigated over a temperature range of 20-50-degrees-C. In neutral solutions containing increasing concentrations of these proton acceptor anions, the fluorescence of the free acid form of 2-naphthol is quenched and that of its conjugate base is enhanced. Rate constants for these excited-state deprotonation reactions have been determined by applying a modified Stern-Volmer kinetic model to the 2-naphthol free acid fluorescence intensity measurements. The rate constants are found to show some correlation with the base strengths of the anions. Enthalpies and entropies of activation for these reactions have been determined. These along with solvent effects on the reaction will be presented and discussed.

引用

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页码：10294 / 10299

页数：6

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