Photo- and solvatochromic properties of nitrobenzospiropyran in ionic liquids containing the [NTf2]- anion

被引：42

作者：

Byrne, Robert ^{[1
]}

Fraser, Kevin J. ^{[2
]}

Izgorodina, Ekaterina ^{[2
]}

MacFarlane, Douglas R. ^{[2
]}

Forsyth, Maria ^{[3
]}

Diamond, Dermot ^{[1
]}

机构：

[1] Dublin City Univ, Sch Chem Sci, Natl Ctr Sensor Res, Adapt Sensors Grp, Dublin 9, Ireland

[2] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia

[3] Monash Univ, Sch Phys & Mat Engn, ARC Ctr Nanostructured Electromat, Clayton, Vic 3800, Australia

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2008年 / 10卷 / 38期

基金：

爱尔兰科学基金会;

关键词：

D O I：

10.1039/b806641h

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 photo-, thermo- and solvatochromic properties of 2,3-dihydro-1',3',3'-trimethyl-6-nitrospiro[1-benzopyran-2,2'-1H-indole] (BSP-NO2) were studied in ILs containing the anion [NTf2](-) by UV-Vis absorption spectroscopy, ab initio molecular orbital theory and density functional theory (DFT) calculations. It was found that the kinetics and thermodynamics of the BSP-NO2 <-> MC (merocyanine) equilibrium was sensitive to the nature of the cation. It was also observed that the imidazolium cation can form a through-space orbital interaction with the MC isomer, rather than a simple electrostatic interaction, thus preventing the MC conversion back to the BSP-NO2 isomer. The BSP-NO2 <-> MC equilibrium thus serves as a model system for studying modes of interaction of the cations in ionic liquids.

引用

页码：5919 / 5924

页数：6

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