Solvation dynamics of Nile Red in a room temperature ionic liquid using streak camera

被引：93

作者：

Saha, S

Mandal, PK

Samanta, A

机构：

[1] Univ Tokyo, Sch Sci, Dept Chem, Bunkyo Ku, Tokyo 1130033, Japan

[2] Univ Hyderabad, Sch Chem, Hyderabad 500046, Andhra Pradesh, India

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2004年 / 6卷 / 12期

关键词：

D O I：

10.1039/b316943j

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：

Time-resolved fluorescence behavior of Nile Red (NR) has been studied using a streak camera in a room temperature ionic liquid, [bmim]PF6. Wavelength dependent fluorescence decay and time dependent fluorescence Stokes shift have been observed. The time-correlated spectral shift function, C(t), indicator for solvation dynamics of NR in [bmim]PF6, is found to be biexponential with two well-separated time constants: 0.13 and 1.25 ns. The short and the long component of the dynamics have been explained in terms of the translational motion of the anion and a collective motion of the cation and anion, respectively. The effect of two different conformers of the cation of this room temperature ionic liquid, as revealed in the recent studies, on the long time constant is also discussed.

引用

页码：3106 / 3110

页数：5

共 46 条

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