NONRADIATIVE PATHWAYS OF ANILINO-NAPHTHALENE SULFONATES - TWISTED INTRAMOLECULAR CHARGE-TRANSFER VERSUS INTERSYSTEM CROSSING

被引：33

作者：

DAS, K

SARKAR, N

NATH, D

BHATTACHARYYA, K

机构：

[1] Physical Chemistry Department, Indian Association for the Cultivation of Science, Jadavpur, Calcutta

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 1992年 / 48卷 / 11-12期

关键词：

D O I：

10.1016/0584-8539(92)80243-P

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The effect of solvent polarity and external heavy atom (ethyl iodide) on the fluorescence properties of 2-tolouidino-6-naphthalene-sulphonate (TNS) and 1-anilino-8-naphthalene-sulphonate (ANS) have been studied. For ANS with rise in polarity, a monotonic decrease of fluorescence yield (phi(f)) and lifetime (tau(f)) is observed while ethyl iodide was found to have negligible effect. For TNS at low polarity phi(f) and tau(f) are found to increase with rise in polarity, while ethyl iodide causes a decrease in tau(f). At high polarity [E(T)(30) > 51] behaviour of TNS is more or less similar to that of ANS. It is proposed that polarity-dependent, twisted intramolecular charge transfer is the main non-radiative process for ANS at all polarities [E(T)(30) = 36-63] and for TNS only at high polarity. At low polarity intersystem crossing is the main non-radiative pathway for TNS.

引用

页码：1701 / 1705

页数：5

共 17 条

[1] A MODEL FOR MOLECULES WITH TWISTED INTRAMOLECULAR CHARGE-TRANSFER CHARACTERISTICS - SOLVENT POLARITY EFFECT ON THE NONRADIATIVE RATES OF DYES IN A SERIES OF WATER ETHANOL MIXED-SOLVENTS [J].