THE ROLE OF ALPHA-CYCLODEXTRIN CAVITY SIZE ON THE FLUORESCENCE OF 4-DIETHYLAMINOBENZONITRILE AQUEOUS-SOLUTION

被引：35

作者：

ALHASSAN, KA ^{[1
]}

机构：

[1] YARMOUK UNIV,DEPT CHEM,IRBID,JORDAN

来源：

CHEMICAL PHYSICS LETTERS | 1994年 / 227卷 / 4-5期

关键词：

D O I：

10.1016/0009-2614(94)00853-1

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 fluorescence spectrum of 4-diethylaminobenzonitrile (DEABN) is compared with that of 4-dimethylaminobenzonitrile (DMABN) in alpha-cyclodextrin (CD) aqueous solution. The absence of the twisted intramolecular charge transfer (TICT) fluorescence band around 460 nm in the case of DEABN and its presence in the case of DMABN is attributed to the role of the alpha-CD cavity size on the TICT phenomenon. The diethylamino group is bigger than the dimethylamino group and most probably is interlocked in the hydrophobic environment and, therefore, unable to rotate during the excited state lifetimes. This is supported by the fluorescence decay results.

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页码：527 / 532

页数：6

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