Pyrenyl excimers induced by the crystallization of POSS moieties: Spectroscopic studies and sensing applications

被引：14

作者：

Bai, Hua ^{[1
]}

Li, Chun ^{[1
]}

Shi, Gaoquan ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

来源：

CHEMPHYSCHEM | 2008年 / 9卷 / 13期

基金：

中国国家自然科学基金;

关键词：

fluorescence; nitroaromatic compounds; pyrene sensors; thin films;

D O I：

10.1002/cphc.200800149

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：

An ester (PBPOSS) of 1-pyrenebutyric acid (PBA) and 1-(2,3-propanediol)propoxy-3,5,7,9,11,13,15-isobutylpentacyclo-[9.5.1.1(3,9):1(5,15).1(7,13)]octasiloxane (a polyhedral oligomeric silsesquioxane, POSS) is synthesized by simple one-step esterification. Thin films of PBPOSS fabricated by the spin-coating technique exhibit strong excimer emissions of visible light. Upon exposure to the vapours of nitroaromatic compounds, including trinitro-toluene and dinitrotoluene, the films show fast fluorescence quenching. The high performance of these gas sensors is due to the high excimer contents and good vapour permeability of the PBPOSS films. Spectroscopic studies indicate that the crystallization of the POSS moieties in PBPOSS films induce the formation of pyrenyl excimers.

引用

页码：1908 / 1913

页数：6

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