Spectroscopic and Morphological Properties of Divinylbenzoxazolylbiphenyl Thin Films

被引：11

作者：

Kukhta, Alexander V. ^{[1
]}

Kukhta, Iryna N. ^{[1
]}

Kolesnik, Eduard E. ^{[1
]}

Stupak, Alexander P. ^{[1
]}

Olkhovic, Vyacheslav K. ^{[2
]}

Vasilevskii, Dmitry A. ^{[2
]}

Galinovskii, Nikolai A. ^{[2
]}

Javnerko, Gennadii K. ^{[2
]}

机构：

[1] Natl Acad Sci Belarus, BI Stepanov Phys Inst, Minsk 220072, BELARUS

[2] Natl Acad Sci Belarus, Inst Chem New Mat, Minsk 220141, BELARUS

来源：

JOURNAL OF FLUORESCENCE | 2009年 / 19卷 / 06期

关键词：

Divinylbenzoxazolylbiphenyl; Thin film; Luminescence; H-aggregation; Morphology; MOLECULAR-ORIENTATION; ALPHA-SEXITHIENYL; EXCITED-STATES; TEMPERATURE;

D O I：

10.1007/s10895-009-0498-3

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

The thin organic films based on 4,4'-bis-[(Z)-1-(1,3-benzoxazol-2-yl-2-ethenyl)]biphenyl and its partly fluorinated derivatives are studied. Absorption, luminescence, and excitation spectra, luminescence decay and film morphology were found to depend sensitively on the changes in molecule structure, nature and temperature of the substrate, as well as the thermovacuum deposition rate, being the origins of bad reproducibility of the optical properties of such films. Molecular aggregation with chromophore dipoles arranged parallel to each other has been observed in absorption and luminescence spectra. The fluorescence characteristics can be explained by the combination of radiation of aggregated and non-aggregated molecules. The main characteristics of the molecules under study are calculated using DFT approach. The unusual behaviour of photodegradation in fluorinated film is found.

引用

页码：989 / 996

页数：8

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