NDLI: Effect of bilayer number on the photoluminescent property of TPE-based self-assembled film

Content Provider	Springer Nature Link
Author	Chen, DiDi Feng, Xiao Gu, ShangZhi Tong, Bin Shi, JianBing Zhi, JunGe Dong, YuPing
Copyright Year	2013
Abstract	Tetraphenylethylene (TPE) derivatives have been proved to be typical aggregation-induced emission (AIE) luminogens when they were aggregated in the free three-dimensional space. In order to reveal the effect of the dimensional degree on AIE property of TPEs, we utilized tetra(4-hydroxyphenyl)ethylene (TPE-4OH) and 1,4-benzenediamine diazonium salt (BD) to fabricate the ultra-thin films (TPE-4OH/BD LBL SA film) through layer-by-layer self-assembled technique. The interaction between TPE-4OH and BD in the films was converted from electrostatic force and hydrogen-bond to covalent bonds through photodecomposition of diazonium groups under UV irradiation. Fluorescence emission spectroscopy, UV-Vis absorption spectroscopy and atomic force microscope were carried out to evaluate the relationship between bilayer number and photoluminescence of the TPE-based self-assembled films. The experimental results showed that the TPE-based film with three bilayers only displayed AIE character, whereas the fluorescence of the film became randomly changed if the bilayer number was above three. It is supposed that the fluorescence property of the TPE-4OH/BD LBL SA film with limited molecular length in z-axis and infinite aggregation space in x- and y-axis is dominated by two competitive effects, one is the partial restriction of intramolecular rotation through short intermolecular interactions in cross-linked structure of TPE-4OH/BD, and the other is deactivation of its excited state through unrestricted intramolecular rotations or π-π interactions.
Starting Page	2728
Ending Page	2732
Page Count	5
File Format	PDF
ISSN	10016538
Journal	Chinese Science Bulletin
Volume Number	58
Issue Number	22
e-ISSN	18619541
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-07-01
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	tetraphenylethylene aggregation-induced emission layer-by-layer self-assembled film 1,4-benzenediamine diazonium salt Science Life Sciences Physics Chemistry/Food Science Earth Sciences Engineering
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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