Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/34808
Title: How do substituents affect silole emission?
Authors: Zhao, E
Lam, JWY
Hong, Y
Liu, J
Peng, Q
Hao, J 
Sung, HHY
Williams, ID
Tang, BZ
Issue Date: 2013
Publisher: Royal Society of Chemistry
Source: Journal of materials chemistry C, 2013, v. 1, no. 36, p. 5661-5668 How to cite?
Journal: Journal of materials chemistry C
Abstract: Researchers are in constant pursuit of solid-state emitters with high emission efficiency, excellent photostability and large Stokes shift. Among them, siloles are good representatives. In this paper, we report the effect of substituent on the emission of silole. 1,1,3,4-Tetraphenylsilole (TPS) is weakly emissive at 392 nm in both solution and aggregated states. Progressive attachment of the trimethylsilylethynylphenyl (TMSEP) group to the 2,5-positions of TPS generates TPE–TMSEP and TPS–2TMSEP, which emit intensely at 491 nm and 517 nm, respectively, in the condensed phase despite their solutions giving almost no light upon photoexcitation. High solid-state quantum yields of up to 91% are deduced from their solid powders, demonstrating a phenomenon of aggregation-induced emission (AIE). Restriction of the low-frequency motions is proved to be the main cause of the AIE effect. Conformational study and theoretical calculation show that the steric and electronic effects contributed by the 3,4- and 2,5-substituents are crucial for the silole emission.
URI: http://hdl.handle.net/10397/34808
ISSN: 2050-7534 (electronic)
DOI: 10.1039/C3TC30880D
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

16
Citations as of Feb 26, 2017

WEB OF SCIENCETM
Citations

14
Last Week
0
Last month
Citations as of Feb 26, 2017

Page view(s)

19
Last Week
4
Last month
Checked on Feb 26, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.