How do substituents affect silole emission?

doi:10.1039/c3tc30880d

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	How do substituents affect silole emission?
	Zhao, Engui 1,2,3; Lam, Jacky W. Y.1,2,3; Hong, Yuning 1,2,3; Liu, Jianzhao 1,2,3; Peng, Qian 4; Hao, Jianhua 5,6; Sung, Herman H. Y.3; Williams, Ian D.3; Tang, Ben Zhong 1,2,3,7
刊名	JOURNAL OF MATERIALS CHEMISTRY C
	2013
卷号	1 期号:36 页码:5661-5668
ISSN号	2050-7526
DOI	10.1039/c3tc30880d
英文摘要	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.
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000323578000009
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/46775]
专题	中国科学院化学研究所
通讯作者	Tang, Ben Zhong
作者单位	1.HKUST Shenzhen Res Inst, Shenzhen 518057, Peoples R China 2.Hong Kong Univ Sci & Technol, Inst Adv Study, Dept Chem, Div Biomed Engn, Kowloon, Hong Kong, Peoples R China 3.Hong Kong Univ Sci & Technol, Inst Mol Funct Mat, Kowloon, Hong Kong, Peoples R China 4.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Key Lab Organ Solids, Beijing 100190, Peoples R China 5.Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong, Hong Kong, Peoples R China 6.Hong Kong Polytech Univ, Mat Res Ctr, Hong Kong, Hong Kong, Peoples R China 7.S China Univ Technol, State Key Lab Luminescent Mat & Devices, SCUT HKUST Joint Res Lab, Guangdong Innovat Res Team, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Engui,Lam, Jacky W. Y.,Hong, Yuning,et al. How do substituents affect silole emission?[J]. JOURNAL OF MATERIALS CHEMISTRY C,2013,1(36):5661-5668.
APA	Zhao, Engui.,Lam, Jacky W. Y..,Hong, Yuning.,Liu, Jianzhao.,Peng, Qian.,...&Tang, Ben Zhong.(2013).How do substituents affect silole emission?.JOURNAL OF MATERIALS CHEMISTRY C,1(36),5661-5668.
MLA	Zhao, Engui,et al."How do substituents affect silole emission?".JOURNAL OF MATERIALS CHEMISTRY C 1.36(2013):5661-5668.