Structural control of the photoluminescence of silole regioisomers and their utility as sensitive regiodiscriminating chemosensors and efficient electroluminescent materials

Zhen Li, Yongqiang Dong, Baoxiu Mi, Youhong Tang, Matthias Häussler, Hui Tong, Yuping Dong, Jacky W.Y. Lam, Yan Ren, Herman H.Y. Sung, Kam S. Wong, Ping Gao, Ian D. Williams, Hoi Sing Kwok, Ben Zhong Tang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

374 Citations (Scopus)

Abstract

We synthesized a group of silole regioisomers 1x,y, whose photoluminescence varied dramatically with its regiostructure. By internally hindering the intramolecular rotation, we succeeded in creating a novel silole (13,4) that is strongly luminescent in solutions and whose fluorescence quantum yield in acetone is as high as 83%. We revealed that 1 3,4 was a sensitive chemosensor capable of optically discriminating nitroaromatic regioisomers of p-, o-, and m-nitroanilines. Against general belief, crystal formation of 12,4 blue-shifted its emission color and boosted its emission efficiency. The light-emitting diode based on the crystal of 12,4 emitted a strong blue light (464 nm) in a high current efficiency (5.86 cd/A).

Original languageEnglish
Pages (from-to)10061-10066
Number of pages6
JournalJournal of Physical Chemistry B
Volume109
Issue number20
DOIs
Publication statusPublished - 26 May 2005
Externally publishedYes

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