title: Structural control of the photoluminescence of silole regioisomers and their utility as sensitive regiodiscriminating chemosensors and efficient electroluminescent materials.
abstract: We synthesized a group of silole regioisomers 1(x,y), whose photoluminescence varied dramatically with its regiostructure. By internally hindering the intramolecular rotation, we succeeded in creating a novel silole (1(3,4)) 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 1(2,4) blue-shifted its emission color and boosted its emission efficiency. The light-emitting diode based on the crystal of 1(2,4) emitted a strong blue light (464 nm) in a high current efficiency (5.86 cd/A).
authors.affiliation: Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Li
authors.forename: Yongqiang
authors.initials: Y
authors.lastname: Dong
authors.forename: Baoxiu
authors.initials: B
authors.lastname: Mi
authors.forename: Youhong
authors.initials: Y
authors.lastname: Tang
authors.forename: Matthias
authors.initials: M
authors.lastname: Häussler
authors.forename: Hui
authors.initials: H
authors.lastname: Tong
authors.forename: Yuping
authors.initials: Y
authors.lastname: Dong
authors.forename: Jacky W Y
authors.initials: JW
authors.lastname: Lam
authors.forename: Yan
authors.initials: Y
authors.lastname: Ren
authors.forename: Herman H Y
authors.initials: HH
authors.lastname: Sung
authors.forename: Kam S
authors.initials: KS
authors.lastname: Wong
authors.forename: Ping
authors.initials: P
authors.lastname: Gao
authors.forename: Ian D
authors.initials: ID
authors.lastname: Williams
authors.forename: Hoi Sing
authors.initials: HS
authors.lastname: Kwok
authors.forename: Ben Zhong
authors.initials: BZ
authors.lastname: Tang