TY - JOUR
T1 - Vapochromism and crystallization-enhanced emission of 1,1-disubstituted 2,3,4,5-tetraphenylsiloles
AU - Dong, Yongqiang
AU - Lam, Jacky W.Y.
AU - Qin, Anjun
AU - Li, Zhen
AU - Sun, Jingzhi
AU - Dong, Yuping
AU - Tang, Ben Zhong
PY - 2007/12
Y1 - 2007/12
N2 - Effects of solvent vapor on the photoluminescence (PL) of 2,3,4,5-tetraphenylsiloles carrying different 1,1-substituents [(PhC) 4SiRR′, R = Ph, R′ = CH 3 (2); R = Ph, R′ = C≡CH (3); R = R′ = C≡CH (4)] were investigated. The emission of the silole spots on the TLC plates can be turned "off" and "on" continuously and reversibly by wetting by, and de-wetting from, vapors of organic solvents, respectively. After fumigation by solvent vapor, the thin film of 4 coated on the quartz substrate emits stronger and bluer PL owing to the transformation of film morphology from the amorphous to the crystalline phase. Analysis by X-ray diffraction reveals that the molecular conformations of the crystals of 2-4 are locked and stabilized by multiple C-H⋯π hydrogen bonds. This structural rigidification has made the silole crystals stronger emitters.
AB - Effects of solvent vapor on the photoluminescence (PL) of 2,3,4,5-tetraphenylsiloles carrying different 1,1-substituents [(PhC) 4SiRR′, R = Ph, R′ = CH 3 (2); R = Ph, R′ = C≡CH (3); R = R′ = C≡CH (4)] were investigated. The emission of the silole spots on the TLC plates can be turned "off" and "on" continuously and reversibly by wetting by, and de-wetting from, vapors of organic solvents, respectively. After fumigation by solvent vapor, the thin film of 4 coated on the quartz substrate emits stronger and bluer PL owing to the transformation of film morphology from the amorphous to the crystalline phase. Analysis by X-ray diffraction reveals that the molecular conformations of the crystals of 2-4 are locked and stabilized by multiple C-H⋯π hydrogen bonds. This structural rigidification has made the silole crystals stronger emitters.
KW - Aggregation-induced emission
KW - Amorphous
KW - Crystal
KW - Crystallization-enhanced emission
KW - Light emission
KW - Silole
KW - Vapochromism
UR - https://www.scopus.com/pages/publications/35448988123
U2 - 10.1007/s10904-007-9152-1
DO - 10.1007/s10904-007-9152-1
M3 - Article
AN - SCOPUS:35448988123
SN - 1574-1443
VL - 17
SP - 673
EP - 678
JO - Journal of Inorganic and Organometallic Polymers and Materials
JF - Journal of Inorganic and Organometallic Polymers and Materials
IS - 4
ER -