TY - JOUR
T1 - 2,3,4,5-tetraphenylsilole-based conjugated polymers
T2 - Synthesis, optical properties, and as sensors for explosive compounds
AU - Zhang, Li Hong
AU - Jiang, Tao
AU - Wu, Lian Bin
AU - Wan, Jun Hua
AU - Chen, Chih Hsien
AU - Pei, Yong Bing
AU - Lu, Hua
AU - Deng, Yuan
AU - Bian, Gao Feng
AU - Qiu, Hua Yu
AU - Lai, Guo Qiao
PY - 2012/6
Y1 - 2012/6
N2 - A series of linear 2,5-tetraphenylsilole-vinylene-type polymers were successfully synthesized for the first time. The tetraphenylsilole moieties were linked at their 2,5-positions through a vinylene bridge with p-dialkoxybenzenes to obtain polymer PSVB and with 3,6-carbazole to obtain polymer PSVC. For comparison, 2,5-tetraphenylsilole-ethyne-type polymer PSEB was also synthesized, in which the vinylene bridge of PSVB was replaced with an ethyne bridge. Very interestingly, the bridging group (vinylene or ethyne) had a significant effect on the photophysical properties of the corresponding polymers. The fluorescence peak of PSEB at 504 nm in solution originated from the emission of its silole moieties, whereas PSVB and PSVC emitted yellow light and no blueish-green emission from the silole moieties was observed, thus demonstrating that the emissions of PSVB and PSVC were due to their polymer backbones. More importantly, the 2,5-tetraphenylsilole-ethyne polymer exhibited a pronounced aggregation-enhanced emission (AEE) effect but the 2,5-tetraphenylsilole- vinylene polymer was AEE-inactive. Moreover, both AEE-active 2,5-tetraphenylsilole-ethyne polymer and AEE-inactive 2,5-tetraphenylsilole- vinylene polymers were successfully applied as fluorescent chemosensors for the detection of explosive compounds.
AB - A series of linear 2,5-tetraphenylsilole-vinylene-type polymers were successfully synthesized for the first time. The tetraphenylsilole moieties were linked at their 2,5-positions through a vinylene bridge with p-dialkoxybenzenes to obtain polymer PSVB and with 3,6-carbazole to obtain polymer PSVC. For comparison, 2,5-tetraphenylsilole-ethyne-type polymer PSEB was also synthesized, in which the vinylene bridge of PSVB was replaced with an ethyne bridge. Very interestingly, the bridging group (vinylene or ethyne) had a significant effect on the photophysical properties of the corresponding polymers. The fluorescence peak of PSEB at 504 nm in solution originated from the emission of its silole moieties, whereas PSVB and PSVC emitted yellow light and no blueish-green emission from the silole moieties was observed, thus demonstrating that the emissions of PSVB and PSVC were due to their polymer backbones. More importantly, the 2,5-tetraphenylsilole-ethyne polymer exhibited a pronounced aggregation-enhanced emission (AEE) effect but the 2,5-tetraphenylsilole- vinylene polymer was AEE-inactive. Moreover, both AEE-active 2,5-tetraphenylsilole-ethyne polymer and AEE-inactive 2,5-tetraphenylsilole- vinylene polymers were successfully applied as fluorescent chemosensors for the detection of explosive compounds.
KW - aggregation
KW - explosive materials
KW - fluorescence
KW - polymers
KW - sensors
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U2 - 10.1002/asia.201200070
DO - 10.1002/asia.201200070
M3 - Article
C2 - 22529046
AN - SCOPUS:84862557645
VL - 7
SP - 1583
EP - 1593
JO - Chemistry - An Asian Journal
JF - Chemistry - An Asian Journal
SN - 1861-4728
IS - 7
ER -