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HomeKey Engineering MaterialsKey Engineering Materials Vol. 842Synthesis and Aggregation-Induced Emission Feature...

Synthesis and Aggregation-Induced Emission Feature of Series of Polysiloxanes Containing Triphenylpyrrole Side-Chain

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Abstract:

A series of aggregation-induced emission (AIE) active polysiloxanes (P7-1~P7-2, P29-1~P29-6) were prepared through hydrosilylation between polymethylhydrosiloxane (PMHS, DP=7 or 29) and AIE-active vinyl monomer 1-(4'-allyloxy-biphenyl)-2,5-diphenyl pyrrole (M-TPP), or with optical active monomer cholesteryl allyloxy ether (M-Chol^*). Monomer M-TPP and all of the polymers exhibits aggeragation-induced emission enhancement properties. The fluorescence intensity of M-TPP in THF/H₂O mixtures increases when the water fraction is higher than 60%, while is over 20% for polysiloxanes, which mainly because the entanglement of the flexible polysiloxane main-chain can restrict the molecular motion of triphenylpyrrole (TPP) derivates and induce the increasing of the fluorescence intensity. Moreover, the maximum relative fluorescence intensity (I/I₀) is equal to 4 for M-TPP and 1.4~4.9 for polysiloxanes, and the grafted degree of the TPP derivative has effect on the AIE properties of polymers. The specific optical rotations of the chiral polymers increase with increasing the content of chiral cholesteryl ether moieties. All the target polymers possess good thermal stabilities and their decomposition points (T_d) are greater than 320°C.

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Periodical:

Key Engineering Materials (Volume 842)

Pages:

47-52

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.842.47

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Online since:

May 2020

Authors:

Yin Yin, Li Chao Dong, Na Jin, Yan Guan, Jun Ge Zhi*, Wen Sheng Deng

Keywords:

Aggregation-Induced Emission, Optical Active Polymers, Polysiloxane, Triphenylpyrrole Side-Chain

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© 2020 Trans Tech Publications Ltd. All Rights Reserved

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