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Citation: CHEN Lie, KONG Huanling, CHEN Yiwang, LI Fan. Synthesis of Liquid Crystalline Polyacetylene Containing Chiral Terphenyl and Its “Jacket Effect”[J]. Chinese Journal of Applied Chemistry, ;2012, 29(11): 1231-1239. doi: 10.3724/SP.J.1095.2012.00549 shu

Synthesis of Liquid Crystalline Polyacetylene Containing Chiral Terphenyl and Its “Jacket Effect”

CHEN Lie ^a ,
KONG Huanling ^a ,
CHEN Yiwang ^a,b,, ,
LI Fan ^a

1.
a Institute of Polymers, Nanchang University, Nanchang 330031, China;
2.
b Department of Chemistry, Nanchang University, Nanchang 330031, China

Corresponding author: CHEN Yiwang,
Received Date: 12 December 2011
Available Online: 19 January 2012
Fund Project: 国家自然科学基金(51073076,51003045)资助项目 (51073076,51003045)

A monomer has been designed,synthesized and polymerized with[Rh(nbd)Cl]₂-Et₃N(nbd:2,5-norbonadien) catalyst.The liquid crystalline polyacetylene bearing chiral terphenyl mesogen {-[(CHC(CH₂)₃OCO-terphenyl(OR^*)₂]_n-,R^*=(S)-2-methylbutyl,(PAM₃OCO(TPh)(OR^*)₂)} was obtained in high molecular mass(mass-average relative molecular mass is 30300).The monomer shows enantiotropic smectic C(SmC^*) phase by introducing chiral groups and terphenyl mesogen,while its corresponding polymer exhibits enantiotropic smectic A(SmA^*) liquid crystalline behavior.The "jacket effect" induced by the terphenyl mesogen linked at mass center position endows the polymer with high thermal stability(356℃),high photoluminescence and aggregation-induced emission enhancement(AIEE).Upon UV irradiation,the light-emitting of the solid state of the polymer fabricated at room temperature is stronger than that of the dilute solution,and its internal quantum efficiency and external quantum efficiency are 0.214 and 0.023,respectively.Photoluminescence of the polymer quenched from the liquid crystalline state of is obviously stronger and red-shifted than those of the solution and thin film states under excitation at the ultraviolet wavelength.
- polyacetylene,
- liquid crystal,
- chirality,
- photoluminescence,
- "Jacket effect"
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