SYNTHESIS AND MESOGENIC PROPERTY OF Pd-COORDINATING AZO-TYPE SIDE CHAIN LIQUID CRYSTALLINE POLYSILOXANE*

ZHANG Shuyan; BI Siwei; XIE Ping; ZHANG Rongben

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SYNTHESIS AND MESOGENIC PROPERTY OF Pd-COORDINATING AZO-TYPE SIDE CHAIN LIQUID CRYSTALLINE POLYSILOXANE*

Papers | Updated：2021-06-21

- SYNTHESIS AND MESOGENIC PROPERTY OF Pd-COORDINATING AZO-TYPE SIDE CHAIN LIQUID CRYSTALLINE POLYSILOXANE*
- Vol. 10, Issue 4, Pages: 281-286(1992)
- Affiliations：
  
  1. Department of Chemistry , Zhengzhou University) XIE Ping and ZHANG Rongben
  2.   Zhengzhou University
  3.   Institute of Chemistry
  4.   Academia Sinica
  5.   Beijing 100080
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：20 December 1992
- Accepted：
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[1]张淑媛,毕思玮,谢萍,张榕本.SYNTHESIS AND MESOGENIC PROPERTY OF Pd-COORDINATING AZO-TYPE SIDE CHAIN LIQUID CRYSTALLINE POLYSILOXANE[J].Chinese Journal of Polymer Science,1992,{4}(04):281-286.

ZHANG Shuyan, BI Siwei, XIE Ping, et al. SYNTHESIS AND MESOGENIC PROPERTY OF Pd-COORDINATING AZO-TYPE SIDE CHAIN LIQUID CRYSTALLINE POLYSILOXANE*[J]. 1992, 10(4): 281-286.
[1]张淑媛,毕思玮,谢萍,张榕本.SYNTHESIS AND MESOGENIC PROPERTY OF Pd-COORDINATING AZO-TYPE SIDE CHAIN LIQUID CRYSTALLINE POLYSILOXANE[J].Chinese Journal of Polymer Science,1992,{4}(04):281-286. DOI：

ZHANG Shuyan, BI Siwei, XIE Ping, et al. SYNTHESIS AND MESOGENIC PROPERTY OF Pd-COORDINATING AZO-TYPE SIDE CHAIN LIQUID CRYSTALLINE POLYSILOXANE*[J]. 1992, 10(4): 281-286. DOI：

摘要

正

A novel palladium-coordinating Azo-type liquid crystalline polysiloxane （Pd-AZLCP） has been synthesized by chelation reaction of polymeric ligand

Azo-type liquid crystalline polysiloxane（AZLCP）

with palladium dichloride and potassium chloride in the presence of tetrahydrofuran （THF） as reaction medium instead of dioxane/water system

which has been used since Cope first reported the synthesis of palladium-azobenzene in 1965 . The mesogenic behaviors examined by DSC

temperature-variable X-ray diffraction and polarizing microscopy indicate that the incorporation of Pd ions into the liquid crystal polymer can play a positive effect on the mesogenic property of the parent polymeric ligand. It is exhibited that the isotropization temperature T

is increased and the mesophase range ΔT has been widened

too.

Abstract

A novel palladium-coordinating Azo-type liquid crystalline polysiloxane （Pd-AZLCP） has been synthesized by chelation reaction of polymeric ligand

Azo-type liquid crystalline polysiloxane（AZLCP）

with palladium dichloride and potassium chloride in the presence of tetrahydrofuran （THF） as reaction medium instead of dioxane/water system

which has been used since Cope first reported the synthesis of palladium-azobenzene in 1965 . The mesogenic behaviors examined by DSC

is increased and the mesophase range ΔT has been widened

too.

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