SYNTHESIS AND MESOMORPHIC PROPERTIES OF PALLADIUM CHELATES OF LIQUID CRYSTAL POLYSILOXANE WITH β-DIKETONE-BASED SIDE CHAINS

ZHOU Zhaohui; DAI Daorong; ZHANG Rongben

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SYNTHESIS AND MESOMORPHIC PROPERTIES OF PALLADIUM CHELATES OF LIQUID CRYSTAL POLYSILOXANE WITH β-DIKETONE-BASED SIDE CHAINS

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- SYNTHESIS AND MESOMORPHIC PROPERTIES OF PALLADIUM CHELATES OF LIQUID CRYSTAL POLYSILOXANE WITH β-DIKETONE-BASED SIDE CHAINS
- Vol. 10, Issue 1, Pages: 70-74(1992)
- Affiliations：
  
  1. Institute of Chemistry, Academia Sinica,Beijing,100080
  2.   Academia Sinica
  3.   Beijing
  4.   100080
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：20 March 1992
- Accepted：
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[1]周朝晖,戴道荣,张榕本.SYNTHESIS AND MESOMORPHIC PROPERTIES OF PALLADIUM CHELATES OF LIQUID CRYSTAL POLYSILOXANE WITH β-DIKETONE-BASED SIDE CHAINS[J].Chinese Journal of Polymer Science,1992,{4}(01):70-74.

ZHOU Zhaohui, DAI Daorong, ZHANG Rongben. SYNTHESIS AND MESOMORPHIC PROPERTIES OF PALLADIUM CHELATES OF LIQUID CRYSTAL POLYSILOXANE WITH β-DIKETONE-BASED SIDE CHAINS[J]. 1992, 10(1): 70-74.
[1]周朝晖,戴道荣,张榕本.SYNTHESIS AND MESOMORPHIC PROPERTIES OF PALLADIUM CHELATES OF LIQUID CRYSTAL POLYSILOXANE WITH β-DIKETONE-BASED SIDE CHAINS[J].Chinese Journal of Polymer Science,1992,{4}(01):70-74. DOI：

ZHOU Zhaohui, DAI Daorong, ZHANG Rongben. SYNTHESIS AND MESOMORPHIC PROPERTIES OF PALLADIUM CHELATES OF LIQUID CRYSTAL POLYSILOXANE WITH β-DIKETONE-BASED SIDE CHAINS[J]. 1992, 10(1): 70-74. DOI：

摘要

正

A new type of palladium chelate of β-diketone-based side chain liquid crystal polysiloxane （Pd-DKLCP） has been synthesized by chelation reaction of palladium dichloride with polymeric ligand

β-diketone polysiloxane （DKLCP）

using THF as solvent at R.T.. The Pd-chelation results in greatly increasing the phase transition temperature T

and the enthalpy change △H

from crystal to liquid crystal state and making the temperature range of LC state △T(△T=T

-T

) widened. All these chelates Pd-DKLCP’s do not show T

until decomposition at 205℃. It is noteworthy that the Pd-chelation can exert more positive effect on the mesomorphic behaviour of the polymer ligand than the counterpart Cu-DKLCP does. It is probable due to the bigger size of disc-like mesogen formed from β-diketone and Pd

ion with 4d orbital.

Abstract

A new type of palladium chelate of β-diketone-based side chain liquid crystal polysiloxane （Pd-DKLCP） has been synthesized by chelation reaction of palladium dichloride with polymeric ligand

β-diketone polysiloxane （DKLCP）

using THF as solvent at R.T.. The Pd-chelation results in greatly increasing the phase transition temperature T

and the enthalpy change △H

from crystal to liquid crystal state and making the temperature range of LC state △T(△T=T

-T

) widened. All these chelates Pd-DKLCP’s do not show T

ion with 4d orbital.

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