Discotic metallomesogens: Effects of sidechains density in transition metal Bis(beta-diketonate) complexes

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/28425

Title:	Discotic metallomesogens: Effects of sidechains density in transition metal Bis(beta-diketonate) complexes
Authors:	Fan,PC;Lai,CK
Contributors:	中央大學
Keywords:	LIQUID-CRYSTALLINE POLYMER;MOLECULAR-STRUCTURE;COLUMNAR MESOPHASE;BETA-DIKETONES;PHASES;COPPER(II);VANADYL;MESOMORPHISM;INDUCTION;PALLADIUM
Date:	1996
Issue Date:	2010-06-29 19:48:39 (UTC+8)
Publisher:	化學研究所
Abstract:	The preparation and mesogenic properties of a series of discotic beta-diketonate metal complexes are reported. The results show that the density of side chains, positions of side chains, and the geometries of the metal centers play important roles in determining the mesomorphic behaviors and thermodynamic stability of these complexes. In the series of copper complexes 3, all these disc-like molecules with eight alkoxy side chains exhibit columnar hexagonal disordered (D-bd) mesophases. In the series of copper complexes 2 with six side chains, only compounds substituted with longer alkoxy chains (n = C-14 or C-16) exhibit discotic columnar mesophase. However, in the series of complexes 1, only crystal-to-isotropic transitions were observed. The results showed that induction of liquid crystallinity not only depends on the numbers of side chains (i.e. side chain density), but also on the degree of distribution over the central core. Palladium complexes analogs exhibit similar discotic mesophases, and due to their greater core-core organization, they also have higher clearing points and wider temperature range of mesophases than copper complexes.
Relation:	JOURNAL OF THE CHINESE CHEMICAL SOCIETY
Appears in Collections:	[Graduate Institute of Chemistry] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	563	View/Open

社群 sharing

Loading...