Synthesis and Mesomorphic Properties of Multiynylthiophenes:  2, 3, 4, 5-Tetrakis(4-alkoxyphenylethynyl)thiophenes and 2, 3, 5-Tris(4-alkoxyphenylethynyl)thiophenes

機構典藏 > College of Sciences > Graduate Institute & Department of Chemistry > Journal Article > Item 987654321/25292

Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/25292

Title:	Synthesis and Mesomorphic Properties of Multiynylthiophenes: 2, 3, 4, 5-Tetrakis(4-alkoxyphenylethynyl)thiophenes and 2, 3, 5-Tris(4-alkoxyphenylethynyl)thiophenes
Authors:	徐秀福;Hsu, Hsiu-fu
Contributors:	淡江大學化學學系
Date:	2004-06-15
Issue Date:	2009-12-01
Publisher:	American Chemical Society (ACS)
Abstract:	The synthesis and characterization of multiynylthiophenes, tetrakis(4-alkoxyphenylethynyl)thiophenes (1) and tris(4-alkoxyphenylethynyl)thiophenes (2), are reported, and their structure−mesomorphism relationship is discussed. The tetraynyl series 1 with a trapezoid core do not show any liquid-crystalline properties. With one less peripheral arm, series 2 compounds are of the Y-shape geometry with rigid linear spacers and nematic phases are observed for the octyloxyl, decyloxyl, and dodecyloxyl derivatives. Although the dipole−dipole interactions, desymmetrization, and disparity of the mesogenic cores can be accountable for their corresponding mesomorphic behaviors, the formation of the nematic phases of 2 may be most likely attributed to the shape disparity of these two series of compounds.
Relation:	Chemistry of materials 16(12), pp.2379-2385
DOI:	10.1021/cm030612t
Appears in Collections:	[Graduate Institute & Department of Chemistry] Journal Article

Files in This Item:

File	Description	Size	Format
		0Kb	Unknown	285	View/Open
Synthesis and Mesomorphic Properties of Multiynylthiophenes 2 3 4 5-Tetrakis(4-alkoxyphenylethynyl)thiophenes and 2 3 5-Tris(4-alkoxyphenylethynyl)thiophenes.pdf		601Kb	Adobe PDF	2	View/Open