Mesomorphic Behaviour of Hemin Based Porphyrin Liquid Crystals: Structure and Temperature Dependent Intracolumnar Order

Autor:	Antoni Segade, Francisco López-Calahorra, Dolores Velasco
Rok vydání:	2005
Předmět:	Discotic liquid crystal Mesophase Free base General Chemistry Condensed Matter Physics Photochemistry Porphyrin chemistry.chemical_compound Crystallography Order (biology) chemistry Liquid crystal Molecule General Materials Science Hemin
Zdroj:	Molecular Crystals and Liquid Crystals. 439:201/[2067]-208/[2074]
ISSN:	1563-5287 1542-1406
DOI:	10.1080/15421400590955640
Popis:	A series of porphyrin liquid crystals derived from natural product hemin has been synthesized and its mesomorphic behaviour has been characterized. Free base compounds show a temperature dependent mesophase intracolumnar order, feature that is not observed in the related zinc compounds. This behaviour is tentatively attributed to conformational changes of the flexible parts of the molecule. Semiempirical calculations and energetical considerations that seem to support this hypothesis are presented.
Databáze:	OpenAIRE
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