Columnar mesophases from half-discoid platinum cyclometalated metallomesogens

TitleColumnar mesophases from half-discoid platinum cyclometalated metallomesogens
Publication TypeJournal Article
Year of Publication2008
AuthorsVenkatesan, K, Kouwer, PHJ, Yagi, S, M\├╝ller, P, Swager, TM
JournalJournal of Materials Chemistry
Volume18
Pagination400
ISSN0959-9428
Keywordscrystal structure platinum pyridinyl hydroxypropenone complex deriv, liq crystal transitions luminescence platinum pyridinyl hydroxypropenone complex deriv, mol structure platinum pyridinyl hydroxypropenone complex deriv
Abstract

A series of liq. crystals have been synthesized and studied based upon mononuclear ortho-platinated rod-like heteroarom. and 1,3-diketonate ligands. The liq. cryst. properties of these mols. were investigated using polarized light optical microscopy, differential scanning calorimetry, single crystal x-ray diffraction, and powder x-ray diffraction. Increasing the no. of alkyl chains attached to the 1,3-diketonate units resulted in a transition from lamellar (SmA) to hexagonal columnar phases (Colh). The 2-thienylpyridine units were previously unexplored in metallomesogenic complexes and these studies extend the utility of ortho-platinated 2-phenylpyridines and 2-thienylpyridines to produce columnar liq. cryst. phases. The platinum complexes all display photoluminescence and are of interest for electrooptical applications. [on SciFinder(R)]

URLhttp://xlink.rsc.org/?DOI=b714291a
DOI10.1039/b714291a