Highly Dichroic Metallomesogen of Dinuclear Platinum Complex: Synthesis and Liquid Crystal and Photophysical Properties

• Published in: Journal of physical chemistry. C Vol. 116; no. 9; pp. 5908 - 5914
• Main Authors: Wang, Yafei, Chen, Qing, Li, Yanhu, Liu, Yu, Tan, Hua, Yu, Junting, Zhu, Meixiang, Wu, Hongbin, Zhu, Weiguo, Cao, Yong
• Format: Journal Article
• Language: English
• Published: Columbus, OH American Chemical Society 08.03.2012
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Photoluminescence; Physics; Mesophases; Quantum yield; Liquid crystals; Hole mobility; Photoluminescence; Platinum complexes
• ISSN: 1932-7447; 1932-7455
• DOI: 10.1021/jp211976x

A novel dinuclear platinum complex of (biC12ppy-fl)Pt2C12DBM)2 with liquid crystal luminescent property has been prepared, as well as its liquid crystal, optophysical properties and hole mobility have been studied, where biC12ppy-fl is 6,6′-[4,4′-(9,9-didodecyl-9H-fluorene-2,7-diyl)bis(1,4-phenylene)]bis[3-(dodecyloxymethyl)pyridine] and C12DBM is 1,3-bis[4-(dodecyloxy)phenyl]propane-1,3-dione. This dinuclear platinum complex displayed a smectic mesophase and excellent opto-physical properties. Compared to the reported mononuclear platinum complex of (C n ROppy)Pt(acac) (R = H, F), this dinuclear platinum complex exhibited higher emission quantum yield and higher stability, as well as higher hole mobility of 8.4 × 10–4 cm2/(V s). Moreover, a highly polarized ratio of 10.3 was obtained for the aligned film of (biC12ppy-fl)Pt2(C12DBM)2 on the aligned polyimide at room temperature.