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Synthesis, Characterization, and the Photochromic, Luminescence, Metallogelation and Liquid‐Crystalline Properties of Multifunctional Platinum(II) Bipyridine Complexes
Author(s) -
Li Yongguang,
Tam Anthony YiuYan,
Wong Keith ManChung,
Li Wen,
Wu Lixin,
Yam Vivian WingWah
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201003738
Subject(s) - differential scanning calorimetry , photochromism , thermogravimetry , thermotropic crystal , lamellar structure , chemistry , infrared spectroscopy , luminescence , platinum , materials science , crystallography , polymer chemistry , photochemistry , organic chemistry , inorganic chemistry , polymer , catalysis , liquid crystalline , physics , optoelectronics , thermodynamics
A series of multifunctional platinum(II) bipyridine complexes were designed, synthesized, and characterized by 1 H NMR, fast atom bombardment mass spectrometry (FAB‐MS), and elemental analysis. Their electrochemical and photophysical properties were investigated. The photochromic properties of the spironaphthoxazine‐containing complexes were also studied. Some of these complexes were shown to be capable of forming stable thermoreversible metallogels in organic solvents. In contrast to typical thermotropic organogels and metallogels, one of the complexes could form metallogels in dodecane and is very stable towards external stimuli. The photochromic activation parameters for the bleaching reaction of a representative spironaphthoxazine‐containing complex in a dodecane gel were determined through kinetic studies at various temperatures. Lamellar liquid‐crystalline behavior was also observed in one of the complexes, and the liquid‐crystalline properties were studied by thermogravimetry analysis (TGA), polarized optical microscopy (POM), differential scanning calorimetry (DSC), variable‐temperature X‐ray diffraction (XRD), and variable‐temperature infrared (IR) spectroscopy.