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Synthesis, Characterization, Self‐Assembly, Gelation, Morphology and Computational Studies of Alkynylgold(III) Complexes of 2,6‐Bis(benzimidazol‐2′‐yl)pyridine Derivatives
Author(s) -
Yim KingChin,
Lam Elizabeth SukHang,
Wong Keith ManChung,
Au Vonika KaMan,
Ko ChiChiu,
Lam Wai Han,
Yam Vivian WingWah
Publication year - 2014
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.201402876
Subject(s) - pyridine , transmission electron microscopy , crystallography , chemistry , absorption spectroscopy , absorption (acoustics) , characterization (materials science) , self assembly , morphology (biology) , scanning electron microscope , metal , proton nmr , stereochemistry , materials science , nanotechnology , organic chemistry , optics , physics , biology , composite material , genetics
A novel class of alkynylgold(III) complexes of the dianionic ligands derived from 2,6‐bis(benzimidazol‐2′‐yl)pyridine (H 2 bzimpy) derivatives has been synthesized and characterized. The structure of one of the complexes has also been determined by X‐ray crystallography. Electronic absorption studies showed low‐energy absorption bands at 378–466 nm, which are tentatively assigned as metal‐perturbed π–π* intraligand transitions of the bzimpy 2− ligands. A computational study has been performed to provide further insights into the nature of the electronic transitions for this class of complexes. One of the complexes has been found to show gelation properties, driven by π–π and hydrophobic–hydrophobic interactions. This complex exhibited concentration‐ and temperature‐dependent 1 H NMR spectra. The morphology of the gel has been characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM).