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2-Pyridyl selenolates of antimony and bismuth: Synthesis, characterization, structures and their use as single source molecular precursor for the preparation of metal selenidenanostructures and thin films†
Rakesh K. Sharma,G. Kedarnath,Vimal K. Jain,Amey Wadawale,Manoj Nalliath,C. G. S. Pillai,B. Vishwanadh
Dalton Transactions Pub Date : 08/12/2010 00:00:00 , DOI:10.1039/C0DT00263A
Abstract

Reactions of SbCl3 and BiCl3 with M′Se–C5H3(R-3)N (M′ = Li or Na; R = H or Me) gave homoleptic selenolate complexes of the general formula [M{Se–C5H3(R-3)N}3] (M = Sb or Bi). The complexes were characterized by elemental analysis, UV-vis and NMR (1H, 13C and 77Se) spectroscopy. The single crystal X-ray analysis of [M{Se–C5H3(Me-3)N}3]·nH2O (M/n = Sb/1.5 and Bi/0.5) revealed that the antimony complex adopts a trigonal pyramidal configuration with monodentate selenolate ligands while the bismuth analogue acquires a distorted square pyramidal configuration defined by two chelating and one monodentate selenolate groups. Pyrolysis of [M{Se–C5H3(Me-3)N}3] either in a furnace or in hexadecylamine (HDA) at different temperatures gave a variety of M2Se3 nanostructures. Thin films of metal selenides have also been deposited on glass substrate by aerosol-assisted chemical vapor deposition (AACVD). Both nanostructures and thin films of metal selenides were characterized by UV-vis spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and transmission electron microscopy (TEM).

Graphical abstract: 2-Pyridyl selenolates of antimony and bismuth: Synthesis, characterization, structures and their use as single source molecular precursor for the preparation of metal selenide nanostructures and thin films
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