• Vimal K Jain

      Articles written in Journal of Chemical Sciences

    • Synthesis and characterization of single-source molecular precursors for the preparation of metal chalcogenides

      Vimal K Jain

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      Metal chalcogenides constitute an important family of functional materials. Subtle changes in shape, size and phase of these materials result in variations in physical properties (e.g. electronic and optical), which can be exploited for various technological applications. Several strategies have evolved recently for controlling shape, size and phase of these materials. This work discusses design and synthesis of single-source molecular precursors for the preparation of metal chalcogenides both in bulk and nano-size regime. Precursors for palladium chalcogenides, indium sulphides andII–VI materials are presented. Synthesis of a variety of palladium(II)/platinum(II) complexes with internally functionalised chalcogenolate ligands, selenocarboxylates; gallium and indium dithiolate complexes and zinc/cadmium/ mercury complexes with N,N′-dimethylaminoalkylselenolate ligands and their characterization by NMR and X-ray crystallography are also discussed. Data on thermal behaviour of a few representative complexes, [Pd(SeCOAr)2(PR3)2], [PdCl(E∩N)(PR3)], [InMe2(S∩S)], [In(S∩S)3] and [M(E(CH2)nNMe2)2] (M = Zn, Cd, Hg;n = 2 or 3) are presented.

    • Gallium(III) and indium(III) dithiolate complexes: Versatile precursors for metal sulfides

      Shamik Ghoshal Vimal K Jain

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      The chemistry of classical and organometallic complexes of gallium and indium with dithiolate ligands, i.e., dithiocarboxylates, xanthates, dithiocarbamates, dithiophosphates, dithiophophinates and dithioarsenates, has been reviewed. Synthesis, spectroscopic and structural aspects of these complexes are described. Their emerging role as single source molecular precursors for the preparation of metal sulfide thin films and nano-particles has been discussed.

    • Tris(dithiocarboxylato)indium(III): Thermal studies and crystal structure of [In(S2Ctol)3]

      Shamik Ghoshal Nisha P Kushwah Manoj K Pal Vimal K Jain Munirathinam Nethaji

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      Tris(dithiocarboxylato)indium(III), [In{S2CAr}3] (Ar = phenyl or 𝑝-tolyl) have been synthesized and characterized. The molecular structure of [In(S2Ctol)3] established by single crystal X-ray diffraction revealed a distorted octahedral geometry with symmetrically chelating dithiocarboxylate groups. These complexes on thermolysis gave 𝛽-In2S3 which was characterized by XRD and EDX.

    • Organo-gallium and indium complexes with dithiolate and oxo ligands: Synthesis, structures and applications

      Vimal K Jain Amey Wadawale Nisha P Kushwah Manoj K Pal

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      The chemistry of organo-gallium and indium complexes with dithiolate and internally functionalised oxo ligands has been explored. With 1,1-dithiolate ligands both classical and organometallic complexes of gallium and indium, [M(S$^\cap$S)3], [RM(S$^\cap$S)2] and [R2M(S$^\cap$S)] (where R = Me or Et; M = Ga or In; S$^\cap$S = RCS2, ROCS2, R2NCS2 and (RO)2PS2) have been isolated. Reactions of internally functionalised oxo ligands with R3MR$\cdot$OEt2 afforded diorganometal complexes [R2ML]$_n$. Molecular structures of several of these complexes have been established by single crystal X-ray diffraction analyses. Complexes derived from oxo ligands showed photoluminescence. They have been used as alkylating agents for C-C coupling reactions of aryl bromides in the presence of PdCl2(PPh3)2. Indium dithiolate complexes have been used as molecular precursors for the preparation of mono dispersed ẞ-In2S3 nanoparticles.

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