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First diphosphinoamine ligand bearing a polymerizable side chain: Complexation with copper(I)

Ahuja, Ritu and Samuelson, Ashoka G (2005) First diphosphinoamine ligand bearing a polymerizable side chain: Complexation with copper(I). In: Journal of Polymer Science Part A: Polymer Chemistry, 43 (15). pp. 3411-3420.

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Abstract

A diphosphinoamine ligand with a polymerizable side chain,$(PPh_{2})_{2}N-CH_{2}-C_{6}H_{4}-CH=CH_{2}$ (vbzpnp or 1), was synthesized. The ligand could be polymerized by anionic polymerization with n-butyllithium as the initiator. Polyvbzpnp was soluble in tetrahydrofuran and chloroform but was insoluble in methanol and was characterized with NMR, IR, and gel permeation chromatography. The number-average and weight-average molecular weights were 40,050 and 55,690, respectively, and the polydispersity index was 1.39. $[Cu(CH_{3}CN)_{4}]ClO_{4}$ formed a hischelated complex with the monomer and produced $[CU(1)_{2}]ClO_{4}(2)$, and CuCl formed a tetramer, $Cu_{4}(1)_{2}Cl_{4}(3)$. All the compounds (1, 2, and 3) were characterized with single-crystal structure determination, NMR, and IR spectroscopy. The addition of $[Cu(CH_{3}CN)_{4}]ClO_{4}$ to polyvbzpnp resulted in an insoluble crosslinked polymer, which was characterized with solid-state $^{31}P{^{1}H}$ magic-angle-spinning NMR. The copolymerization of styrene and 1 produced a styrene-vbzpnp copolymer that was found to be soluble in common organic solvents.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to John Wiley & Sons Inc.
Keywords: anionic polymerization;copper(I);crosslinking;diphosphinoamine;gel permeation chromatography (GPC)
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 22 Aug 2005
Last Modified: 19 Sep 2010 04:19
URI: http://eprints.iisc.ernet.in/id/eprint/3534

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