Synthesis of 3,5-bis(phosphonomethyl)benzoic acid and its application as a metal oxide surface bivalent anchor
作者:Bassam M. Nakhle、Scott A. Trammell、Keith M. Sigel、Thomas J. Meyer、Bruce W. Erickson
DOI:10.1016/s0040-4020(99)00062-9
日期:1999.3
A protected form of 3,5-bis(phosphonomethyl)benzoic acid (Bpb-OH), a metal oxide surface bivalent anchor, has been synthesized, coupled to an amine functionality, deprotected, and shown to bind to metal oxide surfaces. The protected anchor, 3,5-bis(dimethoxyphosphinylmethyl)benzoic acid (Me(4)Bpb-OH) was synthesized in 23% yield over four steps, coupled to a proline-chromophore, deprotected with a solution of iodotrimethylsilane (TMSI) in acetonitrile and adsorbed to Tin(IV)-doped indium oxide and nanocrystalline TiO2 electodes at surface coverages of 1.5 x 10(-10) mol cm(-2) and 4.9 x 10(-11) mol cm(-2), respectively. Finally, Me(4)Bpb-OH was converted to an amino derivative by attaching a diamino butane linker. (C) 1999 Elsevier Science Ltd. All rights reserved.