6, 6-ジアミノ-2, 2-ビピリジンの化学 : 金属配位子としての機能

概要

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The properties of 6, 6-diamino-2, 2-bipyridine (DABP) as a metal chelating agent are discussed in terms of the electronic and steric effects of the amino groups. Experimental and theoretical studies showed that DABP has higher ability to coordinate metal ions due to the electronic effects of amino groups compared to 2, 2- bipyridine (bpy) but suffers the steric hindrance between coordinated ligands. Synthesis and photochemical properties of a Ru (II) (DABP) 32+ complex are also discussed. Alkylation of the amino groups of DABP gave oil-soluble alkylamino derivatives of bpy, which showed the ability to undergo selective and uphill transport of metal ions through an organic phase by coupling with a proton gradient. Acylamino derivatives of bpy served as a N2O2 tetradentate planer ligand, and, therfore, is expected to serve as a bis (N-salicylidene) ethylenediamine analogue with higher stability.
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