The redox interaction between the vanadyl cation and tris[6-(2-hydroxymethyl)pyridylmethyl]amine

Reaction of tris[6-(2-hydroxymethyl)pyridylmethyl]amine, tpa(OH)(3), with (VOSO4)-O-IV center dot 5H(2)O resulted in an unexpected redox reaction producing [(VLH)-L-III][(VLH2)-L-III][PF6](3)center dot 1.5H(2)O (where H3L is bis(2-hydroxymethylpyridyl)(2-carboxypyridylmethyl)amine). This reaction is interesting in the light of the ability of ascidians to accumulate V-III by reduction of V-V from sea water. It also provides additional proof to the susceptibility of pyridylmethylamines to oxidation by certain metal ions. (C) 2012 Elsevier B. V. All rights reserved.