meso-tetrakis(4-N-benzylpyridyl)porphyrin and its supramolecular complexesformed with anionic metal-oxo cluster: spectroscopy and electrocatalytic reduction of dioxygen
Sq. Liu et al., meso-tetrakis(4-N-benzylpyridyl)porphyrin and its supramolecular complexesformed with anionic metal-oxo cluster: spectroscopy and electrocatalytic reduction of dioxygen, INORG CHIM, 306(1), 2000, pp. 87-93
The research results show that MTBPyP (meso-tetrakis(4-N-benzylpyridyl)porp
hyrin, M = H-2, Zn) bearing quadruply positive charges associates with an a
nionic metal-ore cluster (SiW12O404-) to form a supramolecular complex in a
queous solution. The spectral evolution and Job's plots reveal that the agg
regates contain equal numbers of the cationic porphyrins and the anionic Si
W12O404-. The association is accompanied by significant changes in the Sore
t band of the individual porphyrins. The 1:1 supramolecular complex [CoTBPy
P][SiW12O40] may serve as an electrocatalyst for electrocatalytic reduction
of O-2, and more of O-2 is reduced to H2O at potential where the SiW12O404
- is in reduced state. (C) 2000 Elsevier Science S.A. All rights reserved.