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Properties of a dinuclear Mn(III,III) complex with a tri-phenolate ligand N4O3 (3-) and a new complex containing a ligand covalently linked to ruthenium tris-bipyridine
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2004 (English)In: Huaxue xuebao, ISSN 0567-7351, Vol. 62, no 9, 916-922 p.Article in journal (Refereed) Published
Abstract [en]

A new high valent complex [Mn-2(III, III)L(mu-OAc)(2)].PF6 (2a) was prepared, where L was the trianion of 2, 6-bis {[(2-hydroxy-5-tert-butylbenzyl) (pyridyl-2-methyl)-amino]-methyl}-4-methylphenol, which contains two additional phenolate groups and two tert-butyl groups compared to its parent [Mn-2(II, II)(bpmp)(mu-OAc)(2)].ClO4 (1). These improvements narrowed the disparity between the new model and (Mn)(4) cluster (OEC in nature). Moreover, L was modified to be covalently linked with Ru(II) tris-bipyridine through an amide bond to construct a complex 2b for the study of photoinduced electron transfer (PET). UV-vis, IR, emission spectra and electrochemistry were used to investigate their photochemistry properties. The results showed that 2b has good photochemistry properties and the E-1/2 of Ru3+/Ru2+ was higher than those of phenol(+)/phenol and Mn(III, IV)/Mn(III, III). After coordination of manganese ions, the electron transfer process in the model complex conforms to the basic principles of electron donor side of photosystem II (PS II) in nature.

Place, publisher, year, edition, pages
2004. Vol. 62, no 9, 916-922 p.
Keyword [en]
dinuclear manganese, ruthenium( II) tris-bipyridine, artificial photosynthesis, PSII, phenolate ligand, intramolecular electron-transfer, photosynthetic water oxidation, photosystem-ii, manganese complexes, oxygen, mechanism, mn, reactivity, cluster, models
URN: urn:nbn:se:kth:diva-23411ISI: 000221419800013OAI: diva2:342109
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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