Abstract
A dimer-of-dimers model compound for the oxygen-evolving complex of photosystem II, [{(H2O)-(terpy)MnIV(μ-O) 2MnIV(terpy)}2(μ-O)](CIO4) 6 (terpy = 2,2′:6′,2″-terpyridine), has been prepared and characterized by X-ray crystallography and ESI-MS. Low pH was found to promote the disproportionation of [MnIII/IV 2O2(terpy)2(OH2)2] 3+ to Mn2+ and a MnIV/IV2O 2(terpy)2 species; the latter complex slowly dimerizes to form the title complex. Protonation of a μ-oxo bridge is proposed to initiate the disproportionation, based on analogy with the [Mn III/IV2O2(bpy)4]3+ system.
| Original language | English |
|---|---|
| Pages (from-to) | 7345-7349 |
| Number of pages | 5 |
| Journal | Journal of the American Chemical Society |
| Volume | 126 |
| Issue number | 23 |
| DOIs | |
| Publication status | Published - Jun 16 2004 |
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- Chemistry(all)
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Dimer-of-dimers model for the oxygen-evolving complex of photosystem II. Synthesis and properties of MnIV4O5(terpy) 4(H2O)2](CIO4)6. / Chen, Hongyu; Faller, J. W.; Crabtree, Robert H.; Brudvig, Gary W.
In: Journal of the American Chemical Society, Vol. 126, No. 23, 16.06.2004, p. 7345-7349.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Dimer-of-dimers model for the oxygen-evolving complex of photosystem II. Synthesis and properties of MnIV4O5(terpy) 4(H2O)2](CIO4)6
AU - Chen, Hongyu
AU - Faller, J. W.
AU - Crabtree, Robert H.
AU - Brudvig, Gary W
PY - 2004/6/16
Y1 - 2004/6/16
N2 - A dimer-of-dimers model compound for the oxygen-evolving complex of photosystem II, [{(H2O)-(terpy)MnIV(μ-O) 2MnIV(terpy)}2(μ-O)](CIO4) 6 (terpy = 2,2′:6′,2″-terpyridine), has been prepared and characterized by X-ray crystallography and ESI-MS. Low pH was found to promote the disproportionation of [MnIII/IV 2O2(terpy)2(OH2)2] 3+ to Mn2+ and a MnIV/IV2O 2(terpy)2 species; the latter complex slowly dimerizes to form the title complex. Protonation of a μ-oxo bridge is proposed to initiate the disproportionation, based on analogy with the [Mn III/IV2O2(bpy)4]3+ system.
AB - A dimer-of-dimers model compound for the oxygen-evolving complex of photosystem II, [{(H2O)-(terpy)MnIV(μ-O) 2MnIV(terpy)}2(μ-O)](CIO4) 6 (terpy = 2,2′:6′,2″-terpyridine), has been prepared and characterized by X-ray crystallography and ESI-MS. Low pH was found to promote the disproportionation of [MnIII/IV 2O2(terpy)2(OH2)2] 3+ to Mn2+ and a MnIV/IV2O 2(terpy)2 species; the latter complex slowly dimerizes to form the title complex. Protonation of a μ-oxo bridge is proposed to initiate the disproportionation, based on analogy with the [Mn III/IV2O2(bpy)4]3+ system.
UR - http://www.scopus.com/inward/record.url?scp=2942528725&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=2942528725&partnerID=8YFLogxK
U2 - 10.1021/ja037389l
DO - 10.1021/ja037389l
M3 - Article
C2 - 15186173
AN - SCOPUS:2942528725
VL - 126
SP - 7345
EP - 7349
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 23
ER -