The effect of protonation on [Mn(IV)(μ 2 -O)] 2 complexes
dc.contributor.author | Baldwin, Michael J. | en_US |
dc.contributor.author | Gelasco, Andrew | en_US |
dc.contributor.author | Pecoraro, Vincent L. | en_US |
dc.date.accessioned | 2006-09-08T21:32:45Z | |
dc.date.available | 2006-09-08T21:32:45Z | |
dc.date.issued | 1993-01 | en_US |
dc.identifier.citation | Baldwin, Michael J.; Gelasco, Andrew; Pecoraro, Vincent L.; (1993). "The effect of protonation on [Mn(IV)(μ 2 -O)] 2 complexes." Photosynthesis Research 38(3): 303-308. <http://hdl.handle.net/2027.42/43535> | en_US |
dc.identifier.issn | 0166-8595 | en_US |
dc.identifier.issn | 1573-5079 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/43535 | |
dc.description.abstract | The series of complexes [Mn(IV)(X-SALPN)(μ 2 -O)] 2 , 1 : X=5-OCH 3 ; 2 : X=H; 3 : X=5-Cl; 4 : X=3,5-diCl; 5 : X=5-NO 2 , contain [Mn 2 O 2 ] 4+ cores with Mn-Mn separations of 2.7 Å. These molecules can be protonated to form [Mn(IV)(X-SALPN)(μ 2 -O,OH)] 2 + in which a bridging oxide is protonated. The pK a values for the series of [Mn(IV)(X-SALPN)(μ 2 -O,OH)] 2 + track linearly versus the shift in redox potential with a slope of 84 mV/pKa. This observation suggests that the [Mn 2 O 2 ] 4+ core can be considered as a unit in which the free energy of protonation is directly related to the ability to reduce the Mn(IV) ion. The marked sensitivity of the reduction potential to the presence of protons presents a mechanism in which an enzyme can control the oxidizing capacity of an oxo manganese cluster by the degree and timing of oxo bridge protonation. | en_US |
dc.format.extent | 566026 bytes | |
dc.format.extent | 3115 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Kluwer Academic Publishers; Springer Science+Business Media | en_US |
dc.subject.other | Plant Physiology | en_US |
dc.subject.other | Life Sciences | en_US |
dc.subject.other | Mn Cluster | en_US |
dc.subject.other | Oxidation | en_US |
dc.subject.other | Oxygen Evolving Complex | en_US |
dc.subject.other | Potential | en_US |
dc.subject.other | Protons | en_US |
dc.title | The effect of protonation on [Mn(IV)(μ 2 -O)] 2 complexes | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Molecular, Cellular and Developmental Biology | en_US |
dc.subject.hlbtoplevel | Health Sciences | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Chemistry, The University of Michigan, 48109-1055, Ann Arbor, MI, USA | en_US |
dc.contributor.affiliationum | Department of Chemistry, The University of Michigan, 48109-1055, Ann Arbor, MI, USA | en_US |
dc.contributor.affiliationum | Department of Chemistry, The University of Michigan, 48109-1055, Ann Arbor, MI, USA | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.identifier.pmid | 24317983 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/43535/1/11120_2004_Article_BF00046754.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1007/BF00046754 | en_US |
dc.identifier.source | Photosynthesis Research | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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