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A New, Dinuclear High Spin Manganese(III) Complex with Bridging Phenoxy and Methoxy Groups. Structure and Magnetic Properties
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för organisk kemi.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för organisk kemi.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för organisk kemi.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för material- och miljökemi (MMK), Avdelningen för oorganisk kemi och strukturkemi.
Vise andre og tillknytning
2006 (engelsk)Inngår i: Inorganic Chemistry Communications, ISSN 1387-7003, E-ISSN 1879-0259, Vol. 9, nr 12, s. 1195-1198Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A new μ-phenoxy-μ-metoxy di-manganese(III) complex with the trisphenolic ligand, 2,6-bis[((2-hydroxybenzyl)(2-pyridylmethyl)amino)methyl]-4-methylphenol, was isolated as a perchlorate salt. The X-ray structure shows that the two manganese(III) ions are in a distorted octrahedral enviroment with approximately perpendicular Jahn–Teller axes. Investigation of the molar magnetic susceptibility reveals a ferromagnetic coupling between the two high-spin manganese(III) ions. Fitting of the data led to g = 2 and J = 12.5 cm−1

sted, utgiver, år, opplag, sider
2006. Vol. 9, nr 12, s. 1195-1198
Emneord [en]
Manganese complex, X-ray structure, Magnetic properties
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-23607DOI: 10.1016/j.inoche.2006.07.025OAI: oai:DiVA.org:su-23607DiVA, id: diva2:193359
Tilgjengelig fra: 2005-02-24 Laget: 2005-02-24 Sist oppdatert: 2017-12-13bibliografisk kontrollert
Inngår i avhandling
1. Dinuclear Manganese Complexes for Artificial Photosynthesis: Synthesis and Properties
Åpne denne publikasjonen i ny fane eller vindu >>Dinuclear Manganese Complexes for Artificial Photosynthesis: Synthesis and Properties
2005 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This thesis deals with the synthesis and characterisation of a series of dinuclear manganese complexes. Their ability to donate electrons to photo-generated ruthenium(III) has been investigated in flash photolysis experiments followed by EPR-spectroscopy. These experiment shows several consecutive one-electron transfer steps from the manganese moiety to ruthenium(III), that mimics the electron transfer from the oxygen evolving centre in photosystem II.

The redox properties of these complexes have been investigated with electro chemical methods and the structure of the complexes has been investigated with different X-ray techniques. Structural aspects and the effect of water on the redox properties have been shown.

One of the manganese complexes has been covalently linked in a triad donor-photosensitizer-acceptor (D–P–A) system. The kinetics of this triad has been investigated in detail after photo excitation with both optical and EPR spectroscopy. The formed charge separated state (D–P–A+) showed an unusual long lifetime for triad based on ruthenium photosensitizers.

The thesis also includes a study of manganese-salen epoxidation reactions that we believe can give an insight in the oxygen transfer mechanism in the water oxidising complex in photosystem II.

sted, utgiver, år, opplag, sider
Stockholm: Institutionen för organisk kemi, 2005. s. 49
Emneord
Crystal Structure, Artificial photosynthesis, Manganese complex
HSV kategori
Identifikatorer
urn:nbn:se:su:diva-396 (URN)91-7155-018-6 (ISBN)
Disputas
2005-03-18, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 12 A, Stockholm, 10:00
Opponent
Veileder
Tilgjengelig fra: 2005-02-24 Laget: 2005-02-24bibliografisk kontrollert

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