Manganese phthalocyanine structure

Janczak J, Kubiak R, Sledz M, Borrmann H, Grin Y (2003) Synthesis, structural investigations and magnetic properties of dipyridinated manganese phthalocyanine, MnPc(py)2. Polyhedron 22 2689-2697... 

Recently, three TPO models have been reported bis (salicylidene)ethylenediaminato cobalt(II) [Co(salen)] in MeOH (14), cobalt(II)tetraphenylporphyrin (CoTPP) (25) in DMF, and manganese phthalocyanine (Mn-Pc) in DMF (16). These models have been reported as having the TPO-mimic function of oxygenating skatole, a tryptophan analogue, to form 2-formamidoacetophenone (FA). However, one of the most critical problems for these models is the lack of structural similarity between the TPO active site (heme) and these models. The structure of these models is not similar to the heme in TPO with respect to the central metal and/or the ligand. Furthermore, Fe(salen) does not possess the TPO-mimic function (14). 

In addition there has been a recent review of manganese porphyrin chemistry (19) as well as of the aqueous and chloro complexes of the porphyrin species (20). These discussions are complemented by a discussion of the electrochemistry of manganese porphyrin compounds (21). Related studies include the phthalocyanine complexes (22), the manganese (III)-hemoglobin structure (23), and the characterization of macrocyclic complexes of manganese (24, 25). Other relevant chemistry involves the Schiff-base complexes of Mn(III) (26, 27, 28). 

The phthalocyanine complexes of manganese have been studied for many years ° The most recent work has established the formation of an rf dioxygen complex on oxygenation of [Mn(Pc)] in N,N-dimethylacetamide solution and a similar result has been obtained for a tetra-sulphonated phthalocyanine derivative The porphyrin complex Mn(TPP)02 was assigned an rf structure on the basis of E.P.R. data and this assignment has recently been supported by infra-red data using 02 Schiff base complexes of Mn(II) were reported to form dinuclear rf complexes on oxygenation in... 

Ou Z, Erben C, Autret M, Will S, Rosen D, Lex J, Vogel E, Kadish KM (2005) Manganese (III) and manganese(IV) corroles synthesis, spectroscopic, electrochemical, and X-ray structural characterization. J Porphyr Phthalocyanines 9 398 1-12... 

F. 25 a Cyclic voltammogram [AcO -Mn Pc ] at GC electrode in deoxygenated DMF solution +0.1 M TBABF4. Dashed line background. Scan rate = 50 mV s . b Structure of manganese tetrakis(5-hexyn-oxy) phthalocyanine [AcO -Mn Pc ] (reproduced with permission from Ref. [58])... 

Fig. 29 a Cyclic voltammograms of 02-iemoved solution of Cl-Mn(III)Pc on Pt in TBAP/DMSO. In situ UV-Vis spectral changes during b the first reduction and c the second reduction processes of Cl-Mn(III)Pc in 02-removed electrol3 te. d Structure of tetra-(4-(4-methoxyphenyl)-8-methylcoumarin-7-yloxy)manganese(III) chloride-phthalocyanine, [Q-Mn (III)Pc] (reproduced with permission from Ref. [63])... 

Fig. 30 a CVs and SWVs of [Cl-Mn(III)Pc] at 0.100 V s scan rate on a GCE working electrode in DCM/TBAP electrolyte, b Structure of tetra peripheral 3,5-bis(trifluoromethyl)phenylethynyl substituted manganese (III) chloride phthalocyanines [Cl-Mn(III)Pc] (reproduced with permission from Ref. [37])... 

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