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4. The Electron Donor Site:Metal ions are a natural choice as an electron donor for artificial systems. As in PSII, Mn could play the role of the penultimate donor (Fig. 2, B). The ligands bound to Mn could also be substituted with intermediate donors, a strategy that has had some success.20 In addition, by incorporating multiply-bonded metal dimers of the M2L4 paddle-wheel type, we may introduce multi-electron redox properties to the final structures.21 Indeed, tetracarboxylate metal dimers are among the best characterized and studied molecules with multiply bonded metals and exhibit a wide variety of electrochemical, magnetic, and photochemical properties. The complexes are quite robust, remain intact through a variety of reaction conditions, and are synthetically accessible. Please contact me for more information concerning the use of metallosupramolecular chemistry for the synthesis of electron donor sites in polymetallic complexes. |
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| Last Updated: December 20, 2004 |
