Pyrophosphito-bridged diplatinum complex is one of the most studied dinuclear complexes in a paddle-wheel structure. The chemistry of pyrophosphito-bridged diplatinum complex began at the discovery of the Pt(II)-Pt(II) complex, K4[Pt2(pop)4]·2H2O (pop = P2H2O 5 2-) by Roundhill et al. in 1977 . Since [Pt2(pop)4]4- shows intense long-lived phosphorescence, photochemistry and excited-state chemistry of [Pt2(pop)4]4- has been attracted much attention (see following early reviews and references therein [2, 3]). Although no chemical bond exist between two Pt(II) atoms in the ground state, 5dσ → 6pσ transition should induce the bonding character between them. This excited-state structure has been confirmed by several optical methods [4-9]. The excited state of [Pt2(pop)4]4- is powerful one-electron reductant, therefore, it can be used as a photochemical catalyst for converting ethanol to acetaldehyde and hydrogen  and for the transfer hydrogenation of alkenes and alkynes [11, 12]. The Pt(III)-Pt(III) complex, [Pt2(pop)4H2]4-, is the active species of the catalytic reaction .
|Title of host publication||Material Designs and New Physical Properties in MX- and MMX-Chain Compounds|
|Number of pages||24|
|ISBN (Print)||3709113164, 9783709113165|
|Publication status||Published - 2013 Jun 1|
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