Abstract
Linear chain platinum(II) double salts such as Magnus’ Green Salt [Pt(NH3)4][PtCl4] and mixed valence complexes with bridging halide ions such as Wolffram’s Red Salt [Pt(etN)4,Cl2][Pt(etN)4]Cl4•4H2O were examined as a potentially important new class of low bandgap materials for solar fuel synthesis. Room temperature emission and lifetime measurements on two mixed valence red salts provide evidence for mobile excitonic states at or near the bandgap but rapid photocorrosion in aqueous solution may make them unsuitable as water splitting agents. In the case of the Pt(II) double salts, [Pt(bipy)2][Pt(CN)4] and [Pt(bipy)(4-methyl- 4’-heptyl-2,2’-bipyridine)][Pt(CN)4]2 (EBG = 2 eV) proved to be highly active photosensitizers for H2 production in the presence of EDTA and Pt sol. Without Pt sol, very little H2 is produced, but no evidence for photocorrosion is seen in either system. These results are in marked contrast to Magnus’ Green Salt and several other Pt(II) double salts which are ineffective as photosensitizers. From the investigation of these materials, guidelines have been established that should make it possible to design many Pt(II) double salts which are photoactive.
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Houlding, V.H., Frank, A.J. (1986). Linear Chain Platinum Complexes as Photocatalysts. In: Pelizzetti, E., Serpone, N. (eds) Homogeneous and Heterogeneous Photocatalysis. NATO ASI Series, vol 174. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4642-2_11
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DOI: https://doi.org/10.1007/978-94-009-4642-2_11
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