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• W2045101986 abstract "Abstract We report a facile, high‐yield synthesis and characterization of discrete, ternary porphyrin–metal–polyoxometalate (por–M–POM) complexes where a group IV transition‐metal ion is bound both to the porphyrin core and to the lacunary site of a Keggin POM, PW 11 O 39 –7 . The remarkably robust complexes exploit the fact that Hf IV and Zr IV are 7–8 coordinate and reside outside the plane of the porphyrin macrocycle, thus enabling the simultaneous coordination to meso ‐tetraphenylporphyrin (tpp) or meso ‐tetra(4‐pyridyl)porphyrin (tpyp) and to the defect site in the Keggin framework. The physical properties of the (tpp)Hf(PW 11 O 39 )[tba] 5 , (tpyp)Hf(PW 11 O 39 )[tba] 5 , and (tpp)Zr(PW 11 O 39 )[tba] 5 complexes are similar because the metal ions have similar oxidation states and coordination chemistry. This architecture couples the photonic properties of the porphyrin to the POM because the metal ion is incorporated into both frameworks. Thus, the ternary complexes can serve as a basis for the characterization of Hf IV and Zr IV porphyrins bound to oxide surfaces through the group IV metal ions. The Hf(por) and Zr(por) bind strongly to TiO 2 nanoparticles and indium tin oxide (ITO) surfaces, but significantly less binds to crystalline SiO 2 or TiO 2 surfaces. Together, the strong binding of the metalloporphyrins to the POM, nanoparticles, and the ITO surfaces, and paucity of binding to crystalline surfaces, suggests that the three‐to‐four open coordination sites on the Hf(por) and Zr(por) are predominantly bound at surface defect sites. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)" @default.
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• W2045101986 date "2009-05-28" @default.
• W2045101986 modified "2023-10-11" @default.
• W2045101986 title "Ternary Porphyrinato Hf^IV and Zr^IV Polyoxometalate Complexes" @default.
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• W2045101986 doi "https://doi.org/10.1002/ejic.200900284" @default.
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