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- W3100417171 abstract "Using density functional theory calculations, we have investigated the interactions between hydrogen molecules and metalloporphyrins. A metal atom, such as Ca or Ti, is introduced for incorporation in the central N(4) cavity. Within local density approximation (generalized gradient approximation), we find that the average binding energy of H(2) to the Ca atom is about 0.25 (0.1) eV/H(2) up to four H(2) molecules, whereas that to the Ti atom is about 0.6 (0.3) eV per H(2) up to two H(2) molecules. Our analysis of orbital hybridization between the inserted metal atom and molecular hydrogen shows that H(2) binds weakly to Ca-porphyrin through a weak electric polarization in dihydrogen, but is strongly hybridized with Ti-porphyrin through the Kubas interaction. The presence of d orbitals in Ti may explain the difference in the interaction types." @default.
- W3100417171 created "2020-11-23" @default.
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- W3100417171 date "2011-06-15" @default.
- W3100417171 modified "2023-10-11" @default.
- W3100417171 title "Origins of dihydrogen binding to metal-inserted porphyrins: Electric polarization and Kubas interaction" @default.
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- W3100417171 doi "https://doi.org/10.1063/1.3583813" @default.
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