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Experimental and First-Principles NMR Analysis of Pt(II) Complexes With O,O'-Dialkyldithiophosphate Ligands
NMR Research Unit, University of Oulu .
Department of Physics, The University of Warwick.
Department of Physics, The University of Warwick.
NMR Research Unit, University of Oulu .
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Antal upphovsmän: 72016 (Engelska)Ingår i: Journal of Physical Chemistry A, ISSN 1089-5639, E-ISSN 1520-5215, Vol. 120, nr 42, s. 8326-8338Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Polycrystalline bis(dialkyldithiophosphato)Pt(II) complexes of the form [Pt{S2P(OR)2}2] (R = ethyl, iso-propyl, iso-butyl, sec-butyl or cyclo-hexyl group) were studied using solid-state 31P and 195Pt NMR spectroscopy, to determine the influence of R to the structure of the central chromophore. The measured anisotropic chemical shift (CS) parameters for 31P and 195Pt afford more detailed chemical and structural information, as compared to isotropic CS and J couplings alone. Advanced theoretical modeling at the hybrid DFT level, including both crystal lattice and the important relativistic spin-orbit effects qualitatively reproduced the measured CS tensors, supported the experimental analysis, and provided extensive orientational information. A particular correction model for the non-negligible lattice effects was adopted, allowing one to avoid a severe deterioration of the 195Pt anisotropic parameters due to the high requirements posed on the pseudopotential quality in such calculations. Though negligible differences were found between the 195Pt CS tensors with different substituents R, the 31P CS parameters differed significantly between the complexes, implying the potential to distinguish between them. The presented approach enables good resolution and a detailed analysis of heavy-element compounds by solid-state NMR, thus widening the understanding of such systems.

Ort, förlag, år, upplaga, sidor
2016. Vol. 120, nr 42, s. 8326-8338
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URN: urn:nbn:se:ltu:diva-60034DOI: 10.1021/acs.jpca.6b09586ISI: 000386641400013PubMedID: 27687143Scopus ID: 2-s2.0-84994000755OAI: oai:DiVA.org:ltu-60034DiVA, id: diva2:1040937
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Validerad; 2016; Nivå 2; 2016-11-17 (andbra)

Tillgänglig från: 2016-10-31 Skapad: 2016-10-31 Senast uppdaterad: 2018-07-10Bibliografiskt granskad

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