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A new xantphos-type ligand and its gold(I) complexes: Synthesis, structure, luminescence

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Tartalom: http://www.sciencedirect.com/science/article/pii/S0277538...
Archívum: MTA Könyvtár
Gyűjtemény: Status = Published



Type = Article
Cím:
A new xantphos-type ligand and its gold(I) complexes: Synthesis, structure, luminescence
Létrehozó:
Besenyei, Gábor
Bitter, István
Párkányi, László
Szalontai, Gábor
Baranyai, Péter
Kunsági-Máté, Éva
Faigl, Ferenc
Grün, Alajos
Kubinyi, Miklós
Kiadó:
Elsevier
Dátum:
2013-05-17
Téma:
QD02 Physical chemistry / fizikai kémia
QD03 Inorganic chemistry / szervetlen kémia
QD05 Crystallography / kristálytan
Tartalmi leírás:
A novel xantphos analog diphosphine ligand, 9,9-dimethyl-4,5-bis(diphenylphosphinomethyl)-9H-xanthene (X(CP)2), with methylene groups inserted between the xanthene skeleton and the two diphenylphosphine units, has been synthesized. A two-coordinate and a three-coordinate gold(I) complex of the ligand, [Au2Cl2(X(CP)2)] and [AuCl(X(CP)2)], have been prepared and studied by X-ray diffraction, NMR and optical spectroscopy. In the solid state, [AuCl(X(CP)2)] adopts a highly ordered structure with a planar xanthene skeleton that faces another plane composed of two phenyl rings and the AuCl moiety. The structure of [Au2Cl2(X(CP)2)] is much less regular, the two P?Au?Cl vectors point to the opposite sides of the folded xanthene backbone. The exchange-broadened resonances in the NMR spectra of [AuCl(X(CP)2))] indicate that this complex exists as a mixture of various chemical species and/or conformers in solution. In contrast, the NMR spectra of [Au2Cl2(X(CP)2)] exclude any medium-range exchange processes. Aurophilic interactions are absent in both X(CP)2 complexes. X(CP)2, as well as its two gold complexes, is phosphorescent in the solid state; the complexes emit at higher wavelengths and with longer lifetimes than the free ligand.
Típus:
Article
PeerReviewed
Formátum:
text
Azonosító:
Besenyei, Gábor and Bitter, István and Párkányi, László and Szalontai, Gábor and Baranyai, Péter and Kunsági-Máté, Éva and Faigl, Ferenc and Grün, Alajos and Kubinyi, Miklós (2013) A new xantphos-type ligand and its gold(I) complexes: Synthesis, structure, luminescence. Polyhedron, 55. pp. 57-66. ISSN 0277-5387
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