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Inorganics 2014, 2(4), 565-590;

Attachment of Luminescent Neutral “Pt(pq)(C≡CtBu)” Units to Di and Tri N-Donor Connecting Ligands: Solution Behavior and Photophysical Properties

Departamento de Química-Centro de Síntesis Química de La Rioja, (CISQ), Universidad de La Rioja, 26006, Logroño, Spain
School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
Authors to whom correspondence should be addressed.
Received: 16 September 2014 / Revised: 9 October 2014 / Accepted: 9 October 2014 / Published: 31 October 2014
(This article belongs to the Special Issue Organoplatinum Complexes)
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Binuclear derivatives [{Pt(pq)(C≡CtBu)}2(μ-L)] (1a5a), containing a series of dinitrogen linker ligands and the trinuclear [{Pt(pq)(C≡CtBu)}3(μ-L)] (6a) [L = μ-1,3,5-tris(pyridine-4-ylethynyl)benzene], formed by bridge-splitting reactions with [Pt(pq)(μ-κCα2-C≡CtBu)]2 (Pt-1), are reported. The complexes are characterized by a combination of 1H NMR spectroscopy, mass spectrometry and X-ray crystallography (2a and 4a). 1H NMR proves the existence of a dynamic equilibrium in solution between the diplatinum complexes (species a), the corresponding mononuclear complex with terminal N-donor ligands (species b), the starting material (Pt-1) and the free ligand (L). The effects of concentration, temperature and solvent properties on the equilibrium have been studied. The optical properties of these systems have been investigated by UV-visible absorption and emission spectroscopies in solid state and in solution, and the nature of the transitions and the excited state analyzed by theoretical calculations on 2a. View Full-Text
Keywords: alkynyl; cyclometalated; luminescence; platinum; N-donor ligands alkynyl; cyclometalated; luminescence; platinum; N-donor ligands

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Lalinde, E.; Moreno, M.T.; Ruiz, S.; Sánchez, S. Attachment of Luminescent Neutral “Pt(pq)(C≡CtBu)” Units to Di and Tri N-Donor Connecting Ligands: Solution Behavior and Photophysical Properties. Inorganics 2014, 2, 565-590.

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