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

Inorganics

Elena Lalinde¹  M. Teresa Moreno¹  Santiago Ruiz¹  Sergio Sánchez² 

[1] Departamento de Química-Centro de Síntesis Química de La Rioja, (CISQ), Universidad de La Rioja, 26006, Logroño, Spain; E-Mail:;School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK; E-Mail:

关键词: alkynyl;    cyclometalated;    luminescence;    platinum;    N-donor ligands;   

DOI  :  10.3390/inorganics2040565

来源: mdpi

【 摘 要 】

Binuclear derivatives [{Pt(pq)(C≡C^tBu)}₂(μ-L)] (1a–5a), containing a series of dinitrogen linker ligands and the trinuclear [{Pt(pq)(C≡C^tBu)}₃(μ-L)] (6a) [L = μ-1,3,5-tris(pyridine-4-ylethynyl)benzene], formed by bridge-splitting reactions with [Pt(pq)(μ-κC^α:η²-C≡C^tBu)]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.

【 授权许可】

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