The intriguing effect of thiolates as co-ligands in platinum(II) complexes bearing a cyclometalated 1,3-di(2-pyridyl)benzene
Articolo
Data di Pubblicazione:
2022
Citazione:
The intriguing effect of thiolates as co-ligands in platinum(II) complexes bearing a cyclometalated 1,3-di(2-pyridyl)benzene / F. Fagnani, A. Colombo, C. Dragonetti, D. Roberto, D. Marinotto. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - 532:(2022 Mar 01), pp. 120744.1-120744.6. [10.1016/j.ica.2021.120744]
Abstract:
Substitution of the chlorido ligand of the fascinating cyclometalated complex [Pt(5-mesityl-1,3-di(2-pyridyl)benzene)Cl] by thioacetate leads to the related thiolato complex [Pt(5-mesityl-1,3-di(2-pyridyl)benzene)(thioacetate)], which has been fully characterised. Its photophysical properties were determined in degassed dichloromethane solution, as blend in Poly(MethylMethAcrylate) (PMMA) thin films, and as powders, at room temperature. Both in solution and in thin films, an increase of the concentration of the complex leads to a red shift of the phosphorescence spectra and to a decrease of lifetime decays and quantum yield. It appears that tuning of emission spectra depends on the competition between monomeric and aggregate emissive states. No clear evidence of excimer formation has been detected. In powders, an aggregate emission spectrum is red-shifted at 602 nm, reaching a very low phosphorescence quantum yield of 1 %.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Phosphorescence; Platinum(II) complexes; Thiolate;
Elenco autori:
F. Fagnani, A. Colombo, C. Dragonetti, D. Roberto, D. Marinotto
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