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Electrochemical Impedance Spectroscopy as a Tool for Electrochemical Rate Constant Estimation
Published on: October 10, 2018
Photophysics and electrochemistry of a platinum-acetylide disubstituted perylenediimide
Ben A Llewellyn1, Anna G Slater, Gudrun Goretzki
1School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK. Neil.Champness@nottingham.ac.uk Mike.George@nottingham.ac.uk.
Abstract:
The synthesis and photophysical study of a perylene diimide (PDI) functionalised with platinum acetylide units of the type, trans{-C≡C-Pt(PBu3)2-C≡C-Ph} and comparison with a phenylacetylide substituted model compound are reported. The model compound demonstrates typical perylene absorption and photoluminescence spectra characteristic of singlet excited state formation and decay. The Pt-substitution, however, appears to induce spin-orbit coupling into the chromophore and giving rise to a triplet excited state which was confirmed by transient absorption measurements. This excited state is quenched by oxygen, leading to the formation of singlet oxygen in dichloromethane, recorded by time-resolved near-infrared luminescence measurements.
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