Theoretical insights into the effect of ligands on platinum(ii) complexes with a bidentate bis(o-carborane) ligand structure

Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology
Ancong ZhaoWei Shen

Abstract

Carboranes feature a wealth of unique structures and properties in phosphorescent transition-metal complexes (PTMCs). Herein, we identify the influence between the electronic structure in carboranes and the main ligand based on the density functional theory (DFT) and time-dependent density functional theory (TD-DFT), which affects the phosphorescence properties of carborane-containing Pt compounds. Furthermore, the mechanism, including singlet-triplet splitting energies ΔE(Sn - T1), transition dipole moment for S0 - Sn transitions, the zero-field splitting (ZFS), the radiative decay rate constant (kr), the Huang-Rhys factor (S), and the spin-orbit coupling (SOC) matrix elements <T1|HSOC|Sn> have been carefully investigated. The results presented here reveal the functional action 1,1'-bis(o-carborane) contributes to the emission process owing to the manipulation of main ligand dtb-bpy and complex 1a shows promising prospects for achieving highly efficient phosphorescence via engineering the conjugation of the main ligand dtb-bpy.

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Citations

Oct 28, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Luca BabettoMaurizio Casarin

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Methods Mentioned

BETA
phosphorescence

Software Mentioned

VMD
Gaussian
ADF2014
MOMAP

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