General design rules for bimetallic platinum(II) complexes

Alexis W. Mills, Andrew J.S. Valentine, Kevin Hoang, Subhangi Roy, Felix N. Castellano, Lin X. Chen, Xiaosong Li*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


A series of platinum(II) bimetallic complexes were studied to investigate the effects of ligands on both the geometric and electronic structure. Modulating the Pt-Pt distance through the bridging ligand architecture was found to dictate the nature of the lowest energy electronic transitions, localized in one-half of the molecule or delocalized across the entire molecule. By reducing the separation between the platinum atoms, the lowest energy electronic transitions will be dominated by the metal-metal-to-ligand charge transfer transition. Conversely, by increasing the distance between the platinum atoms, the lowest electronic transition will be largely localized metal-to-ligand charge transfer or ligand centered in nature. Additionally, the cyclometalating ligands were observed to have a noticeable stabilizing effect on the triplet excited states as the conjugation increased, arising from geometric reorientation and increased electron delocalization of the ligands. Such stabilization of the triplet state energy has been shown to alter the excited state potential energy landscape as well as the excited state trajectory.

Original languageEnglish (US)
Pages (from-to)9438-9449
Number of pages12
JournalJournal of Physical Chemistry A
Issue number43
StatePublished - Nov 4 2021

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry


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