Triaryl-Boron Functionalized Dinuclear Platinum Complexes Linked by Photoisomerizable Bpe Ligand: Luminescence and Isomerism

We report herein a series of triarylboron-functionalized Pt­(II) dinuclear complexes using a photoactive bis­(4-pyridyl)­ethylene (bpe) bridging unit. The new Pt­(II) complexes display phosphorescence at both room temperature and 77 K. Depending on the conditions under which crystals of the complexes were grown, either the <i>cis</i>- or <i>trans</i>-isomers could be obtained. The <i>trans</i> and <i>cis</i> isomers were found to undergo light-induced isomerization in solution with the <i>trans</i> isomer being the dominant species.