Observation of supramolecular π–π dimerization of a dinuclear ruthenium complex by 1H NMR and ESMS

Abstract

The dinuclear ruthenium complex of bis{dipyrido[3,2-f:2′,3′-h]quinoxalo}[2,3-e:2′,3′-l]pyrene (bqpy) forms dimers in solution maintained only by π–π stacking of the bridging ligand, stable enough to be observed not only by ¹H NMR spectroscopy but also by electrospray mass spectrometry at low accelerating cone voltage.