The first example of a Pt⋯Pt interaction in platinum(ii) complexes bearing bulky tri-tert-butyl-2,2′:6′,2″-terpyridine pendants via conformational control of the calix[4]arene moiety

Abstract

An unprecedented short Pt⋯Pt contact between sterically bulky Pt(^tBu₃trpy) alkynyl moieties has been observed in the X-ray crystal structure of a dinuclear platinum(II) complex bridged by a diethynylcalix[4]arene derivative; the complex in its crystalline state showed a red shift in the emission maxima at 298 K and 77 K relative to its powder form, which has been attributed to the presence of a metal–metal interaction in the crystal lattice.