Luminescent Platinum( II ) Terpyridyl‐Capped Carbon‐Rich Molecular Rods—An Extension from Molecular‐ to Nanometer‐Scale Dimensions

A change in shift! In contrast to the red shift commonly found in organic polyynes and other metal–alkynyl systems, a blue shift in the transition energy was observed in electronic absorption and emission studies on a novel series of structurally characterized dinuclear platinum(II)–terpyridyl complexes [{Pt(tBu3-tpy)}2(CC)n](X)2 (1–3; tBu3-tpy=4,4′,4′′-tri-tert-butyl-2,2′:6′,2′′-terpyridine) upon increasing the extent of π conjugation of the alkynyl bridge.