[2.2]Paracyclophane-bridged platinum(ii) complexes for silver(i) recognition with emission enhancement

Abstract

A [2.2]paracyclophane-bridged bimetallic alkynylplatinum(II) terpyridyl complex displays severe emission quenching due to the presence of intramolecular π–π interactions. It undergoes an adaptive conformational change upon recognizing Ag⁺, which attenuates the intramolecular stacking strength and thereby exhibits “turn-on” emission character.