Strongly luminescent 5d/4f heterometal–organic macrocycles with open metal sites: post-assembly modification and sensing

Abstract

A series of strongly luminescent 5d/4f heterometal–organic macrocycles formulated as Ln₂(Pt–L)₂ have been constructed from a preformed cis-blocked alkynylplatinum metalloligand (Pt–L) and lanthanide (Ln = La^III, Eu^III, Lu^III) ions. Open metal sites on the lanthanide centres of the heterometal–organic macrocycles facilitate not only the post-assembly modification leading to great enhancement of the luminescence, but also the displacement sensing toward toxic thiophosphonates.