Impressive near-infrared brightness and singlet oxygen generation from strategic lanthanide-porphyrin double-decker complexes in aqueous solution

摘要

Although lanthanide double-decker complexes with hetero-macrocyclic ligands as functional luminescent and magnetic materials have promising properties,their inferior water solubility has negated their biomedical applications.Herein,four water-soluble homoleptic lanthanide(Ln=Gd,Er,Yb and La)sandwiches with diethylene-glycoldisubstituted porphyrins(DD)are reported,with their structures proven by both quantum chemical calculations and scanning tunneling microscopy.Our findings demonstrate that the near-infrared emission intensity and singlet oxygen(1O2)quantum yields of YbDD and GdDD in aqueous media are higher than those of the reported capped lanthanide monoporphyrinato analogues,YbN and GdN;the brightness and luminescence lifetime in water of YbDD are greater than those of YbN.This work provides a new dimension for the future design and development of molecular theranostics-based water-soluble double-decker lanthanide bisporphyrinates.