Synthesis, Structures, and Photoluminescent Properties of Cyclometalated Platinum(II) Complexes bearing Upper-Rim Phosphinated Calix[4]arenes

A series of upper-rim diphosphinated calixarene receptors bearing various R and R' substituents at the lower riin (L-n; n = 1-5) were synthesized, and their reactions with [Pt(Thpy)(HThpy)Cl] afforded the phosphorescent platinum(II)modified calixarene receptors [(PtThpyCl)(2)L-n]. The structure of [[PtThpy(CH3CN)](2)L-1](ClO4)(2) and [(PtThpvCl)(2)L-5] were determined by X-ray crystallographic analysis, and the photophysical properties of [(PtThpyCl)(2)L-n] were investigated.