Tuning the valence of 3,3-di(1H-tetrazol-5-yl)pentanedioic acid: Solvothermal synthesis of Eu(III) and bimetallic Eu(III)/Cu(II) compounds

3,3-Di(1H-tetrazol-5-yl)pentanedioic acid (H4dtzpda) show different valence when reacted with Eu3 + or bimetallic Eu3 +/Cu2 +. The two compounds with 1D chain intraligand emission and characteristic peaks of Eu3 +.158