Find in Library

Multifunctional materials with a coexistence of proton conduction properties, single–molecule magnet (SMM) behaviors and magneto–optical Faraday effects have rarely been reported. Herein, a new pair of Cu(II)–Dy(III) enantiomers, [DyCu₂(<i>RR/SS</i>–H₂L)₂(H₂O)₄(NO₃)₂]·(NO₃)·(H₂O) (<b><i>R</i></b>–<b>1</b> and <b><i>S</i></b>–<b>1</b>) (H₄L = [<i>RR</i>/<i>SS</i>] –N,N′–bis [3–hydroxysalicylidene] –1,2–cyclohexanediamine), has been designed and prepared using homochiral Schiff–base ligands. <b><i>R</i></b>–<b>1</b> and <b><i>S</i></b>–<b>1</b> contain linear Cu(II)–Dy(III)–Cu(II) trinuclear units and possess 1D stacking channels within their supramolecular networks. <b><i>R</i></b>–<b>1</b> and <b><i>S</i></b>–<b>1</b> display chiral optical activity and strong magneto–optical Faraday effects. Moreover, <b><i>R</i></b>–<b>1</b> shows a zero–field SMM behavior. In addition, <b><i>R</i></b>–<b>1</b> demonstrates humidity– and temperature–dependent proton conductivity with optimal values of 1.34 × 10⁻⁴ S·cm⁻¹ under 50 °C and 98% relative humidity (RH), which is related to a 1D extended H–bonded chain constructed by water molecules, nitrate and phenol groups of the <i>RR</i>–H₂L ligand.