A thiophenopolyamine Cu(II) complex fixed by atmospheric carbon dioxide: synthesis,structure and properties

A new trinuclear complex, {Cu(L)]₃ (μ₃-CO₃)}(ClO₄)₄ (L = N-(2-thiophenoethyl)-N,N-bis (3-aminopropyl)amine), was synthesized and characterized by single-crystal X-ray analysis. The complex contained three identical mononuclear copper(II) units connected by the μ₃-carbonate formed from atmospheric carbon dioxide. The electronic and magnetic properties were studied by cyclic voltammetry and the measurement of magnetic susceptibility, respectively. The μ₃-bridging model revealed weak ferromagnetic coupling of Cu(II), with the J value of ?11.28 cm^?1 and the Zeeman splitting g value of 2.06, which were determined by means of magnetic measurements in the 2–300 K range.