Syntheses and structures of 1d coordination polymers based on cluster anions [Re4Te4(CN)12]4– and cationic Ln3+ (Ln = La, Gd) complexes with 1,10-phenanthroline

Abstract

Two new porous coordination polymers based on cluster anions [Re4Te4(CN)12]4– and cationic Ln3+ (Ln = La, Gd) complexes with 1,10-phenanthroline (Рhen) are synthesized under hydrothermal conditions. The structures of the compounds are determined by X-ray diffraction analysis (CIF files CCDC 1437445 (I) and 1437446 (II)). Compound (РhenH)[{La(H2O)3(Рhen)2}{Re4Te4(CN)12}] · 1.5Рhen · 6H2O (I) crystallizes in the space group \(P\bar 1\) (triclinic system): a = 13.322(3), b = 15.977(3), c = 18.576(4) A, α = 71.34(3)°, β = 85.56(3)°, γ = 88.27(3)°, V = 3734.8(13) A3. Compound (PhenH)[{Gd(H2O)2(Phen)2}{Re4Te4(CN)12}] · 2Phen · 0.5H2O (II) crystallizes in the space group C2/c (monoclinic crystal system): a = 18.146(1), b = 30.245(2), c = 13.455(2) A, β = 97.858(2)°, V = 7315.4(1) A3. Structures I and II are based on polymer chains consisting of alternating fragments [Re4Te4(CN)12]4– and {Ln(H2O)n(Phen)2}3+ (Ln = La, n = 3; Ln = Gd, n = 2) linked by the bridging CN ligands. The packings of the polymers contain extended channels due to the developed network of noncovalent interactions. The walls of the channels are formed by both hydrophilic (CN–) and hydrophobic (Рhen) groups. The channels, whose volume is 25 and 15% for compounds I and II, respectively, are filled by disordered Phen molecules and PhenH+ cations, as well as by H2O molecules.