title: The coordination of the tetraselenidoantimonate [SbSe4]3- anion with trivalent lanthanide ions tuned by ethylene polyamines.
abstract: The solvothermal synthetic system Ln/Sb/Se (Ln = La, Eu) was investigated in different ethylene polyamines, and a series of lanthanum and europium selenidoantimonates [La(en)(2)(dien)(eta(2)-SbSe(4))] (Ia), [La(dien)(2)(mu-eta(1),eta(2)-SbSe(4))] (Ib), [La(trien)(2)(H(2)O)]SbSe(4) (Ic), [La(en)(trien)(mu-eta(1),eta(2)-SbSe(4))] (Id), [Eu(en)(2)(dien)(SbSe(4))] (IIa), [Eu(en)(trien)(eta(2)-SbSe(4))] (IIb), and [Eu(dien)(2)(eta(2)-SbSe(4))] (IIc) (en = ethylenediamine, dien = diethylenetriamine, trien = triethylenetetramine) were prepared. A systematic investigation of the crystal structures showed that the soft Lewis basic ligand [SbSe(4)](3-) can be tuned to coordinate to the hard Lewis acidic lanthanide ions as a monodentate ligand, mono-SbSe(4); a bidentate chelating ligand, eta(2)-SbSe(4); or a tridentate bridging ligand, mu-eta(1),eta(2)-SbSe(4), by the ethylene polyamines or mixed ethylene polyamines used in the syntheses. The [SbSe(4)](3-) anion exhibited different coordination modes for La(3+) and Eu(3+) ions in the presence of the same ethylene polyamine because of the different coordination numbers of La(3+) and Eu(3+) ions.
authors: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China. jiadingxian@suda.edu.cn
authors: Dingxian
authors: D
authors: Jia
authors: Qinyan
authors: Q
authors: Jin
authors: Jiangfang
authors: J
authors: Chen
authors: Yingli
authors: Y
authors: Pan
authors: Yong
authors: Y
authors: Zhang
mesh_terms: D000965:Antimony / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005030:Ethylenes / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D011073:Polyamines / Q000737:chemistry*; D012643:Selenium / Q000737:chemistry*
chemical_list: D005030:Ethylenes; D007477:Ions; D028581:Lanthanoid Series Elements; D009942:Organometallic Compounds; D011073:Polyamines; D000965:Antimony; D012643:Selenium