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Complexations of Ln(III) with SnS4H and Sn2S6: Solvothermal syntheses and characterizations of lanthanide coordination polymers with thiostannate and polyamine mixed ligands
- Source :
- Journal of Solid State Chemistry. 230:118-125
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- Polymeric lanthanide complexes with thiostannate and polyamine mixed ligands, [Ln(peha)(μ–SnS4H)]n [Ln=La (1a), Nd (1b)] and [{Ln(tepa)(μ–OH)}2(μ–Sn2S6)]nnH2O [Ln=Nd (2a), Sm (2b), Gd (2c), Dy (2d)] (peha=pentaethylenehexamine, tepa=tetraethylenepentamine) were respectively prepared in peha and tepa coordinative solvents by the solvothermal methods. In 1a and 1b, the Ln3+ ions are coordinated by a hexadentate peha ligand forming [Ln(peha)]3+ units. The [SnS4H]3− anion chelates a [Ln(peha)]3+ unit via two S atoms and coordinates to another [Ln(peha)]3+ unit via the third S atom. As a result, the [Ln(peha)]3+ units are connected into coordination polymers [Ln(peha)(μ–SnS4H)]n by an unprecedented tridentate μ–η1,η2–SnS4H bridging ligands. In 2a–2d, the Ln3+ ions are coordinated by a pentadentate tepa ligand, and two [Ln(tepa)]3+ units are joined by two μ–OH bridges to form a binuclear [{Ln(tepa)(μ–OH)}2]4+ unit. Behaving as a bidentate μ–η1, η1–Sn2S6 bridging ligand, the Sn2S6 unit connects [{Ln(tepa)(μ–OH)}2]4+ units into a neutral coordination polymer [{Ln(tepa)(μ–OH)}2(μ–Sn2S6)]n via the trans S atoms. The Ln3+ ions are in distorted monocapped square antiprismatic and bicapped trigonal prismatic environments in [{Ln(peha)(μ–SnS4H)]n and [{Ln(tepa)(μ–OH)}2(μ–Sn2S6)]n, respectively. The denticities of ethylene polyamine play an important role on the formation and complexation of the thiostannate in the presence of lanthanide ions. Compounds 1a–2d show well-defined absorption edges with band gaps between 2.81 and 3.15 eV.
- Subjects :
- Lanthanide
Denticity
Ligand
Coordination polymer
Stereochemistry
Coordination number
Solvothermal synthesis
Bridging ligand
Condensed Matter Physics
Trigonal prismatic molecular geometry
Electronic, Optical and Magnetic Materials
Inorganic Chemistry
chemistry.chemical_compound
Crystallography
chemistry
Materials Chemistry
Ceramics and Composites
Physical and Theoretical Chemistry
Subjects
Details
- ISSN :
- 00224596
- Volume :
- 230
- Database :
- OpenAIRE
- Journal :
- Journal of Solid State Chemistry
- Accession number :
- edsair.doi...........5b3a84df1b251c35bcd26b087f60e6e0