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Synthesis, characterization, and luminescence properties of magnesium coordination networks using a thiophene-based linker |
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| Authors: | Paul J Calderone Alexander C Santulli John B Parise |
| Institution: | a Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, United States b Department of Geosciences, Earth and Space Science Building, Stony Brook University, Stony Brook, NY 11794-2100, United States c Condensed Matter Physics and Materials Science Department, Building 480, Brookhaven National Laboratory, Upton, NY 11973, United States d Photon Source Division, Brookhaven National Laboratory, Upton, NY 11973, United States |
| Abstract: | By varying the solvents and temperatures under solvothermal conditions, two new magnesium based coordination networks were synthesized using 2,5-thiophenedicarbxoylate as a linker. Mg3(TDC)3(DMF)3 1; TDC = 2,5 thiophenedicarboxylate; space group P21/c, a = 17.747(4) Å, b = 9.805(2) Å, c = 21.359(4) Å, β = 103.13(3)°] is constructed by a combination of magnesium polyhedral trimers, which are connected by the TDC2− linkers to form a 3-D network. Coordinated DMF molecules are present within the channels. Mg(TDC)(H2O)2 2; space group Pnma, a = 7.296(4) Å, b = 17.760(4) Å, c = 6.6631(3) Å] is formed by 1-D chains of magnesium octahedra connected by the TDC2− linker. Water molecules are coordinated at the axial positions of the magnesium octahedra. Compound 1 is formed using DMF as the synthesis solvent at 180 °C, while compound 2 is formed using ethanol as the synthesis solvent at 100 °C. Both compounds show enhanced photoluminescence intensity when excited at 397 nm compared to the free TDC ligand, suggesting a charge transfer between the ligand and the magnesium metal center. |
| Keywords: | Coordination networks Magnesium metal center Photoluminescence |
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