By varying the solvents and temperatures under solvothermal conditions, two new magnesium based coordination networks were synthesized using 2,5-thiophenedicarbxoylate as a linker. Mg 3 (TDC) 3 (DMF) 3 [1; TDC=2,5 thiophenedicarboxylate; space group P2 1 /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 TDC 2− linkers to form a 3-D network. Coordinated DMF molecules are present within the channels. Mg(TDC)(H 2 O) 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 TDC 2− 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 397nm compared to the free TDC ligand, suggesting a charge transfer between the ligand and the magnesium metal center.