Novel unexpected Tb3+ coordination polymer containing two carboxylate ligands: Syntheses, structure and photoluminescent properties

Novel unexpected coordination polymer [Tb(PHTHGLY)(CBGLY)(H2O)2](H2O)3 complex containing simultaneously N-phthaloylglycinate and N-(2-carboxybenzoyl)glycinate ligands has been prepared and characterized by single crystal X-ray structure, thermogravimetric analysis and infrared spectroscopy. The X-ray crystal diffraction indicates that the Tb3+-complex crystallizes in a triclinic crystal system and space group P1¯, forming a 1D polymer where carboxylate groups bridge the Tb3+ ions. The photoluminescence data revel that the ligands act as efficient “antennas” sensitizing the luminescence of the Tb3+ ion showing a strong green emission color arising from intraconfigurational 5D4 → 7FJ transitions (J = 0–6).

Graphical abstractNovel unexpected coordination polymer [Tb(PHTHGLY)(CBGLY)(H2O)2](H2O)3 complex containing simultaneously N-phthaloylglycinate and N-(2-carboxybenzoyl)glycinate ligands has been prepared. The X-ray crystal diffraction indicates that the Tb3+-complex crystallizes in a triclinic crystal system and space group P1¯, forming a 1D polymer where carboxylate groups bridge the Tb3+ ions. Photoluminescence data revel that the ligands act as efficient “antennas” sensitizing the luminescence of the Tb3+ ion.Figure optionsDownload full-size imageDownload as PowerPoint slide