Monoporphyrinate neodymium (III) complexes stabilized by tripodal ligand: synthesis, characterization and luminescence |
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Authors: | Hongshan He Wai-Kwok Wong Wai-Yeung Wong |
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Institution: | a Department of Applied Chemistry, Huaqiao University, Quanzhou 362011, PR China b Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, PR China c Department of Physics, Hong Kong Baptist University, Kowloon Tong, Hong Kong, PR China |
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Abstract: | A series of monoporphyrinate neodymium (III) complexes stabilized by anionic tripodal ligand (cyclopentadienyl)tris(dimethylphosphito)cobaltate(I) were prepared and characterized by IR, ESI-HRMS, UV-Vis and X-ray diffraction studies. Structural analyses revealed that the Nd3+ ion was seven-coordinate, surrounded by four nitrogen atoms from the porphyrinate dianion and three oxygen atoms from the anionic tripodal ligand. Photoluminescence studies showed that the porphyrinate dianion acting as a sensitizer absorbed the light and transferred the energy to the Nd3+ center, which then allowed the metal ion to emit efficiently at 885 and 1071 nm. The luminescent intensity of the complexes increases when there are strong electronic donating groups on the porphyrin rings but decreases with increasing polarity of the solvents. |
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Keywords: | Lanthanides Tripodal ligands Luminescence Porphyrins |
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