Photosensitized luminescence of neodymium(III) coordinated with 8-quinolinolates in DMSO-d6

Some quinolinol derivatives possessing suitable triplet state energy were examined to sensitize the luminescence of neodymium ion (Nd(III)) as coordinating ligands. Photosensitized luminescence in the near-infrared region of four neodymium(III) complexes: tris(8-quinolinolato)neodymium(III) ([Nd(q)(3)]), tris(5,7-dichloro-8-quinolinolato)-neodymium(III) ([Nd(Clq)(3)]), tris(5,7-dibromo-8-quinolinolato)neodymium(III) ([Nd(Brq)(3)]) and tris(5,7-diiodo-8-quinolinolato)neodymium(III) ([Nd(Iq)(3)]), were observed by selective excitation of the ligand moieties in DMSO-d(6). Highly efficient intramolecular energy transfer from the excited ligand moieties to the central Nd(III) ion was successfully achieved by using the halogenated ligands.