A New Series Lanthanide-2,6-Pyridinedicarboxylic Acid Complexes Containing Low Dimensionality: Synthesis, Structure and Photoluminescent Properties

• Published in: Journal of inorganic and organometallic polymers and materials Vol. 21; no. 2; pp. 213 - 222
• Main Authors: Hou, Ke-Ling, Bai, Feng-Ying, Xing, Yong-Heng, Cao, Yun-Zhu, Wei, Dong-Ming, Niu, Shu-Yun
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.06.2011
• Subjects: Chemistry; Chemistry and Materials Science; Dysprosium; Hydrogen bonds; Inorganic Chemistry; Ligands; Organic Chemistry; Organometallic polymers; Photoluminescence; Polymer Sciences; Structural analysis; Synthesis; Three dimensional; 2,6-Pyridine dicarboxylic acid; Coordination modes; Luminescent properties; Crystal structure
• ISSN: 1574-1443; 1574-1451
• DOI: 10.1007/s10904-010-9441-y

Based on the 2,6-pyridinedicarboxylate acid ligand, ten lanthanide complexes with formula , (Hdipa) 3 [Ln(L) 3 ] (Ln = Eu [ 1 ], Gd [ 2 ], Nd [ 3 ], Tb [ 4 ], Ce [ 5 ], Sm [ 6 ], Pr [ 7 ], Dy [ 8 ] and Er [ 9 ]) and [Nd(L)(HL)(H 2 O) 2 ]·4H 2 O ( 10 ), (where H 2 L = 2,6-pyridinedicarboxylic acid and dipa =  N -(1-methylethyl)-2-propanamine) have been prepared by different synthetic methods. Structural analyses reveal that complexes 1 – 3 are isomorphous, zero-dimensional structures, which are further connected to 3D H-bonding networks via extensive intermolecular hydrogen bonds. In the structures of these complexes, the dipa plays a key role in balancing electric charge . For complex 10 , the 1D Ln–O–C–O–Ln polymeric chains are linked into a stable 3D H-bonding framework through numerous intermolecular and intramolecular hydrogen bonds. The luminescent properties of complexes 1 , 4 , 6 and 8 were investigated in detail. Graphical Abstract Based on the 2,6-pyridinedicarboxylate acid ligand, ten lanthanide complexes with formula , (Hdipa) 3 [Ln(L) 3 ] (Ln = Eu [ 1 ], Gd [ 2 ], Nd [ 3 ], Tb [ 4 ], Ce [ 5 ], Sm [ 6 ], Pr [ 7 ], Dy [ 8 ] and Er [ 9 ]) and [Nd(L)(HL)(H 2 O) 2 ]·4H 2 O ( 10 ), (where H 2 L = 2,6-pyridinedicarboxylic acid and dipa =  N -(1-methylethyl)-2-propanamine) have been prepared by different synthetic methods. Complexes 1–9 are zero structures and 10 features a 1D Ln–O–C–O–Ln polymeric chain structure. The luminescent properties of complexes 1 , 4 , 6 and 8 were investigated in detail.