One‐, Two‐ and Three‐Dimensional 3d‐4f Heterometal Complexes Constructed from Pyridine‐2,3‐dicarboxylic Acid

Abstract

The reaction of pyridine-2,3-dicarboxylic acid (2,3-pydcH 2 ) with CuI and Ln 2 O 3 under hydrothermal conditions generated a series of new one-, two-, and three-dimensional coordination polymers, namely, {[Cu 3 Ln 2 (2,3-pydc) 6 (H 2 O) 12 ]· 12H 2 O} n [Ln = La(1), Nd (2)], {[Cu 3 Ln 2 (2,3-pydc) 6 (H 2 O) 8 ]· 6H 2 O} n [Ln = Sm(3), Gd(4)], and {[Cu 3 Ln 2 (2,3-pydc) 6 (H 2 O) 10 ]· 10H 2 O} n [Ln = Tb(5), Ho(6), Er (7), Yb(8), Lu (9)]. The results show that compounds 1 and 2 (type I structure) are 1-D Cu-4f rhombic lattice chains that are formed through assembly of two building block units Cu 3 (pydc) 6 and Ln(H 2 O) 6 . Compounds 3-4 (type II structure) are 2-D layers that are constructed from building block units [Cu(pydc) 2 (H 2 O) 2 ] μ 2 -[a] School

Challenges in the Search for Magnetic Coupling in 3d/4f Materials: Syntheses, Structures, and Magnetic Properties of the Lanthanide Copper Heterobimetallic Compounds, RE2Cu(TeO3)2(SO4)2

“…Hughes et al’s study suggests that change of atomic unit cell volume, due to the lanthanide contraction, plays a distinct role in determining magnetic properties . Few systematic investigations of 3d/4f heterobimetallic materials for the whole series of lanthanides have been documented …”

A Manganese Coordination Polymer and a Palladium Molecular Compound of 3-Pyridinepropionic acid (HL): [MnL2(H2O)2]∞and trans-[Pd(HL)2Cl2]

“…[14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] Recently, several asymmetric linking ligands, in terms of different terminal groups such as carboxylate and pyridyl or imidazole, were utilized to create intriguing coordination polymers, especially those containing both dand f-block metals within their frameworks. [32][33][34][35][36][37][38][39][40] Consistent with the HSAB (hard-soft acid-base) concept, the relatively softer N-terminal is coordinated to the d-block metal, and the relatively harder O-terminal is bound to the f-block metal in such polymers. Since 2010, our group has prepared a couple of pyridyl-carboxylate-type asymmetric linking ligands (L1-L6 in Chart 1) and their coordination polymers.…”

Structural Isomers of a Potential Linking Ligand Containing a Pyridyl and a Carboxylate Terminals: (n-py)-CH=N-C6H4-CH2-COOH} (n = 3, 4)

“…[13][14][15][16][17][18][19][20][21] We also recently prepared several pyridyl-carboxylate-type linking ligands (L1-L6 in Chart 1) and their coordination polymers. [22][23][24][25][26][27][28][29][30][31] Ligands L1 and L2 contain an amide (-C(O)-NH-) fragment, whereas ligands L3-L6 possess an imine (-C=N-) fragment.…”