pH Dependent Synthesis of Nd^III Coordination Compounds Based on Bifunctional 5‐(4‐Pyridyl)tetrazole‐2‐acetic Acid

Abstract

The Nd III coordination compounds [Nd(4-pytza) 3 (H 2 O) 2 ]· 2H 2 O (1) and [Nd(4-pytza) 2 (H 2 O) 4 ]Cl·2H 2 O (2) [H4-pytza = 5-(4-pyridyl)tetrazole-2-acetic acid] were synthesized by reactions of K4-pytza and NdCl 3 ·6H 2 O at different pH values. Single crystal X-ray diffraction analysis reveals that 4-pytza ligands in 1 in a μ 1,3 -COO syn-syn or μ 1,1,3 -COO bridging mode coordinate to two central Nd III atoms to

Syntheses, Structures, and Photophysical Properties of Two Coordination Polymers Based on 2,3‐Dioxo‐1,2,3,4‐tetrahydroquinoxaline‐6‐carboxylic Acid

“…To date, many efforts have been devoted to design and synthesis versatile functional ligands, which are capable of coordinating to a metal ion while providing the π‐conjugated system and hydrogen‐bonding accepter/donor for organizing their complexes into supramolecular frameworks through intermolecular interactions . In recent years, the coordination chemistry of the tautomeric ligand 1,4‐dihydro‐2,3‐quinoxalinedione has been investigated .…”