Four Transition Metal Coordination Polymers based on an Aromatic Multi‐carboxylic Acid as Ligand: Syntheses, Crystal Structures, and Fluorescent/Magnetic Properties

Abstract

Abstract. Four compounds, namely, [Zn(H 2 were synthesized under solvothermal conditions by employing a semi-rigid aromatic multi-carboxylic acid ligand (H 3 L) and ancillary nitrogen ligand (bpy = 4,4Ј-bipyridine). Xray diffraction studies revealed that complexes 1, 3, and 4 show zerodimensional (0D) structures, which were further extended to distinct 3D supramolecular nets by extensive hydrogen-bond interactions. However, in compound 2, 1D chains of square-shaped pores were

Nickel-Ion-Coordinated Reversibly Solvatochromic Polydiacetylene Based on Tubular Assembly of Macrocyclic Diacetylene

“…As shown in Figure , two molecules of MCDA-MA undergo dimerization via complexation with the Ni 2+ ion in a linear lamellar fashion, which further stack into columns by π–π stacking interactions to create a noncovalent self-associated tubular packing pattern. From IR data and following previous reports, − it is proposed that four water molecules are coordinated with the central Ni 2+ ion to fulfill the octahedral geometry. The Ni 2+ ion coordination with the carboxyl group directs the sterically favored geometry for columnar self-assembling MCDA, which is a prerequisite for efficient polymerization.…”

Crystal structure of dodecaaqua-bis(μ2-4,4′-bipyridine-κ2 N:N′)-bis(4,4′-((5-carboxylato-1,3-phenylene)bis(oxy))dibenzoato-κ1 O)tricopper(II) - water (1/4), C62H70Cu3N4O32

“…Both water molecules form H-bonding interactions with two adjacent carboxylate groups (cf. the figure) and one neighboring coordinated water while this was not the case for the Ni(II) and Co(II)-based compounds, indicating the different synthesis might result in different lattice guest agreement [9]. The title complex is further assembled into a 3D supramolecular framework by the hydrogen bond interactions.…”