Varying the Dimensionality of Cu(II)-Based Coordination Polymers Through Solvent Influence

Abstract

This work reports the synthesis and structure of a large porous zeotype network observed within compound (1) using {Cu2(piv)4} as the linking unit (piv = pivalate). The slow in situ formation of the hmt ligand (hexamethylenetetramine) appears to be key in generating a µ4-bridging mode of the hmt-node. Attempts to improve the low yield of compound (1) using different solvent layer diffusion methods resulted in the µ3-hmt complexes (2) and (3). Both compounds exhibit a 3D network of two intertwined chiral networks. Strong hydrogen bonding present in (3) leads to the formation of intertwined, DNA-like double-helix structures. The use of bulky solvents in the synthesis of compound (4) leads to the structure crystallizing solvent-free. The packing of (4) is dominated by energy minimization, which is achieved when the 1D-“cylinders” pack into the closest possible arrangement. This work highlights the potential for solvent controlled synthesis of extended copper-hmt systems.

Coordination Polymers from 2-Chloroterephthalate Linkers: Synthesis, Structural Diversity, and Catalytic CO2 Fixation

“…The design of functional coordination polymers (CPs) has become a hot research topic, − especially considering the huge diversity of potential applications of such compounds and derived materials in gas storage and separation, − catalysis, − molecular magnetism, , photochemistry, − and selective sensing. − Although the assembly of CPs may depend on many parameters (e.g., types of metal ions, , linkers, , supporting ligands, , solvent, , molar ratios of reagents, − and other conditions , ), the nature of metal ions and organic linkers are undoubtedly the key factors that usually define the structures and functional properties of the obtained compounds. Aromatic carboxylic acids containing several COOH functionalities represent the most populated family of linkers in the research on CPs, especially given their availability and reasonable cost, thermal stability, possibility of further functionalization, and multitude of coordination modes. − …”

Crystal Structure and Thermal Studies of Coordination Compounds

“…The reaction conducted in the dichloromethane resulted in the formation of a compound consisting of distorted chair-shaped ten-membered rings which form a helical network. The presence of polyethyleneglycol leads to the formation of intertwined, DNA-like double-helix structures, while tetrahydrofuran favours the creation of a solvent-free complex with a 1D chain structure [5].…”