Influence of Metal Cations and Coordination Modes on Luminescent Group 1 and 2 Metal Sulfonate Complexes Constructed from 4,4′‐Dihydroxybiphenyl‐3,3′‐disulfonic Acid

Abstract

Molecular refrigerators consisting of unusual fourth‐row metal‐ion–lanthanide complexes with bridging fluoride ions are presented by M. Evangelisti and J. Bendix in their Communication on The combination of lightweight auxiliary ligands and tunable interactions by choice of metal ion makes these systems interesting modules for low‐temperature cooling applications.

Layered Inorganic–Organic 3,5-Dimethylpyrazole-4-Sulfonate Films for Protection of Copper Surfaces against Corrosion

“…Structural analyses of the metal complexes, which consist of alternating inorganic/organic layers, revealed that pyrazole-4-sulfonate is an extremely versatile ligand, due to the coordination flexibility of the sulfonate group and the ability of the pyrazole moiety to participate in H-bonding, aromatic interactions, and coordination with metals. Aryl sulfonate ligands have been found to be useful for the construction of various layered solids and metal–organic frameworks − and continue to receive attention due to various applications such as CO 2 capture and conversion, , luminescent materials, , and dyes. − …”

“…43 consist of alternating inorganic/organic layers, revealed that pyrazole-4-sulfonate is an extremely versatile ligand, due to the coordination flexibility of the sulfonate group and the ability of the pyrazole moiety to participate in H-bonding, aromatic interactions, and coordination with metals. Aryl sulfonate ligands have been found to be useful for the construction of various layered solids and metal−organic frameworks 44−47 and continue to receive attention due to various applications such as CO 2 capture and conversion, 48,49 luminescent materials, 50,51 and dyes. 52−56 Herein we report results of studies using the 3,5-dimethyl derivative of pyrazole-4-sulfonic acid, including single-crystal X-ray crystallography and thermogravimetry of various coordination polymers and metal complexes, corrosion studies of copper surfaces, and studies of the protective films by scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM/EDS).…”