C–H⋯Cl relevant discrepancy on structure, magnetic and electronic conductivity of two mixed-valence CuICuII coordination polymers

Crystal structures, fluorescent and magnetic properties of five new coordination polymers based on biphenyl-3,4′,5-tricarboxylic acid

“…For compound 4, the w M T value at 300 K is 0.97 cm 3 K mol À 1 , which is slightly larger than the spin-only value (0.75 cm 3 K mol À 1 ) expected for two coupled Cu(II) ions [13]. As the temperature is lowered, the w M T value increases gradually to a maximum of 1.15 cm 3 K mol À 1 at 21 K, typical of the presence of ferromagnetic interaction.…”

Unusual mixed-valence CuII/CuI coordination polymer based on 2,5-bis(pyridine-2-yl)-1,3,4-thiadiazole and thiocyanate: Synthesis, structural characterization and antimicrobial in vitro activity assessment

“…This type of mixed-valence complex is more interesting than those of Fe or Co because the copper (I) and copper (II) metal centers prefer different geometries and the two oxidation states are very labile and stereo chemically flexible [39,40]. On the other hand, the chemistry of mixed-valence Cu II /Cu I coordination complexes are gaining popularity due to its great applications in various fields like as biological activity [41,42], electronic properties [43,44] and electrical conductivity [45,46]. Although, a first attempt in this context, only a monometallic complex of formula [CuL2(SCN)2] was isolated [30], we present here the synthesis and characterization of the first mixed-valence coordination polymer, [Cu I 3Cu II L2(SCN)5]n, based on L as ligand and thiocyanate as coligand, after a small modification of the preparation method.…”