Spectrophotometric Investigation of Cobalt Chloride Complex Formation in Aqueous Calcium Nitrate–Ammonium Nitrate Melts at T = 328.15 K: Influence of Water Content

Influence of metal-coordinating comonomers on the coordination structure and binding in magnetic poly(ionic liquid)s

“…These three main bands and the general shape of the spectra are in close agreement with the ∼630, ∼665, and ∼690 nm reported for the [CoCl 4 ] 2− . [43][44][45][46] This UV-vis data confirms the presence of the paramagnetic [CoCl 4 ] 2− anion in the MPIL films for all equivalents examined. However, other tetrahedral coordination structures (e.g.,…”

“…Similar absorbances in the 600–700 nm range have been previously assigned to tetrahedral coordination of CoCl 2 with other ligands such as nitrate and diethyl sulfoxide. 46–48 The similarity of the UV-vis spectra in the 500–800 nm range for all [Pam- co -PDADMA][Co 2+ ] and [Pam- co -PDADMA][mixed Fe 3+ /Co 2+ ] copolymers indicates that the cobalt complex structure forms similarly for all mole equivalences.…”