Spectroscopic Study of Oxygen Sorption and Diffusion in a Membrane Containing a Cobalt Porphyrin Complex

Abstract

ABSTRACT:The kinetics and equilibrium of molecular oxygen sorption in the membrane contammg [cx,cx',cx'',cx'''-meso-tetrakis(o-pivalamidophenyl)porphinato]cobalt(II)-1-

Preparation of facilitated transport hollow fiber membrane for gas separation using cobalt tetraphenylporphyrin complex as a coating material

“…Nishide et al and other authors have reported that the cobaltprophyrin (CoP) membrane is effective for oxygen facilitated transport. The carrier of the metal complex is effective for specific gas species transport and the membranes show high permeability (Shinohara et al, 2005;Shentu and Nishide, 2003;Nishide et al, 1986) and permselectivity (Nishide et al, 1987;Shoji et al, 2008;Chikushi et al, 2014). Cobalt tetraphenylporphyrin (CoTPP) consists on one side of a porphyrin plane ; the other side reacts with imidazole ligand to improve the oxygen binding affinity.…”

Dual-mode oxygen-sensing based on oxygen-adduct formation at cobaltporphyrin–polymer and luminescence quenching of pyrene: an optical oxygen sensor for a practical atmospheric pressure

“…CoP is also characterized by a deep red color, and the oxygen-adduct formation is accompanied by a sharp deoxy-oxy spectral change with isosbestic points. 35 H.N. has reported that a polymer layer composed of CoP ligated with polyvinylimidazole or polyvinylpyridine serves as a colorimetric oxygen sensor due to its visible absorption spectral change.…”

Membranes of the Picket Fence Cobalt Porphyrin Complexed with Poly(vinylimidazole and -pyridine)s: Selective Optical Response to Oxygen

“…The CoP membranes are also characterized by a deep red color, and the oxygen-adduct formation is accompanied by a sharp deoxy-oxy spectral change with isosbestic points. 9 Pretsch et al and the authors have reported 10 in a collaboration that the membranes composed of the CoP-poly(octyl methacrylate-co-1-vinylimidazole) complexes serve as a new type of oxygen-sensitive components for optical sensors. In this paper, the authors have succeeded in preparing CoP membranes composed of three different polymer-ligands (Chart 1) by taking into account the ligating equilibrium constants: The useful oxygen-response range was significantly extended, and the operational lifetime was extremely prolonged for the prepared CoP membranes.…”

“…The CoP acts as a fixed carrier of oxygen and facilitates the transport of oxygen in the membrane to display oxygen permselectivity. The CoP membranes are also characterized by a deep red color, and the oxygen-adduct formation is accompanied by a sharp deoxy−oxy spectral change with isosbestic points in a collaboration that the membranes composed of the CoP−poly(octyl methacrylate- co -1-vinylimidazole) complexes serve as a new type of oxygen-sensitive components for optical sensors.…”