Kim, HS Kim, YJ Kim, JJ Lee, SD Kang, YS Chin, CS 2024-01-21T12:31:44Z 2024-01-21T12:31:44Z 2021-09-05 2001-05 0897-4756 https://pubs.kist.re.kr/handle/201004/140504 Polymer-metal complexes composed of Cu(1,3-butadiene)OTf and cellulose acetate (CA), Cu-CA, have been successfully applied to facilitated olefin transport membranes for the olefin/paraffin separation, and the reversible solid-state interactions of Cu+ ions with cellulose acetate (CA) and olefins have been observed using FT-IR and UV spectroscopy. FT-IR study clearly shows that the Cu+ ions in the Cu-CA membrane are coordinated by the carbonyl groups of CA. Upon incorporation of Cut 1,3-butadiene)OTf into CA, the carbonyl stretching frequency of CA at 1753 cm(-1) shifts to a lower frequency at around 1702 cm(-1) and the degree of coordination increases with increasing amounts of Cu(l,3-butadiene)OTf. The Cu+-carbonyl interaction is found to be significantly affected by the coordination of an olefin, suggesting that the olefin and carbonyl group compete with each other for the coordination to Cu+ ions. Reversible olefin coordination to Cu+ ions in the Cu-CA membranes has been observed by FT-IR and UV studies. Treatment of the Cu-CA membrane with propylene, ethylene, or 1,3-butadiene produces a corresponding olefin-coordinated membrane in which the coordinated olefin is easily replaced by another olefin. English AMER CHEMICAL SOC COMPLEX MEMBRANES SILVER SALTS SEPARATION PROPYLENE KINETICS DRY Spectroscopic characterization of cellulose acetate polymer membranes containing Cu(1,3-butadiene) OTf as a facilitated olefin transport carrier Article 10.1021/cm000807q 1 CHEMISTRY OF MATERIALS, v.13, no.5, pp.1720 - 1725 CHEMISTRY OF MATERIALS 13 5 1720 1725 scie scopus 000168861200043 2-s2.0-0034847909 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article COMPLEX MEMBRANES SILVER SALTS SEPARATION PROPYLENE KINETICS DRY Cu(1 3-butadiene)OTf