Highly selective oxygen permeation through a poly(vinylidene dichloride) cobalt porphyrin membrane: Hopping transport of oxygen via the fixed cobalt porphyrin carrier

被引：59

作者：

Nishide, H ^{[1
]}

Tsukahara, Y ^{[1
]}

Tsuchida, E ^{[1
]}

机构：

[1] Waseda Univ, Dept Polymer Chem, Tokyo 1698555, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1998年 / 102卷 / 44期

关键词：

D O I：

10.1021/jp9816317

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A combination membrane having both gas barrier properties and selective oxygen-absorbing and -carrying capability was prepared by complexing poly(vinylidene dichloride-co-vinylimidazole) and meso-tetrakis(alpha,alpha,alpha,alpha-o-pivalamidophenyl)porphyrin (CoP). The vinylidene dichloride copolymer was selected because of its low physical gas permeability and its dense and tough thin-membrane formability even after the CoP complexation. Oxygen permeation was selectively facilitated with the CoP carrier fixed in the membrane, and high oxygen permselectivity (facilitation factor > 25, oxygen/nitrogen permselectivity > 100, permeability 10(-10) cm(3) (STP) cm cm(-2) s(-1) cmHg(-1)) was observed, e.g., for the membrane containing > 20 wt % CoP at an upstream oxygen partial pressure of 0.5 cmHg. The facilitated oxygen transport was properly analyzed by a dual-mode model to give permeation parameters of the membrane such as the postulated diffusion coefficient of oxygen hopping via the fixed CoP carrier (D-C). D-C was inversely proportional to the average distance between the CoP carrier sites.

引用

页码：8766 / 8770

页数：5

共 19 条

[1]

CHEN XS, 1997, J PHYS CHEM B, V101, pS572

[2] PICKET-FENCE PORPHYRINS - SYNTHETIC MODELS FOR OXYGEN BINDING HEMOPROTEINS [J].