Patent ID: 6989044

Claim:
A process for selectively adsorbing a component of a gas mixture, which comprises contacting the mixture with a solid state, selective adsorbent material comprising a porous framework of a plurality of transition element complexes (TECs) having the formula shown below; wherein: (a) M is a primary transition metal ion; (b) D to D 4 are primary donors and m is zero or one, at least three of D to D 4 occupying primary donor coordination sites on M but leaving at least one open coordination site on M for the component to react with M; (c) G to G 4 are functional groups and n is zero or one, at least one of G to G 4 being intramolecularly bonded to at least three adjacent primary donors to form at least one 5 or 6 member chelate ring on the primary transition metal ion and providing at least three donors thereto; (d) M, D to D 4 and G to G 4 together define one or more transition metal complexes, wherein said complexes are the same or different and wherein k is from 0 to 4; (e) R is an intermolecular connecting group selected from (i) secondary metal ions coordinated with secondary donors bonded to one or more of groups G to G 4 on the respective TECs; (ii) multifunctional organic groups forming covalent bonds with one or more of groups G to G 4 on the respective TECs; or (iii) non-coordinating counter-ions spaced between and separating the respective TECs; wherein z is from 1 to 8, and wherein R may be the same or different when z is greater than 1; and (f) y is an integer sufficient to provide said porous framework of the plurality of TECs for the selective adsorption of the desired component thereon.