Chromatographic materials for the separation of unsaturated molecules

A chromatographic stationary phase having the following structure (i):

• [X](W)a(Q)b(T)c (i)
• wherein:
• X is a chromatographic substrate comprising a surface and containing silica, metal oxide, an inorganic-organic hybrid material, a group of block copolymers, or combinations thereof;
• W is selected from the group consisting of hydrogen and hydroxyl, wherein W is bound to the surface of X;
• Q is:
• T is represented by one of the following structures:
• a is zero or a positive number;
• b is a positive number;
• c is a positive number;
• wherein a ratio of b/c is greater than or equal to 0.05 and less than or equal to 100;
• and
• Z is independently selected for each instance from:
• (a) a surface attachment group having the formula (B1)x(R5)y(R6)zSi—, wherein x is an integer from 1-3, y is an integer from 0-2, z is an integer from 0-2, and x+y+Z=3, R5 and R6 are each independently selected from the group consisting of methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, tert-butyl, substituted or unsubstituted aryl, cyclic alkyl, branched alkyl, lower alkyl, a protected or deprotected alcohol, a zwitterion group and a siloxane bond, and B1 is a siloxane bond;
• (b) an attachment to a surface organofunctional hybrid group through a direct carbon-carbon bond or through a heteroatom, ester, ether, thioether, amine, amide, imide, urea, carbonate, carbamate, heterocycle, triazole, or urethane linkage;
• or
• (c) an adsorbed surface group that is not covalently attached to the surface of X.