Patent ID: 7390349

Claim:
A separation method, comprising: chromatographing a mixture of compounds on a fused silica capillary column deactivated with a compound the formula (I): where R 1 is a divalent spacer group selected from —Ar—, (C 1 -C 4 )alkyl substituted —Ar—, —(CH 2 ) k —Ar—(CH 2 ) k —, (C 1 -C 4 )alkyl substituted —(CH 2 ) k —Ar—(CH 2 ) k —, —Ar—Ar—, (C 1 -C 4 )alkyl substituted —Ar—Ar—, —(CH 2 ) k —Ar—Ar—(CH 2 ) k —, (C 1 -C 4 )alkyl substituted —(CH 2 ) k —Ar—Ar—(CH 2 ) k —, —(CH 2 ) k —Ar—(CH 2 ) k —Ar—(CH 2 ) k —, (C 1 -C 4 )alkyl substituted —(CH 2 ) k —Ar—(CH 2 ) k —Ar—(CH 2 ) k —, —Ar—O—Ar—, (C 1 -C 4 )alkyl substituted —Ar—O—Ar—, —(CH 2 ) k —Ar—O—Ar—(CH 2 ) k —, (C 1 -C 4 )alkyl substituted —(CH 2 ) k —Ar—O—Ar—(CH 2 ) k —, saturated or unsaturated —(C 1 -C 6 )alkylene-, (C 1 -C 4 )alkyl substituted saturated or unsaturated —(C 1 -C 6 )alkylene-; Het, (C 1 -C 4 )alkyl substituted -Het-, —(CH 2 ) k -Het-(CH 2 ) k —, (C 1 -C 4 )alkyl substituted —(CH 2 ) k -Het-(CH 2 ) k —, Ar′—CH═, or (C 1 -C 4 )alkyl substituted Ar′—CH═, R 2 is an end cap group; R 3 are each independently a branched or unbranched (C 1 -C 4 )alkyl or -Ph; k is an integer from 1 to about 10; n is an integer from 1 to about 10; and m is an integer from 1 to about 10; and coated with a stationary phase.