Abstract: Compositions include stationary phases that include at least one bonded phase, where the bonded phase includes a silicon atom directly attached to (1) at least one bulky group, and (2) a long chain with an embedded polar group where in certain embodiments the embedded polar group is carbonate, carbamate, urea, ether, or amide. In certain embodiments, the bulky group is an alkyl or an aryl such as isopropyl or isobutyl. The compositions may be contacted with a mobile phase under conditions sufficient to separate the at least two constituents. Also provided are systems and kits for use with the subject methods.