| abstract |
A compound of general formula (I): (I) wherein: R is selected from the group consisting of (C1-C25) alkyl, (C2-C25) alkenyl, aryl, (C7-C10) aralkyl; n and m are each independently an integer of two to eight; p is one or two; A is selected from the group consisting of -B-, -B- (CH2) rB-, -B- (CH2) rB- (CH2) zB-, wherein r and z are an integer from 2 to 8, B is - NR1 or -N (R2) 2+ 1 / pQ-p group wherein R 1 is selected from hydrogen, (C 1 -C 4) alkyl, (C 1 -C 4) acyl, tert-butoxycarbonyl, and R 2 is selected from hydrogen and ( C1-C4) alkyl; Qp is an anion selected from chloride, bromide, iodide, nitrate, sulfate, hydrogen sulfate, perchlorate, R3COO- wherein R3 has the same meaning as R, independently and R4-O-SO3- wherein R4 is (C2-C14) alkyl with the condition that when Q p is selected from chloride, bromide, iodide, nitrate, sulfate, hydrogen sulfate, perchlorate, R is not (C1-C4) alkyl. |