Patent ID: 8476461

Claim:
A compound of formula (I): wherein: S 1 is a group of formula —C≡C-L′-A in which: L′ is a linkage group which is a single bond, or a divalent hydrocarbon group chosen from the group consisting of straight or branched alkylenes optionally comprising one or more oxygen, nitrogen or sulphur atoms in their chain; straight or branched alkenylenes; straight or branched alkynylenes, and arylenes; or a divalent hydrocarbon chain composed of a chain of at least two divalent hydrocarbon groups of the aforementioned type; A is a polar functional group chosen from among sulphonate, sulphate, phosphate, ammonium, carboxylate, phosphonate, alkylammonium sulphate and polyoxyethylene groups; S 2 is: a —C≡C-L′-A group identical to or different from S 1 , in which L′ and A have the aforementioned meanings; —F; —H; or a hydrocarbon chain, straight or branched, saturated or unsaturated, optionally interrupted by one or more oxygen, nitrogen or sulphur atoms, optionally cyclized in whole or in part, optionally aromatic and optionally functionalized, and each of groups R 1 , R 2 , R 3 , R 4 , R 5 , R 6 or R 7 each independently designates a —H group or a hydrocarbon chain, wherein the hydrocarbon chain is straight or branched, saturated or unsaturated, optionally interrupted by one or more oxygen atoms, optionally cyclized in whole or in part, optionally aromatic and/or optionally functionalized, provided that all or part of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 or R 7 can be linked together to form a bridged form.