| abstract |
The invention relates to substituted derivatives of per(3,6-anhydro)cyclodextrins, their preparation process and their use for the separation of ions. n These derivatives comply with one of the formulas: ##STR1## in which the R 1 , which can be the same or different, represent H, a halogen, OH, OR 2 , OM, SH, SR 2 , OCOR 2 , NH 2 , NR 2 R 3 , CONR 2 R 3 , CONH 2 , CN, COOR 2 , COOH, OSO 2 R 2 , N 3 or R 2 , and n=5, 6 or 7, provided that all the R 1 do not represent OH. |