Patent ID: 7906096

Claim:
A method for preparing a chiral inorganic-organic composite porous material, said composite porous material consisting of an inorganic porous material containing charge-balancing cations, and a cationic chiral amino acid present in the inorganic porous material, the method comprising (a) providing the inorganic porous material containing charge-balancing cations; (b) subjecting the inorganic porous material containing charge-balancing cations to ion exchange using transition metal cations; and (c) subjecting the transition metal cations introduced into the inorganic porous material in (b) to ion-exchange using a chiral amino acid to produce the chiral inorganic-organic composite porous material wherein the chiral amino acid which is converted into cationic through the ion exchange in (c) is present in non-chiral cavities and tunnels of the porous material, and wherein the amino acid is selected from the group consisting of L-amino acids and D-amino acids, and wherein the resulting chiral inorganic-organic composite porous material does not contain a transition metal cation.