INTERCALATION OF ALPHA,OMEGA-ALKYLDIAMINES INTO LAYERED A-TITANIUM PHOSPHATE FROM AQUEOUS-SOLUTIONS

This paper reports a study on the mechanism of intercalation of alpha, omega-alkyldiamines NH2(CH2)(n)NH2 (n = 2-9), into layered alpha-titan ium phosphate, alpha-Ti(HPO4)(2) . H2O. The intercalates synthesis was performed by titrating the host with aqueous solutions of alkyldiamin e at 25%C. Crystalline phases showing a general formula alpha-Ti(HPO4) (2) . xNH(2)(CH2)(n)NH2 . H2O (x less than or equal to 1) have been ob tained. In every case, a monolayered arrangement of alpha,omega-alkyld iamine molecules into the host layers is formed. The average inclinati on angle of the alkyldiamine molecules to the phosphate layer and the intercalates packing density have been determined. (C) 1998 Elsevier S cience Ltd.