Two-component Type of Organogelators

The combination of 78+79 could gel Az-propanol, chloroform, benzene, ethyl acetate and acetone. The important feature of the two-component type of gelator is the fact that heating is unnecessary for the preparation of the gel, if it dissolves at 

TEM image of ethyl acetate gel formed by a 1 1 mixture of 78 and 5-(2-ethyl-hexyl)barbituric acid is shown in Fig. 2.24. It exhibits the gathering of numerous fibrous twisted aggregates. Constricted ribbons will be formed by twisting of the molecular tape, built up through complementary intermolecular hydrogen bonding. 

The motif of complementary intermolecular hydrogen bonding is shown in Fig. 2.25. The molecular arrays based on complementary intermolecular hydrogen bonding is formed, but the branched alkyl chains of the two components are randomly folded and bent, in contrast to the extended alkyl chains of cocrystals. Besides 76+77 and 78+79, some other two-component gelators have been report- 

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