Organogelators of Amino Acid Derivatives

The appearance of formed gels is transparent, translucent, or opaque, depending on the kind of gelator and solvent. Although it depends on the combination of 

In particular, 68 (Z-L-Ile-NHCigHs ) was easily prepared from L-isoleucine in moderate yield by the two-step reaction described below. 

Results of gelation test of 68 and 69 toward 26 solvents are summarized in Table 2.11, where solvents up to cyclohexane are arranged in dielectric constant 

The reason why the amino acid derivatives with simple structures like 68 and 

The thermodynamic parameters for sol-to-gel transition in cyclohexane were found by calculation to be A// = -8.73 kcal/mol (20 °C), AS = -15.9 cal/K mol. These parameters indicate that the enthalpic contribution compensates for the undesirable entropic change. In other words, the enthalpic contribution is substan- 

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