期刊
CHEMISTRY OF MATERIALS
卷 18, 期 5, 页码 1206-1212出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm051677u
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The synthesis and characterization of a new family of ionic liquid crystal dendrimers consisting of the ammonium salts of the commercially available poly(propylene imine) (G = 1-5) dendrimers and 4-decyloxy-, 3,4-didecyloxy-, and 3,4,5-tridecyloxybenzoic acids are reported. The liquid crystalline behavior was investigated by means of differential scanning calorimetry, polarizing-light optical microscopy, and X-ray diffractometry. Dendrimers with mono- and didecyloxybenzoate moieties show lamellar mesomorphism, namely, smectic A, whereas those with tridecyloxybenzoate units show columnar mesomorphism: rectangular for G = 1 and hexagonal for G = 2-5. On the basis of the experimental results, we propose models both at the molecular level and in the mesophase for all the materials.
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