Abstract
The conductivity (κ), turbidity (τ), NMR, and Krafft temperature (T K) studies have been carried out for hexadecylpyridinium bromide (HPyBr), hexadecylpyridinium chloride (HPyCl), and hexadecyltrimethylammonium bromide (HTAB) in the presence of 3G, 3.5G, 4G, and 4.5G generations of poly(amido amine) dendrimers (PAMAM) in aqueous phase. The cmc of all present surfactants were evaluated from κ and τ measurements, both in the presence as well as in the absence of PAMAM. The cmc values decrease in the presence of PAMAM in comparison to that in pure water, especially in the presence of amine terminated PAMAM. Krafft temperature values of pure surfactants also decrease in the presence of various generations of PAMAM. A comparison of all present results from different techniques indicates that HPyBr interacts more strongly with all generations of PAMAM rather than HPyCl and HTAB.
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