Study of inclusion complex formation between a homologous series of n-alkyltrimethylammonium bromides and β-cyclodextrin, using conductometric technique

✍ Scribed by Amir Abbas Rafati; Ahmad Bagheri; Hussein Iloukhani; Mortaza Zarinehzad

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 233 KB
• Volume: 116
• Category: Article
• ISSN: 0167-7322
• DOI: 10.1016/j.molliq.2004.05.003

✦ Synopsis

The behaviour of the inclusion complex based on a homologous series of n-alkyltrimethylammonium bromides and h-cyclodextrin (h-CD) were studied using conductometric technique. Association constants have been determined for S(CD) and S(CD) 2 complexes. It has been found that DETAB and DOTAB form only the 1:1 complexes, while TTAB forms 1:1 1:2 TTAB/CD complexes. The results are explained in terms of the difference in chain length of surfactants and dimensions of the h-CD cavity. The experiments were carried out at different temperatures. The association constant values are used for evaluation of thermodynamic parameters of complexation, such as DG8, DH8 and DS8.