Abstract
The present work demonstrates the comparative extraction efficiency of p-tert-butylcalix[4]arene (1) and its derivatives (2-4) toward a series of some selected reactive dyes such as Reactive Black-5 (RB-5), Reactive Blue-19 (RB-19) and Reactive Red-45 (RR-45). The study elaborates effectiveness of different anchoring groups present on the periphery of calix[4]arene platform and highlights the importance of preorganization concerning the application of supramolecular chemistry in separation science and technology. It has been observed that compound 4shows good extraction efficiency toward RB-19 among the selected reactive dyes. Enhanced extraction efficiency was observed with the addition of NaCl at pH 7. The proposed extraction mechanism through inclusion complexation was confirmed by log-log plot analysis, which shows 1:1 complexation between 4and RB-19. The solvatochromic response of 4in various solvents of different polarities showed good response in methanol. The log Kof complex was found as 5.2. The complex formation between 4and RB-19 has also been confirmed by FT-IR spectroscopy. The recovery of 4and RB-19 dye was achieved at pH 8 that signifiesthe reusability of 4again and again.
Fakhar N. Memon , Shahabuddin Memon. (2012) Calixarenes: A Versatile Source for the Recovery of Reactive Blue-19 Dye from Industrial Wastewater, Pakistan Journal of Analytical & Environmental Chemistry, Volume 13, Issue 2.
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