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Protection-deprotection method in synthesis of calixarene derivatives
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作者 陆国元 李倩 +1 位作者 刘芳 万小宾 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2000年第2期207-211,共5页
The debenzylation and selective de-tert-butylation of p-tert-calix[4]arene derivatives were studied and 11, 17, 23-tri-tert-butyl-25, 26, 27-tri-O-etherated calix[4] arenes were synthesized by a simultaneous debenzyla... The debenzylation and selective de-tert-butylation of p-tert-calix[4]arene derivatives were studied and 11, 17, 23-tri-tert-butyl-25, 26, 27-tri-O-etherated calix[4] arenes were synthesized by a simultaneous debenzylation and selective de-tert-butylation process. 展开更多
关键词 DEBENZYLATION de-tert-butylation calixarene derivatives
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NOVEL WATER SOLUBLE HOST MOLECULE DERIVED FROM CALIXARENE
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作者 You Heng SHI,Zhi Hui ZHANG Photographic Chemistry, Academia Sinica, Beijing, 100101 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第11期953-956,共4页
Reaction of p-t-butylcalix[6]arene with ethylene oxide gives a water soluble host compound with a hydrophobic cavity and it can include organic molecules and ions in aqueous solution.
关键词 NOVEL WATER SOLUBLE HOST MOLECULE DERIVED FROM calixarene
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Extraction Properties of Calix[4]arenes towards Sulphonated Dyes
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作者 Muhammad Israr Faiza Faheem +6 位作者 Fozia T. Minhas Asma Rauf Saba Rauf M. Raza Shah Fazal Rahim Kiramat Shah M. I. Bhanger 《American Journal of Analytical Chemistry》 2016年第2期219-232,共14页
Extraction of sulphonated dyes through supramolecular interaction with calix[4]arene derivatives is being presented here. The selectivity of calixarene derivatives namely piperidine derivative of calix[4]arene (calix-... Extraction of sulphonated dyes through supramolecular interaction with calix[4]arene derivatives is being presented here. The selectivity of calixarene derivatives namely piperidine derivative of calix[4]arene (calix-1), 1-methyl piperazine derivative of calix[4]arene (calix-2), and di-methyl amine derivative of calix[4]arene (calix-3) were evaluated initially against reactive red 2 (RR-2), acid black (AB), reactive blue 19 (B-19) and synthetic dye (D-2) by liquid-liquid extraction experiment. The results showed that the above three calixarenes possess excellent complexation abilities toward the selected dyes. The stoichiometric ratio for the calixarene derivatives and dyes was estimated through Job’s plot, whereas Hildebrand-Benesi equation was used to calculate formation constant (K<sub>s</sub>) and molar absorptivity (Δε) of complexes. The binding association (K<sub>a</sub>) and dissociation (K<sub>d</sub>) constants were calculated by Scatchard plot additionally to further support the complexation data obtained from Hildebrand-Benesi equation. Conversely association constants from, both Hildebrand-Benesi equation and Scatchard plot i.e. K<sub>s</sub> and K<sub>a</sub> favor strong binding interaction between calix-1: D-2, calix-2: B-19, and calix-3: AB complexes. Thus present study adeptly supports the complexation of calixarene derivatives for sulfonated dyes. 展开更多
关键词 calixarene derivative COMPLEXATION Job’s Plot Hildebrand and Benesi Equation Association Constant
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