Document Detail

Independent Pathway Formation of Guest:Host in Host Ternary Complexes Made of Ammonium Salt, Calixarene and Cyclodextrin.
MedLine Citation:
PMID:  23134424     Owner:  NLM     Status:  Publisher    
The interaction between gamma-cyclodextrin and amphiphilic p-sulfonatocalix[4]-arenes was studied using NMR and isothermal titration calorimetry techniques. The results indicate that this calixarenes are able to form 1:1, 1:2 and 2:1 host-guest complexes with the cyclodextrin. The ROESY spectra suggest that the cyclodextrin binds the calixarenes trough the hydrophobic alkyl chains. p-Sulfonatocalix[4]arenes, which are traditionally used as host molecules, act as guests in the presence of gamma-cyclodextrin. However, their recognition site remains active upon complexation with the cyclodextrin, and ternary complexes can be devised. Here, we also demonstrate the formation of such complexes using tetramethylammonium chloride as a model guest. Moreover, it is also demonstrated that the recognition properties of the calixarene are unaffected upon complexation with the cyclodextrin.
Nuno Basilio; Vitor Francisco; Luis Garcia-Rio
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-8
Journal Detail:
Title:  The Journal of organic chemistry     Volume:  -     ISSN:  1520-6904     ISO Abbreviation:  J. Org. Chem.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985193R     Medline TA:  J Org Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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