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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.17 [2010] >
IJCT Vol.17(4) [July 2010] >
| Title: | Liquid membrane extraction and transport of amino acids using calix[6]arene |
| Authors: | Raizada, Pankaj
Vyas, Vaishali
Sharma, Uma |
| Keywords: | Amino acids
Calix[6]arene
Liquid membrane extraction
Egg shell membrane support |
| Issue Date: | Jul-2010 |
| Publisher: | CSIR |
| Abstract: | Carrier-assisted transport through liquid membrane is one of the important
application of supramolecular chemistry. Calix[6]arene was utilized as an
extractant as well as carrier for amino acids through liquid membrane. The
receptor forms complex with amino acids by CH-п interactions, van der Waals
interactions and hydrogen bonding. The host compound exhibited high fluxes for
amino acids with high extraction efficiency i.e. valine and alanine due to its
cyclic structure and cavity size. The sequence of extraction and transport
efficiency observed was valine > alanine > glycine > threonine and valine
> glycine > alanine > threonine respectively. In SLM experiments using
cellulose nitrate, PTFE, Onion membrane and egg shell membrane support it was
observed that receptor A1 transports glycine, valine and alanine. The trend of amino acid transported using PTFE
and onion membrane support was glycine
> alanine > valine > threonine and glycine > valine > alanine
> threonine respectively. Among the membrane supports used, the egg shell
membrane was found better support for transport of amino acids because of its
hydrophobic nature and exhibits electrostatic interactions between positively
charged –H4N+ group of amino acid and –COOH group of egg
shell membrane. These results suggest that hydrophobicity of the guest molecule
plays a key role in the extraction while the structure of receptor and pH
governs transport efficiency of the amino acids. |
| Page(s): | 267-273 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.17(4) [July 2010]
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