Dipeptide-based low-molecular-weight efficient organogelators and their application in water purification

Debnath, Sisir ; Shome, Anshupriya ; Dutta, Sounak ; Das, Prasanta Kumar (2008) Dipeptide-based low-molecular-weight efficient organogelators and their application in water purification Chemistry - A European Journal, 14 (23). pp. 6870-6881. ISSN 0947-6539

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/chem.20...

Related URL: http://dx.doi.org/10.1002/chem.200800731

Abstract

The development of new low-molecular-weight gelators for organic solvents is motivated by several potential applications of gels as advanced functional materials. In the present study, we developed simple dipeptide-based organogelators with a minimum gelation concentration (MGC) of 6–0.15 %, w/v in aromatic solvents. The organogelators were synthesized using different L-amino acids with nonpolar aliphatic/aromatic residues and by varying alkyl-chain length (C-12 to C-16). The self-aggregation behavior of these thermoreversible organogels was investigated through several spectroscopic and microscopic techniques. A balanced participation of the hydrogen bonding and van der Waals interactions is crucial for efficient organogelation, which can be largely modulated by the structural modification at the hydrogen-bonding unit as well as by varying the alkyl-chain length in both sides of the hydrophilic residue. Interestingly, these organogelators could selectively gelate aromatic solvents from their mixtures with water. Furthermore, the xerogels prepared from the organogels showed a striking property of adsorbing dyes such as crystal violet, rhodamine 6G from water. This dye-adsorption ability of gelators can be utilized in water purification by removing toxic dyes from wastewater.

Item Type:Article
Source:Copyright of this article belongs to John Wiley & Sons, Inc.
Keywords:Amino Acids; Dyes/Pigments; Organogels; Peptides; Supramolecular Chemistry
ID Code:108613
Deposited On:01 Feb 2018 11:18
Last Modified:01 Feb 2018 11:18

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