Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 362, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.molliq.2022.119763
Keywords
Low molecular organic gelators (LMOGs); Urea -based compounds; Small -angle neutron scattering (SANS); Gelation Mechanism; Anion sensing
Funding
- Ministry of Social Justice and Empowerment, Government of India, New Delhi [UGC-NFOBC-NFO-2018-19-OBC-GUJ-71717]
- DST -FIST, New Delhi
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A series of thiazole-urea-aliphatic chain-based compounds were designed and synthesized using Crystal Engineering principles. These compounds showed excellent gelation ability in polar solvents. Physicochemical techniques were employed to investigate the packing of these compounds in solid-state, solution, and gel phases, revealing high sensitivity and selectivity of compound 1 to iodide ions.
A simple series of thiazole-urea-aliphatic chain-based compounds (1-7) were designed and synthesized using the principle of Crystal Engineering. The aliphatic alkyl chain of compounds was varied to obtain the delicate hydrophobic-hydrophilic balance between solute-solvent molecules required to attain the supramolecular gelation. Interestingly, all the compounds turned out to be excellent gelators for polar solvents including water mixtures with alcohols and acetonitrile. To get an insight into the packing of molecules in solid-state, solution, and gel phases various physicochemical techniques were employed such as SANS, SEM, PXRD, DFT calculation, etc. UV-Vis spectrometric measurements of compound 1 in the solution phase were carried out to establish the anion sensing capability. Very high sensitivity and selectivity of iodide ion in presence of other ions and degelation of acetonitrile gel of compound 1 in pres-ence of iodide salts, make these compounds a unique class of LMOGs. (c) 2022 Elsevier B.V. All rights reserved.
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