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Tuning the aggregation performance by varying the substituent position: comparative study of neutral bis-urea derivatives in aqueous medium

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Abstract

A set of three neutral bis-urea derivatives has been purposefully chosen to investigate the consequences of positional isomers on the aggregation performance. The comparative analysis based on the spectral study proved that all three isomers 1, 2 and 3 exhibit substantial aggregation behavior while compound 2 is more potent in the formation and stabilization of aggregates. Variation in the aromatic core changes the directional property and steric effect, which causes diversity in the morphology of aggregated species of 1, 2 and 3, and this is further validated by FESEM images and a theoretical approach. Additional studies were also conducted to assess the influence of temperature, salt (NaCl), urea and pH on the aggregation properties to gain a deeper understanding of the relative aggregation aptitude and the results indicate the strong hydrogen bonding responsible for the aggregation phenomenon.

Graphical abstract: Tuning the aggregation performance by varying the substituent position: comparative study of neutral bis-urea derivatives in aqueous medium

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Publication details

The article was received on 25 Jun 2019, accepted on 07 Aug 2019 and first published on 07 Aug 2019


Article type: Paper
DOI: 10.1039/C9NJ03297E
New J. Chem., 2019, Advance Article

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    Tuning the aggregation performance by varying the substituent position: comparative study of neutral bis-urea derivatives in aqueous medium

    S. Halder, U. Manna and G. Das, New J. Chem., 2019, Advance Article , DOI: 10.1039/C9NJ03297E

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