Chakraborty, Anwesha ; Manna, Rabindra Nath ; Paul, Ankan ; Ghosh, Suhrit (2021) Externally Regulated Specific Molecular Recognition Driven Pathway Selectivity in Supramolecular Polymerization Chemistry – A European Journal, 27 (44). pp. 11458-11467. ISSN 0947-6539
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Official URL: http://doi.org/10.1002/chem.202101492
Related URL: http://dx.doi.org/10.1002/chem.202101492
Abstract
This article reveals 4-dimethylaminopyridine (DMAP) regulated pathway selectivity in the supramolecular polymerization of a naphthalene-diimide derivative (NDI-1), appended with a carboxylic acid group. In decane, NDI-1 produces ill-defined aggregate (Agg-1) due to different H-bonding motifs of the −COOH group. With one mole equivalent DMAP, the NDI-1/DMAP complex introduces new nucleation condition and exhibits a cooperative supramolecular polymerization producing J-aggregated fibrillar nanostructure (Agg-2). With 10 % DMAP and fast cooling (10 K/min), similar nucleation and open chain H-bonding with the free monomer in an anti-parallel arrangement produces identical J-aggregate (Agg-2a). With 2.5 % DMAP and slow cooling (1 K/min), a distinct nucleation and supramolecular polymerization pathway emerge leading to the thermodynamically controlled Agg-3 with face-to-face stacking and 2D-morphology. Slow cooling with 5–10 % DMAP produces a mixture of Agg-2a and Agg-3. Computational modelling studies provide valuable insights into the internal order and the pathway complexity.
Item Type: | Article |
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Source: | Copyright of this article belongs to John Wiley & Sons, Inc |
ID Code: | 125991 |
Deposited On: | 17 Oct 2022 11:24 |
Last Modified: | 17 Oct 2022 11:24 |
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