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Flower-like morphology of naphthalene diimides containing tetra-L- and D-alanine

Show simple item record Shaikh, D.B. More, K.S. Kobaisi, M.A. La, D.D. Bhosale, Sidhanath V. Bhosale, S.V. 2020-12-04T04:44:22Z 2020-12-04T04:44:22Z 2020
dc.identifier.citation ChemistrySelect. 5(44); 2020; 14203-14209. en_US
dc.description.abstract Two structural isomers of naphthalene diimide (NDI) chromophores NDI-3 and NDI-4, which are NDI imide position functionalised with four L-/D-alanine subunits. Density functional theory calculations revel that HOMO molecular orbital is localized on N-phenyl substituent and LUMO on NDI core. Further, the UV-vis, fluorescence measurements show that both the derivatives i.e. NDI-3 and NDI-4 exhibit changes in optical and photophysical properties with the addition of non-polar i.e. methylcyclohexane in chloroform as well as water in tetrahydrofuran. From these results, it is clear that the structural isomers NDI-3 and NDI-4 shows a significant solvatochromic effect, which ascribed to the aggregation effect via Pi-Pi stacking of NDI core along with hydrogen-bonding between alanine side chains. Scanning electron microscopy (SEM) and polarized optical microscopy images clearly demonstrate formation of flower like morphology in THF:H sub(2)O and fiber nanostructure in CHCl sub(3):MCH for both NDI-3 and NDI-4. Interestingly, only NDI-4 in CHCl sub(3):MCH (4:6, v/v) solvent mixture produces rose-like flower microstructures. en_US
dc.publisher Wiley en_US
dc.subject Chemistry en_US
dc.title Flower-like morphology of naphthalene diimides containing tetra-L- and D-alanine en_US
dc.type Journal article en_US
dc.identifier.impf y

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