Aggregation-induced emission characteristics and solvent triggered hierarchical self-assembled chiral superstructures of naphthalenediimide amphiphiles

Herein, we report the design and synthesis of two naphthalene diimide amphiphiles NDI-TA1 and NDI-TA2 bearing acylated and deacylated hydroxyl groups of tartaric acid, respectively. Furthermore, we investigated the influence of acylation and deacylation of hydroxyl groups of tartaric acid over UV-vi...

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Bibliographic Details
Published in:New journal of chemistry 2020, Vol.44 (4), p.1615-1623
Main Authors: Shejul, Dipak A, Wagalgave, Sopan M, Jadhav, Ratan W, Kobaisi, Mohammad Al, La, Duong Duc, Jones, Lathe A, Bhosale, Rajesh S, Bhosale, Sidhanath V, Bhosale, Sheshanath V
Format: Article
Language:English
Subjects:
Acylation
Agglomeration
Biomimetics
Chemical synthesis
Chirality
Dichroism
Diimide
Excimers
Hydroxyl groups
Naphthalene
Quenching
Scanning electron microscopy
Self-assembly
Solvents
Superstructures
Tartaric acid
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Summary:Herein, we report the design and synthesis of two naphthalene diimide amphiphiles NDI-TA1 and NDI-TA2 bearing acylated and deacylated hydroxyl groups of tartaric acid, respectively. Furthermore, we investigated the influence of acylation and deacylation of hydroxyl groups of tartaric acid over UV-vis, aggregation induced emission (AIE), chirality and supramolecular self-assembly formation. A bottom-up supramolecular self-assembly formation approach of the NDI-TA1 amphiphile exhibited biomimetic hairy caterpillar-like superstructures in a THF/MCH 30 : 70 v/v solvent system, whereas long uniform helical ribbons were also yielded at a higher volume percentage of MCH in THF (90 : 10 v/v). Circular dichroism (CD) spectroscopy studies revealed a chiral aspect of the self-assembled supramolecular structures at wavelengths corresponding to their absorptions. Interestingly, NDI-TA1 aggregates at higher amounts of MCH in THF exhibited AIE properties because of excimer formation. On the other hand, the NDI-TA2 amphiphile displays total quenching of emission, i.e. the aggregation cause quenching (ACQ) effect. The SEM images of deacylated amphiphile NDI-TA2 show belt and sheet-like supramolecular self-assembled microstructures. Herein, we report the design, synthesis and self-assembly of two naphthalene diimide amphiphiles NDI-TA1 and NDI-TA2 bearing acylated and deacylated hydroxyl groups of tartaric acid, respectively.
ISSN:1144-0546
1369-9261
DOI:10.1039/c9nj05137f