Customized tuning of aggregation-induced emission of a napthalimide dye by surfactants and cyclodextrin

[Display omitted] The aggregation-induced emission behaviour of an environment sensitive 2,3-substituted napthalimide dye has been investigated at neutral pH in presence of three different surfactants i.e., cationic, anionic, and neutral. The changes observed in the excitation spectrum of the dye co...

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Published in:Journal of colloid and interface science 2017-08, Vol.499, p.46-53
Main Authors: Mallick, Suman, Arathi, Anil S., Koner, Apurba L.
Format: Article
Language:English
Subjects:
Aggregation-induced emission
Critical micelle concentration
Cyclodextrin
Naphthalimide dye
Surfactants
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description [Display omitted] The aggregation-induced emission behaviour of an environment sensitive 2,3-substituted napthalimide dye has been investigated at neutral pH in presence of three different surfactants i.e., cationic, anionic, and neutral. The changes observed in the excitation spectrum of the dye compared to its absorption spectra in water in presence of the surfactants above their micellar concentration reveals the transformation of the H-aggregates of the dye to the monomeric form. The alteration of the dye aggregates to its monomeric form and its consequence on emission properties has been utilized to estimate the surfactant concentration parameter for pre-micellar to micellar transformation. The aggregation of the dye molecules has been made reversible by removal of the surfactant molecules from the system upon host-guest complexation with α-cyclodextrin. This switchable aggregation-deaggregation phenomenon of DMN-Bu by employing surfactants and α-cyclodextrin at neutral pH in water is utilized for determining their critical micellar concentration.
doi_str_mv 10.1016/j.jcis.2017.03.097
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subjects Aggregation-induced emission
Critical micelle concentration
Cyclodextrin
Naphthalimide dye
Surfactants
title Customized tuning of aggregation-induced emission of a napthalimide dye by surfactants and cyclodextrin
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