Effects on the photophysical properties of naphthylamine derivatives upon their inclusion in cyclodextrin nanocavities

Akl, Hossam N.; Alazaly, Ahmed M.M.; Salah, Dina; Abdel‐Samad, Hesham S.; Abdel-Shafi, Ayman A.

doi:10.1016/j.molliq.2020.113319

Cited by 7 publications

(2 citation statements)

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“…5. In contrast to our previous observation [2,[6][7][8][9][10] that the dependence of  on E T N always presented two groups of solvents one for protic and other for aprotic solvents, the current set of compounds show linear dependence for 1NA4S and 2NA6S on E T N as shown in Fig. 5.…”

Section: Resultscontrasting

confidence: 99%

“…ICT compounds are characterized by the existence of an electron-donating and electron withdrawing moieties linked by -bridge (D--A). Research interests in ICT systems are also extended for the study of molecular systems having an intermolecular charge transfer excited state but greatly influenced by specific interactions [2][3][4][5][6][7][8][9][10]. For molecular systems with excited state intramolecular charge transfer (ESICT) phenomenon, in most cases the observed dual emission arises from the locally (LE) and intramolecular charge transfer (ICT) states.…”

Section: Introductionmentioning

confidence: 99%

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Solvent Effect on the Excited Charge Transfer State of Naphthylamine Sulfonate Derivatives: Steady State and Time resolved studies

et al. 2022

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Solvent effect on the absorption and fluorescence emission spectra of 1-naphthylamine-4-sulfonate (1NA4S) and 2naphthylamine-6-sulfonate (2NA6S) were investigated. Excited state fluorescence decay measurements were also measured in different solvents. The spectral shifts are well correlated with several multiparametric relationships that predict the participation hydrogen bonding interactions (specific) versus non-hydrogen bonding interactions (non-specific) on the photophysical properties. Kamlet-Taft with their three parametric relationship which was then improved by Catalán by splitting the * (dipolarity/polarizability) to parameters namely, solvent"s polarizability) solvent"s dipolarity, and very recently Laurence relationships. The three-parameter relationship by Kamlet-Taft has shown that the absorption energy is mainly controlled by specific interactions while the emission energy is controlled by the non-specific interactions. On the other hand, Catalán"s treatment has shown that non-specific interaction has higher contribution to the emission energy than predicted by Kamlet-Taft treatment. Laurence"s treatment has shown that hydrogen bonding interaction has higher contribution than non-hydrogen bonding interactions to the emission energy for both compounds while they contribute equally to their absorption energy.

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