Solvatochromism of 1-naphthol-4-sulfonate photoacid and its encapsulation in cyclodextrin derivatives

Amer, Aya S.I.; Alazaly, Ahmed M.M.; Abdel-Shafi, Ayman A.

doi:10.1016/j.jphotochem.2018.09.013

Cited by 18 publications

(8 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These versatile properties could be further manipulated by employing solvent mixtures with perturbed hydrogen-bond dynamics, [68][69][70][71][72][73][74] applying high pressures [26,[75][76][77] or spatially encapsulating the compound. The latter approach was demonstrated for other photoacids confined in small solvent droplets, [16] as e. g. also possible in (reverse) micelles, [24,[78][79][80][81][82][83][84][85][86] or small container molecules, [87][88][89] which further alters the ESPT characteristics.…”

Section: Discussionmentioning

confidence: 99%

Excited‐State Proton Transfer Dynamics of a Super‐Photoacid in Acetone‐Water Mixtures

et al. 2022

View full text Add to dashboard Cite

Super‐photoacids, that is, photoacids with a negative pKnormala value in the electronically excited state, can trigger an excited‐state proton transfer (ESPT) to the solvent. For the neutral pyranine‐derived super‐photoacid studied here, even indications for ESPT in acetoneous solution are reported. The characteristics of ESPT in this environment, that is, which intermediates exist and what the impact of cosolvents is, remain unsettled though. In this work, we study ESPT in acetone‐water mixtures by steady‐state and time‐resolved fluorescence spectroscopy. Various effects are observed: First, the addition of water supports the formation of a hydrogen‐bonded ground‐state complex comprising one water molecule and the photoacid, whose excitation triggers the formation of a hydrogen‐bonded ion pair on a sub‐ns time scale. Second, water has an overall accelerating effect on the fluorescence dynamics of the involved emitting species, whose contributions are disentangled in a global analysis scheme, enabling the identification of emission from the free photoacid, a photoacid‐water complex, a hydrogen‐bonded ion pair, and the deprotonated photoacid. At least two water molecules are necessary for ESPT in the environment. Third, additional acidification thwarts an efficient ground‐state complex formation of the photoacid and water. However, upon excitation, complexation may occur on a timescale faster than the photoacid's excited‐state lifetime, so that emission from a nascent complex emerges.

show abstract

Section: Discussionmentioning

confidence: 99%

Excited‐State Proton Transfer Dynamics of a Super‐Photoacid in Acetone‐Water Mixtures

et al. 2022

View full text Add to dashboard Cite

show abstract

“…In the experiment of ALP and CD's the maxima in the Job' plots were obtained at R ≈ 0.5 which is the indication of 1:1 stoichiometry of ALP and CD ICs (Figs. 2a-c) [26][27][28][29].…”

Section: Job Plotmentioning

confidence: 99%

Probing Subsistence of Host Guest Inclusion Complexes of Oligosaccharides with Allopurinol for Regulatory Release with the Manifestation of Solvation Consequences

Mondal¹,

Dutta²,

Das³

et al. 2019

JACS

View full text Add to dashboard Cite

Paramita Karmakar, et al., Probing subsistence of host guest inclusion complexes of oligosaccharides with allopurinol for regulatory release with the manifestation of solvation consequences, J. Adv. Chem. Sci. 5(1) (2019) 621-628. The inspection of molecular interaction widespread in allopurinol and in aqueous solutions of α-, -and HP-β-cyclodextrin have been probed by thermophysical properties. The established complexes obtained with 1:1 stoichiometry. Role of solvent (aqueous solution of α-CD, -CD, HP-β-CD) and contribution of solute-solute and solute-solvent interactions to solution complexes, have also been analyzed via stability constant-NMR, UV, steady state fluorescence, FTIR, HRMS, SEM, PXRD, cytotoxicity, hydrophobic effect, hydrogen-bonding, structural effects in creation of inclusion complexes. Cite this Article as: Jaygopal Mondal, Ashutosh Dutta, Koyeli Das, Debasmita Das, Paramita Karmakar, et al., Probing subsistence of host guest inclusion complexes of oligosaccharides with allopurinol for regulatory release with the manifestation of solvation consequences, J. Adv. Chem. Sci. 5(1) (2019) 621-628.

show abstract

“…35,36 The use of solvatochromic parameters to model solvent-dependent excitation energies is a well-established procedure, and has been used to elucidate the environmental interactions relevant to a wide range of inorganic and organic molecules. 31,34,37,38 Solvatochromic analysis is a particularly valuable tool for understanding environmental effects on valence tautomeric systems, as the combination of a redox-active ligand and redox-active metal often leads to solvatochromic charge transfer bands. 39,40 In previous studies, we have focussed on variation of the ancillary ligand in cobalt-dioxolene systems as a way of tuning valence tautomerism.…”

Section: Introductionmentioning

confidence: 99%

Rich redox-activity and solvatochromism in a family of heteroleptic cobalt complexes

et al. 2021

View full text Add to dashboard Cite

show abstract

Solvatochromism of 1-naphthol-4-sulfonate photoacid and its encapsulation in cyclodextrin derivatives

Cited by 18 publications

References 66 publications

Excited‐State Proton Transfer Dynamics of a Super‐Photoacid in Acetone‐Water Mixtures

Excited‐State Proton Transfer Dynamics of a Super‐Photoacid in Acetone‐Water Mixtures

Probing Subsistence of Host Guest Inclusion Complexes of Oligosaccharides with Allopurinol for Regulatory Release with the Manifestation of Solvation Consequences

Rich redox-activity and solvatochromism in a family of heteroleptic cobalt complexes

Contact Info

Product

Resources

About