Absorption spectra of nitroanilines in micellar solution-II

Spectrophotometric study on the thermodynamics of binding of α- and β-cyclodextrin towards some p-nitrobenzene derivativesElectronic supplementary information (ESI) available: Values of inclusion constants at different temperatures. See http://www.rsc.org/suppdata/ob/b3/b300330b/

“…Also on the basis of computational models 14 (both dynamic and "simulated annealing" simulations) we may reasonably assume that guests 1-13 should prefer the former inclusion mode, as a consequence of the remarkable interaction between the polarised p-nitrophenyl moiety and the intrinsic dipole momentum owned by the cyclodextrin cavity. 18 Thus, owing to the local electric field effect, and in agreement with the observed behaviour of p-nitroaniline in solvents of increasing dielectric constant, 19 inclusion of studied substrates in the cyclodextrin cavity may generally be expected to cause a bathocromic shift of the UV-vis absorption for the p-nitroaniline-like chromophore (Fig. 2a).…”

Spectrophotometric and Thermodynamic Studies of Micellar Interaction of Surfactants withp-Nitrophenol

“…[23,24] Spectroscopic technique is, therefore, commonly used to gain insight about the nature and extent of driving force for the interaction between the polarizable molecules and micelles. [10,22,25] Spectroscopic investigations were also done to study similar interactions between substituted phenols and anilines with surfactants. [16,25] In the present work, we have studied spectrophotometrically, the interaction behavior of p-nitrophenol (NPH) in aqueous media, in the absence and presence of differently charged surfactants (above their CMCs), viz., sodium dodecylsulphate, SDS (anionic), cetylpyridinium chloride, CPC (cationic) and Triton X-100 (nonionic).…”

“…[10,22,25] Spectroscopic investigations were also done to study similar interactions between substituted phenols and anilines with surfactants. [16,25] In the present work, we have studied spectrophotometrically, the interaction behavior of p-nitrophenol (NPH) in aqueous media, in the absence and presence of differently charged surfactants (above their CMCs), viz., sodium dodecylsulphate, SDS (anionic), cetylpyridinium chloride, CPC (cationic) and Triton X-100 (nonionic). The study was also performed at varying temperatures and the thermodynamic quantities associated with these interactions were determined.…”