Electrostatic and Hydrophobic Interactions during Complex Formation and Electron Transfer in the Ferredoxin/Ferredoxin:NADP+Reductase System fromAnabaena

Molecular dynamics simulation reveals distinctive roles of electrostatic and hydrophobic interactions in surfactant (SDS)–protein (AqpZ) complex formation and functionality.

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Formation of CT complexes and electron transfer from excited molecules of anthracene derivatives to methylviologen in aqueous and micellar media

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19871658 ◽

1987 ◽

Vol 52 (7) ◽

pp. 1658-1665

Author(s):

Viktor Řehák ◽

Jana Boledovičová

Keyword(s):

Electron Transfer ◽

Complex Formation ◽

Fluorescence Quenching ◽

Rate Constant ◽

Formation Constants ◽

Dynamic Quenching ◽

Micellar Media ◽

Complex Formation Constants ◽

Anthracene Derivatives ◽

Ct Complexes

Disodium 1,5- and 1,8-anthracenedisulphonate (ADS) and 9-acetylanthracene form coloured CT complexes with methylviologen (MV2+) in aqueous and micellar media. The complex formation constants and molar absorptivities were determined by the Benesi-Hildebrandt method. In the fluorescence quenching, its static component plays the major role. The dynamic quenching component is determined by the rate constant of electron transfer from the S1 state of ADS to MV2+.

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Complex formation followed by internal electron transfer: the reaction of [ethylenebis(biguanide)]silver(III) with ascorbic acid

Journal of the Chemical Society Dalton Transactions ◽

10.1039/dt9930000567 ◽

1993 ◽

pp. 567 ◽

Cited By ~ 8

Author(s):

Subrata Dasgupta ◽

Erwin Herlinger ◽

Wolfgang Linert

Keyword(s):

Electron Transfer ◽

Ascorbic Acid ◽

Complex Formation ◽

Internal Electron

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Interaction of sulphone based reactive dyes with cationic surfactant: a spectroscopic and conductometric study

Zeitschrift für Physikalische Chemie ◽

10.1515/zpch-2020-1706 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Misbah Iram ◽

Hamadia Sultana ◽

Muhammad Usman ◽

Bazgha Ahmad ◽

Nadia Akram ◽

...

Keyword(s):

Strong Interaction ◽

Cetyltrimethylammonium Bromide ◽

Hydrophobic Interactions ◽

Reactive Dyes ◽

Micellar System ◽

Palisade Layer ◽

Micellar Systems ◽

Gibbs Energies ◽

Electrostatic And Hydrophobic Interactions ◽

Conductometric Study

Abstract Interaction of sulphone based reactive dyes, designated as dye-1 and dye-2, with cationic micellar system of cetyltrimethylammonium bromide (CTAB), has been investigated by spectroscopic and conductometeric measurements. Efficiency of the selected micellar systems is assessed by the values of binding constant (K b ), partition coefficient (K x ) and respective Gibbs energies. Critical micelle concentration (CMC) of surfactant, electrostatic and hydrophobic interactions as well as polarity of the medium plays significant role in this phenomenon. The negative values of Gibbs energies of binding (∆G b ) and partition (∆G p ) predicts the feasibility and spontaneity of respective processes. Similarly negative values of ∆G m and ∆H m and positive values of ∆S m , calculated from conductometeric data, further, revealed the exothermicity, spontaneity and, thus, stability of system. The results, herein, have disclosed the strong interaction between dye and surfactant molecules. The dye-2 has been observed to be solubilized to greater extent, as compared to dye 1, due to strong interaction ith hydrophiles of CTAB and accommodation of its molecules in palisade layer of micelle closer to the micelle/water interface.

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