Studies on Hydrophobic Effect and Micelle Formation of Some Surfactant-Cr(III)-Cetylamine Complexes in Non-aqueous Solvents

Kumaraguru, N.; Santhakumar, Kannappan

doi:10.1007/s10953-009-9396-1

Cited by 20 publications

(9 citation statements)

References 47 publications

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“…This may be due to the increase in the size of the substituent that makes the complex more weakly solvated. Weakly solvated ions can be adsorbed more readily by the micellar surface [15,32]. Similar to our previous reports, the CMC values for the cobalt(III) cobaloxime complexes in the present study are very low compared to that of the simple organic surfactant, dodecylammonium chloride (CMC = 1.5 3 10 -2 mol dm -3 ).…”

Section: Critical Micelle Concentrations Valuessupporting

confidence: 89%

Synthesis, structure, CMC values, thermodynamics of micellization, steady-state photolysis and biological activities of hexadecylamine cobalt(III) dimethyl glyoximato complexes

Chandar

Sangeetha

Arumugham³

2011

Transition Met Chem

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Metallosurfactant complexes of the type trans-[Co(DH) 2 (HA)X], where DH = Dimethyl glyoxime, HA = Hexadecyl amine and X = Cl -, Br -, I -, N 3 -, NO 2 or SCN -, were synthesized and characterized by physicochemical and spectroscopic methods. In addition, the single crystal X-ray structure of the ionic complex trans-[Co(DH) 2 (HA) 2 ][Co(DH) 2 (I) 2 )] is presented. The critical micelle concentration values of the complexes in ethanol were obtained by measuring the absorption at 290 nm. Specific conductivity data (at 303-313 K) served for the evaluation of the thermodynamics of micellization DG 0 m ; DH 0 m ; DS 0 m À Á . Steady-state photolysis, cyclic voltammetry and biological activities of the complexes were studied. The compounds were tested for antimicrobial activity. Electronic supplementary material The online version of this article (

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Section: Critical Micelle Concentrations Valuessupporting

confidence: 89%

Synthesis, structure, CMC values, thermodynamics of micellization, steady-state photolysis and biological activities of hexadecylamine cobalt(III) dimethyl glyoximato complexes

Chandar

Sangeetha

Arumugham³

2011

Transition Met Chem

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“…In fact, these types of osmolytes can simply behave like surfactants, which typically denature proteins. , Thus, the data presented herein indicate that the efficacy of the powerful protein stabilizer, TMAO, may partly lie in its specific unfavorable interactions with hydrophobic groups on proteins. Recent studies have implicated hydrophobicity as being a crucial factor in many biological and chemical processes ranging from micelle formation − and enzyme catalysis − to protein folding. − …”

Section: Discussionmentioning

confidence: 99%

Methyl Groups of Trimethylamine N-Oxide Orient Away from Hydrophobic Interfaces

et al. 2011

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The molecular orientation of trimethylamine N-oxide (TMAO), a powerful protein stabilizer, was explored at aqueous/hydrophobic interfaces using vibrational sum frequency spectroscopy (VSFS). The systems studied included the octadecyltrichlorosilane (OTS)/water interface, which represents an aqueous solution in direct contact with a hydrophobic medium. Surprisingly, the measurements revealed that the methyl groups of TMAO pointed into the aqueous phase and away from the OTS. This orientation may arise from the more hydrophilic nature of methyl groups attached to a strongly electron-withdrawing atom such as a quaternary nitrogen. Additional studies were performed at the air/water interface. This interface showed a high degree of TMAO alignment, but the dangling OH from water was present even at 5 M TAMO. Moreover, the addition of this osmolyte modestly increased the surface tension of the interface. This meant that this species was somewhat depleted at the interface compared to the bulk solution. These findings may have implications for the stabilizing effect of TMAO on proteins. Specifically, the strong hydration required for the methyl groups as well as the oxide moiety should be responsible for the osmolyte's depletion from hydrophobic/aqueous interfaces. Such depletion effects should help stabilize proteins in their folded and native conformations on entropic grounds, although orientational effects may play an additional role.

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“…The max  is maximum value that gives the extent of effectiveness of the adsorption. The max  values of the drugs have been calculated by using Gibbs adsorption equations [37]:…”

Section: Interfacial Parametersmentioning

confidence: 99%

Thermodynamics and Micellar Behavior of Surface-Active Drugs in Aqueous Solution of Electrolytes: Surface Tension Study

Sharma¹,

Singh²,

Sharma³

et al. 2022

SSRN Journal

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Studies on Hydrophobic Effect and Micelle Formation of Some Surfactant-Cr(III)-Cetylamine Complexes in Non-aqueous Solvents

Cited by 20 publications

References 47 publications

Synthesis, structure, CMC values, thermodynamics of micellization, steady-state photolysis and biological activities of hexadecylamine cobalt(III) dimethyl glyoximato complexes

Synthesis, structure, CMC values, thermodynamics of micellization, steady-state photolysis and biological activities of hexadecylamine cobalt(III) dimethyl glyoximato complexes

Methyl Groups of Trimethylamine N-Oxide Orient Away from Hydrophobic Interfaces

Thermodynamics and Micellar Behavior of Surface-Active Drugs in Aqueous Solution of Electrolytes: Surface Tension Study

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