Aggregation and surface behavior of aqueous solutions of cis-bis(1,3-diaminopropane)bis(dodecylamine)cobalt(<scp>iii</scp>) nitrate. A double-chained metallosurfactant

Wagay, Tariq Ahmad; Dey, Jahar; Kumar, Sugam; Aswal, Vinod K.; Ismail, K.

doi:10.1039/c6ra04199j

Cited by 12 publications

(4 citation statements)

References 68 publications

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“…The increasing hydrophilicity of the K, Na, and Li counterions can decrease their affinity for the surfactant molecules. − Therefore, our alkali salt products with different counterions showed similar conductivity results. As previously reported, the β values of cationic silicone surfactants were always larger than those of our products, most of which are alkalescent salts, and the hydrophobicity of the counterions with surfactant headgroups would increase their binding with each other. ,,, …”

Section: Resultssupporting

confidence: 65%

“…As previously reported, the β values of cationic silicone surfactants were always larger than those of our products, most of which are alkalescent salts, and the hydrophobicity of the counterions with surfactant headgroups would increase their binding with each other. 18,27,45,46 As shown in Table 1, the CAC values of the three surfactants that were determined by electrical conductivity were similar, but it still can be seen that with the counterion hydrophilicity decreased, the CAC values decreased correspondingly. Compared to the lithium ion (Li + ), the potassium ion (K + ), with the smallest hydrated ion radius, could penetrate the Stern layer and reduce the charge repulsion of the headgroups more efficiently.…”

Section: ■ Experimental Sectionmentioning

confidence: 70%

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Synthesis, Properties, and Aggregation Behavior of Tetrasiloxane-Based Anionic Surfactants

et al. 2018

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Three silicone surfactants, 3-tris(trimethylsiloxy)silylpropyl sulfonate with different alkaline counterions (lithium, sodium, and potassium), were synthesized for the first time. Their chemical structures were confirmed by FT-IR spectra, H NMR, and ESI-MS, and their behaviors in aqueous solutions were investigated by surface tensiometry, electrical conductivity, dynamic light scattering, and different transmission electron microscopy techniques. These anionic silicone surfactants exhibited remarkable surface activity and could reduce the surface tension of water to as low as 19.8 mN/m at the critical aggregate concentration (CAC). The adsorption and aggregation behaviors of these surfactants were assessed by determining the adsorption efficiency, minimum average area per surfactant molecule, and thermodynamic parameters. The cryo-TEM results verified that these molecules could form vesicles in water above the CAC. Moreover, the lowest surface tension, the smallest CAC value, and the largest aggregate size have been reached with potassium counterions. Thus, the different behavior of these surfactants in water can be explained by the different sizes of the hydrated ions.

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Section: Resultssupporting

confidence: 65%

Section: ■ Experimental Sectionmentioning

confidence: 70%

Synthesis, Properties, and Aggregation Behavior of Tetrasiloxane-Based Anionic Surfactants

et al. 2018

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“…The various standard thermodynamic properties of micellizaton, namely, standard free energies of micellization (

normalΔ G_{m}^{0} true)

, standard enthalpies of micellization (

normalΔ H_{m}^{0}

), standard entropies of micellization (

normalΔ S_{m}^{0}

) and Gibb's free energies of transfer (

normalΔ G_{trans}^{0}

) of the CHCC metallosurfactant have been evaluated by using the Equations () (Kolay et al, 2008; Wagay et al, 2016b):

normalΔ G_{m}^{0} goodbreak= italicRT ((), 1 goodbreak+ β) \ln X_{cmc},

normalΔ H_{m}^{0} goodbreak= goodbreak- {RT}^{2} ((), 1 goodbreak+ β) {(\frac{d \ln X_{cmc}}{dT})}_{P},

normalΔ S_{m}^{0} goodbreak= \frac{normalΔ H_{m}^{0} - normalΔ G_{m}^{0}}{T},

normalΔ G_{trans}^{0} goodbreak= normalΔ G_{m}^{0} ((), italicEG goodbreak+ italicWR) goodbreak- normalΔ G_{m}^{0} ((), WR),

where T and R designate the absolute temperature and universal gas constant, respectively.

β

represents the counterion binding constant value.…”

Section: Resultsmentioning

confidence: 99%

“…The various standard thermodynamic properties of micellizaton, namely, standard free energies of micellization (ΔG 0 m Þ, standard enthalpies of micellization (ΔH 0 m ), standard entropies of micellization (ΔS 0 m ) and Gibb's free energies of transfer (ΔG 0 trans ) of the CHCC metallosurfactant have been evaluated by using the Equations ( 5)-( 8) (Kolay et al, 2008;Wagay et al, 2016b):…”

Section: Thermodynamics Of Metallomicelle Formationmentioning

confidence: 99%

Aggregation and adsorption behavior of cobalt‐based metallosurfactant in water–ethylene glycol media forming worm‐like micelles

Charingia

Shergujri

Suting

et al. 2022

J Surfact & Detergents

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The cobalt based metallosurfactant cis-chlorobis(ethylenediamine)hexadecylaminecobalt(III) chloride (CHCC) has been prepared and well characterized by utilizing elemental analysis, NMR ( 1 H, 13 C), FT-IR and UV-Vis spectroscopy. The CHCC metallosurfactant shows thermal stability up to 168 C. The micellization behavior of the synthesized CHCC metallosurfactant has been investigated systematically by the tensiometric, conductometric, and fluorescence techniques. The critical micelle concentration (cmc) values of CHCC have been determined in various water-ethylene glycol mixtures ranging from 0 to 100 weight % of ethylene glycol at 293.15, 298.15, 303.15, and 308.15 K. The physicochemical parameters namely counterion binding constant, surface pressure, surface excess, surface area covered per CHCC metallosurfactant molecule, free energy minimum, standard free energies of micellization and adsorption, standard enthalpy and entropy of micellization, and Gibb's free energy of transfer have been calculated. The hydrodynamic diameters and zeta potentials of the CHCC metallomicelles have been measured by dynamic light scattering method. Transmission electron microscopy was employed to confirm the presence of worm-like micelles.

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Metallosurfactants, a “Novel Portmanteau”: A Holistic Insight into the Structural–Physiognomies Relationships, Synthesis Stratagems, and Characterization

2022

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Aggregation and surface behavior of aqueous solutions of cis-bis(1,3-diaminopropane)bis(dodecylamine)cobalt(iii) nitrate. A double-chained metallosurfactant

Abstract: Metallosurfactants or amphiphilic metal complexes are emerging as a new class of material with a range of properties inherent to both metal complexes and surfactants.

Cited by 12 publications

References 68 publications

Synthesis, Properties, and Aggregation Behavior of Tetrasiloxane-Based Anionic Surfactants

Synthesis, Properties, and Aggregation Behavior of Tetrasiloxane-Based Anionic Surfactants

Aggregation and adsorption behavior of cobalt‐based metallosurfactant in water–ethylene glycol media forming worm‐like micelles

Metallosurfactants, a “Novel Portmanteau”: A Holistic Insight into the Structural–Physiognomies Relationships, Synthesis Stratagems, and Characterization

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