ChemInform Abstract: Dependence of in vitro Enzymic Hydrolysis of Alkyl(2‐benzoyloxyethyl)dimethylammonium Bromides on the Alkyl Length.

E, Olaszova; Paulíková, I; Helia, O; Švajdlenka, Emil; Devı́nsky, Ferdinand; Lacko, I.

doi:10.1002/chin.199825057

ChemInform

1998

DOI: 10.1002/chin.199825057

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ChemInform Abstract: Dependence of in vitro Enzymic Hydrolysis of Alkyl(2‐benzoyloxyethyl)dimethylammonium Bromides on the Alkyl Length.

Olaszova E

I Paulíková

O Helia

et al.

Abstract: biochemical syntheses, microbiological syntheses biochemical syntheses, microbiological syntheses O 0035 -057Dependence of in vitro Enzymic Hydrolysis of Alkyl(2benzoyloxyethyl)dimethylammonium Bromides on the Alkyl Length.-Microsomal esterases are used in the study of the in vitro enzymic hydrolysis of the ester bond in the title compounds, which prove to be potential "soft" disinfectants. They exhibit high activity against the microorganisms tested. An activity increase with the alkyl chain length is found w… Show more

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Self-aggregation of cationic gemini surfactants with amide groups in the spacer and variable alkyl chain length

Pisárčik,

Bajcura,

Lukáč

et al. 2023

Colloid Polym Sci

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Synthesis, aggregation parameters and antimicrobial activity of novel cationic gemini surfactants with two amide groups in gemini spacer structure and a variable number of carbon atoms in alkyl tails ranging from 12 to 15 are reported. The critical micelle concentration of gemini surfactants was determined using surface tension and electrical conductivity methods. The cmc values were found in the range 0.83 to 0.06 mM. The interfacial area, micelle ionisation degree and the Gibbs free energy per molecule and alkyl chain were calculated from the surface tension and conductivity curves. Particle size analysis using the dynamic light scattering method confirmed the formation of small spherical micelles 6–7 nm large in size for gemini surfactants with 12 and 13 carbon atoms in the alkyl chain. A large size above 50 nm was found for the aggregates composed of long-chain gemini molecules with 14 and 15 carbon atoms. The zeta potential of gemini surfactants shows a continuous increase with the increasing alkyl chain length. Micelle aggregation number of gemini surfactants correlates well with the hydrodynamic size data. Small aggregation number values were found for short-chain gemini molecules with 12 and 13 carbon atoms in the alkyl chain. Long-chain gemini molecules with 14 and 15 carbon atoms exhibit aggregate growth represented by an increase in the aggregation number values while maintaining the spherical or spheroidal shape of micelles. The investigations of antimicrobial activity against Gram-positive bacteria, Gram-negative bacteria and yeast indicate the increasing antimicrobial efficiency towards the short-chain surfactant with 12 carbon atoms in the alkyl chain. A possible cut-off effect presence is proposed to explain the dependence of antimicrobial activity on the surfactant alkyl tail length.

show abstract

Self-aggregation of cationic gemini surfactants with amide groups in the spacer and variable alkyl chain length

Pisárčik,

Bajcura,

Lukáč

et al. 2023

Colloid Polym Sci

View full text Add to dashboard Cite

show abstract

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ChemInform Abstract: Dependence of in vitro Enzymic Hydrolysis of Alkyl(2‐benzoyloxyethyl)dimethylammonium Bromides on the Alkyl Length.

Cited by 1 publication

References 1 publication

Self-aggregation of cationic gemini surfactants with amide groups in the spacer and variable alkyl chain length

Self-aggregation of cationic gemini surfactants with amide groups in the spacer and variable alkyl chain length

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