10.1021/acs.jced.8b00815.s001
Ziyafaddin
H. Asadov
Ziyafaddin
H.
Asadov
Gulnara A. Ahmadova
Gulnara A.
Ahmadova
Ravan A. Rahimov
Ravan A.
Rahimov
Seyid-Zeynab F. Hashimzade
Seyid-Zeynab F.
Hashimzade
Etibar H. Ismailov
Etibar H.
Ismailov
Nahida Z. Asadova
Nahida Z.
Asadova
Samira A. Suleymanova
Samira A.
Suleymanova
Fedor I. Zubkov
Fedor I.
Zubkov
Ayaz M. Mammadov
Ayaz M.
Mammadov
Durna B. Agamaliyeva
Durna B.
Agamaliyeva
Micellization and Adsorption Properties of New Cationic
Gemini Surfactants Having Hydroxyisopropyl Group
American Chemical Society
2019
surface area
surface tensions
aggregates decrease
Hydroxyisopropyl Group
CMC
micellization concentration
C n C 2 C n
adsorption parameters
cationic surfactants
diameter
temperature rise
NH
binding degree
tensiometric methods
SRB
CH
cationic gemini surfactants
Adsorption Properties
New Cationic Gemini Surfactants
Via conductometric
Antibacterial properties
sulfate-reducing bacteria
tail chain length
2019-02-20 18:15:48
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Micellization_and_Adsorption_Properties_of_New_Cationic_Gemini_Surfactants_Having_Hydroxyisopropyl_Group/7746905
A series
of cationic gemini surfactants, <i>N</i>,<i>N</i>′-bis(alkyl)-<i>N</i>,<i>N</i>′-bis(2-hydroxypropyl)ethylenediammonium
dibromide, [C<sub><i>n</i></sub>H<sub>2<i>n</i>+1</sub>(CH<sub>3</sub>CH(OH)CH<sub>2</sub>)NH(CH<sub>2</sub>)<sub>2</sub>NH(CH<sub>2</sub>CH(OH)CH<sub>3</sub>)C<sub><i>n</i></sub>H<sub>2<i>n</i>+1</sub>]Br<sub>2</sub> (where <i>n</i> is the
tail chain length, <i>n</i> = 9, 12, and 14), referred to
as C<sub><i>n</i></sub>C<sub>2</sub>C<sub><i>n</i></sub>[iso-Pr(OH)] was synthesized. Via conductometric and tensiometric
methods, at different temperatures (283 to 313 K), specific electrical
conductivities and surface tensions of the aqueous solutions of these
cationic gemini surfactants were determined. According to the obtained
values, micellization and adsorption parameters such as critical micellization
concentration (CMC), maximum surface excess (Γ<sub>max</sub>), minimal cross sectional surface area of surfactant polar group
(<i>A</i><sub>min</sub>), adsorption efficiency (pC<sub>20</sub>), surface pressure (π), and binding degree of counterion
(β) were calculated. The values of standard Gibbs free energy
(Δ<i>G</i>°), enthalpy (Δ<i>H</i>°), and entropy (Δ<i>S</i>°) were also
computed. Via the dynamic light scattering method, diameters of aggregates
of the synthesized cationic gemini surfactants were determined in
water. It was established that the diameters of these aggregates decrease
with a temperature rise. Antibacterial properties of the synthesized
cationic surfactants against sulfate-reducing bacteria (SRB) were
studied.