Fig 1.
Molecular structure of amitriptyline hydrochloride (AMH).
Fig 2.
Synthesis route of the biodegradable cationic gemini surfactants (16-E2-16).
Table 1.
The origin and purity of the molecules utilized in the current work.
Fig 3.
Surface tension (γ) versus concentration (m) isotherms for pure amphiphiles ((A) AMT and (B) 16-E2-16) in different media at 298.15 K.
Fig 4.
Surface tension (γ) with concentration (m) isotherms for AMH-16-E2-16 mixture in different ratio (different mole fraction of 16-E2-16 (α1)): (A) aqueous solution, (B) 50 mmol∙kg-1 NaCl, (C) 500 mmol∙kg-1 NH2CONH2 solution and (D) 1000 mmol∙kg-1 NH2CONH2 solution at 298.15 K.
Table 2.
Physicochemical parameters for AMH-16-E2-16 mixtures in different media at temperature T = 298.15 K and pressure p = 0.1 MPaa.
Fig 5.
Variation of cmc/cmcid of AMH-16-E2-16 mixture versus mole fraction (α1) of 16-E2-16.
Table 3.
Surface parameters for AMH-16-E2-16 mixtures in different media at temperature T = 298.15 K and pressure p = 0.1 MPaa.
Fig 6.
Variations of ΔGom versus mole fraction of 16-E2-16 (α1) in AMH-16-E2-16 mixed systems at temperature T = 298.15 K in different media at 298.15 K.
Table 4.
Thermodynamic parameters for AMH-16-E2-16 mixtures in different media at temperature T = 298.15 K and pressure p = 0.1 MPaa.
Table 5.
Packing parameter for mixed AMH-16-E2-16 systems in different media at temperature T = 298.15 K and pressure p = 0.1 MPaa.
Fig 7.
Fluorescence spectra of 10−6 M pyrene of (A) pure 16-E2-16, and (B) 16-E2-16 (0.4) + AMH (0.6) mixture at different quencher concentrations in aqueous micellar solution.
Table 6.
Aggregation number (Nagg) and other related parameters for AMH-16-E2-16 mixtures in different media at temperature T = 298.15 K and pressure p = 0.1 MPaa.
Fig 8.
FTIR spectra of (A) 16-E2-16 in absence and presence of AMH in equal ratio and (B) AMH in absence and presence of 16-E2-16 in equal ratio.