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Aggregation, interaction and thermodynamic characteristics of cationic surfactant + moxifloxacin hydrochloride mixture in aquatic solutions of mono-/di-hydroxy compounds


Miah Muhammed Muktadir Rashid, Marzia Rahman, Mohammad Majibur Rahman, Shamim Mahbub, Dileep Kumar, Mohammad Rizwan Khan, Zeid A. Alothman, Md. Anamul Hoque

Source title: 
An International Journal at the Interface Between Chemistry and Physics, 119(6), 2021 (ISI)
Academic year of acceptance: 

Herein, the interaction of the fourth-generation fluoroquinolone antibiotic drug, moxifloxacin hydrochloride (MFH), which is extensively used for the treatment of wider ranges of bacterial infections, like pneumonia, endocarditis, tuberculosis, and other complicated dermal lesions, and cetyltrimethylammonium bromide (CTAB, a cationic surfactant) has been observed by conductivity method in aqueous, alcoholic (C2H5OH, C3H7OH-2), and diol (C2H4(OH)2, C3H6(OH)2) solutions. For all of the MFH + CTAB cases studied, the appearance of a critical micelle concentration (cmc) demonstrated that the micellar system is dependent on the variation of temperature and the concentration of different additives. A change in the value of cmc manifests the existence of strong interaction prevailing amongst MFH and CTAB molecules. In presence of alcohols/diols, the value of cmc for the MFH + CTAB system was found higher compared to those values obtained for the MFH + CTAB system carried out in H2O, which indicates a favourable micellization process. The values of counter-ion dissociation were also found to be dependent on temperature. The a values were observed negative, which, again, manifests a spontaneous micellization process. The free energy of transfer (a) and the enthalpy–entropy compensation were also calculated and discussed.

Graphical abstract