Self-assembling systems based on diquaternized derivatives of 1,4-diazabicyclo[2.2.2]octane

Nontoxic antimicrobial micellar systems based on mono- and dicationic Dabco-surfactants and furazolidone: Structure-solubilization properties relationships

“…2b and c, N agg decreases upon increasing size of surfactant head group. By tensiometry, it was found that the minimal surface area per mono-CS-n surfactant molecule is less than per di-CS-n surfactant [38]. The reduction of mutual repulsion in micelle permits closer packing of the head groups, leading to a significant increase in N agg .…”

“…Dicationic surfactants of 1,4-diazabicyclo[2.2.2]octane were made by quarterization of mono-CS with ethyl bromide. All details about syntheses were described earlier [38]. N-Methyl-D-glucamine (99%, ACROS Organics, NJ, USA), cetyltrimethylammonium bromide (CTAB, 99%, DK, Acros), 1-(o-tolylazo)-2-naphthol (75%, Orange OT, Aldrich, USA), 1-phenylazo-2-naphthol (Sudan I, Acros Organics), furazolidone (98%, Alfa Aesar, Heysham, England), hexamethyldisiloxane (HMDSO, Aldrich), Triton-X-100 (ACROS Organics, NJ, USA), Sodium dodecyl sulfate (SDS, 99%, ACROS Organics, NJ, USA) were used as purchased.…”

“…where M ef is the effective mass of surfactant micelles, M ef = 500, determined taking into account the degree of binding with the countermicelle (β) from [38], C t is surfactant concentration in solution, ρ is the density of the micellar surfactant, V is volume of the solution. Hexamethyldisiloxane (HMDSO) was used as a micellar solubilized molecule in order to determine the SDC of micelles.…”

“…Our research group focused on amphiphilic derivatives of 1,4diazabicyclo [2.2.2]octane (Dabco) [37][38][39]. Some interesting features in self-assembly behavior and functional activity (high catalytic effect, solubilization properties, antimicrobial activity) of Dabco-surfactants were shown [40][41][42][43].…”

Engineered mesoporous ionic‐modified γ‐Fe2O3@hydroxyapatite decorated with palladium nanoparticles and its catalytic properties in water

“…1,4‐Diazabicyclo[2.2.2]octane (DABCO) has been used as a catalyst for some organic transformations such as aza‐Michael addition, Knoevenagel condensation, allylic trifluoromethylthiolation of Morita–Baylis–Hillman carbonates, N ‐methylation of indoles and nucleophilic substitution reactions of benzyl halides. DABCO can chemically be grafted to the surface of γ‐Fe 2 O 3 @hydroxyapatite (MHA), and the dual role of ionic‐modified MHA, with organophilic and hydrophilic characteristics, can lead to reactant compounds and Pd NPs in a solid support physically coming together …”