title: Rational Design and Synthesis of Carboxylate Gemini Surfactants with an Excellent Aggregate Behavior for Nano-La2O3Morphology-Controllable Preparation.
abstract: A series of carboxylate gemini surfactants (CGS, Cn-Φ-Cn, n = 12, 14, 16, 18) with diphenyl ketone as a spacer group were prepared using a simple and feasible synthetic method. These CGS exhibited an excellent surface activity with extremely low critical micelle concentration (CMC) value (approximately 10-5mol/L), good performance in reducing surface tension (nearly 30 mN/m), and the ability of molecular self-assembly into different aggregate morphologies via adjusting the concentrations, which is attributed to the introduction of diphenyl ketone and carboxylic acid ammonium salt in the molecular structure. Moreover, the surface activity and self-assembly ability of CGS were further optimized by tuning the length of the tail chain. These excellent properties imply that CGS can be a soft template to prepare nanomaterials, especially in morphology-controllable synthesis. By adjusting the concentration of one of CGS (C12-Φ-C12), nano-La2O3particles with diverse morphologies were obtained, including spherical shape, bead-chain shape, rod shape, velvet-antler shape, cedar shape, and bowknot shape. This work offers a vital insight into the rational design of template agents for the development of morphology-controllable nanomaterials.
authors.affiliation: College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, Hubei, PR China.|Key Laboratory of Biomedical Polymers, Ministry of Education , Wuhan 430072, Hubei, PR China.
authors.forename: Xueming
authors.initials: X
authors.lastname: Liao
authors.affiliation: College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, Hubei, PR China.|Key Laboratory of Biomedical Polymers, Ministry of Education , Wuhan 430072, Hubei, PR China.
authors.forename: Zhinong
authors.identifier: 0000-0003-2855-5334
authors.initials: Z
authors.lastname: Gao
authors.affiliation: College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, Hubei, PR China.|Key Laboratory of Biomedical Polymers, Ministry of Education , Wuhan 430072, Hubei, PR China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Xia
authors.affiliation: College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, Hubei, PR China.|Key Laboratory of Biomedical Polymers, Ministry of Education , Wuhan 430072, Hubei, PR China.
authors.forename: Fei
authors.initials: F
authors.lastname: Niu
authors.affiliation: College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, Hubei, PR China.|Key Laboratory of Biomedical Polymers, Ministry of Education , Wuhan 430072, Hubei, PR China.
authors.forename: Wenzhong
authors.initials: W
authors.lastname: Zhai