Please wait a minute...
Acta Phys. -Chim. Sin.  2009, Vol. 25 Issue (10): 2020-2025    DOI: 10.3866/PKU.WHXB20091003
Adsorption of Photosensitive Quaternary Ammonium Gemini Surfactant a4-6-m at the Air/Water Interface
SONG Bing-Lei, ZHAO Jian-Xi
Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, P. R. China
Download:   PDF(422KB) Export: BibTeX | EndNote (RIS)      


Three dissymmetric quaternary ammonium Gemini surfactants (referred to as a4-6-m) were synthesized. One of the two hydrophobic chains of a4-6-m was a butyl chain terminated by an azobenzene group and the other was a conventional aliphatic chain of different length (m=12, 14, 16). The results showed that the trans-a4-6-m molecules adsorbed at the air/water interface with a vertical orientation of the two hydrophobic chains. The π-π interaction between azobenzene groups resulted in a denser arrangement of the surfactants. The azobenzene groups toward the air-side in the adsorption layer yielded a higher γcmc (surface tension value corresponding to the critical micelle concentration (cmc)) by comparison to 12-6-12. After UV-light irradiation, the trans-azobenzene groups converted into twisted cis-forms with a large dipole moment. These cis-azobenzene groups lay among the vertically oriented aliphatic chains and their relatively free location enhanced their dipole-dipole interactions, which promoted the tight packing of adsorbed molecules and slightly reduced the minimummolecular occupation area (Amin). The increase in aliphatic chain length led to a reduction of the cmc and the C20 (concentration of surfactant required to reduce 20 mN·m-1 surface tension of water), but had little effect on the γcmc.

Key wordsSurface tension      Dissymmetric photosensitive Gemini surfactant      Terminal azobenzene      Adsorption at air/water interface      trans-cis isomerization     
Received: 26 May 2009      Published: 13 August 2009
MSC2000:  O647  
Corresponding Authors: ZHAO Jian-Xi     E-mail:
Cite this article:

SONG Bing-Lei, ZHAO Jian-Xi. Adsorption of Photosensitive Quaternary Ammonium Gemini Surfactant a4-6-m at the Air/Water Interface. Acta Phys. -Chim. Sin., 2009, 25(10): 2020-2025.

URL:     OR

[1] Jie WEI,Hexin DONG,Xia CHEN,Yuxuan YANG,Dawei FANG,Wei GUAN,Jiazhen YANG. Physicochemical Properties of 1-Methoxyethyl-3-Methylimidazolium Glycine[J]. Acta Phys. -Chim. Sin., 2018, 34(8): 927-932.
[2] Jing TONG,Teng-Fei CHEN,Duo ZHANG,Lin-Fu WANG,Jian TONG,Jia-Zhen YANG. Molar Surface Gibbs Free Energy of the Aqueous Solution of the Ionic Liquid [C2mim][OAc][J]. Acta Phys. -Chim. Sin., 2016, 32(5): 1161-1167.
[3] Xiao-Xue BU,Ben-Han FAN,Jie WEI,Nan-Nan XING,Xiao-Xue MA,Wei GUAN. Thermodynamic Properties and Predicting the Surface Tension of Pyridinium-Based Ionic Liquids of [C6py][DCA] Using a New Eötvös Equation[J]. Acta Phys. -Chim. Sin., 2016, 32(1): 267-273.
[4] LI Chi, YANG Hong-Xu, LIU Ru-Jing, YANG Qi, TONG Jing, YANG Jia-Zhen. Volume and Surface Properties of Aqueous [C5mim][Pro] at 288.15 to 318.15 K[J]. Acta Phys. -Chim. Sin., 2015, 31(1): 11-16.
[5] FAN Hai-Ming, ZHANG Yi-Nuo, ZHANG Jin, WANG Dong-Ying, GAO Jian-Bo, KANG Wan-Li, MENG Xiang-Can, ZHAO Jian, XU Hai. Dynamic Surface Adsorption Properties of Sodium Dodecyl Sulfate Aqueous Solution[J]. Acta Phys. -Chim. Sin., 2013, 29(02): 351-357.
[6] YOU Yi, DENG Yong-Shu, LI Er-Jun, PEI Xiao-Mei, ZHAO Jian-Xi. Hydrophobic Synergism between the Alkyl Tails of Gemini Surfactants during Adsorption and Aggregation[J]. Acta Phys. -Chim. Sin., 2010, 26(08): 2200-2204.
[7] LIU Qing-Shan, YANG Miao, TAN Zhi-Cheng, WELZ-BIERMANN Urs. Estimation and Prediction of the Physicochemical Properties of Imidazolium-Based Ionic Liquids[J]. Acta Phys. -Chim. Sin., 2010, 26(06): 1463-1467.
[8] ZHANG Xiao-Guang, LIU Jie-Xiang, WANG Hai-Ying, WANG Man-Yi, FAN Zhi-Jin. Stability of Avermyctin Emulsion in Water[J]. Acta Phys. -Chim. Sin., 2010, 26(03): 617-625.
[9] YANG Bai-Qin, CHEN Kai, XING Hang, XIAO Jin-Xin. Perfluorobutyl-Based Fluorinated Surfactant with High Surface Activity[J]. Acta Phys. -Chim. Sin., 2009, 25(12): 2409-2412.
[10] ZHANG Qing-Hua, CHEN Bi, ZHAN Xiao-Li, CHEN Feng-Qiu. Synthesis and Solution Properties of PDMS-b-PEO Amphiphilic Diblock Copolymers[J]. Acta Phys. -Chim. Sin., 2009, 25(06): 1075-1080.
[11] YAN Hong, WANG Xiao-Song, ZHU Ru-Zeng. Derivation of the Kelvin Equation[J]. Acta Phys. -Chim. Sin., 2009, 25(04): 640-644.
[12] WANG Luo-Xin; TUO Xin-Lin; XU Jie; LI Song-Nian; WANG Xiao-Gong. Effect of Trans-Cis Isomerization on the Sensitivity of Energetic Azo-Compounds[J]. Acta Phys. -Chim. Sin., 2008, 24(10): 1756-1760.
[13] TU Guo-Yun; WANG Zheng-Wu; WANG Zhong-Ni; LIU Feng; XIAO Jian-Yi. Theoretical Expression and Experiment on Surface Tension in Ideal Binary Mixtures of Surfactants[J]. Acta Phys. -Chim. Sin., 2008, 24(03): 400-404.
[14] TONG Jing; ZHANG Qing-guo; HONG Mei; YANG Jia-zhen. Thermodynamic Properties of Ionic Liquid BMIAlCl4[J]. Acta Phys. -Chim. Sin., 2006, 22(01): 71-75.
[15] XU Hujun; LÜ Chun-xu; LIANG Jin-long. Surfactivity and Micellization of Disodium Hexadecyl Diphenyl Ether Disulfonate in Aqueous Solution[J]. Acta Phys. -Chim. Sin., 2005, 21(11): 1240-1243.