Hydrogen-Bond-Induced Microstructural Transition of Ionic Micelles in the Presence of Neutral Naphthols: pH Dependent Morphology and Location of Surface Activity

被引:67
作者
Ali, Moazzam [1 ]
Jha, Mrinmoy [1 ]
Das, Susanta K. [1 ]
Saha, Swapan K. [1 ]
机构
[1] N Bengal Univ, Dept Chem, Darjeeling 734013, India
关键词
VISCOELASTIC WORMLIKE MICELLES; ACID-BASE EQUILIBRIA; SPECTROSCOPIC PROBE; FACILE ROUTE; VESICLES; PHENOL; EVOLUTION; DYNAMICS; FRACTURE;
D O I
10.1021/jp907677x
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The effect of naphthols and methoxynaphthalenes on the microstructure transition of cetyltrimethylammonium bromide (CTA-B) micelles is studied. Although the surface activities of these two types of organic dopants are strong, methoxynaphthalenes failed to promote spherical to worm-like micellar transition and to impart viscoelasticity to the aqueous CTAB solution, presumably due to their inability to form unique H-bonds with interfacial water. The micropolarity of OH sites of micelle-embedded naphthols is measured by observing the pK(a) shift at the micellar surface relative to bulk water. On the basis of spectroscopic and other data, the microstructures formed by both classes of dopants at the micellar surface are predicted. On the basis of hydroxyaromatic dopants, a simple and effective route to design pH-responsive viscoelastic worm-like micelles and the vesicles of single tail cationic surfactant (CTAB) is reported. Results are confirmed by observing cryogenic transmission electron microscopy (cryo-TEM) images.
引用
收藏
页码:15563 / 15571
页数:9
相关论文
共 38 条
[1]   Microstructure evolution in aqueous solutions of cetyl trimethylammonium bromide (CTAB) and phenol derivatives [J].
Agarwal, Vivek ;
Singh, Mohit ;
McPherson, Gary ;
John, Vijay ;
Bose, Arijit .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2006, 281 (1-3) :246-253
[2]   ELECTRONIC SPECTRA AND HYDROGEN BONDING .1. PHENOL AND NAPHTHOLS [J].
BABA, H ;
SUZUKI, S .
JOURNAL OF CHEMICAL PHYSICS, 1961, 35 (03) :1118-&
[3]  
Balasubramanian S, 2002, CURR SCI INDIA, V82, P845
[4]   Study of organized media using time-resolved fluorescence spectroscopy [J].
Bhattacharyya, K .
JOURNAL OF FLUORESCENCE, 2001, 11 (03) :167-176
[5]   Observation of bulk phase separation and coexistence in a sheared micellar solution [J].
Boltenhagen, P ;
Hu, YT ;
Matthys, EF ;
Pine, DJ .
PHYSICAL REVIEW LETTERS, 1997, 79 (12) :2359-2362
[6]   STATICS AND DYNAMICS OF WORM-LIKE SURFACTANT MICELLES [J].
CATES, ME ;
CANDAU, SJ .
JOURNAL OF PHYSICS-CONDENSED MATTER, 1990, 2 (33) :6869-6892
[7]  
CLINT JH, 1992, SURFACTANT AGGREGATI, P147
[8]   Fabrication of low-dimension nanostructures based on organic conjugated molecules [J].
Cui, Shuang ;
Liu, Huibiao ;
Gan, Liangbing ;
Li, Yuliang ;
Zhu, Daoben .
ADVANCED MATERIALS, 2008, 20 (15) :2918-2925
[9]   Self-assembly of surfactant vesicles that transform into viscoelastic wormlike micelles upon heating [J].
Davies, Tanner S. ;
Ketner, Aimee M. ;
Raghavan, Srinivasa R. .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (20) :6669-6675
[10]   Cation-pi interactions in chemistry and biology: A new view of benzene, Phe, Tyr, and Trp [J].
Dougherty, DA .
SCIENCE, 1996, 271 (5246) :163-168