Bolaform surfactant

Beside the conventional surfactants with one polar head group and one nonpolar tail, dimeric and oligomeric surfactants have attracted considerable interest in academia and industry [521], Dimeric surfactants, also called Gemini surfactants, are made up of two amphiphilic moieties connected closely to the head group by a spacer group (Fig. 12.1). In bolaform surfactants the connection is in the middle of the alkyl chain or close to the end, so that they can be considered as two polar head groups connected by a long hydrophobic chain. 

Matsumura, H. Kuwamura, T. Furusawa, K., (1990) Coagulation behavior of vesicles composed of crown ethers and phospholipids caused by bolaform surfactants J. Colloid Interface Sci. 139, 331-336. 

D.Y. Zhao, Q.S. Huo, J.L. Feng, J.M. Kim, Y.J. Han, and G.D. Stucky, Novel Mesoporous Silicates with Two-dimensional Mesostructure Direction using Rigid Bolaform Surfactants. Chem. Mater., 1999, 11, 2668-2672. 

Hubbard, F.P., Santonicola, G., Kaler, E.W. and Abbott, N.L. (2005) Small-angle neutron scattering from mixtures of sodium dodecyl sulfate and a cationic, bolaform surfactant containing azobenzene. Langmuir, 21, 6131-6136. 

In work, two dimeric pyrimidinic surfactants (DPS), acyclic analogues of APM-1 were synthesized a gemini surfactant DPS-1, and a typical bolaform surfactant DPS-2 (Scheme 15.2). The catalytic effect of the single surfactant solutions and their mixtures... 

Davey, T. W., W. A. Ducker, and A. R. Hayman. 2000. Aggregation of (o-Hydroxy Quaternary Ammonium Bolaform Surfactants. Langmuir 16,2430-2435. 

Throughout this chapter the A block is supposed to be solvophihc (hydrophihc) and the B block solvophobic (hydrophobic). The A and B blocks are also referred to as soluble and insoluble blocks, respectively. Diblock copol3miers A Bn are the eqcuvalent of conventional scufactants with one alJ l chain and one head group. Triblock copol3rmersBNg An BN are the equivalent oigemini (dimeric) scufactants triblock copolymers An Bn An the equivalent of bolaform surfactants, and mcdti-... 

Zhao, D., Huo, Q., Feng, J., Kim, J Han, Y., and Stucky, G.D. (1999) Novel mesoporous silicates with two-dimensional mesostructure direction using rigid bolaform surfactants. Chem. Mater., 11, 2668-2672. 

Bunton, C.A., Dorwin, E.L., Savelli, G., Si, V.C. Hydrolysis of 2,4-dinitrophenyl phosphate catalyzed by single-chain, twin-tailed and bolaform surfactants. Reel. Trav. Chim. Pays-Bas 1990,109(2), 64-69. 

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