Beta-cyclodextrin Molecular Assemblies Nature

*æ…½~: P ~ 3 Abstract 1 The effect of 13-CD on the systems of SDS micelle and microemulsion The solubility of 13-CD is greater in the systems of SDS micelle and microemulsion than in water. When the concentration of 13-CD is lower, the distribution of 13-CD in the micellar phase will increase and the diffusion coefficient D and the aggregation number N will decrease with 13-CD added. However, when the concentration of 13-CD is higher, the distribution of f3-CD in the continuous water phase will increase and the influence of 13-CD on D and N will reduce more remarkably. The first and second cmc of SDS rnicelle increase linearly with 13-CD. The inclusion complex of 13-CD with SDS monomer in the molecular ratio of 1:1 can be formed when the SDS concentration is less than the first cmc. Mixed spherical micelle will be formed in the molecular ratio of 1:8 for (3-CDISDS when the SDS concentration is higher than the first cmc. Surface tension measurements indicat that not only 13-CD but also the complex of 13-CD with SDS is surface nonactive. With the 13-CD concentration increased, the first cmc of SDSIn-C5H110H/H,O system also increases. The adding of 13-CD will reduce the diffusion coefficient D and the aggregation number N of the microemulsion of SDS/n- C5H110H(H20 system. 2 The effect of 13-CD on the systems of CTAB micelle and microemulsion The solubility of 13-CD is greater in the systems of CTAB micelle and microemulsion than in water. The first and second cmc of CTAB micelle increase linearly with 13-CD. When the CTAB concentration is less than the first cmc, the inclusion complex (1:1) of 13-CD with CTAB monomer is formed. Mixed spherical micelle will be formed in the molecular ratio of 1:10 for 13-CD/CTAB when the CTAB concentration is higher than 4 the first cmc. The complex of (3-CD with CTAB is surface nonactive. With J3-CD increased, the first cmc of CATB/n-C5H, 10H/H20 system also increases, and the adding of (3-CD will increase the diffusion coefficient D and reduce the aggregation number N of the microernulsion of CTAB /n-C5H11 OH/H20 system. 3 The effect of (3-CD on the systems of Triton X- 100 rnicelle and microemulsion The solubility of (3-CD is greater in the systems of Triton X-100 niicelle and I microcmulsion than in water. The first and second cmc of Triton X-l00 micelle increase linearly with increase of (3-CD. When the Triton X-100 concentration is less than the first cmc, the inclusion complex (1:1) of (3-CD with Triton X-l0O monomer will be formed. Mixed spherical micelle will be formed in the molecular ratio of 1:7 for (3-CD/ Triton X-100 when the Triton X-100 concentration is higher than the first cmc. The complex of u-CD with Triton X-100 is surface nonactive. The first cmc of Triton X- l0O/n-C5H110H/H20 system also increases with the (3-CD concentration increased, and the added (3-CD will reduce the aggregation number N of the microemulsion of Triton X-lOO /n-C5H110H1H20 system.