Inclusion complex formation between

Host-Guest Inclusion Complex Formation between Surfactant Stilbenes and Amylose... 

Surfactants were found to induce phosphorescence from 1-bromonaphthalene in aerated aqueous solutions of (3-CD [22], In the case of the 1 1 inclusion-complex formation between 7-cyclodextrin and acenaphthene in aqueous solution, bromoalcohols such as 2,3-dibromopropane-l-ol or 2-bromoethanol induced a decrease of the fluorescence and an enhancement of room-temperature phosphorescence of acenaphthene [23],... 

The first report on a CD inclusion polymer forming hydrogels dates back to 1994, which describes the discovery of the sol-gel transition during the inclusion complex formation between a-CD and high molecular weight PEO in aqueous solution [59]. The gelation was induced by the partially formed a-CD-PEO inclusion complexes, which self-assembled into water-insoluble domains acting as a kind of... 

The inclusion complex formation between PEO blocks of the Pluronic copolymers and a-CD in the hydrogels was confirmed with wide-angle X-ray diffraction studies of the hydrogels [68], The effect of a-CD to aid the gelation of... 

Reduction of ninhydrin by (28) (Table 6) is much faster than that by dihydronicotinamide. This difference is also attributable to inclusion complex formation between ninhydrin and the cyclodextrin moiety of (28) [34]. 

One of the interesting questions of CyD chemistry is whether inclusion complex-ation represents a prerequisite for chiral recognition and, if not, which part of the CyD, external or internal, provides a more favorable environment for enantioselec-tive recognition The synthesis of highly crowded heptakis-(2-0-methyl-3,6-di-0-sulfo)-j8-CyD (HMdiSu-jg-CyD) with 14 bulky sulfate substituents on both primary and secondary CyD rims can provide insights to this problem [62] since the bulky substituents on both sides of the cavity entrance may hinder inclusion complex formation between chiral analytes and HMdiSu-yS-CyD. In one study, 27 cationic chiral analytes were resolved in CE using native f-CyD and HMdiSu-yS-CyD [63]. For 12 of 16 chiral analytes resolved with both chiral selectors the enantiomer migration order was opposite. Analysis of the structures of analyte-CyD complexes in solution indicated that in contrast to mainly inclusion-type complexation between chiral analytes and j8-CyD, external complexes are formed between the chiral analytes and HMdiSu-j8-CyD [63]. 

Thus, inclusion complex formation between CyDs and their chiral guests does not seem to be a prerequisite for chiral recognition. CyDs are able to form quite strong external complexes enantioselectively with some chiral guest molecules. However, chiral recognition in the inclusion type complex, at least in this particular case, appears to be somewhat superior [63],... 

Tab. 13.2. Studies of inclusion complex formation between pure LR-CyD or mixture of LR-CyDs and compounds.

Up to now, NMR spectroscopy has become the most powerful approach for the study of inclusion complex formation between CDs and a variety of guest molecules, from initial H NMR in solution to C NMR, N NMR, NMR and... 

B. (2008) Novel biodegradable shape memory material based on partial inclusion complex formation between a-cyclodextrin and poly (e-caprolactone). Biomacromolecules, 9 (10), 2573-2577. 

The inclusion complex formation between frans-resvera-trol and P-CD was investigated using a Cjg column as stationary phase and methanol-water mixtures as mobile phases. The apparent formation constants were calculated under different chromatographic conditions. The... 

Figure 27 Inclusion complex formation between hosts (51,59) and indicators (60,61) and fluorescence response upon association. (Reproduced from Ref. 60. Nature Publishing Group, 2007.)...

Kida T, Minabe T, Nakano S, Akashi M (2008) Fabrication of novel multilayered thin films based on inclusion complex formation between amylose derivatives and guest polymers. Langmuir... 

Lignin-related polymers were synthesised. Coniferyl alcohol (4-hydroxy-3-methoxycinnamyl alcohol, CoA), a phenolic lignin monomer (monolignol) contained in plant cell walls, was polymerised in the presence of a-cyclodextrin (a-CD) in a HRP/H2O2 system. The presence of a-CD led to the product polymer containing 8-0-4 -richer linkages, compared with the no-additive case. This is probably due to the inclusion complex formation between CoA and a-CD, which suppresses other linkages such as 8-5 and 8-8, due to the steric hindrance of the complex [179]. 

P-CD, respectively (Nacsa et al., 2008, 2009 Zhao et al., 2003 Pedersen et al., 2005). In the LOR/ P-CD mixture, four new peaks at 1675,1478,1440 and 1236 cm-i were clearly observed after grinding for 15 min. The appearance of these new IR peaks might be due to the inclusion complex formation between LOR and p-CD. Once P-CD was replaced by HP-P-CD, however, the changes in FTIR spectra for LOR/HP-P-CD ground mixture were more pronounced. 

The inclusion complex formations between the cyclodextrins and the mandelic acid enantiomers were evaluated. The effects of various factors such as the composition of the mobile phase, concentration of cyclodextrins and the column temperature on the retention and the enantioselectivity were studied. 

---