Title:
Studies on Inclusion Complexes of Cyclodextrin and Dyes; I.Synthesis and Properties of Dye Rotaxanes, II. Formation of Anisotropic Supremolecules

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dc.contributor.advisor Srinivasarao, Mohan
dc.contributor.advisor Bunz, Uwe H. F.
dc.contributor.author Park, Jong Seung en_US
dc.contributor.committeeMember Beckham, Haskell
dc.contributor.committeeMember Griffin, Anselm
dc.contributor.committeeMember Park, Jung
dc.contributor.committeeMember Tolbert, Laren
dc.contributor.department Textile and Fiber Engineering en_US
dc.date.accessioned 2006-01-18T22:15:01Z
dc.date.available 2006-01-18T22:15:01Z
dc.date.issued 2005-08-26 en_US
dc.description.abstract Supramolecular chemistry covers intermolecular interactions where non-covalent bonds are involved, and many of them are based on host-guest interactions. Cyclodextrins (CDs) are cyclic oligosaccharides consisting of 6-, 7- or 8-glucose units, which are called alpha-, beta- or gamma-CDs, respectively. They have hydrophobic interior and hydrophilic exterior, and are widely being used as hosts for various organic molecules. The formation of CD inclusion complexes with a variety of dyes has continuously drawn our interests, since CDs are readily available and have ability to include dye molecules altering their properties. The present thesis covers the study of inclusion complexes of CDs and chromophore dyes, largely in two ways; rotaxane and pseudorotaxane. The stable rotaxane structure is achieved with the synthesis of dye rotaxane. The introduction of CD ring around azo chromophore provides a simple way to improve the solubility and stability of azo dye. We have shown that by incorporating proper compounds as a coupler, azo dye rotaxanes can be used as pH indicators and metal ion sensors. We have described the synthesis of novel acetylene dye rotaxane using the Pd-catalyzed reaction of Heck-Cassar-Sonogashira-Hagihara type. Its fluorescence properties in the solid state as well as in solutions are examined and compared with those of free dye. Free dye, which has tetra-carboxylic groups, is found to be highly sensitive to various metal ions, exhibiting high Stern-Volmer constants, K(SV). On the contrary, acetylene dye rotaxane exhibits much less quenching against various quenchers. The appearance of fluorescent anisotropic structure has been observed by the formation of inclusion complex between acetylene dye and gamma-CD. Its structural nature is studied by various techniques, including fluorescence, fluorescence anisotropy, wide angle X-ray scattering (WAXD) and differential scanning calorimetry (DSC) measurements. Methyl orange, an acid azo dye, forms a dimeric inclusion complex with gamma-CD, resulting in the formation stable anisotropic aggregates. Several other azo dyes are found to form anisotropic supramolecule in the presence of gamma-CD, and their structural characteristic has been discussed in terms of the number and position of solubilizing groups. en_US
dc.description.degree Ph.D. en_US
dc.format.extent 3820608 bytes
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/7482
dc.language.iso en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Sensors en_US
dc.subject Anisotropy
dc.subject Supramolecule
dc.subject Rotaxanes
dc.subject Dye
dc.subject Cyclodextrin
dc.subject.lcsh Rotaxanes Synthesis en_US
dc.subject.lcsh Supramolecular chemistry en_US
dc.subject.lcsh Cyclodextrins en_US
dc.subject.lcsh Dyes and dyeing en_US
dc.subject.lcsh Rotaxanes Analysis en_US
dc.title Studies on Inclusion Complexes of Cyclodextrin and Dyes; I.Synthesis and Properties of Dye Rotaxanes, II. Formation of Anisotropic Supremolecules en_US
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.advisor Srinivasarao, Mohan
local.contributor.corporatename School of Materials Science and Engineering
local.contributor.corporatename College of Engineering
relation.isAdvisorOfPublication 94a03a29-71ee-41d5-8271-e05e6ed83847
relation.isOrgUnitOfPublication 21b5a45b-0b8a-4b69-a36b-6556f8426a35
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
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