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Oligo(p-Phenylenevinylene) Derived Organogels: A Novel Class of Functional Supramolecular Materials
| Content Provider | CUSAT-Thesis |
|---|---|
| Advisor | Dr. Ajayaghosh, A |
| Researcher | Subi Jacob, George |
| Abstract | The main objective of thepresent study is to have a detailed investigation on the gelation properties,morphology and optical properties of small π-conjugated oligomers. For this purposewe have chosen oligo(p-phenylenevinylene)s (OPVs), a class of molecules whichhave received considerable attention due to their unique optical and electronicproperties. Though a large number of reports are available in the literature on the self-assembly properties of tailor made OPVs, none of them pertain to the design ofnanostructures based on organogels. In view of this, we aimed at the creation offunctional chromophoric assemblies of π-conjugated OPVs through the formation oforganogels, with the objective of crafting nanoscopic assemblies of different size andshape thereby modulating their optical and electronic properties.In order to fulfill the above objectives, the design and synthesis of a variety ofOPVs with appropriate structural variations were planned. The design principleinvolves the derivatization of OPVs with weak H-bonding hydroxymethyl end groupsand with long aliphatic hydrocarbon side chains. The noncovalent interactions in thesemolecules were expected to lead the formation of supramolecular assembly and gels inhydrocarbon solvents. In such an event, detailed study of gelation and extensiveanalysis of the morphology of the gel structures were planned using advancedmicroscopic techniques. Since OPVs are strongly fluorescent molecules, gelation isexpected to perturb the optical properties. Therefore, detailed study on the gelationinduced optical properties as a way to probe the nature and stability of the selfassemblywas planned. Apart from this, the potential use of the modulation of theoptical properties for the purpose of light harvesting was aimed. The approach to thisproblem was to entrap an appropriate energy trap to the OPV gel matrix which maylead to the efficient energy transfer from the OPV gel based donor to the entrappedacceptor. The final question that we wanted to address in this investigation was thecreation of helical nanostructures through proper modification of the OPV backboneWith chiral handles.The present thesis is a detailed and systematic approach to therealization of the above objectives which are presented in different chapters of thethesis. |
| File Format | |
| Language | English |
| Publisher Institution | Regional Research Laboratory (CSIR) |
| Access Restriction | Open |
| Subject Keyword | oligo(p-phenylenevinylene) Supramolecular Materials Organogels π-conjugated oligomers crafting gelation helical nanostructures Chemistry |
| Content Type | Text |
| Educational Degree | Doctor of Philosophy (Ph.D.) |
| Resource Type | Thesis |
