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dc.contributor.advisorMohammed, Omar F.
dc.contributor.authorAlturki, Abdullah
dc.date.accessioned2019-02-11T06:15:57Z
dc.date.available2020-02-08T00:00:00Z
dc.date.issued2019-01
dc.identifier.citationAlturki, A. (2019). Tunable Twisting Motion of Organic Linkers via Concentration and Hydrogen-bond Formation. KAUST Research Repository. https://doi.org/10.25781/KAUST-N9RP1
dc.identifier.doi10.25781/KAUST-N9RP1
dc.identifier.urihttp://hdl.handle.net/10754/631025
dc.description.abstractBenzothiazole dibenzoic acid derivative (BTDB) is well-known organic linkers utilized for the syntheses of various metal organic frameworks, and demonstrates interesting photophysical properties upon concentration variations in solution. The presence of two carboxylic acid functional groups at each side of the rod-like molecule, facilitates dimerization and oligomerization equilibria. Interestingly, dimers and oligomers have completely different emission behaviors from the monomer of the same species. At a low range of concentration, 0.1 – 64 μM, dimerization process is dominant, and that the equilibrium constant of dimer formation found to be 18,000 M-1. On the other hand, in the 64 – 1000 μM concentration range, oligomerization takes over, and that it results in the formation of a small linear chain of 8 molecules, or 4 dimers, with a high equilibrium constant of 1.2 × 1013 M-3. Various experimental measurements and theoretical calculations have suggested hydrogen-bond formation is the main driving force for the dimerization and oligomerization in the nano- and micro- molar regime, and that structure rigidity of a species is a key factor in controlling its photophysical properties, such as emission quantum yield and excited state lifetime.
dc.language.isoen
dc.subjectBenzothiazolo
dc.subjectTorsional Motion
dc.subjectTwisting Motion
dc.subjectEmission Enhancment
dc.subjectDimerization
dc.subjectOligomerization
dc.titleTunable Twisting Motion of Organic Linkers via Concentration and Hydrogen-bond Formation
dc.typeThesis
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.rights.embargodate2020-02-08
thesis.degree.grantorKing Abdullah University of Science and Technology
dc.contributor.committeememberHuang, Kuo-Wei
dc.contributor.committeememberBakr, Osman
thesis.degree.disciplineChemical Science
thesis.degree.nameMaster of Science
dc.rights.accessrightsAt the time of archiving, the student author of this thesis opted to temporarily restrict access to it. The full text of this thesis became available to the public after the expiration of the embargo on 2020-02-08.
refterms.dateFOA2019-02-11T06:15:58Z
kaust.request.doiyes


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