Fluorescent macromolecular perylene diimides containing pyrene or indole units in bay positions

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dc.contributor.authorDinçalp H.
dc.contributor.authorKizilok S.
dc.contributor.authorIçli S.
dc.date.accessioned2024-07-22T08:21:04Z
dc.date.available2024-07-22T08:21:04Z
dc.date.issued2010
dc.description.abstractNovel, symmetric and unsymmetric perylene diimide dyes with pyrene or indole units in the bay positions of the perylene ring were synthesized and characterized using FT-IR, 1H and 13C NMR, MS, UV-Vis spectra and cyclic voltammetry. The λmax in different solvents were in the range 526-585 nm and emission wavelengths of the dyes exhibited positive solvatochromism with increasing solvent polarity. Long wavelength emissions >750 nm of dyes with pyrene units displayed charge-separated state of perylene-pyrene system. Dyes with pyrene or indole units showed greater photostability in toluene than dyes which did not contain these bulky substituents. Incorporating electron-donating indole substituents lowered the band gap energies and, therefore, the HOMO energy levels were increased. The energy density and shape of the molecular orbitals were calculated theoretically. © 2009 Elsevier Ltd. All rights reserved.
dc.identifier.DOI-ID10.1016/j.dyepig.2009.11.005
dc.identifier.issn01437208
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/18457
dc.language.isoEnglish
dc.subjectCharge transfer
dc.subjectChemical bonds
dc.subjectCyclic voltammetry
dc.subjectEnergy gap
dc.subjectIon exchange
dc.subjectLiquid crystal polymers
dc.subjectMass transfer
dc.subjectMolecular orbitals
dc.subjectSolar cells
dc.subjectSolvents
dc.subjectSulfur compounds
dc.subjectToluene
dc.subjectBand gap energy
dc.subjectBulky substituents
dc.subjectCharge-separated state
dc.subjectDifferent solvents
dc.subjectElectron-donating
dc.subjectEmission wavelength
dc.subjectEnergy density
dc.subjectHOMO energy levels
dc.subjectHOMO-LUMO energies
dc.subjectHOMO-LUMO energy levels
dc.subjectIndole units
dc.subjectLong-wavelength emissions
dc.subjectPerylene rings
dc.subjectPerylenediimides
dc.subjectPerylenes
dc.subjectPhoto-stability
dc.subjectPositive solvatochromism
dc.subjectSolvatochromisms
dc.subjectSolvent polarity
dc.subjectUV-vis spectra
dc.subjectchemical process
dc.subjectdye
dc.subjectfluorescence
dc.subjecthydrocarbon
dc.subjectsolvent
dc.subjectsynthesis
dc.subjectElectron transitions
dc.titleFluorescent macromolecular perylene diimides containing pyrene or indole units in bay positions
dc.typeArticle

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