Exploring Charge Transfer Mechanisms in Schiff Base-Modified N-Doped GQDs: Insights from DFT and Pump-Probe Spectroscopy for Bioimaging Applications

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dc.authoridKARATAY, Ahmet/0000-0001-9373-801X
dc.contributor.authorHance, Saadet
dc.contributor.authorErdener, Digdem
dc.contributor.authorOzturk, Berfin Ilayda
dc.contributor.authorYildiz, Elif Akhuseyin
dc.contributor.authorKaratay, Ahmet
dc.contributor.authorBoyacioglu, Bahadir
dc.contributor.authorUnver, Huseyin
dc.date.accessioned2025-01-27T20:34:38Z
dc.date.available2025-01-27T20:34:38Z
dc.date.issued2024
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractIn recent developments, graphene quantum dots (GQDs) have emerged as valuable tools for imaging and biosensing. Various modifications on the GQDs with any desired functionality and attachment of organic molecules and/or nanostructures allow tuning their photophysical properties as well as charge transfer dynamics for bioimaging applications. This study focuses on synthesizing and characterizing of polyethyleneimine-functionalized nitrogen-doped GQDs (NC1), Schiff base- functionalized nitrogen-doped GQDs (NC2), and silver nanocomposites of these Schiff base-functionalized nitrogen-doped GQDs (NC3). We explore their absorption and emission properties to understand their interactions in the ground state. Furthermore, ultrafast transient absorption spectroscopy measurements reveal that the presence of NC3 shortens the excited state lifetime of NC1 due to charge transfer, resulting in reduced fluorescence intensity. Both experimental and DFT results suggest the potential of NC3 for bioimaging and sensing applications, making them promising candidates for phototheranostic purposes.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK); TUBITAK; [122F211]
dc.description.sponsorshipThis study was supported by Scientific and Technological Research Council of Turkey (TUBITAK) under the Grant Number 122F211 The authors thank to TUBITAK for their supports. The numerical calculations reported in this paper were fully performed at TUBITAK ULAKBIM, High Performance and Grid Computing Center (TRUBA resources).
dc.identifier.doi10.1002/slct.202403920
dc.identifier.issn2365-6549
dc.identifier.issue41
dc.identifier.scopus2-s2.0-85208024822
dc.identifier.scopusqualityQ3
dc.identifier.urihttps://doi.org/10.1002/slct.202403920
dc.identifier.urihttps://hdl.handle.net/20.500.12428/23396
dc.identifier.volume9
dc.identifier.wosWOS:001353357200001
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherWiley-V C H Verlag Gmbh
dc.relation.ispartofChemistryselect
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectN-doped GQDs
dc.subjectSchiff base
dc.subjectCharge transfer mechanisms
dc.subjectPump-probe spectroscopy
dc.subjectBioimaging, DFT
dc.titleExploring Charge Transfer Mechanisms in Schiff Base-Modified N-Doped GQDs: Insights from DFT and Pump-Probe Spectroscopy for Bioimaging Applications
dc.typeArticle

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