Role of C-F bonding on the optical properties of fluorinated graphene oxide

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F24%3A00588305" target="_blank" >RIV/61389013:_____/24:00588305 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acs.jpcc.4c03031" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.jpcc.4c03031</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.4c03031" target="_blank" >10.1021/acs.jpcc.4c03031</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Role of C-F bonding on the optical properties of fluorinated graphene oxide

Popis výsledku v původním jazyce

Graphene oxide (GO) exhibits very poor photoluminescence (PL) characteristics because of the nonradiative recombination of electron–hole pairs. One of the crucial approaches for the enhancement of the optical features of GO is functionalization. In this study, we present a novel catalyst-free, rapid, one-step, aqueous-phase synthetic approach using SELECTFLUOR under mild conditions that provide access to highly photoluminescent fluorinated graphene oxide (FGO) emitting in the visible region. Time-resolved fluorescence spectroscopy and femtosecond transient absorption spectroscopy revealed that the enhanced PL is due to the increased π* → π transition and weaker electron–phonon interactions in FGO. Most importantly, the structure and composition analyses using 19F NMR and X-ray photoelectron spectroscopy suggest that the C–F bond on the basal plane neighboring to the aromatic rings is the key factor behind the enhancement of the fluorescence of FGO. Identification of the underlying C–F bonding features behind the emergence of strong orange fluorescence will contribute immensely to the fundamental understanding of the structure and optical property relationship of FGO. Moreover, strong orange fluorescence remains stable in a solid thin film of FGO, which offers a unique solution-processable route toward the integration of FGO in solid-state optoelectronic devices.

Název v anglickém jazyce

Role of C-F bonding on the optical properties of fluorinated graphene oxide

Popis výsledku anglicky

Graphene oxide (GO) exhibits very poor photoluminescence (PL) characteristics because of the nonradiative recombination of electron–hole pairs. One of the crucial approaches for the enhancement of the optical features of GO is functionalization. In this study, we present a novel catalyst-free, rapid, one-step, aqueous-phase synthetic approach using SELECTFLUOR under mild conditions that provide access to highly photoluminescent fluorinated graphene oxide (FGO) emitting in the visible region. Time-resolved fluorescence spectroscopy and femtosecond transient absorption spectroscopy revealed that the enhanced PL is due to the increased π* → π transition and weaker electron–phonon interactions in FGO. Most importantly, the structure and composition analyses using 19F NMR and X-ray photoelectron spectroscopy suggest that the C–F bond on the basal plane neighboring to the aromatic rings is the key factor behind the enhancement of the fluorescence of FGO. Identification of the underlying C–F bonding features behind the emergence of strong orange fluorescence will contribute immensely to the fundamental understanding of the structure and optical property relationship of FGO. Moreover, strong orange fluorescence remains stable in a solid thin film of FGO, which offers a unique solution-processable route toward the integration of FGO in solid-state optoelectronic devices.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

1932-7455

Svazek periodika

128

Číslo periodika v rámci svazku

29

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

12259-12266

Kód UT WoS článku

001277958300001

EID výsledku v databázi Scopus

2-s2.0-85198555527