start-ver=1.4
cd-journal=joma
no-vol=54
cd-vols=
no-issue=5
article-no=
start-page=upaf091
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2025
dt-pub=202505
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Highly emissive and robust diarylethene fluorophore incorporating imide-fused phenanthryl moieties
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The fluorescence properties and photostabilities of (E)-diarylethenes (DPEs), featuring two 3-phenanthryl moieties, were investigated. Pristine (E)-di-1,2-(3-phenanthryl)ethene and its ester derivative, respectively referred to as DPE-H and DPE-E, exhibited blue fluorescence. However, they underwent a two-step photoreaction sequence that yielded [7]helicenes, resulting in a gradual reduction of the fluorescence intensity. In contrast, the imide-fused derivative DPE-I displayed intense green fluorescence and it was unexpectedly photostable in solution, maintaining its highly efficient fluorescent nature even after prolonged light exposure. DPE-I, thus, provides a new type of highly efficient and robust diarylethene fluorophore.
en-copyright=
kn-copyright=

en-aut-name=NoseKeito
en-aut-sei=Nose
en-aut-mei=Keito
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=YamajiMinoru
en-aut-sei=Yamaji
en-aut-mei=Minoru
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=MoriTadashi
en-aut-sei=Mori
en-aut-mei=Tadashi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=TaniFumito
en-aut-sei=Tani
en-aut-mei=Fumito
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=GotoKenta
en-aut-sei=Goto
en-aut-mei=Kenta
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

en-aut-name=OkamotoHideki
en-aut-sei=Okamoto
en-aut-mei=Hideki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=

affil-num=1
en-affil=Department of Chemistry, Graduate School of Environmental, Life, Natural Science and Technology, Okayama University
kn-affil=

affil-num=2
en-affil=Program of Applied Chemistry, Cluster of Materials and Environment, Gunma University
kn-affil=

affil-num=3
en-affil=Research Center for Environmental Preservation and Graduate School of Engineering, The University of Osaka
kn-affil=

affil-num=4
en-affil=Institute for Materials Chemistry and Engineering, Kyushu University
kn-affil=

affil-num=5
en-affil=Institute for Materials Chemistry and Engineering, Kyushu University
kn-affil=

affil-num=6
en-affil=Department of Chemistry, Graduate School of Environmental, Life, Natural Science and Technology, Okayama University
kn-affil=
en-keyword=diarylethene
kn-keyword=diarylethene
en-keyword=fluorescence
kn-keyword=fluorescence
en-keyword=phenanthreneimide
kn-keyword=phenanthreneimide
END