start-ver=1.4 cd-journal=joma no-vol=60 cd-vols= no-issue=43 article-no= start-page=151189 end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2019 dt-pub=20190920 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Fluorescence properties of amido-substituted 2,3-naphthalimides: Excited-state intramolecular proton transfer (ESIPT) fluorescence and responses to Ca2+ ions en-subtitle= kn-subtitle= en-abstract= kn-abstract= 2,3-Naphthalimide derivatives incorporating trifluoroacetamido (3a) and methansulfonamido (3b) functionalities at the 1-position were prepared and their intramolecular excited state proton transfer (ESIPT) fluorescence and responses to metal ions were investigated. Compound 3a displayed normal fluorescence in the amide form in toluene and MeCN and no response to metal cations in the corresponding amidate ion form. In contrast, compound 3b gave off dual emission assignable to normal and ESIPT fluorescence. Additionally, the amidate form of compound 3b displayed off-on fluorescence response to Ca2+. en-copyright= kn-copyright= en-aut-name=WangLei en-aut-sei=Wang en-aut-mei=Lei kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=FujiiMayu en-aut-sei=Fujii en-aut-mei=Mayu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=NambaMisa en-aut-sei=Namba en-aut-mei=Misa kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 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=4 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=5 ORCID= affil-num=1 en-affil=Division of Earth, Life, and Molecular Sciences, Graduate School of Natural Science and Technology, Okayama University kn-affil= affil-num=2 en-affil=Division of Earth, Life, and Molecular Sciences, Graduate School of Natural Science and Technology, Okayama University kn-affil= affil-num=3 en-affil=Division of Earth, Life, and Molecular Sciences, Graduate School of Natural Science and Technology, Okayama University kn-affil= affil-num=4 en-affil=Division of Molecular Science, Graduate School of Science and Engineering, Gunma University kn-affil= affil-num=5 en-affil=Division of Earth, Life, and Molecular Sciences, Graduate School of Natural Science and Technology, Okayama University kn-affil= en-keyword=Fluorescence kn-keyword=Fluorescence en-keyword=ESIPT kn-keyword=ESIPT en-keyword=Naphthalimide kn-keyword=Naphthalimide en-keyword=Ca2+ probe kn-keyword=Ca2+ probe END