- Fluorescence Properties and Exciplex Formation of Emissive Naphthyridine Derivatives: Application as Sensors for Amines
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Water-soluble donor–acceptor-type fluorophore 15Nap-Cl having two trifluoromethyl groups and a Cl group on a 1,5-aminonaphthyridine framework was prepared. Fluorophore 15Nap-Cl showed strong solvatochromic fluorescence, and, as the solvent polarity increased, a bathochromic shift was observed accompanied by an increase in the fluorescence quantum yield. In addition, in the presence of amines such as ethylamine, diethylamine, and aniline, further considerable bathochromic shifts in the fluorescence were observed. Density functional calculations identified the source of the fluorescence behavior as exciplex formation between 15-Nap-Cl and the corresponding amine. The fluorescence behavior was exploited to fabricate a sensor that can identify various primary, secondary, and tertiary amines.
- Hirota, Junko,Usui, Kazuteru,Fuchi, Yasufumi,Sakuma, Masaomi,Matsumoto, Shota,Hagihara, Ryusuke,Karasawa, Satoru
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p. 14943 - 14952
(2019/11/13)
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- Thermal Decompositions of Dinitropyridyl and Dinitrothienyl Dithiocarbamates and t-Butyl Trithiocarbonates
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The title compounds on heating cyclized to yield 7-nitro-1,3-dithiolopyridin-2-one (III), 6-nitro-1,3-dithiolopyridin-2-one (VIIa), 6-nitrothieno-1,3-dithiol-2-one (XIVa) and 6-nitrothieno-1,3-dithiole-2-thione (XIVb).
- Rasheed, Khalid,Warkentin, James D.
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p. 1581 - 1585
(2007/10/02)
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- 2,4-Diaryl[1,3,4H]thiadiazines fused to quinoxalines
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Compounds are provided which have the formula: STR1 WHERE Ar1 and Ar2 are aromatic radicals and X and Y are 1 to 2 nitrogen atoms and conversely 3 to 2 carbon atoms which may have selected substitutes. Preferably, 2 adjacent carbon atoms (usually the 2 Y's) have a butadienyl or a substituted butadienyl attached thereto. The compounds are useful as dyes.
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