2019
DOI: 10.1002/bkcs.11819
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Novel Rhodamine B and 2H‐benzo[b][1,4]oxazin‐3(4H)‐one‐derived Fluorescent Sensor for Low pH Value Detection

Abstract: A new fluorescent probe L fusing the rhodamine B scaffold with 2H-benzo[b][1,4]oxazin-3(4H)-one moiety has been developed and applied as an acidic pH sensor. The ultraviolet (UV) and fluorescence spectra of the probe at different pH values were investigated in B-R buffer/MeOH (v: v = 3: 7). This probe showed increase of both the UV-Vis absorption and fluorescence emission from alkaline/neutral to acidic condition, reaching a strongest intensity at pH 2.13, but the intensities decreased when the pH decreased to… Show more

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