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Mingjun Chen,Xueke Bai,Zhenping Qi,Shoubo Xiang,Hua Zuo,최경민,신동수 대한화학회 2019 Bulletin of the Korean Chemical Society Vol.40 No.8
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 1.83. The color variation along the pH changes proved that the probe L can be used as a low-cost optical sensor for the naked eye detection of proton in the present buffer.