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A kind of functional luminescent small molecule probe (RCAIM) was designed and synthesized by using rhodamine B hydrazide as the fluorophore and cyanuric chloride and isophorone as raw materials to modify the main fluorophore. The probe could specifically recognize Cu2+ in ethanol and aqueous solution (v/v=95∶5). When the probe was binded with Cu2+ to form a complex, the color of the solution changed from yellow to red. The results showed that the probe formed a complex with Cu2+ in the form of 1:2 when Cu2+ is added to the probe solution, and the complex showed strong specific absorption at the wavelength of 555 nm. Meanwhile, the study showed that the probe had good specificity, selectivity and anti-interference ability for Cu2+ detection. At the same time, the detection limit of Cu2+ by the probe was 0.9×10-6 mol/L, indicating it had high sensitivity. And the probe could also be used to detect Cu2+ in lake water and tap water samples with high accuracy and reliability. The probe was also prepared into a portable test strip to detect Cu2+ conveniently and quickly. [ABSTRACT FROM AUTHOR]

Using Rhodamine B hydrazide as the fluoroph ore, a fluorescent probe with disulfide bond, RNSS, is designed and synthesized, which can specifically recognize in acetonitrile and aqueous solution (v/v = 1 :1) glutathione (GSH). The structure characterization and performance of the probe are analyzed by infrared spectroscopy, nuclear magnetic resonance spectroscopy, and fluorescence spectroscopy. The experimental results show that when GSH is added to the probe solution, under the excitation of 561 nm light, it has obvious pink fluorescence at 585 nm, and other amino acids have no fluorescence response, indicating that it has good specific selectivity and anti--interference ability. At the same time, the detection limit of the probe for GSH is 6.063 X 1 ()_b mol/L, which indicates that it has high sensitivity. The fluorescence spectrum titration curve and Job-plot analysis show that the two are replaced by disulfide bond reaction 1 :1 method to form complexes. [ABSTRACT FROM AUTHOR]