A new “off–on” fluorescent probe for Al3+ in aqueous solution based on rhodamine B and its application to bioimaging

Development of Acridine‐Derived “Turn On” Al3+ Fluorescent Sensors and Their Imaging in Living Cells

“…of Al 3+ (Figure S3). The limit of detection (LOD) was caculated based on the IUPAC definition (LOD=3Q/S), where Q stands for the standard deviation of the blank samples, and S is the slope of the calibration curve line . The detection limit (LOD) of the method based on the fluorescence titration thus calculated to be 0.224 μM (Figure ) and 0.405 μM (Figure S4) for L‐1 and L‐2 , respectively, which were all below the maximum permissive level of Al 3+ in drinking water (1.85 μM) set by China EPA standard .…”

“Turn-On” Fluorescent Biosensors for High Selective and Sensitive Detection of Al3+ Ion

“…Fluorescence sensors have generated extensive research in the past few decades, due to their simple operation (Kong et al, 2014;Singh et al, 2017;Sharma et al, 2019;Shi et al, 2020), extremely high sensitivity (Dong et al, 2017;Li et al, 2020), and direct visual effect (Fu W. et al, 2019;Tang et al, 2019;Jiao et al, 2020) and high selectivity (Li X. et al, 2014;Jiang et al, 2017). Most Al 3+ sensors are designed with quite complex structures, which are difficult to synthesize and dissolve in water Li T. et al, 2014;Gupta and Kumar, 2016;Huang et al, 2016;Balakrishnan et al, 2017). Therefore, it is necessary to develop a water-soluble Al 3+ sensor that can be easily synthesized and can detect Al 3+ with high selectivity in aqueous environments even at very low concentrations.…”

Rhodamine B derivatives-modified upconversion nanoparticles as a fluorescent turn-off–on sensor for the highly sensitive detection of Cu2+ and pyrophosphate

“…Therefore, it is of importance to develop upconversion probes with a broad liner range. Herein, we developed a rhodamine B derivative RBP-(RBP was synthesized according to literature, 16,17 as shown in Fig. S1 †) modied UCNPs as a sensor to detect Cu 2+ and PPi.…”