A Strecker-like reaction triggering fluorescent sensing platform for enzyme-free and visual quantitative monitoring of carbamates

MXene quantum dots for ratiometric fluorescence detection of a Bacillus anthracis biomarker

“…The fluorescence photos were captured by the camera in the smartphone, and the photo color information (R/B ratio values) was analyzed by a color recognition app, which was used as a quantitative determination parameter for DPA detection. 11,58 A linear relationship of R/B = 0.00906[DPA] + 0.238 ( R 2 = 0.999) with a very low LOD of 52.4 nM was found. The MQD-based test paper for DPA detection implies the potential practicability of MQD-based test paper for fluorescence sensing applications in the future.…”

A dinuclear CdII cluster-based stable luminescent metal–organic framework for the consecutive and visual detection of H2PO4− and OCN−

“…18,23 Compared with most fluorescent probe materials, LMOFs can be designed by connecting different organic ligands according to requirements to easily distinguish analytes and interferents through special functional groups. 24 Yamato et al have developed a new type of fluorescence sensor, which exhibited ratiometric selectivity for Zn 2+ and H 2 PO 4 − ions in neutral solution. A simple logic circuit for a molecular traffic signal with the help of binary logic based on an INHIBIT and OR gate using Zn 2+ and H 2 PO 4 − ions as chemical inputs has been constructed and evaluated.…”

FRET-Based Host–Guest Supramolecular Probe for On-Site and Broad-Spectrum Detection of Pyrethroids in the Environment

“…However, these methods usually require complicated instruments, tedious sample pretreatment, long response times (hours), and skilled staff for data analysis, which severely limits their application for on-site detection. Recently, fluorescence methods have received increasing attention for pesticide analysis owing to their ability to provide rapid, sensitive, and visible responses to analytes. − The optical responses of some fluorescent probes can be captured and subsequently analyzed using portable cameras (i.e., smartphones) instead of expensive instruments, thereby enabling facile and efficient on-site detection. − To date, only a few fluorescent probes have been reported for the detection of PYRs (Table S1), ,,− most of which are on/off probes. The fluorescence intensities of these on/off probes positively correlate with the concentration of PYRs, exhibiting remarkably low limits of detection (LODs).…”