Electrospun nanofiber sheets mixed with a novel triphenylamine-pyrenyl salicylic acid fluorophore for the selective detection of picric acid

Multistimuli‐responsive fluorescence behaviours of aggregation‐induced emission small‐molecule and electrospun nanofibre films for acid–base vapour sensing

“…The TPECNPy‐2‐HCl‐NH 3 and TPECNPy‐3‐HCl‐NH 3 films gave rise to an obvious blue shift in fluorescence emission compared with the TPECNPy‐2‐HCl and TPECNPy‐3‐HCl films, with emission wavelengths of 508 nm and 512 nm, respectively, almost coinciding with the spectra of their corresponding nascent TPECNPy‐based nanofibrous films. These results suggested that the electrospinning technique is a simple and efficient method to prepare CA‐TPECNPy‐based nanofibrous fluorescent films with good reversible acid‐induced discolouration properties, and highlight an effective strategy to develop fluorescent film sensors for reversibly detecting pH [26, 29].…”

“…Currently, almost all multistimuli-responsive AIE materials with fluorescent sensing ability are based on small organic molecules. However, they show poor recyclability, which could cause secondary pollution due to difficulties separating them from the detection system [29]. Designing an AIE polymer film-based sensor has become an effective alternative due to its recyclability and nonpolluting nature [30,31].…”

“…An alternative solution is to fabricate fluorescent nanofibre films mixed with AIE-based small organic molecules using electrospinning [26,29], because this is a widely used scalable technique for the preparation of nanofibre films with high specific surface area and porosity [26,32,33]. Electrospun nanofibre films for fluorescent sensing have been shown to improve the sensitivity and response rate and have therefore received considerable attention [34].…”

D–π–A–π–D-Configured Imidazole-Tethered Benzothiadiazole-Based Sensor for the Ratiometric Discrimination of Picric Acid: Applications in Latent Fingerprint Imaging

“…Although many reports are available on the detection of nitro explosives, the design of an efficient, reliable, and selective sensor for the recognition of PA is still considered a difficult task because of the inevitable interference from other explosives. Fluorescent sensors based on highly emissive fluorophores such as pyrene, calixarene, julolidine, terpyridine, quinoline, naphthalimide, rhodamine, benzothiazole, perylene, and triphenyl amines have been widely employed for the sensitive detection of nitro explosives. Most of the PA detection reports demonstrate turn-off fluorescence, − and only limited reports are available on the ratiometric discrimination of PA. , In the recent past, imidazole derivatives have gained enormous significance because of their versatile applications in OLEDs, , organic transistors, and sensors .…”

Application of aza-BODIPY as a Nitroaromatic Sensor

“…Most of them cause skin and eye irritation, liver damage, and anemia. Especially, exposure to picric acid (TNP) can cause nausea, cyanosis, and cancer, whereas 2,4,6-trinitrotoluene (TNT) causes headache and weakness. , The acceptable level of TNT concentration in drinking water is 2 ppb according to the U.S. Environmental Protection Agency (EPA) and the permissible TNP concentration is 2 μM . As a result, monitoring and detection of NACs, as one of the common explosives, is highly important.…”