Tetraphenylethene probe based fluorescent silica nanoparticles for the selective detection of nitroaromatic explosives

Abstract

A sensitive fluorometric method is developed utilizing aggregation-induced emission probe based silica nanoparticles for the detection of nitroaromatic explosives.

Recent advances in aggregation-induced emission (AIE)-based chemosensors for the detection of organic small molecules

“…More recently, Sohn et al synthesized π–σ* conjugated bissilole-benzene nanoaggregates ( D13 ) with a high PLQY of 55% that can detect NACs via PET. 353 Homogeneously-sized TPE based fluorescent silica NPs ( D14 ) were prepared by Yu et al for the detection of NACs such as PA, DNT, and TNT, with a sensitivity of up to 0.01 μM for PA. 354 The overlapping of the NACs absorbance band and emission spectra of D14 led to IFE and quenching of the blue fluorescence of the chemosensor. Using a TPE-based silane, Li and Yang et al developed helical mesoporous organic–inorganic hybrid silica nanofibers ( D15 ) with a pore diameter of 2 nm.…”

Selective Supramolecular Recognition of Nitroaromatics by a Fluorescent Metal–Organic Cage Based on a Pyridine-Decorated Dibenzodiaza-Crown Macrocyclic Co(II) Complex

“…81 Therefore, the application of an FL chemosensor appears to be a reliable method due to the high sensitivity and rapid response time, alongside a simple fluorescence quenching process based on the energy and/or electron transfer mechanisms. 82−85 Many fluorescent-based chemosensor molecules such as metal− organic frameworks, 86,87 nanomaterials, 88,89 conjugated polymers, 90−92 and quantum dots 93,94 have been reported as the chemosensors for NACs. For instance, a few cage receptors based on the nature of bound molecules are important targets for the future development of the above sensors due to their obvious improvement in receptor selectivity.…”

“…Due to increasing concerns for environmental pollution because of their highly explosive nature and being very difficult to detect, the design and development of chemosensors for the rapid and selective detection of NACs are extremely urgent. , The high degree of electron deficiency owing to the presence of electron-withdrawing nitro groups awards NACs the electron-accepting nature alongside the oxidative character . Therefore, the application of an FL chemosensor appears to be a reliable method due to the high sensitivity and rapid response time, alongside a simple fluorescence quenching process based on the energy and/or electron transfer mechanisms. − Many fluorescent-based chemosensor molecules such as metal–organic frameworks, , nanomaterials, , conjugated polymers, − and quantum dots , have been reported as the chemosensors for NACs. For instance, a few cage receptors based on the nature of bound molecules are important targets for the future development of the above sensors due to their obvious improvement in receptor selectivity …”

Fluorenone-Based Fluorescent and Colorimetric Sensors for Selective Detection of I–Ions: Applications in HeLa Cell Imaging and Logic Gate

“…As a part of our ongoing studies on the development of fluorescent sensors, − two fluorenone-based sensors 1 and 2 were designed and synthesized for the sensitive detection of I – ions based on fluorescence enhancement to avoid its intrinsic fluorescence quenching nature. The design of sensors 1 and 2 plays a vital role in their fluorescence enhancement response for I – ions.…”