Highly sensitive sensing of polarity, temperature, and acid gases by a smart fluorescent molecule

Multi-stimuli distinct responsive D–A based fluorogen oligomeric tool and efficient detection of TNT vapor

“…The large change of emission wavelength (i.e., 94 nm) is the second to the best reported so far. 96 This red-colored emission returned to the original emission by neutralization with base NEt 3 vapors. Another way to achieve the original emission was by keeping it as such at room temperature for 24 hours (Fig.…”

Smart Stimulation Response of a Pyrene-Based Lanthanide(III) MOF: Fluorescence Enhancement to HX (F and Cl) or R-COOH and Artificial Applicable Film on HCl Vapor Sensing

“…A very stable hydrogen bond network was formed between the coordination OH − or H 2 O of complex 1 and − COOH functional groups in OA, thus enhancing the emission efficiency by increasing the ring-rotating restriction of aromatic unit pyrenyl and decreasing in nonradiative transitions. 37,57 Furthermore, the interaction of hydrogen bonds enhanced the framework rigidity degree of complex 1 and showed that the fluorescence emission position of complex 1 blue-shifts from 467 to 459 nm. From the ATR-IR spectra (Figure S13), the O−H functional group of complex 1 after detection of OA was also wider than that before detection, indicating the existence of hydrogen bonding interactions between complex 1 and OA.…”

“…However, these methods commonly suffer from the disadvantages of high expense, difficult online monitoring, complex technology, and time consumption, which make them unsuitable for practical applications. In contrast, in possession of high sensitivity, fast response time, more simple operation, and environmental friendliness, fluorescence sensing has become the most promising and advanced technology for acid detection. , Among the various luminescence materials, luminescent MOFs (LMOFs) possess the advantages of tunable structures and ordered channels, endowing them with rich recognition sites that are accessible by exogenous molecules through open pores or channels . Therefore, great attention has been paid to develop LMOFs for the detection of acids with high sensitivity and selectivity.…”

Naphthyl-azine – aggregation induced emission, reversible acidochromism, cyanide sensing and its application in intracellular imaging

“…[35][36][37][38][39] Subsequently, fluorogenic devices fabricated for the detection of volatile acids have drawn considerable interest due to their inevitable implications for the estimation of acidity in the local environment in biology, chemistry, food science, pharmacy, forensic science, etc. 40 Even lower concentrations of such acid vapours are potentially toxic, corrosive, irritant to skin and eyes and cause severe burn to the mucous membrane of the respiratory tract. [41][42][43] Therefore, there is increasing demand for developing improved, cost-effective, reusable and responsive materials for ultra-trace recognition of toxic acid vapors.…”