Viscosity is one of the most important physical parameter toward liquid, noninvasive and effective viscosity inspection method toward liquid safety is urgent to be developed. In this study, two kinds...
Noninvasive and effective viscosity inspection method during the liquid deterioration process is urgent to be developed, since viscosity is one of the most important physical parameter toward liquid. The method...
Noninvasive and effective viscosity inspection method during the liquid deterioration process is urgent to be developed, since viscosity is one of the most important physical parameter toward liquid. The method with rapid detection, high sensitivity, cheap equipment, and fast results output is obliged to be exploited. In this study, one kind of viscosity-sensitive molecular rotor (BTPEQ) with large Stokes shift (187 nm), and long emission wavelength (648 nm) has been developed. The rotor comprised bithiophene donor and quinolinium acceptor, and displayed typical twisted intramolecular-charge transfer (TICT) feature, with good photostability, selectivity, universality in various commercial liquids. With the aid of BTPEQ, the thickening effects of liquid thickeners can be captured. More importantly, BTPEQ was explored to visualize the viscosity variations in the liquids at different metamorphic stages, and found that the microenvironment viscosity level is highly dependent on the liquid food metamorphic period. It is noting that this approach can facilitate the continued perfection of fluorescent analytical methods toward food quality and safety inspection.
Liquids spoiled is considered gradually as a serious public problem, and heavily medical burden has been caused by this. We suspected that the viscosity level in the deterioration process is higher than those in the normal ones. For this reason, we have presented promising sustainable natural product, 4-(dimethylamino)cinnamaldehyde (DLCA), for monitoring micro-environmental viscosity alterations to achieve liquid safety inspection in a high sensitivity, rapid detection, and cheap equipment dependence pathway. This natural sensor with large stokes shift of 106.8 nm and maximum emission wavelength of 486.0 nm with high signal-to-noise ratio intensity. DLCA is consisted of a typical dimethylamine donor and aromatic aldehyde acceptor, connected with a rotatable single and double conjugated bond. The fluorescence intensity of this natural sensor increased 70 times with the enhancement of viscosity. The interference of other microenvironments such as pH and polarity, various potential analytes can be reduced. With the assistance of the fluorescence imaging technique, DLCA could sensitively and selectively non-invasively identify thickening efficiency of various thickeners. Furthermore, DLCA may provide an attractive way to evaluate liquid deterioration extent with viscosity as a robust marker. We expected that this unique strategy will accelerate the efficient utilization of clean and reproducible resources.
Flavonoid derivate: isoliquiritigenin as a natural molecular sensor extracted from licorice for viscosity detection in liquids via the fluorescent technique.
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