A series of novel imidazole derivatives containing indole or carbazole unit were efficiently synthesized via one-pot reaction of benzil/9,10-phenanthraquinone, indole-3-carbaldehyde/carbazole-3-carbaldehyde and ammonium acetate utilizing glacial acetic acid as solvent and catalyst. The effects of selection and amount of solvents, molar ratio of the reagents, and temperature on the reactions have been surveyed. The photophysical properties of the synthesized products were also investigated, and two compounds possessing structural characteristics and pH-sensitive were selected as pH fluorescent probes. Furthermore, the fluorescence imaging of MCF-7 cells in different pH environments in the presence of the probe 2-(9-benzyl-9H-carbazol-3-yl)-1H-4,5-diphenylimidazole (2d) or 2-(9-benzyl-9H-carbazol-3-yl)-1H-phenanthro[9,10-d]imidazole (4) was detected, and the results revealed that the two probes show promising potential to be used in detecting pH changes in living cells as pH fluorescent probes.
Abstract.A nonlinear and coupling model is established according to the multi-layer register system working principle in gravure printed electronic equipments, and then, the linear model of the register system is constructed based on one order Taylor formula. In order to improve the speed and accuracy of register control, a feedforward PID control algorithm is presented according to the linear model in multi-layer register system. This algorithm is unique in that it uses the PID to adjust the inputs of the register system, and feedforward compensation for the known disturbance, making the register control accuracy has been greatly improved. The simulation shows that the proposed register controller is able to realize a high precision control for the register system and endowed with better control performance than PID controller in register control.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.