Development of a dual-responsive ratiometric fluorescent probe for real-time sequential detection of HO and Ag.

Hydrogen peroxide (HO) and silver ions (Ag) are of considerable interest due to their critical roles in chemical and biological processes and their potential environmental and health risks. In this study, a novel dual-response ratiometric fluorescent probe (FBHP), based on an internal charge transfer (ICT) mechanism, was designed and synthesized for the real-time dual detection of HO and Ag. The probe utilizes triphenylamine as a luminescent platform, while azacrown [N, S, O] groups and phenylboronic pinacol ester groups serve as recognition sites for Ag and HO, respectively.

The Fluorescent Sensing of BF and Amines: A Dual Approach with Hydrazone Ligands.

BF, volatile amines (VOAs), and biogenic amines (BAs) are the key indicators in chemical reaction catalysis and food quality monitoring. In this study, we present two types of fluorescent sensors, a hydrazone ligand (HL)-based fluorescent sensor for BF detection and a novel sensor array using six boron difluoride (BF) hydrazone complexes (BFHs) for monitoring VOAs and BAs. Spectral research indicates that the interaction mechanism between the HLs and BF is based on intramolecular charge transfer (ICT).

Research on the model of staggered tooth phase to reduce vibration of single-stage gear transmission system: Theoretical analysis and experiments.

Aiming at the problems of high vibration and high noise in gear transmission systems, a model of gear with staggered tooth phase structure(GSTPS) for reducing vibration is proposed. Without changing the overall structure of the gear transmission system, the purpose of reducing mesh stiffness fluctuations is achieved by staggering adjacent gears at a certain angle along the axis, thereby the vibration of the gear transmission system could be reduced. The characterization method of time-varying mesh stiffness of the GSTPS is studied.