Study Of Synthesis And Properties Of Derivatives Of 2-(2-Pyridyl)-4-phenylthiazole As Fluorescent Sensor

Molecular fluorescence has been widely used in materials chemistry, supramolecular chemistry, environmental chemistry, and so on, and gradually, as a hot spot in the research of various disciplines. Compared with other analytical methods, the fluorescence analysis method has the advantages of simple operation, high selectivity and high sensitivity, and is paid more attention by researchers. So, it is of great significance for the design and properties of functional fluorescent molecules.In this paper we will with pyridine group thiazole derivatives as the parent, thiazole 4,5 were modified to get the target compounds have good fluorescence properties, in terms of fluorescent sensor has a broad application prospect. So in this paper, the design and synthesis of the target compound monomer 2-PTP and derivatives 2-PTA, bis(2-PTP) three thiazole compounds; and the effects of the purple outside 2-PTP,2-PTA, bis(2-PTP) visible absorption spectra and fluorescence emission spectra, the spectral response of 2-PTP, bis(2-PTP) for various metal ions, monomer 2-PTP of Fe3+is selective, the performance of fluorescence intensity enhanced, was obtained through calculation ligand and Fe3+ with a ratio of 2:1, the complexation constants for 5.25 x 104M"2.2-PTP is based on the dual wavelength ratio of pH fluorescence sensor.In addition, the effect of pH on the fluorescence of was explained from the structural symmetry of bis(2-PTP).Based on pH effect on the absorption and emission spectra combined with pyridine thiazole fluorescence generation mechanism, and puts forward the step by step process of protonation to explain the influence of spectral behavior of pH of 2-PTA.Therefore, the compound monomer 2-PTP and its derivatives 2-PTA, bis (2-PTP) are expected as a new type of Fe3+ fluorescent sensor.