Hydrazine-Sensing Performance For Perylene Diimide Derivatives And The Applications Of Reduction Of Radicals Anion

Hydrazine has high reducibility and is an important chemical raw material.Due to the high toxicity of hydrazine,even trace amounts of hydrazine can also cause great harm to the human body.Therefore,various sensors for detecting trace amounts of cesium have been the focus of research.The perylene diimide derivatives are important n-type semiconductors with low reduction potentials and are easily reduced to the corresponding anion radicals or divalent anions.There is a huge difference in the conductivity of the materials before and after reduction.At the same time,the reduced phthalimide anion radical has a certain reduction.Based on the above principles,the perylene diimide derivative TClPDI with strong electron-withdrawing groups Cl and F introduced into the bay and amine sites respectively was designed and synthesized.It was used as a colorimetric probe and fluorescent probe to detect hydrazine.The TClPDI thin-film sensor was prepared by vacuum evaporation to detect the sensing performance of antimony.The metal ion was reduced and detected by the reductive property of the anion radical of perylene diimidederivative.The results are as follows:The TClPDI was used as a colorimetric probe and fluorescent probe to detection of hydrazine in aqueous solution successfully:TClPDI as a colorimetric probe can detect hydrazine linearly in the range of 0.317 to 2.895 nmol,and the linear correlation coefficient is R²=0.989,the detection limit was 1.94 nM.The TClPDI as a fluorescent probe could detect the range of hydrazine linearly from 0.645 to 3.57 nmol,and the linear correlation coefficient is R²=0.9857.The thin film sensor was fabricated with TClPDI as sensing material.The performance and sensing mechanism of the hydrazine vapor were studied.The results showed that the sensitivity of the TClPDI thin film sensor in the 10 ppm hydrazine hydrazine vapor was 63.78%and the response time was 26 s.The detection limit for hydrazine 0.6 ppm,and the thin-film sensor has better selectivity for hydrazine among hydrazine,ethanediamine and triethylamine.Since the extremely low reduction potential of TC1PDI is-0.0117 V,and DMF can be used as an electron donor,the free radical anion TC1PDI^·-can be obtained after TClPDI solution is DMF.The reduction of metal ions can be achieved by using this TClPDI^·-,For example,Ag+can be reduced to elemental Ag,Cu²⁺can be reduced to elemental Cu⁺and Cu,and Fe³⁺can be reduced to Fe²⁺or the like.The detection of metal ions(Fe³⁺,Cu²⁺,Hg²⁺,etc.)can be achieved using the environment-stable ruthenium imide radical anion salt DBrPDI-K as a colorimetric probe,and calculation is performed when the signal-to-noise ratio?S/N?is 3 The detection limits of Fe³⁺,Cu²⁺,and Hg²⁺were 57 nM,2.15 nM and 135 nM,respectively.