In this communication, for the first time we have constructed a series of novel azo group fused 2H-chromene-3-carboxylate and 3-acetyl-2H-chromene derivatives via the Knoevenagel condensation reaction of active methylene compounds with aromatic 5-arylazosalicylaldehydes followed by a nucleophilic addition of the phenolic hydroxyl group to the carbonyl group of one of the ester groups. Shorter reaction
Insights into the adsorption and corrosion inhibition properties of newly synthesized diazinyl derivatives for mild steel in hydrochloric acid: synthesis, electrochemical, SRB biological resistivity and quantum chemical calculations
作者:Mahmoud A. Bedair、Hani M. Elaryian、Ehab S. Gad、Mubark Alshareef、Ahmed H. Bedair、Rabab M. Aboushahba、Abd El-Aziz S. Fouda
DOI:10.1039/d2ra06574f
日期:——
Langmuir isotherm. The thermodynamic activation functions of the dissolution process were also calculated as a function of inhibitor concentration. UV-vis, scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX) techniques were used to confirm the adsorption phenomenon. The quantum chemical parameters, inductivelycoupledplasmaatomicemissionspectroscopy (ICPE) measurements
两种偶氮衍生物,4-((4-羟基-3-((4-氧代-2-硫代噻唑烷-5-亚基)甲基)苯基)二嗪基)苯磺酸(TODB)和4-((3-((4,合成了 4-二甲基-2,6-二氧亚环己基)甲基)-4-羟基苯基)二嗪基)苯磺酸(DODB),并使用傅里叶变换红外光谱(FTIR)、质子核磁共振( 1 H-NMR)和质谱进行表征光谱研究。采用重量分析法、动电位极化(PDP)、电化学阻抗谱(EIS)、电化学调频(EFM)技术和电感耦合等离子体发射光谱法验证了上述两种化合物作为低碳钢(MS)腐蚀的能力1 M HCl 中的抑制剂。 Tafel 数据表明 TODB 和 DODB 具有混合型特性,EIS 结果表明,增加它们的浓度不仅使低碳钢的电荷转移 ( R ct ) 从 6.88 Ω cm 2改变到 112.9 Ω cm 2 ,而且还改变了吸附双层( C dl )从225.36μF cm -2 到348.36 μF
Tummeley, Justus Liebigs Annalen der Chemie, 1889, vol. 251, p. 182
作者:Tummeley
DOI:——
日期:——
Tanaka, M., Bulletin of the Chemical Society of Japan, 1964, vol. 37, p. 1210 - 1216