A solvent-free, efficient and rapid approach for synthesis of formazan dyes was developed by diazotization of aromatic amines with NaNO2, nano silica-supported boron trifluoride (nano BF3·SiO2), then diazo coupling with aldehyde phenylhydrazones by grinding method at room temperature. This study aimed to overcome the limitations and drawbacks of the previous reported methods such as: low temperature
通过以下方法开发了一种无溶剂,高效且快速的合成甲dye
染料的方法:将芳族胺与NaNO 2进行重氮化,然后将纳米
二氧化硅负载的
三氟化硼(纳米BF 3 ·SiO 2)重氮化,然后通过研磨法将重氮与醛基苯hydr偶合。室内温度。这项研究旨在克服以前报道的方法的局限性和缺陷,例如:低温,使用腐蚀性和有毒的酸和溶剂,使用缓冲液,芳基重氮盐的不稳定性,中等收率和较长的反应时间。