F-53, a new type of chromium fog inhibitor developed by him, is original in China and has been used by more than a thousand electroplating plants in China, making an important contribution to national environmental protection and energy saving.
He systematically studied the chemistry of perfluorosulfonic acid. Based on the study of difluorocarbon chemistry, he synthesized and developed a variety of reagents and systems that can efficiently realize trifluoromethylation. The most widely used methyl fluorosulfonyl difluoroacetate is called "Chen Qingyun reagent", and major reagent companies are still listed.
He introduced one of the most important theories of contemporary organic chemistry-single electron transfer reaction into the research of fluorine chemistry, and his achievements won many national, provincial and municipal awards.
He is regarded as one of the founders of organic fluorine chemistry in China and has made great contributions to the development of organic chemistry in China.
He is Chen Qingyun, an academician of China Academy of Sciences, a famous organic chemist and an internationally renowned organic fluorine chemist.
1955, Chen Qingyun was admitted as a graduate student by the Soviet union. The following year, he entered the Institute of Elemental Organic Compounds of the Soviet Academy of Sciences to pursue an associate doctorate. He studied under I.L. Knutyants, an academician of the Soviet Academy of Sciences, and Dr. N. P. Gambaryan, an academician of the Soviet Academy of Military Sciences.
Under the guidance of his tutor, Chen Qingyun began to study hexafluoroacetone and some basic reactions. Before him, scientists have tried many synthetic methods of hexafluoroacetone, but often because the process is too complicated, they have not got good experimental results. The pyrolysis method invented by Chen Qingyun is very simple. The raw material needed is PTFE waste and powder made from waste products, which is very easy to obtain, economical and practical.
But this method will produce toxic gases such as perfluoroisobutylene, and people will cough violently after smelling perfluoroisobutylene, which will affect their health. How to deal with it? After drinking two bottles of raw milk, the symptoms can be alleviated, and then Chen Qingyun goes on working. He considered that, on the one hand, the opportunity to study in the Soviet Union is precious, and it is very difficult for the motherland to send him out to study under such difficult conditions; On the other hand, I think that I can't lose face to China people abroad, so I cherish my time, study hard, study more and do more experiments.
His white blood cell count continued to decrease due to poor ventilation in the laboratory that year. At that time, the effective way to deal with this situation was to inject expensive vitamin B 12, but the material conditions in Chen Qingyun could not be met.
Dr. N. P. Gambaryn, the little tutor, took out his own fee (there was a fee for writing a review article in the Soviet Union, but there was not much money) to buy vitamin B 12 for injection for Chen Qingyun, which made him particularly moved.
Later, his white blood cells were too low, and his white blood cell count could not go up after taking vitamin B 12. It still affects his health and even leads to his daughter's low white blood cell count.
In the long-term study of hexafluoroacetone reaction, Chen Qingyun found a method to prepare hexafluorobisphenol A, an important chemical raw material. Through many experiments, Chen Qingyun found that anhydrous hydrogen fluoride is a good condensation agent for the reaction of hexafluoroacetone with phenol. The method has the advantages of simple reaction route, mild reaction conditions, simple post-treatment, 80%-90% yield, cheap and easily available raw materials, and is very practical and efficient.
1958, this method was patented by the Soviet union. Up to today, the world's major chemical companies are still producing hexafluorobisphenol A by this method. Chen Qingyun himself was awarded the honorary certificate of this research at the meeting of young experts of the Institute of Element Organic Compounds of the Soviet Academy of Sciences 1959 in June.
Traditionally, on the day of defense, Chen Qingyun will hold a reception to thank all colleagues in the research room. To this end, Chen Qingyun went to the consulate in China early to buy "scarce" soy sauce (the Soviet Union didn't sell soy sauce in those days, but later, in order to take care of China students, he could go to the consulate in China to buy a small amount), and personally made a braised chicken with China flavor to thank all colleagues in the research room. After they tasted it, they were full of praise.
Before leaving for home, colleagues in the laboratory gave him two things as souvenirs, a board made of PTFE and a stick. This seems a bit "unbelievable" now. But in those days, China was still very "rare and precious" because it didn't have the conditions and ability to produce PTFE at that time. Chen Qingyun has kept this PTFE plate to this day; Teflon rods were transferred to others for experiments.
After returning home, Chen Qingyun entered the Institute of Chemistry of the Chinese Academy of Sciences, and later transferred to the Shanghai Institute of Organic Chemistry of the Chinese Academy of Sciences. He has served as an associate researcher, researcher, doctoral supervisor, director of fluorine chemistry laboratory and academician of China Academy of Sciences. During this period, he always focused on the research of fluorine, engaged in the research of organic fluorine chemistry and fluorine materials for a long time, and achieved a lot of important research results, which made outstanding contributions to the development and personnel training of fluorine chemistry and fluorine chemical industry in China.