Chapter 230: Progress, who doesn't want it?

Dismissed Senior Sister Tian Qing, Xu Qiu wrote a review in the office for a while, counting the time, at eleven o'clock, he entered the laboratory, went directly to the fume hood, shut down the selenization reaction, and removed the reaction flask from the oil bath rising.
While waiting for the reaction flask to cool down, make preparations.
First, take concentrated hydrochloric acid from the special acid reagent cabinet and transfer it to a fume hood.
I observed the reagent bottle and found that the paper label on it was slightly yellowish, which was obviously corroded by oxidation.
Hydrochloric acid, an aqueous solution of hydrogen chloride, is considered one of the safest commonly used acids in organic laboratories.
The concentration of concentrated hydrochloric acid is about 12 moles per liter, and now 120 ml of dilute hydrochloric acid with 2 moles per liter is needed.
Xu Qiu directly measured 20 ml of concentrated hydrochloric acid in a fume hood, poured it into a disposable PE cup, and then added 100 ml of water for dilution.
Because of the strong volatility of hydrochloric acid, a white mist similar to fuming nitric acid will be formed after opening the cap of the reagent bottle, and a hint of "sour" can be faintly smelled.
Although the fume hood can remove most of the gas and dust through the exhaust fan, there will still be some gas molecules that will slip through the net.
After the reaction flask returned to normal temperature, Xu Qiu hurriedly checked the reaction situation.
Recently, the systems involved are all PDI, and the formula of the developing agent does not need to be explored. The 1:1 volume ratio of petroleum ether: dichloromethane is basically a combination of magic oil.
Xu Qiu got the result quickly, and finally didn't have to call the this time, the results of the boarding were relatively normal.
The raw material spot is very shallow, which can barely be seen vaguely. There is a dark main product spot and two very shallow sample spots. The preliminary estimate is that the yield is above 80%.
Corresponding to the main product point, there is a high probability that all three nitro sites are substituted by selenium, which is the target product, while the other two sample points may be mono-substituted, di-substituted products or other by-products.
Xu Qiu poured the solution in the reaction flask directly into the prepared dilute hydrochloric acid, and the 3D-PDI molecules precipitated out quickly.
Then use a Buchner funnel to filter, repeatedly wash with water, use pH test paper to confirm that the pickling is clean, put it into a vacuum oven, set 70 degrees Celsius to dry.
After finishing the post-processing of the product, Xu Qiu began to clean up the experimental garbage.
By the way, I glanced at the halo reaction of the high-pressure mercury lamp in the fume hood, everything was normal.
All three reactions should last about 24 hours, and the reaction will not be shut down until tomorrow.
Returning to the office, Xu Qiu joined up with the school sister and the school girl and went to the cafeteria together.
"School girl, how are your two borate reactions progressing?" Xu Qiu asked casually.
"Referring to my senior's opinion, yesterday we raised the reaction temperature, appropriately extended the reaction time, and doubled the catalyst," after a pause, Han Jiaying continued:
"The current yield has increased slightly, barely reaching about 40%. Although the purification is still a bit troublesome, it is barely possible to react further."
"That's okay," Xu Qiu nodded. "Although the microwave reactor has been planned to be purchased, it can't quench the near thirst. It will definitely not be possible for a while. We still have to rely on ourselves. Now the yield rate can reach 40%. Enough."
"Yes," Han Jiaying asked rhetorically, "Brother, how about you?"
"I, it's okay. Now that the third generation of 3D-PDI molecules has been developed, the experience gained can be directly applied to your two systems." Xu Qiu didn't elaborate, because many conclusions are There is no realistic experimental basis for the results obtained through the simulation laboratory II.
"Well, let me try to use these two nuclear units to synthesize the first generation 3D-PDI molecules." Han Jiaying nodded.
"Senior sister, I often watch you chase drama in silence, how is the experiment progressing?" Xu Qiu joked.
Chen Wanqing was suddenly cueed, stayed for a while, and quickly retorted, "How often do I chase dramas? I watched a good episode in total."
"As for the experiment, unit A was processed in the morning, and D and A reacted in the afternoon to formally synthesize the final product of C4."
After talking about the experiment for a while, the three of them walked to the entrance of the cafeteria, and then the topic quickly skewed to "what to eat today".
...
After lunch, the three returned to the Microelectronics Building. At the gate downstairs, they ran into another group of people.
Five men and three women, one of whom happened to be Xu Qiu's acquaintance, Sun Yifan, was very recognizable because of his height.
Xu Qiu immediately understood that these people should all be students of Wanyou, who are probably postgraduates based on their age. Their main laboratory is in Zhangjiang, and Handan has only one office.
Others saw Xu Qiu and Sun Yifan familiar with each other, and they all took a step ahead with interest, leaving them both at the entrance of the Microelectronics Building.
"What a coincidence." Xu Qiu patted Sun Yifan on the shoulder and greeted him.
"Yes, the last time we met seemed to be last semester." Sun Yifan sighed.
"No, I saw you at the class meeting a few days ago." Xu Qiu joked.
"That's right," Sun Yifan smiled heartily, "but I was sitting too far in front of the class meeting that day, but I didn't see you. Have you come to Zhangjiang often these days."
"Well, we have two laboratories. Zhang Jiang mainly does synthesis, and Handan mainly makes devices, so I have to run on both ends." Xu Qiu helplessly, changed the topic, "By the way, how did you do your graduation project? How is it?"
"I just opened a question. A post-doctoral fellow took me to do an experiment. There is nothing wrong with collecting some data. What about you?" Sun Yifan patted his forehead as soon as the words were spoken, "I heard that you have posted several articles after graduation. Design is definitely not a problem."
"Nothing." Xu Qiu waved his hand modestly.
The scientific research circle is very small, and the reputation of undergraduates like him who can play has long been spread in the department, especially the undergraduates at the same level know his deeds more or less.
Of course, it is very difficult for the reputation to spread outside the department and school.
Research scholars are not celebrity internet celebrities. If you post an industry sensation like Nature, you may not even be able to get a hot search.
The two were polite for a while, and said goodbye to leave.
Speaking of it, although Xu Qiu and the Wanyousheng research team are in the same laboratory building, they are on different floors and the other party is a laboratory starting with B. The vertical position is also very far away. There are almost no people in the two groups. Opportunity to meet.
Occasionally met at the door, because there is no acquaintance, there is no communication.
Wanyousheng is also related to semiconductors, but his main research direction is photodetectors. He is a "Yangtze River" scholar. He is considered a top professor in the Department of Materials without an academician. Therefore, the proportion of postdoctoral fellows in his research group is not low. .
Wei Xingsi is a "Thousand Young People~EbookFREE.me~" Compared with Wanyousheng's "Yangtze River", there is still a big gap.
"Qingqian"'s advanced route, the next level is usually "Jieqing", then "Yangtze River", and then the academician.
Moreover, the country has age restrictions on the declaration of these titles. The declaration ages for the titles of "Jieqing" and "Yangtze River" in science and engineering are both before 45 years old. Now Mr. Wei is in his early 40s.
If Teacher Wei wants to be one step closer, he has to hurry up and make a lot of scientific research results in a few years.
As for where the results come from, it mainly depends on the students' lack of strength.
This is also the main reason for his strict requirements on students.
Progress, who doesn't want it?
PS: I asked for a monthly pass at the beginning of the month. Last month, I updated almost 20W characters. This month I will continue to cheer for more outbreaks!
PS2: I also want to improve. Now 700 are all ordered. I don't know when it will be thousands. I hope that book friends can come to the starting point to support the original...