I Have a Research Support System

After dismissing Senior Sister Tian Qing, Xu Qiu wrote a summary in the office for a while, calculated the time, and entered the laboratory at exactly eleven o'clock, went directly to the fume hood, shut down the selenization reaction, and removed the reaction bottle from the oil bath. rising.

While waiting for the vial to cool, perform preparatory work.

First, take the concentrated hydrochloric acid from the special reagent cabinet for acid and transfer it to the fume hood.

After observing the reagent bottle, I found that the paper label on it was slightly yellowed, obviously corroded by oxidation.

Hydrochloric acid, an aqueous solution of hydrogen chloride, is considered one of the safest acids commonly used in organic laboratories.

The concentration of concentrated hydrochloric acid is about 12 moles per liter, and now 120 milliliters of dilute hydrochloric acid with 2 moles per liter is required.

Xu Qiu directly measured 20ml of concentrated hydrochloric acid in the fume hood, poured it into a disposable PE cup, and then added 100ml of water to dilute it.

Because hydrochloric acid is very volatile, a white mist similar to fuming nitric acid will also be formed after opening the reagent bottle cap, and a faint "sour" smell can be smelled.

Although the fume hood can remove most of the gas and dust through the exhaust fan, some gas molecules will still slip through the net.

After the reaction bottle returned to normal temperature, Xu Qiu hurriedly tapped the plate to check the reaction status.

The systems involved recently are all PDI, and the formulation of the developer does not need to be explored. The volume ratio of petroleum ether: dichloromethane 1:1 is basically a combination of panacea.

Xu Qiu got the result very quickly, and this time he finally didn't have to cry, the result of the board was relatively normal.

The spot of the raw material is very light, and can barely be seen indistinctly. There is a dark main product spot and two very light sample spots. The yield is estimated to be above 80%.

Corresponding to the main product point, there is a high probability that the three nitro sites are replaced by selenium, that 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 bottle directly into the prepared dilute hydrochloric acid, and the 3D-PDI molecules precipitated out quickly.

Then use a Buchner funnel to suction filter, wash repeatedly, use pH test paper to confirm that the pickling is clean, put it into a vacuum oven, and set it to dry at 70 degrees Celsius.

After finishing the post-processing of the product, Xu Qiu started to clean up the experimental garbage.

By the way, I took a look at the photocyclization reaction irradiated by the high-pressure mercury lamp in the fume hood, and everything was normal.

All three reactions will last about 24 hours, and the reactions will not be shut down until tomorrow.

Back at the office, Xu Qiu met up with his seniors and juniors, and went to the cafeteria together.

"Sister, how is the progress of the borate reaction between your two?" Xu Qiu asked casually.

"Referring to my brother's opinion, yesterday I raised the reaction temperature, appropriately extended the reaction time, and doubled the amount of catalyst," Han Jiaying continued after a pause:

"The current yield has increased slightly, barely reaching about 40%. Although the purification is still a bit troublesome, it can barely continue to react."

"That's okay," Xu Qiu nodded, "Although the microwave reactor has been planned to be purchased, it is far from being able to quench thirst. It will definitely not be possible for a while, and we still have to rely on ourselves. Now the production rate can reach 40% That's enough."

"Yes," Han Jiaying asked back, "Brother, what about you?"

"My, it's okay. Now I have developed the third-generation 3D-PDI molecule, and the experience gained can be directly applied to your two systems." Xu Qiu didn't elaborate because many conclusions were Derived through Simulation Lab II, and has no realistic experimental basis.

"Hmm, let me try to use these two types of nuclear units to synthesize the first generation of 3D-PDI molecules." Han Jiaying nodded.

"Sister, I often watch you chasing dramas in silence, how is the experiment going?" Xu Qiu joked.

Chen Wanqing was suddenly stunned by the cue, and quickly retorted, "I don't often follow dramas, I only watched one episode in total."

"As for the experiment, unit A is processed in the morning, and D and A are reacted in the afternoon to formally synthesize the final product of C4."

After chatting for a while about the experiment, the three of them walked to the door of the cafeteria, and then the topic quickly turned to "what to eat today".

...

After lunch, the three returned to the microelectronics building. At the gate downstairs, they met another group of people.

Five men and three women, one of them happened to be Xu Qiu's acquaintance, Sun Yifan, who was very recognizable because of his tall stature.

Xu Qiu immediately understood that these people should all be students of Wanyousheng, and some of them were probably postdoctoral fellows depending on their age. Their main laboratory is in Zhangjiang, and Handan only has one office.

Seeing that Xu Qiu and Sun Yifan looked familiar, the others took a step forward with interest, leaving the two of them at the entrance of the microelectronics building.

"What a coincidence." Xu Qiu patted Sun Yifan on the shoulder and greeted him.

"Yeah, it seems like the last time we met was 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 sat too far in the class meeting that day, so I didn't see you. Do you often come to Zhangjiang recently?"

"It's okay, we have two laboratories, Zhang Jiang mainly does synthesis, and Handan mainly does devices, so we have to run at both ends." Xu Qiu spread his hands helplessly and changed the subject, "By the way, how did you do in your graduation project? How is it?"

"I just opened a question. A post-doctoral brother took me to do an experiment. It's no problem to collect some data. What about you?" Just as the words came out, Sun Yifan slapped his forehead, "I heard that you have published several articles. Graduation Design is definitely not a problem."

"No way." Xu Qiu waved his hand modestly.

The circle of scientific research is very small, and the reputation of an undergraduate student like him who can fight has already spread in the department, especially the graduate students at the same level know more or less about his deeds.

Of course, it will be very difficult to further spread the reputation outside the department and outside the school.

Research scholars are not celebrities and Internet celebrities. Posting a sensational event in the industry like Nature may not even make it to the hot searches.

The two chatted politely for a while, said goodbye and left.

Speaking of which, although Xu Qiu and Wan Yousheng's research group are in the same laboratory building, because they are on different floors, and the opposite party is a laboratory beginning with B, the vertical distance is also very far, and the two groups of people are almost separated. chance to meet.

Occasionally meet at the door, because there is no acquaintance, and there is little communication.

Wan Yousheng is also related to semiconductors, but his main research direction is optical detectors. He is a "Yangtze River" scholar. He is considered a top professor in the Department of Materials without academicians, so the proportion of postdoctoral fellows in his research group is not low. .

Wei Xingsi is one of the "thousands of young people", and compared with the "Yangtze River" with a thousand voices, there is still a big gap.

The advanced route of "Qingqian", the next level is usually "Jieqing", after that is "Yangtze River", and the next level is academician.

Moreover, the country has age restrictions on the declaration of these titles. The titles of "Jieqing" and "Yangtze River" and science and engineering are all before the age of 45. Now Teacher Wei is in his early 40s.

If Mr. Wei wants to take a step closer, he has to hurry up and make a lot of scientific research results within a few years.

As for where the results come from, it mainly depends on how hard the students are.

This is also the main reason for his strict requirements on students.

Progress, who wouldn't?

PS: I asked for a monthly pass at the beginning of the month. I updated almost 200,000 words last month. I will continue to work hard this month and strive for more outbreaks!

PS2: I also want to improve, now 700 are ordered, I don’t know when it will be thousands, I hope book friends can come to the starting point to support the genuine version...