Chapter 292: From now on, I will be yours

For most senior undergraduates, the time after graduation is the last carnival moment.
Because after that, whether it is entering society, entering work, starting from the screw, or going abroad, entering the research team, continuing to do scientific research, and further education, the days of freedom in student days will never return.
Different people have different choices. Xu Qiu’s two roommates, Tao Yan, began to prepare for graduation trips. It is said that he planned to spend a month traveling around the world; Ren Bin stayed in the dormitory and played a game of liver explosion. Make up for less than two years of the computer.
As for Xu Qiu, he decided to continue to struggle in the field of scientific research.
Xu Qiu started the experiment plan very early, and the medicines were bought in advance.
In the afternoon, he refined it again and got the final version, generally following the previous four optimization paths.
The first and second paths both modify the IDT unit and optimize the conjugated main chain and side chain respectively.
Xu Qiu found the first report on the IDT unit several years ago, and got the IDT synthesis method. Although its molecular structure looks complicated, the synthesis route is surprisingly simple, requiring only three steps.
In the first step, the dibromo-substituted ethyl terephthalate (B) at the 2,5 position is reacted with the thiophene (T) unit substituted with monotrimethyltin. The reaction type is Stille reaction to generate TBT with a carbon-carbon single bond phase. Linked structure, in which the B unit, that is, two ethyl formate groups connected to the benzene ring.
The second step is to react with the ester group with n-butyllithium, and then add benzene substituted by bromine and hexyl at the 1, 4 positions respectively. Two hexyl phenyl groups are connected to the original ester group position and introduced as a side chain. At the same time, a hydroxyl group is generated.
In the third step, catalyzed by sulfuric acid and acetic acid, the hydroxyl group and a hydrogen atom on the thiophene ring of the partition wall are dehydrated to form a ring, forming a structure of five linear fused rings, which is the structure of TTBTT, in which the two T units in the middle are connected to each other Two hexyl phenyl side chains, this is the structure of the commercial IDT.
Based on the structure of IDT, Xu Qiu suddenly came up with a synthetic route:
In the first step, you can change the T unit to the TT unit, and the other steps remain unchanged, you can get a structure with seven linear conjugated fused rings, that is, the TTTBTTT structure. This structure was named IDTT by Xu Qiu. By analogy, a series of materials can be synthesized.
Xu Qiu started brainstorming and conceived a total of more than a dozen structures: the central core unit can be a benzene ring or a benzodithiophene BDT, and two core units can be introduced to obtain a conjugated fused ring with a digital even number. Unit.
In the second step, the type of side chain can be changed to introduce thiophene side chains, benzene ring side chains at different positions, and other side chains.
In addition to the scheme of modifying the IDT unit, there is also an optimization of the structure of the ICIN unit, which is the third path.
Similarly, Xu Qiu turned to a document in the past few years, which introduced "a method for synthesizing 1,3-indenedione":
In the first step, phthalic acid and acetic anhydride react to form phthalic anhydride.
In the second step, phthalic anhydride reacts under the conditions of acetic anhydride, triethylamine, and tert-butyl acetoacetate to form 1,3-indenedione.
As long as a group is introduced into the phthalic acid in the first step, a derivative of 1,3-indenedione can be obtained through a similar reaction, and then reacted with malononitrile to obtain a derivative of ICIN. .
Xu Qiu's preliminary plan is to introduce monomethyl, dimethyl, monofluorine, difluorine, monochlorine and dichlorine atoms.
Among them, the difficulty of introducing methyl and chlorine atoms is relatively small, raw materials can be purchased directly, and no additional steps are required.
However, the difficulty and danger of introducing fluorine atoms are increased because potassium fluoride reagent is used and additional reaction steps are required.
As for the fourth path, Senior Sister Chen Wanqing has already started, and Xu Qiu has not considered it for the time being.
Xu Qiu's overall plan is to first synthesize one or two materials for each of his plans. After getting familiar with all the synthesis experiments, he can ask two simulation experimenters in the simulation laboratory to help synthesize other similar materials.
After all, the premise for simulation experimenters to start work is that Xu Qiu must have done similar experiments himself.
After eight o'clock in the evening, almost nine o'clock, Wei Xingsi came back from outside, his face was red.
It seems that the department didn't treat the teachers who were in charge of defending them badly.
Teacher Wei directly approached Xu Qiu and confessed: "This graduation defense, you are the first person with a score of 99 points. I propose to Zhou Mathematics to submit your graduation thesis and select the top ten outstanding undergraduates in the magic city. The graduation thesis, the problem shouldn't be big."
Xu Qiu let out an "um" without saying more, this was all expected.
Wei Xingsi continued: "Xu Qiu, what arrangements do you have next? If you want to go out and play, I will give you a one-month vacation, or two months."
Xu Qiu was taken aback on the spot, and thought to himself: "It's really strange that this can be said from Teacher Wei's mouth. Generally, he doesn't want students to do more work."
Hello everyone, our public account will find gold and coin red envelopes every day, and you can receive them as long as you pay attention. Please seize the opportunity for the last benefit at the end of the year. Public Account [Book Friends Base Camp]
However, Xu Qiu had already made the decision, so he didn't hesitate to say, "I plan to continue the experiment, and I have already planned the next experiment route."
"Okay, very good," Wei Xingsi said twice, and waved to Xu Qiu: "Come to show me, come to my office."
Xu Qiu took the U disk and followed Teacher Wei into Room 218.
Wei Xingsi opened the PPT file summarized by Xu Qiu on the computer and began to check it carefully, and sometimes discussed a few words with Xu Qiu. After a few minutes, he nodded with satisfaction: "Overall, I think the plan is very good."
"But..." Wei Xingsi said, "Will this workload be a bit too much? At the same time, we need to explore in three directions and design so many molecular structures."
Xu Qiugang wanted to explain, and Wei Xingsi continued: "Chen Wanqing and Han Jiaying both have their own jobs to be busy now, or should I assign the new postdoc Wu Shengnan to you?"
"So..." Xu Qiu wanted to say "This is not so good, it's a postdoc", but he changed his words: "Teacher, please ask Wu Shengnan's opinion. She still has calcium titanium. The work of mining quantum dots..."
"Perovskite quantum dots do not matter. At that time, it was originally the research direction that came up when I bought TRPL. It is not easy to come up with results in a new field. I guess she may not be willing to do it. I will ask her in person. That's it." Wei Xingsi paused and said:
"By the way, in a while, I will go to Gong Yuanjiang to do an academic report. Then you will come with me. They have a lot of students. There may be a doctoral exchange student over there and work with them. To post a few articles, this was also the condition negotiated when the heating type homogenizer was accepted."
"Okay." Xu Qiu nodded. In academic circles, there is usually an equivalent exchange, and PY has to pay a price.
However, this is a good thing for Xu Qiu. If Wu Shengnan can join, plus a doctoral exchange student, the number of organic photovoltaics will be expanded to five people, and it will be a big team.
Moreover, I look like a small boss in the group. While doing experiments on my own, I tell others about my ideas, and then let them help them realize it. It's very refreshing to think about it.
After confessing the matter, Wei Xingsi took out a can of coconut juice from the refrigerator, stuffed it to Xu Qiu, and said, "Go ahead and call Wu Shengnan for me by the way."
"Ms. Wei is looking for me, what's the matter?" Wu Shengnan asked when he got the news from Xu Qiu.
"Well...I am not very clear about the specifics. It seems to be adjusting your research direction." Xu Qiu drank a sip of coconut milk, thought about it and didn't elaborate. If he said it, Wu Shengnan would not be willing to come to Organic Photovoltaics. Bian, isn't he embarrassed?
"That's it." Wu Shengnan nodded, seemingly enlightened, and got up and went to 218.
Seeing Wu Shengnan, Wei Xingsi straightforwardly said: "Xu Qiu's development of non-fullerene materials in the organic photovoltaic field is relatively short of manpower. I mean you will help him in the past."
Wu Shengnan was excited. This was exactly what she thought when she first came to the research group. She asked Xu Qiu to hold her thigh. No matter what the field, the choice is greater than the effort. If you follow the right person, you can get twice the result with half the effort. And her request is also very simple and rude. Post a few more good articles, and then find a better school to solve her associate professorship. If she spends two years in China after the postdoctoral degree, the associate professor will definitely be missing, at most one Lecturer, if there are several articles such as JACS, AM, etc., it will be different. There are opportunities to directly hire special associate professors.
Before that, Wu Shengnan had not found a suitable opportunity to discuss with Teacher Wei, but now it is Teacher Wei who offered to ask her. Although she was excited, she didn't show it on her face, and said with restraint, "Since it was Teacher Wei's arrangement, I accept it."
"That's OK," Wei Xingsi was not surprised, and said lightly: "The field of perovskite quantum dots can be slowed down first. While you are working with the two articles at hand, you can help Xu Qiu to start experiments and make various synthesis reactions. Get familiar first.
Then Teacher Wei added: "You have also seen that the non-fullerene field is gaining momentum now, and it is much easier to post articles than your fluorescent materials. Post more articles here, and then find a better school, directly Solving the associate professor is not a problem."
Back at 216, Wu Shengnan found Xu Qiu and said, "From now on, I will be yours."
Xu Qiu almost squirted out a mouthful of coconut juice, meaning that he understood in seconds. Wu Shengnan should agree with Teacher Wei's proposal, but this expression...
Fortunately, Han Jiaying went to Zhangjiang to synthesize. She hasn’t come back yet. Otherwise, she will spend some time to explain~EbookFREE.me~Xu Qiu thought about it and arranged a conjugate structure based on BDT nuclear unit for Wu Shengnan Synthesis, let her get acquainted with several common synthesis methods. Before the postdoctoral sisters mainly did polymerization reactions. Stille, Suzuki and the like did not have much synthesis of small molecules, especially low-temperature reactions involving n-butyllithium. Have not been in contact.
Xu Qiu used his post-doctorate sister to come, and he didn’t have too much psychological pressure. After all, there are experts in any field. There are also doctoral supervisors in their 20s. He feels that he can use his current understanding in the field of organic photovoltaics. , There is still some ability to guide them.
That is, perovskite quantum dots are really like a hot potato, and it won’t take long for anyone to take over...
PS: Unknowingly it is the last day of 2020, a total of 20.3W words have been updated this month, and the current order is 860, and the next month will continue to refuel, set a small goal, and exceed 1,000!
PS2: Book friends who like this book, please come to the starting point webpage or APP to subscribe, support genuine...
PS3: Expect a wave of monthly tickets for the beginning of January. It is said that there will be a double monthly ticket event for seven consecutive days...