Chapter 100: Hit the experiment?

　　 The BT and 2FBT units in this reaction have 12-carbon alkyl branches on each side of the thiophene unit.
　　 This branched chain is not a long straight chain, but a dendritic with 4 carbons on one side and 6 carbons on the other side, which is 2-butyloctyl, abbreviated as 2BO.
　　 Since the solubility is not enough, lengthen the branch chain.
　　 Xu Qiu checked a bunch of monomers he had bought before.
　　 2FBT unit, only one monomer has a longer carbon chain branch, is 2-hexyldecyl, abbreviated as 2HD.
　　 He decided to take this to try the water first, if it doesn't work, then think of other ways.
　　 After that, I still have to synthesize the monomers myself. If I always count on others, many experimental ideas cannot be verified.
　　 But compared to the polymerization reaction, the monomer synthesis is more complicated, and the operation of adding fluorine atoms is involved, which is more dangerous than the previous Soxhlet extraction with chloroform.
　　 If fluorosis is poisoned, fluorine will be deposited on the teeth and bones, forming dental fluorosis and skeletal fluorosis, and it is difficult to cure.
　　……
　　 After Xu Qiu planned the next experiment plan, he came to the laboratory and added another blocking agent to the five reaction vessels.
　　 Around ten in the morning, Chen Wanqing also took the school bus to the Zhang Jiang laboratory.
As soon as 　　 entered the door, she asked:
　　 "How about the experiment?"
　　 "With 12 hours of reaction time, four of the five groups of reactions have precipitated a large amount of solid polymer," Xu Qiu said:
　　 "I shut them all down, and now the second step of capping is going on."
　　 "Is there a response that failed? Isn't it mine?" Chen Wanqing said.
　　 "You will know if you go and see for yourself." Xu Qiu was noncommittal.
　　 Without wearing protective measures, she went straight to the fume hood, took a long look, and walked back.
　　 "It turned out to be the response of the 3:7 ratio I voted." Chen Wanqing said with some chagrin:
　　 "When I added the monomer raw materials, I felt something was wrong. It seemed that I had confused two of the three raw materials, but I was not sure.
　　 With a hint of luck, I continued the experiment. If I was a bit decisive at that time, I would throw them all away and re-cast and react again. "
　　 "Just make up one more today." Xu Qiu said.
　　 Immediately, he told the senior sister about the problems he encountered in the morning and the analysis process.
　　 Chen Wanqing thought for a moment and asked:
　　 "In other words, you now want a 2FBT monomer with a longer side chain, but you didn't buy it before?"
　　 "The main reason is that their company's product catalog is not written, and you can't buy it if you want." Xu Qiu said:
　　" The existing side chains of 14 carbons and 18 carbon atoms, 2BO and 2HD, 2BO are made in this batch, which is not very good. For 2HD, I plan to react in the next batch, but I think it may not be the best.
　　 It should be better if it can have 2FBT monomer with longer side chain.
"For example, 22 carbons, 2-octyldodecyl, 2-OD, or 26 carbons, 2-decyltetradecyl, 2-DT. "
　　 "Okay, let me help you ask about their sales," Chen Wanqing said:
　　 "It's just such a long side chain, and the average researcher will not use it, and their company may not have it in stock, and may have to customize it."
　　 Xu Qiu nodded to express understanding, and said, "If it is out of stock, I will think of other ways."
　　 The blocking reaction will take some time, and the two returned to A501.
　　 Chen Wanqing uses QQ to contact sales:
　　"May I ask the dibromo 2FBT monomer with two thiophenes next to it. Is there any longer branch on the thiophene, such as 22 or 26 carbons"
　　 "That's it"
　　 "[picture]"
　　 A few minutes later, the salesperson replied:
　　 "Yes, someone asked us to order these two monomers just a few days ago"
　　 "How much do you want?"
　　 Xu Qiu and Chen Wanqing were surprised when they saw the first news.
　　 You have to know that the monomer unit with such a long side chain is considered to be an unpopular material, but it is obviously abnormal if someone asks their company to customize it.
　　 Could it be that you collided with other researchers?
　　 "Would you like to ask who he asked him to make?" Chen Wanqing asked.
　　 Xu Qiu was waiting to nod, and saw the phone screen, sales quickly withdrew the two previous news.
　　 then he resent:
　　 "Yes, how much do you want?"
　　 It seems that this sales is also aware of the leak, after all, this situation is already a leak of customer privacy.
　　 Xu Qiu pondered, and if asked for the details, he would definitely not say it, and it would embarrass the other party.
　　 So, he said to the senior sister: "Ask the price first."
　　Chen Wanqing sent a message:
　　"What are the prices of the two materials, 200 mg and 500 mg, respectively"
　　 received a reply soon:
　　 "The prices are the same, they are all 1,000 yuan for 200 mg, 2,000 yuan for 500 mg, and 3500 yuan for 1 gram.
　　 She turned her head and said, "200 or 500? Our budget is running out."
　　 "Buy 200 mg first, it's enough for two or three shots," Xu Qiu said:
　　 "Look at the situation later and buy whichever is needed. It can also help Teacher Wei save some money."
　　 Chen Wanqing replied to the message:
　　 "Buy 200 mg for each of the two, the same as before. After that, our school drug warehouse will contact you, and the invoice and drugs can be sent to the drug warehouse."
"okay, got it"
After 　　 negotiated with the sales, she placed an order on the school’s hazardous chemicals website.
After 　　 was all set, the two looked at each other and Xu Qiu said:
"It seems that I have to hurry up. There is a high probability that I will run into experiments with others, and their progress may be about the same as ours, or faster than us~EbookFREE.me~ It is estimated that it is, at the time PTB7-TH The donor material turned out to be a big success, attracting a large number of researchers to study the derivative system based on it," Chen Wanqing said:
　　 "But there will still be some researchers who will study the new system. The structure of PBT4T is not too complicated, and it is possible to be seen by others."
　　……
　　The end capping reaction is complete.
　　 The two of them dropped the solution in their respective reaction flasks into methanol, the product precipitated, and the product was filtered.
　　Xu Qiu’s two systems, the products of PBT4T look normal.
　　 Most of the products of P2FBT4T are precipitated during the reaction, and there are very few products remaining in the solution, and the solubility is worrying.
　　 Chen Wanqing's system, two are normal.
　　 Another failed reaction, when the solution was dropped into methanol, the product directly turned into a pile of slag.
　　 This also gave her some bad memories.
　　 However, she changed her mind. Since Xu Qiu came to the laboratory, she has been transported.
　　 Although various situations occasionally occur during the experiment, it is generally smooth.
　　 Two articles were also voted out. If the current system yields results, there will be three second-division articles, which is quite a lot.
　　 has reached the threshold for graduation in the second year of Ph.D.
　　 Is he also an experimental genius, but he has not found it before?
　　 After Xu Qiu processed his own products, he glanced at Chen Wanqing who was smirking at the fume hood, and shouted:
　　 "Senior sister, your saliva is coming out."
　　 "Ah, what did you just say?"
　　 "I said, it's time for lunch."
　　 "Oh, okay, I'll fix it right away."