I Have a Research Support System

The BT and 2FBT units in this reaction have 12-carbon alkyl branched chains on the thiophene units on both sides.

This kind of branched chain is not a long straight chain, but a dendritic structure with 4 carbons on one side and 6 carbons on the other side, that is, 2-butyloctyl, referred to as 2BO.

Since the solubility is not enough, lengthen the length of the branched chain.

Xu Qiu checked a bunch of monomers he bought earlier.

The 2FBT unit, only one monomer with a longer carbon chain branch, is 2-hexyldecyl, abbreviated as 2HD.

He decided to test the waters with this first, and if it didn't work, he would think of other ways.

After that, I still have to synthesize monomers by myself. If I always rely on others, many experimental ideas cannot be verified.

It’s just that compared to the polymerization reaction, the monomer synthesis is more complicated, and it involves the operation of adding fluorine atoms, which is more dangerous than the previous Soxhlet extraction with chloroform.

If fluorosis, 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 containers.

At about ten o'clock in the morning, Chen Wanqing also arrived at Zhang Jiang's laboratory by school bus.

As soon as she entered the door, she asked:

"How about the experiment?"

"After 12 hours of reaction time, four of the five groups of reactions precipitated a large amount of solid polymer," Xu Qiu said:

"I turned them all off, and now I'm doing the second capping reaction."

"Did one of the reactions fail? Could it be mine?" Chen Wanqing said.

"Go and see for yourself and you will know." Xu Qiu was noncommittal.

She didn't wear protective measures, so she went straight to the fume hood, took a look at it from a distance, and walked back.

"Sure enough, it's the 3:7 ratio I voted for." Chen Wanqing said a little annoyed:

"When I added the monomer ingredients, I felt something was wrong, as if I mixed up two of the three ingredients, but I was not sure.

With a little bit of luck, I continued the experiment. If I had been more decisive at the time, I would have thrown them all away and voted again. "

"Just make up another one today." Xu Qiu said.

Immediately, he told his senior sister about the problems he encountered in the morning and the analysis process.

Chen Wanqing thought for a moment and asked:

"That is to say, you now want 2FBT monomers with longer side chains, but you didn't buy them before?"

"The main reason is that their company's product catalog didn't mention it, and they couldn't buy it if they wanted to." Xu Qiu said:

"The existing side chains with 14 carbons and 18 carbon atoms, 2BO and 2HD, 2BO was made in this batch, but it is not very good. For 2HD, I plan to submit the reaction in the next batch, but I think it may not be the best.

It should be better if there is a 2FBT monomer with a longer side chain.

For example, 22 carbons, 2-octyldodecyl, 2-OD, or 26 carbons, 2-decyltetradecyl, 2-DT. "

"Okay, then I'll help you to ask about their sales," Chen Wanqing said:

"It's just that such a long side chain is not used by ordinary researchers, and their company may not have it in stock, and may have to be customized."

Xu Qiu nodded to express his understanding, and said, "If it's out of stock, I'll think of other ways."

It will take some time for the capping reaction, and the two returned to A501.

Chen Wanqing uses QQ to contact sales:

"May I ask if there are two dibromo-2FBT monomers next to thiophene, are there any longer branched chains on the thiophene, such as those with 22 or 26 carbons?"

"That's it"

"[picture]"

A few minutes later, the salesman replied:

"Yes, just a few days ago someone asked us to order these two monomers"

"How much do you want?"

Xu Qiu and Chen Wanqing were shocked when they saw the first message.

You must know that a monomer unit with such a long side chain is considered an unpopular material, but someone asks their company to order it, which is obviously abnormal.

Could it be that he collided with other researchers?

"Do you want to ask him who ordered him?" Chen Wanqing asked.

Xu Qiu was waiting to nod when he saw on the phone screen that the salesman quickly withdrew the previous two messages.

Then he retweeted:

"Yes, how much do you want?"

It seems that the salesman also realized that he had slipped his mouth. After all, this situation is already a leak of customer privacy.

Xu Qiu thought about it, probably if he asked him about the details, he would definitely not talk about it, and it would embarrass the other party.

So, he said to his senior sister, "Ask the price first."

Chen Wanqing sent a message:

"What are the prices of the two materials, 200mg and 500mg respectively"

Received a reply soon:

"The price is the same, 1,000 yuan for 200 mg, 2,000 yuan for 500 mg, and 3,500 yuan for 1 gram."

She turned her head and said, "200 or 500? Our budget is running out."

"Let's buy 200mg first, enough for two or three shots," Xu Qiu said:

"Look at the situation later, and buy whichever you need, which can also save Teacher Wei some money."

Chen Wanqing replied:

"Buy 200 mg of each of the two, it is still the same as before, and our school drug warehouse will contact you later, and the invoice and drugs will be sent to the drug warehouse."

"Alright, I got it"

After negotiating with sales, she placed an order on the school's hazardous chemicals website.

After everything was done, 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 have collided with others, and their progress may be similar to ours, or faster than ours."

"Probably yes, when the donor material PTB7-TH was born, it attracted a large number of researchers to study derivative systems based on it," Chen Wanqing said:

"But there will still be some researchers who will study new systems. The structure of PBT4T is not too complicated, and it is possible for others to see it."

...

The capping reaction is complete.

The two people dropped the solutions in their respective reaction bottles into methanol, and the product was precipitated, and the product was filtered.

In Xu Qiu's two systems, the product of PBT4T looks relatively normal.

However, most of the products of P2FBT4T are precipitated during the reaction process, and there are very few products remaining in the solution, so the solubility is worrying.

In Chen Wanqing's system, the two are normal.

Another failed reaction, when the solution was dropped into methanol, the product directly turned into a pile of slag.

It also brought back some bad memories for her.

However, she changed her mind, ever since Xu Qiu came to the laboratory, her luck has changed.

Although various situations occasionally appeared during the experiment, it was generally smooth.

Two articles were also submitted. If this system produces results again, it will be three articles in the second district, which is not a lot.

In the second year of Ph.D., the threshold for school graduation has been reached.

Could it be that he is also an experimental genius, but he has never discovered it before?

After Xu Qiu finished disposing of his products, he glanced at Chen Wanqing who was smirking at the fume hood, and shouted:

"Sister, your saliva is coming out."

"Ah, what did you just say?"

"I said, it's time for lunch."

"Oh, all right, I'll fix it right away."