Chapter 243: Identity swap

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At 8:30 in the morning, on the school bus, Xu Qiu and Han Jiaying were sitting side by side, chatting in whispers.
Due to the difference in the division of labor in the experiment, they are usually separated in two campuses, gathering less and more, and the rare time together, which they cherish very much.
However, compared to real couples in different places, the situation is much better, at least every morning and evening, Xu Qiu and Han Jiaying can get together.
Forty minutes later, the school bus slowly drove into the Zhangjiang campus.
It is still slightly affected by the aftermath of the rush hour. If it is a school bus at 9 or 10 in the morning, it will only take half an hour to arrive.
After getting off the car, they first went to the drug warehouse to collect 5 fusiform PTFE stirrers, 10 packs of disposable PE gloves, 4 boxes of disposable latex gloves, and a pack of 19-mouth rubber plugs, and then they held these experiments. Consumables, go to the Microelectronics Building.
Entering the A501 room, putting down the experimental consumables, Han Jiaying asked at will:
"Brother came here today, mainly for the microwave reactor."
"No." Xu Qiu shook his head.
"Um..." Han Jiaying tilted her head and asked curiously:
"There are other things, why don't I know if I want to react or..."
"Mainly to see you." Xu Qiurou said.
"Ah~" Han Jiaying whispered, blushing and whispered: "Senior brother, what about today..."
The atmosphere in the house instantly turned pink...
However, this atmosphere did not last long.
A few minutes later, Chen Wanqing suddenly opened the door and came in. Seeing a scene in the room, she sighed softly, "Hey, I just ate breakfast and asked me to add a meal again. Excuse me."
After that, she pretended not to see anything, squinted and walked out, closed the door, and then reopened the door after three symbolic knocks.
At this time, Xu Qiu and Han Jiaying had returned to normal, and their clothes were barely tidy, but the school girl's face was still red.
The three of them did not mention what happened just now, and stared at each other for a while with big eyes and small eyes.
"What time do they come in this afternoon." Chen Wanqing took the initiative to break the silence.
Xu Qiu was stunned for a moment, and then realized that the senior sister was talking about the microwave reactor, and then responded: "It's about one o'clock. Teacher Wei sent me a message this morning."
Speaking of Xu Qiu, when he received the news, he was a little surprised. Teacher Wei was still thinking about the laboratory in the morning on the plane this afternoon, and he said, "After the instrument is installed, I will take a few photos. I will see it when I get off the plane.
"Hmm..." Chen Wanqing thought for a while and said, "It's okay at one o'clock in the afternoon. I need to use pyridine for my reaction today. Just wait for the instrument to be installed and you can vote after the reaction is handled."
"Is it the synthesis of CH1, the final product of A-D-A material, under the new route?" Xu Qiu asked.
"Yes." Chen Wanqing nodded gently.
"Senior sister's progress is very fast." Xu Qiu casually admired.
"After all, the reaction steps have been reduced so much." Chen Wanqing smiled.
"Then I have to speed up the progress. Today I have to vote for two reactions and have to pass two pillars," Han Jiaying interjected, then turned to look at Xu Qiu and tentatively said, "Brother, come and help me?"
"Okay, let me help you react." Xu Qiu agreed without hesitation. After all, he has come. He really has nothing else to do, so he can't paddle for a day.
"Great," Han Jiaying chuckled and continued: "The two reactions today are the borate reactions of B4T and B3T."
"If you remember correctly, this reaction is the second step in the entire reaction chain, right?" Xu Qiu touched his chin, and said in a weird tone: "It's Thursday today. Did you fish a few days ago?"
"Of course not," Han Jiaying shook her head hurriedly and explained: "The two reactions of the column to be passed today are my second-generation 3D-PDI final product, and the estimated yield is more than 200 mg."
"As for today's batch of reactions..." After a pause, Han Jiaying continued: "My idea is that when the third generation of 3D-PDI materials are developed later, borated B4T and B3T units will also be needed, so I plan to synthesize more Some prepared."
"I understand," Xu Qiu smiled and said: "It just so happens that this is still a new reaction to me. Then we will exchange identities this time. You can teach me."
"Alright." Han Jiaying raised her eyebrows, seeming to be very happy. She opened the experiment log, turned to the experiment record a few days ago, and copied the experiment conditions onto the sticky note. Because it is a previously successfully synthesized reaction, there is no need to recalculate the product feed ratio.
Chen Wanqing looked at the figures of Xu Qiu and Han Jiaying in the house, her mouth narrowed.
She had read all the recent articles in the field of organic photovoltaics and she had nothing else to do, so she silently put on the headphones, began to follow the drama, and digested it by the way.
If you don’t need to write a summary, there is still a lot of free time for synthesis in Zhangjiang, compared to doing devices in Handan.
However, it is really busy when doing organic synthesis. After the small molecule reaction is processed and the column is added, continuous operation for three or four hours is commonplace; when making devices, it is rarely continuous operation, cleaning the substrate, annealing, and evaporation. There are plenty of spaces to rest.
Xu Qiu and Han Jiaying prepared for the experiment and entered the A502 laboratory together.
The school girl, in the role of a mentor, began to explain:
"The raw materials are B4TB3T and pinacol diboronic acid, the catalyst is a metal iridium catalyst, di-tert-butyl bipyridine, and the solvent is n-heptane..."
"The reaction temperature is 120 degrees Celsius, and the reaction time is 24 hours. The reaction process needs to be anhydrous and oxygen-free, protected with a nitrogen ball..."
"...The above are all the precautions." Han Jiaying crossed her arms, and said with an old manner: "You have passed away, brother."
"You've lost your studies, you won't be able to become a mentor at your level." Xu Qiu said in cooperation.
It's been a long time since he was instructed by other people to do experiments, and he experienced it again today, especially when the instructor is still a school girl, it really has a strange feeling.
The two looked at each other for a few seconds, and both laughed.
After a while, Xu Qiu stretched out his hand and patted Han Jiaying on the shoulder, and said, "I'm too addicted to being a teacher, go to purify the product, today I have a lot of experimental work." It didn't take long for him to put on his gloves. I haven't touched anything in the laboratory, so it is clean, and there is a layer of lab coat.
"Yeah, good~" Han Jiaying nodded and ran away happily.
Xu Qiu transferred the medicines needed from the reagent cabinet and refrigerator to the fume hood.
The raw materials and products of this reaction are not the same as the previously synthesized PDI series molecular structure, so the properties will be quite different.
However, this is not a big problem for him. When he designed the reaction, he consulted a lot of literature about the introduction of borate, but the molecular structure he designed later was relatively simple, and he can directly buy the corresponding commercialization. The raw materials are not synthesized by themselves.
Xu Qiu glanced at the catalyst bottles. One of them was marked {Ir(OMe)Cod}2, which had a complicated structure and was a coordination compound of iridium. COD was the brand name; the other was di-tert-butyl bipyridine, abbreviated dtbpy, functionally, he guessed that it was something like a ligand, and it was also part of the catalyst.
This combination is a bit like the metal palladium catalyst used in the previous Stille and Suzuki reactions.
In fact, many transition metal elements on the periodic table have good reaction catalytic performance.
Xu Qiu continued to look at several other reagents.
The molecular structure of pinacol diboronic acid is quite interesting. Two boronic acid ester units are connected together head-to-head.
In his mind, his brain instantly compensated for the situation during the reaction. One unit of boronic acid ester unit combined with a reaction site on B3TB4T, and the other boronic acid ester unit fell off. In order to obtain tri-substituted and tetra-substituted products, obviously, this group Excess points.
Xu Qiu glanced at the school girl's post-it note, and it was indeed consistent with his own speculation.
The last is the solvent, n-heptane, which is not a commonly used solvent.
He roughly remembered that the common solvents used in the reaction of introducing boric acid esters are DMF, DMSO, dioxane, and methyl tert-butyl ether, but he didn't mean to replace it. The school girl has already figured out the conditions and just use it directly. .
When Xu Qiu used n-heptane solvent for the first time, he simply read the MSDS manual and found that its boiling point is close to 100 degrees Celsius. Steam has anesthesia and irritation. Acute inhalation of steam can cause dizziness, nausea, anorexia, and "euphoria." And staggering gait, even loss of consciousness and stupor.
The "euphoria" reminded him of gasoline. Speaking of it, he always felt that gasoline smells good, and the main component of gasoline is a mixture of aliphatic hydrocarbons and cycloalkanes between five to twelve carbons, n-heptane. Alkanes are straight-chain saturated aliphatic hydrocarbons with seven carbon atoms.
Is it possible that heptane is at work?
After confirming all the reagents, Xu Qiu started the experiment.
Redistill the solvent, n-heptane.
Prepare a clean two-necked flask, magnetic stir bar, condenser, and use a three-way valve and balloon to make a nitrogen balloon.
In a round-bottom flask, add {Ir(OMe)Cod}2, di-tert-butyl bipyridine, pinacol diboronic acid, and n-heptane solvent in proportion, and stir vigorously until deep red as the catalyst stock solution.
Mix the B3TB4T raw material and the catalyst stock solution in proportion ~EbookFREE.me~ and transfer to the reaction flask, connect the nitrogen ball, condenser tube, three pumps and three rows, connect the condensed water, and quickly heat up to 120 degrees Celsius, and cover the outside of the reaction flask Aluminum foil.
Get it done, call it a day.
For the two reactions, the first three steps are the same, only the fourth step is different, which saves a lot of time.
It took less than an hour to finish the reaction. Xu Qiu turned to look at Han Jiaying and saw that she was still passing the first pillar, but it was close to the end, so he walked over and helped her to steam the product.
Before lunch, the two successfully completed today's experimental work and gained a lot.
The elder sister also gained a lot, but it was in the spiritual world.
She chased two episodes of dramas that promoted the main melody in the morning, and felt that the whole person was sublimated a lot.
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