Chapter 223: Eat me 1 backstab of justice

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On a new day, Xu Qiu made an appointment with the school girl for early training, and then took the school bus ahead of time to Zhangjiang.
Today is Friday, and the two of them did not spend too long in the office, so they prepared to enter the laboratory.
After all, what is being carried out is an organic synthesis experiment, and many of the experimental steps involved cannot be stopped once they start, and must be done bitterly.
For example, after passing a column, it is impossible to stop halfway through and wait a few days before continuing;
Another example is the post-reaction treatment, the treatment should be started, at least until the crude product comes out.
If you don’t move swiftly, the evening date between the two will be ruined
This is their first official date.
Xu Qiu was in charge of the 24-hour halo reaction he cast yesterday, and now the reaction time has almost come.
Such a very long response is generally not strictly accurate to minutes and seconds in actual operation, and even hours-level errors are allowed.
Time is mainly a reference, and the main basis is to see whether the reactants have reacted completely.
Xu Qiu walked to the fume hood and did not rush to turn off the high-pressure mercury lamp for lighting. He dipped a small amount of the solution in the reaction flask with a capillary tube, matched the prepared raw material solution, and used the cross-point plate method to light a plate. .
A few minutes later, when Xu Qiu saw the result, he couldn't help shouting, "Fuck."
"Brother, what's the matter? I didn't know how to experiment and failed, right?" Han Jiaying said in a concerned tone. As soon as she finished speaking, she put down her work and hurriedly walked to Xu Qiu's side.
"No, on the contrary, the yield of this reaction is very high." Seeing the school girl walking over, Xu Qiu turned on the UV lamp, pointed to the silica gel plate, and said, "Look at the sample point of the raw material in the product, which is almost shallow. I can't see it, but the product point, several other by-products, all disappeared overnight, leaving only a very dark main product."
"Um..." Han Jiaying nodded, "Indeed, this yield rate is estimated to be around 90%."
"Almost," Xu Qiu smiled, "Maybe it was a failed reaction yesterday, and a wave of character was collected. Let's transfer today."
"Then I will go to work." Seeing that there is nothing wrong with him, Han Jiaying didn't stay much.
Today, her task is also very arduous. Previously, a new batch of PDI monobromide substitution products were synthesized, and several of them were still in the sample mixing stage. Today, they are all separated and purified, which is regarded as an aid for Xu Qiu;
She has to complete the categories she is responsible for in the second part of the overview, and hand them over to Xu Qiu for integration.
"Go." Xu Qiu raised his hand and shook it. Originally, he wanted to kill the school girl, but when he thought he was still wearing a few layers of gloves in his hand and didn't know what medicine he had been on, he stopped in time. The car, there are many restrictions in the laboratory, it is not a good place to talk about love.
After the school girl left, he stared at the silicone plate on the experimental platform and fell into thinking.
In the present photocyclization reaction, except for the fused ring at the central nuclear unit, there is no other reaction site. The main product must be the fused ring structure we need.
There are no by-products in the product, and the difficulty of separation and purification is not high.
Moreover, the yield is also very high, and the final product yield may be more than 50 mg.
If nothing else, it can be considered a great success in the experiment.
if it is like this……
You can change the experiment path.
Take 15 mg back to Handan for the experiment like last time, and save the remaining product for the next step of optimization.
As long as the final product of the next step is more than 15 mg, it is enough.
Well, the plan works.
After planning the experimental path, Xu Qiu turned off the high-pressure mercury lamp and started post-reaction processing.
Because the room is also illuminated by fluorescent lamps, it can also provide energy for the photocyclic reaction, so even if the high-pressure mercury lamp is turned off, the reaction is still in progress.
To completely shut down the reaction, the iodine elemental catalyst in the reaction flask must be removed.
More than that, the iodine element is soluble in toluene solvent. If it is not removed, it will be mixed in the product, which may affect the subsequent separation and purification steps.
Before the crude product is applied to the silica gel column, it is better to ensure that there are not too many weird things in it.
As for the method of removing the elemental iodine, Xu Qiu checked the information in advance and had already remembered it.
He first prepared a saturated aqueous sodium sulfite solution, then added it to the reaction flask and shook it slightly.
The elemental iodine, sodium sulfite, and water will react, and the resulting products sodium sulfate and hydrogen iodide will dissolve in water.
Then, the organic phase (toluene) and the water phase were separated with a separatory funnel, washed three times with a saturated aqueous sodium sulfite solution to ensure no residual iodine, and then separated to obtain a toluene solution of the product.
Then according to the expected product of 50 mg, add the silica gel powder of the corresponding quality and mix.
Finally, the solvent is evaporated.
The solvent used for this rotary steaming is toluene, which has a boiling point of around 110 degrees Celsius, which is higher than water, so it is not so easy to spin dry.
If not handled properly, the final product will be a sticky oily liquid.
Decompression is necessary, and warming is also necessary.
Xu Qiu raised the temperature of the water bath next to the rotary steaming instrument to 80 degrees Celsius, and heated the eggplant-shaped bottle that was slowly rotating. In conjunction with the water pump, the pressure was reduced and pumped for more than an hour.
Finally, a dry, sample-mixed product is obtained.
Midway, Chen Wanqing arrived at the laboratory. For some reason, she arrived half an hour later than usual.
She greeted Xu Qiu and the others, chatted a few words, and started their own experimental work.
...
In the afternoon, Xu Qiu used liquid chromatograph to complete the separation and purification of PDI3-B-5X photocyclization reaction products.
Because there are not many samples, it did not take much time. In the end, a total of about 55 mg of product was obtained, which was still a red powdery solid, with a yield of 88%.
The new product obtained is named PDI3-BX-5, where PDI3 stands for 3 PDI molecules, B stands for benzene ring, X stands for fused ring connection, 5 stands for the side chain on the nitrogen atom of PDI molecule is a symmetrical dendritic structure, Each branch is an alkyl group of 5 carbon atoms.
Xu Qiu copied the new material into the simulation laboratory, and immediately arranged the model demonstrators to start exploring the device performance.
Then I returned to the office and started writing. The task was to integrate the second part of the review.
He had already received the part that Han Jiaying was in charge of at noon. The school girl didn't lie to him yesterday, saying that it was almost completed. It was just a little bit, not a billion dots.
I looked at it roughly and found that the part of the school sister was changed, but it was much better than the school sister.
Nevertheless, it is a time-consuming and laborious task.
It wasn't until after five o'clock in the afternoon that the work could be completed.
"Finally got it done." Xu Qiu pressed Ctrl+S to save the file, and then pressed WIN+L to lock the computer screen. He took a long breath and shook his head.
Staring at the screen for a long time makes me a little confused. Compared to writing articles, he still prefers to experiment.
Looking around, he was the only one in the office.
I vaguely remember that Chen Wanqing completed the experiment at about 4:40, because it was Friday that he took the school bus back to Handan in advance.
Han Jiaying had no impression, and she should still be working in the laboratory.
Xu Qiu lifted his pants, feeling that his bladder was exploding, so he went to the bathroom in the corridor.
The Zhangjiang Microelectronics Building was built in recent years, so the bathroom is very luxuriously decorated, and it is cleaned regularly every day. The area is dozens of square meters, and the tiles are bright and bright.
There are six pits in the men's toilet and the women's toilet...I don't know, I haven't been.
However, there is only one research group for Teacher Wei on the entire floor, and only Xu Qiu and the others are active. There are three or two big cats and kittens, which is really a waste.
After solving the physiological problems, Xu Qiu walked back to the A502 laboratory.
When he walked to the door of the laboratory, he suddenly had an idea, slowed down, quietly put on a clean lab coat, and then glanced at Han Jiaying's location.
She was sitting next to the liquid chromatograph, staring at the computer screen, her body curled up slightly, seemingly tired.
The direction facing the two of them is exactly 90 degrees. Although they are not facing their backs, there is still room for manipulation.
Xu Qiu tiptoedly moved towards the target, and the vibration of surrounding equipment covered his footsteps.
Soon he came behind the school girl.
The target does not seem to be alert, good opportunity!
"Take me a righteous backstab!" Xu Qiu opened his hands and embraced the school girl, then put his head on her hair.
"Ah, I was hit." Han Jiaying smiled and deliberately cooperated.
"When did you find out..." Xu Qiu looked up and saw his image on the glass, "It turns out that it is."
Han Jiaying moved her head and motioned Xu Qiu to look at the computer screen, "Brother, it’s going to be a little later today. This sample has just started, but it’s the last sample. This week, I will replace the three main PDI raw materials with monobromine substitutes. Both have prepared more than 2 grams."
"Nice work," Xu Qiu smiled and couldn't help holding the school girl in her arms tighter.
"Ah...Senior brother, take it easy, I'm almost out of breath..."
‘What kind of words about tiger and wolf,’ Xu Qiu hurriedly reduced his strength, thinking to himself, ‘this way, for a long period of time, there is no need to worry about the lack of basic raw materials.’
'Three main PDI raw materials ~EbookFREE.me~ to achieve the step of bromine substitution, and then obtain pure monobromine substitution, it needs six columns, and they are all products in large quantities, the experimental pressure is still not small . ’
‘I’ve been working on my own affairs these days, basically I didn’t help her, and I didn’t ask too much about the progress of her experiment. I only knew that she was progressing well. I didn’t expect to give me such a surprise now. ’
"By the way, I want to ask about the date tonight. I originally planned to return to Handan after the experiment. Now my plan has changed..."
"Wait when we return to Handan, or should we find a place in Zhang Jiang?"
"Um..." Han Jiaying thought for a while and said: "Go back to Handan, we are more familiar with it over there."
Next, the two interacted and cooperated tacitly. It took more than an hour to complete the experiment.
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