Chapter 250: Probably, this is someone else’s child

"Wow, sister, the efficiency of the CH2 system device is 2.33%." In the laboratory, Han Jiaying said with excitement.
"It seems that this system is promising," Chen Wanqing was also very bright looking at the JV curve displayed on the computer, but she thought about the result that Xu Qiu and Han Jiaying both broke 7% efficiency, and sighed lightly. It’s still incomparable with your system."
"That's not the same," Han Jiaying comforted: "Our 3D-PDI system has been iterated three or four times, and the older sister's is still the original structure. If you continue to iterate according to the design ideas behind, you might catch it someday. Coming up."
"Who knows the future, let's focus on the present." Chen Wanqing looked at the CH1 device in the glove box that had not been tested, and said expectantly: "Let's test another CH1 device and see if there is a chance of exceeding 3%. Right."
　　 "Okay." After Han Jiaying responded, she quickly switched a CH1 device in her hand and started testing.
　　 "0.21%……"
　　"Could this point be broken, try another point?" Seeing this result, Chen Wanqing seemed to understand something, but still did not give up the struggle.
　　 "0.19%……"
　　 "Um...Is this device broken, try another device." Chen Wanqing still had a fluke.
　　 "0.05%..."
　　 "Well, no need to try, it's a matter of materials." Chen Wanqing said dejectedly.
　　 But she didn't feel depressed for too long, and quickly regrouped, "At least the performance of CH2 is not bad."
　　 After spending some time, Han Jiaying finished testing all the devices.
　　 Among them, her and Xu Qiu's system did not break new highs, and the highest value of the school sister's system reached 2.56%.
　　 After copying the data and returning to the office, Han Jiaying reported to Xu Qiu: "Senior sister’s CH2 system is up to 2.5%."
　　 Seeing that Xu Qiu had no special reaction, she tilted her head and said in doubt: "Brother, you don't seem to be surprised at all."
　　 If it were normal, Xu Qiu would definitely pretend that he didn't know the result, but he just focused on writing the article, but he didn't react for a while.
　　This is the end of the matter. It would be too fake to make a whale-eating appearance. His reflection fox is not that long.
　　 Xu Qiu pondered for a moment, and made a plan, pretending to be profound: "Actually, the old man watched the stars last night and made a calculation. He has already calculated the results of today's experiment."
　　Han Jiaying chuckled: "Then how efficient is the senior sister CH1 system?"
　　 "Less than 1%." Xu Qiu calmly said, her expression was rather like a half immortal.
　　 "It's really less than 1%, and the highest is only 0.25%..." Han Jiaying was a little confused, "How did the brother know? I can't really calculate it."
Xu Qiu was about to release the big huyou technique on the school girl, but Chen Wanqing took the lead. She assuredly said: "Don’t listen to Xu Qiu Huyou, he must have inferred from your expression and words just now, if the CH1 system works well. , You won’t only mention CH2 and not CH1."
　　 "Hmm...it seems reasonable." Han Jiaying nodded, but she always felt something was wrong.
　　 Listening to the elder sister's rigorous inference, Xu Qiu smashed his mouth. If he didn't know the truth, he would have believed it.
　　 At this time, Tian Qing suddenly appeared at the door of 216, "My friends, I'm back!"
Facing the doubtful eyes of everyone, Tian Qing took the initiative to explain: "Yesterday, my best friend and I went to Hangzhou next door to play for two days. I just took the high-speed train back. I haven't eaten dinner yet. I will slip away. If Teacher Wei asks What I did today, I said, "Processing TRPL data."
　　 "By the way, this is a gift for you." After saying that, Tian Qing put a few gift boxes in her hand on the desk, and then bounced around and left.
　　 "I actually went out to play for two days, my real name is envious," Wu Feifei sighed, and picked up a gift box casually, "I will open it."
　　 "I'll take it apart together." Duan Yun also leaned over.
　　Wu Feifei continued to take things out of the gift box, chanting like the name of the dish: "Fennel beans, small peach cakes, sweet-scented osmanthus cakes, mung bean cakes..."
　　Han Jiaying was instantly attracted by the food, "It's quite rich."
　　 There was the sound of tearing the packaging bag and joyous laughter in the laboratory.
　　 Around nine o'clock in the evening, Teacher Wei sent a "how" to Wu Feifei as usual.
　　 Everyone wrote a text summary like Friday, and finally summarized it to Feifei Wu.
　　 Wu Feifei helped Tian Qing cover her, and then reported everyone's work progress.
　　 It didn't take long for me to receive an elderly emoticon package from Teacher Wei again [OK].
　　 Speaking of it, Mr. Wei hasn't bothered Xu Qiu in the past few days. I think it's not time to give the report.
　　 After all, half of the work in Wei Xingsi's report is Xu Qiu, and he will definitely be ventilated with him before the formal report.
For such exchange visits abroad, most of the time is spent traveling at public expense, especially in the first few days. The host is definitely going to entertain visitors and wander around. Generally, important meetings and reports will be arranged after the schedule. halfway.
The 　　 mode is almost "two hours of lectures, one full week of play".
　　 Because there is no group meeting to be held next Monday, there is no need to prepare a group meeting PPT, but the experiment is still to be done.
　　 In order not to disturb other people's paddling, the organic trio went to the small meeting room on the third floor to discuss the experiment arrangements for next week.
Xu Qiu first spoke: "Next week, I will supplement the characterization test of the two best systems between me and Han Jiaying, and then do a few batches of devices, continue to optimize the efficiency, and write articles. Well, you can use any new materials. Give it to me, I'll help you make devices."
"My CH2 system does not need to be optimized for the time being, because I plan to develop the next-generation material CH3 based on CH2." Chen Wanqing paused, and further explained: "The specific idea is to use malononitrile and 1,3-indenedione The (IN) reaction replaces one ketone group on the original IN unit, thereby introducing two cyano groups to obtain I unit, which is used as the second generation A unit."
　　 Xu Qiu took a look at the reaction route. Compared with the original CH2, the new material I has only one step of malononitrile reaction, and the synthesis route is no problem.
　　 However, thinking of the toxicity of malononitrile, Xu Qiu hesitated and asked: "Mallonitrile...Senior sister made up his mind?"
Chen Wanqing nodded, "I have already bought the medicine. Although malononitrile is a highly toxic reagent, it is a solid at room temperature with a melting point of over 30 degrees Celsius. Compared with liquid volatile solvents, it is safer. An inhalant of isoamyl nitrite is also prepared, which can be used to treat acute cyanide poisoning."
　　 "That's good." Seeing that the senior sister was well prepared, Xu Qiu stopped talking and turned to look at the senior sister.

I plan to develop the third-generation 3D-PDI molecules based on B4T next week. The B3T system is temporarily put down because of its low efficiency.
Han Jiaying pointed to the synthetic route on the PPT and said:
Starting from the 6 series of simple PDI molecules, The first step is nitration..."
After seeing the reaction conditions, Xu Qiu interrupted: "I guess I can't directly apply my experimental conditions at the time in this step, nor can I use a microwave reactor, because there are two groups and four bay reaction sites on the simple PDI molecule. Yes, if the reaction conditions are too severe, it is easy to form dinitro substituents, just like the previous bromination reaction."
After thinking about it for a moment, Xu Qiu said,
If the reaction conditions are not good enough to replace fuming nitric acid, then you can try to lower the reaction temperature. The previous conditions were room temperature. Now try to make an ice water bath with zero degrees Celsius. "
　　 "Okay," Han Jiaying nodded, "I originally planned to separate mono- and di-substituted products like the previous bromination reaction. If the reaction can be controlled to mono-substitution, it would be better."
She created a new text box on the PPT, supplemented with Xu Qiu’s suggestion, and then said:
In the second step, the nitro mono-substituted PDI molecule reacts with selenium powder to obtain PDI-Se. The reaction conditions are the same as before. The NMP solvent , 190 degrees Celsius..."
Seeing that Xu Qiu did not raise any objections, Han Jiaying continued: "The third step is to react with liquid bromine to obtain PDI-Se-Br. This step has only one reaction site and the yield should not be low, and then it is substituted with borate. ki reaction, and finally fused cyclization reaction."
"The other steps are not a problem." Xu Qiu touched his chin and added: "The PDI used before is the 6 series, this time since starting from the beginning, you can also try the 5/8 series by the way~www. EbookFREE.me~Yes, brother's system is the 8 series with the highest efficiency." Han Jiaying nodded, patched the PPT again, and then looked at Xu Qiu eagerly, as if saying "I want more."
　　 Xu Qiu couldn't see what she was thinking, and smiled and waved his hand, "It’s gone, it’s gone, let’s follow this plan first."
After a while, Xu Qiu thought about the article and suddenly said: "Speaking of which, if you want to write the article first in the second-generation B4T system, after all, there is an efficiency of 7%. At this stage, 3D- When the concept of PDI has not been widely reported, you can try to vote for AM. Even if you fail to win AM, there is a chance to switch to it."
"Um..." Han Jiaying didn't think so much before, just doing the experiment first. Now I heard the senior brother say that there is a chance to play AM, I can't help but feel moved, "Then I will spend my free time for the experiment next week. Write an article."
Xu Qiu responded: "Okay, I will send you some of the data that I have initially processed before. By the way, I will also give you the NC template that I am writing now. Anyway, it is a 3D-PDI system, and the overall writing idea is also Almost, you can refer to it."
　　 "Good." Han Jiaying said happily.
　　 Chen Wanqing sat aside. Although her system has made a big breakthrough today, she still feels a little depressed looking at the two in front of her.
　　 How do you feel that the juniors and younger sisters are talking about AM, the top issue of materials, just like talking about Chinese cabbage in the market.
　　 Probably, this is someone else’s child.