The pleasure of basic research is to meet user interviews 】 【 curiosity

In 1945, physicists Zavoisky detection was proposed for the first electron paramagnetic resonance signal experimental methods, after more than 70 years of development, electron paramagnetic resonance (EPR) technology has been in many fields such as physics, chemistry, biology and medical gained more and more widely used.Electron paramagnetic resonance study in our country started earlier, lu jiaxi, QiuZuWen, xu and other professors in the field in our country, the development of a huge effort.Zhejiang university, professor xu since 1960 engaged in the study of electron paramagnetic resonance spectrum, is one of the pioneers in the field of research in our country.In order to promote the development of our country electron paramagnetic resonance, Mr Xu in zhejiang university education foundation established a special paramagnetic resonance development award fund.

Spin of south China university of technology institute of science and technology, professor jiang shang da in the use of electron paramagnetic resonance magnetic molecular quantum coherence technology research has made a creative contribution, won the 2021 annual "xu paramagnetic resonance spectroscopy excellent youth award.Recently, professor jiang shang da accepted the interview instrument information network of Shared his experience of scientific research and scientific research achievements, and his use of electron paramagnetic resonance instruments to carry out a series of work.

Dr Jiang shang da in stage mainly engaged in the research on the synthesis of single molecule magnet, but suffer from a lack of advanced characterization methods to study the electronic structure of magnetic molecules, so Dr Dr After graduation he didn't continue to stage more familiar, but choose the threshold is higher, difficulty bigger electron paramagnetic resonance technique as the main research contents of postdoctoral.

Jiang shang da so entered the paramagnetic resonance research field of study.Jiang teacher at first not familiar with the relevant knowledge, paramagnetic resonance spend a lot of time reading books of basis, find the original literature, consolidate the basic knowledge, then understanding structures, the basic principle and technical scheme of EPR spectrometer, and then to use commercial paramagnetic resonance instrument conducting scientific research.Paramagnetic resonance from frequency domain to domain to time domain, from "EPR small white" to "outstanding young expert", the relevant technology of the paramagnetic resonance, jiang is to be able to explain.And it is on the basis of the theoretical knowledge solid enough, it would not have been behind relatively "smooth" the road of scientific research.

But when he has clearly grasp the ensemble electron paramagnetic resonance wave after the related technology and research paradigm of jiang shang da to opt out again "comfort zone", continue to explore new research directions: light detection of single molecule paramagnetic resonance.Jiang shang da mentioned, now the research direction is based on several years of research work, has experienced the selected - overthrow - selected that is repeated again finally selected, the process of innovation of scientific research is not without foundation, is the need to through a lot of reading literature, long-term process of accumulation.This is a difficult road, but for jiang shang da is extremely attractive and full of fun.

When asked about his research achievements, the pride of the shang da jiang calls himself the little article, but when it comes to the tone of each article are proud.He Shared the published in NPJ Quantum Information on the job, he and his team members using fullerene molecules trigger pulse laser to triplet, and preparation for three on the triplet energy superposition state, and then observed novel Quantum phase interference phenomenon.Jiang shang da said, "this piece of work is more representative, because this is their team in the novel physical phenomena observed in many level magnetic molecules of the first piece of work.Unlike traditional quantum bit, magnetic molecules tend to have more control level, so a magnetic molecular state of Hilbert space is larger, more quantum phase, physical meaning is more rich, quantum expand sex is stronger, but the downside is poor quantum coherence.Jiang shang da team chemical molecular cage structure protection scheme can lengthen a good magnetic molecular quantum coherence time, typically molecules is embedded fullerenes.Such as jiang shang da team of researchers report Gd2 @ C79N molecules spin ground state as S = 15/2, its up to 5 microseconds and coherence time is the highest spin quantum coherent behavior could be observed.In addition, jiang shang da team also set up a family of five elements embedded in the synthesis of fullerene molecules and purification device, their preparation N @ C60 molecule concentration of up to 5000 PPM, coherence time at liquid nitrogen temperature has hundreds of microseconds, is currently the longest report the high spin coherence molecule (S = 3/2).Based on this kind of high spin molecules is longer than the quantum coherence time, jiang shang da team also found that the geometric quantum phase in the electronic energy level, and implements the quantum algorithm demo which has the function of error correction.

The research achievements of jiang shang da can be summed up in "fewer but better".In march, he took part in the national natural science fund committee outstanding youth science fund of concluding a plea, experts think highly of jiang shang da research work, think of his research more deeply and thoroughly, and systems.Jiang shang da only nine articles in the subject, but he put forward the cage structure of protection magnetic molecular quantum coherence of academic ideas, as well as the high spin molecular development train of thought for studying the quantum state space very innovative.After evaluation experts for examination and assessment, jiang shang da outstanding youth fund project concluding was rated as outstanding.

Jiang shang da said: "the greatest pleasures that doing basic research is to satisfy the thirst for knowledge and curiosity."Every subject research thoroughly, to dig deeper, to ensure that each article of the output to be able to clearly explain a problem, rather than to simply the pursuit of speed and the quantities.When asked about the scientific research of beginner's mind, jiang shang da said: "I do research of beginner's mind is to fill the blank of the cognitive science."

But for jiang shang da, group study will pay more attention to involve the application of some other commercial products, such as the use of external pulse electric field, the application of complex arbitrary waveform, frequency, high bandwidth cavity design, and so on.Jiang shang da mentioned that his team for the internal functions of the instrument is already very familiar with, when the need for further development of instrument function, often communicate with brooke technical personnel at home and abroad, brooke's staff response is very positive, the two sides established a deep friendship during the process of contact.In the process of communication, brooke staff will depth is introduced in detail instrument of expanding, jiang shang da team is based on the introduction, to the development of new functions.

Jiang shang da before use when looking for a job in Beijing university is brooke E580 epr spectrometer, now came to the spin of south China university of technology institute of science and technology, purchasing a E580, temporary not installed because of the outbreak, for research, electron paramagnetic spectrometer is the "lifeline" in lab work.

"It should be said that our team is E580 heavy use of the customer", jiang shang da said in an interview.

Brooke's paramagnetic resonance spectrometer development also has more than 20 years, especially the pulse type paramagnetic resonance spectrometer, a lot of users at home and abroad, it is more mature commercial product, set up the application scenario can satisfy the use of more than 99% of the users for the instrument.E580, for example, a main function is to electronic - double resonance experiment, E580 for this kind of test has been done more mature.

Electron paramagnetic resonance technique in chemical, material, are widely used in life science: in the field of inorganic chemistry, electron paramagnetic resonance can be very good study research result of micro electronic state, nanjing university, professor wang xp, dalian compound leaf by germinal professor, national university professor jian-feng li in this area have good results;In the field of organic chemistry, paramagnetic resonance technique to study the mechanism of free radical, wuhan university, professor ray aiwen has very good results in the direction;Applications in materials science, east China normal university professor bing-wen hu opened up a very important direction, to explore the mechanism of lithium battery in the REDOX reaction;In the biological field, usually using pulsed electron paramagnetic resonance study biological macromolecular conformation, tsinghua university party show professor Yang has made the important research;Professor jiang shang da research direction is also based on the important application of electron paramagnetic resonance technology, the research of magnetic molecules as electron spin carrier application in quantum information science and technology.

About the future development of electron paramagnetic resonance technology, jiang shang da think spin microscopic state role in the chemical reaction and catalytic has great development potential, it involves in situ electron paramagnetic resonance spectrum and combination of ultrafast spectroscopy, etc.

Jiang shang da think, electron paramagnetic resonance technology has the characteristics of an alternative and technical threshold is higher, although many people need the technology, but less skilled to use the technology of scientific workers.Spin of south China university of technology institute of science and technology is an interdisciplinary background of the new scientific innovation platform, was founded in 2021.Institute of magnetic molecules as the main research object, explore the spin related chemical reaction and physical effects, break through the single molecules spin control and sensing technology, the development of spin quantum related materials and devices, and drug development related molecular diagnostic technology.Institute covers chemical, spin spin manipulation, spin material and equipment, the spin of biomedical research, aimed at solving the important scientific problems of spin international science frontiers, key technology research and development of spin, the construction of international exchange of spin innovation platform.

Jiang shang da asked the students in the choice of research in the field of understanding should strive to is profound, only in their own small direction of cognitive than the teacher in order to be a qualified graduate student.Treat every student, project team will be in great detail instrument training students, asked the students on the basis of high scientific literacy, understanding of the purpose of the study, clear the meaning of the experimental setup, the preset possible problems and corresponding solutions.

Jiang shang da analysis way: with no edge in research, students should be given to encourage and help, and he together to solve difficult, find a new direction;Treat relatively impetuous students, should ask him to do sufficient literature research, will continue to pour out of new ideas is matured.

Jiang shang da said: students should lay a solid foundation, the blind pursuit of avoid by all means, make sure you have done more research depth.