In the afternoon of October 13, 2022, Professor Wang Xun from the Department of Chemistry of Tsinghua University was invited by Professor Huang Hui to give a lecture on " Sub-1nm Ultrathin Nanocrystals " at the University of Chinese Academy of Sciences.

As research in nanoscience continues to advance, more and more research is now focused on the bottom end of the "nanoworld": the scale of one nanometer or so or even one nanometer below, which is defined as "sub-nanometer" scale materials.

Polymeric materials are widely used because of their flexibility and good processing characteristics. However, inorganic materials tend to be hard and brittle in mechanical processing due to the composition of polar bonds, which limits the practical application of the materials to some extent. Prof. Wang Xun started with the inorganic nanowires in their previous work. They found that these inorganic nanowires have certain properties of polymer materials, so Wang Xun's group took this as a starting point and used electron microscopy to observe that the nanowires have very obvious structural flexibility, the skeleton can be bent in all directions arbitrarily, and even self-winding to form closed rings; and the dispersion of this nanowire has a polymer solution with After that, Prof. Wang Xun's group extended the system and discovered a wide range of properties of sub-nanomaterials. They then investigated two-dimensional and clustered sub-nanomaterials and found that these materials have good mechanical and electrochemical properties, greatly expanding the applications of sub-nanomaterials. After the presentation, Prof. Wang Xun received a warm applause from the students and faculty.

Xun Wang, professor in the Department of Chemistry, Tsinghua University, China. He was awarded the "Outstanding Young Scientist Fund" by the National Natural Science Foundation of China in 2007 and the "Cheung Kong Scholar Distinguished Professorship" in 2014. He is the Deputy Secretary General of the Chinese Chemical Society and the Deputy Secretary General of the Nanomaterials and Devices Branch of the Chinese Society for Materials Research.

On the morning of September 30, 2022, Professor Xu Huaping from the Department of Chemistry of Tsinghua University was invited by Professor Huang Hui to give a lecture on "Dynamically Responsive Selenium/Tellurium Containing Polymers" at the University of Chinese Academy of Sciences (UCAS) in Room 208 of the First Teaching Building.

Selenium/tellurium-containing polymer materials have gained widespread attention in recent years due to their potential for applications in self-healing, shape memory, information storage, optical programming materials, and medical materials.

In his lecture, Prof. Huaping Xu gave a clear and organized introduction to the history of the development of selenium/tellurium-containing polymer materials. Firstly, the unique bond energy of C-Se bond determines its unique dynamic responsiveness. The team synthesized various Se containing polymer materials and found that these materials have unique dynamic responsiveness. Then atomic force microscopy was used to test the chain-breaking energy and explain why the Se containing polymer materials are dynamically responsive from the bond energy perspective. He also introduced the applications of Se/Tellurium-containing polymer materials in various fields such as self-healing, shape memory, information storage, optical programming materials, hydrophobic materials, and medical materials. Finally, Prof. Xu Huaping exchanged and discussed with the students and teachers on site, which received enthusiastic responses from them. 

      Huaping Xu, Professor, Department of Chemistry, Tsinghua University, China, received his B.S. and Ph.D. degrees in 2001 and 2006, respectively, from the School of Chemistry, Jilin University, China, under the supervision of academician X. Zhang, and spent a year of exchange study at KU Leuven, Belgium, from 2004 to 2005. He has been a professor in the Department of Chemistry, Tsinghua University since 2014, and was awarded the "Young Chemistry Award of the Chinese Chemical Society" in 2011 and the "Outstanding Young Scientist Fund" by the National Natural Science Foundation of China in 2014. He is an associate editor of ACS Biomaterials Science & Engineering and an editorial board member of ACS Macro Letters, Supramolecular Materials, and Chemical Education.

Xiao Bin Gu gave an oral presentation entitled "All-polymer solar cells with efficiency-stability-cost balance based on non-covalent thick-ring structure of polymer acceptors", reporting the recent progress of the group in low-cost all-polymer solar cells, which attracted extensive discussions and full recognition from the audience. The presentation was widely discussed and fully affirmed. Finally, after the selection of the organizing committee, Xiaobin Gu was awarded the Excellent Oral Presentation Award.

From July 31 to August 4, 2022, more than 500 light-chasing young people from 99 units across China gathered in the clouds to attend the first photochemistry summer school of the Chinese Photoreceptor Society.

During the short but wonderful summer school, Academician Zhenhe Tong from the Institute of Physical and Chemical Technology, Chinese Academy of Sciences gave a vivid and detailed lecture on the basic theoretical system of photophysics and photochemistry. In the following days, Professor Ganglong Cui from Beijing Normal University, Professor Hui Huang from the University of Chinese Academy of Sciences, Professor Qingzheng Yang from Beijing Normal University, Professor Hongbing Fu from Capital Normal University, and Researcher Zhiwei Zuo from Shanghai Organic Institute, respectively, gave "Theoretical computational photochemistry", "Design and synthesis of organic polymer semiconductor materials", "Optical diagnosis and treatment and optical probes", "Organic laser materials and Devices" and "Photochemical Synthesis". In addition, teachers from the Institute of Physical and Chemical Technology of the Chinese Academy of Sciences and Dalian University of Technology also explained the testing methods of spherical differential electron microscopy, photoelectron spectroscopy, transient spectroscopy, electron paramagnetic resonance and other frontier characterization methods of photochemistry, and taught "real-world" testing experience.

Xiao Bin Gu gave an oral presentation entitled "All-polymer solar cells with efficiency-stability-cost balance based on non-covalent thick-ring structure of polymer acceptors", reporting the recent progress of the group in low-cost all-polymer solar cells, which attracted extensive discussions and full recognition from the audience. The presentation was widely discussed and fully affirmed. Finally, after the selection of the organizing committee, Xiao Bin Gu was awarded the Excellent Oral Presentation Award.

From July 29 to 31, 2022, The 4th National Conference on Organic Field-Effect Transistors & The 2nd International Conference on Flexible & Printed Optoelectronic Materials and Devices (OFET-4 & ICFPOE-2) was successfully held in Changsha, Hunan Province, China. Conference on Flexible & Printed Optoelectronic Materials and Devices (OFET-4 & ICFPOE-2) was successfully held at the Hyundai Kale Hotel in Changsha, Hunan Province. Prof. Huang Hui's team of six students (Wei Yanan, Chen Hao, Wang Song, Li Congqi, Gu Xiaobin, Zhang Meng) and two postdocs (Gao Jinhua and Li Zijie), led by Mr. Huang Hui, Mr. Shi Qinqin and Mr. Zhang Peasant, attended the conference.

 During the meeting, Mr. Huang Hui gave an invited presentation entitled "Theory, Characterization and Application Study of Non-Covalent Conformation Locks", Mr. Shi Qinqin gave an oral presentation entitled "The Green Synthetic Methods for Organic Semiconductors", and other students presented their results in the form of poster presentations.

 The conference will focus on the two themes of "field-effect transistors" and "flexible printed optoelectronic materials and devices", with the aim of academic exchange, discussing the latest progress of domestic and foreign research, opportunities and challenges, as well as future development directions, enhancing the communication and cooperation between domestic and foreign colleagues in the field of field-effect transistors and flexible printed optoelectronic materials and devices, and jointly promoting the cooperation and industrialization of field-effect transistors and flexible printed optoelectronic materials and devices.

 In addition, 8 RSC-JMCC Outstanding Oral Presentation Awards and 12 IOP Outstanding Poster Awards were selected by the expert group at the end of this meeting. Ms. Qinqin Shi of the group won the Outstanding Oral Presentation Award and Mr. Hao Chen won the Outstanding Poster Award.

      Professor Pei Jian pointed out in his report that organic electronic materials, especially organic semiconductor materials, have a wide range of applications in life and industry. In order to improve the performance of organic semiconductor devices, scientists use molecular doping to control the carrier concentration of organic semiconductor devices. and the Fermi level, filling its carrier traps and improving the electrical conductivity of the material, thereby achieving a significant improvement in the performance of organic semiconductor materials. To accomplish molecular doping of organic semiconductor devices, the properties of molecular dopants are particularly critical. A variety of new n-type dopants have been designed in view of the two problems existing in the existing n-type dopants: the counter-ion becomes an impurity that hinders charge transport and the phase separation of the dopant and the semiconductor is caused by poor miscibility.

      Prof. Pei Jian introduced the research progress of his research team in designing n-type dopants through organic negative hydrogen compounds, from doping mechanism, negative hydrogen mechanism, molecular design, electron-deficient framework system, synthesis route, performance characterization and industrialization. Excellent results have been achieved in applications and other aspects, and thermally excited doping, highly miscible TAM and N-heterocyclic carbene dopants have been introduced. At the end of the report, Professor Pei Jian also briefly introduced a variety of new n-type dopants, and predicted the future development trend of this field.

      In the Q&A session of the report, the teachers and students of the National Academy of Sciences and Professor Pei Jian conducted in-depth exchanges and discussions on academic and scientific research issues such as doping mechanism characterization, design principles of n-type dopants, and development of carbene dopants. The atmosphere was warm and the lecture ended successfully with warm applause.     

      Pei Jian, born in December 1967. Professor at the School of Chemistry and Molecular Engineering, Peking University. He received his Ph.D. from Peking University in 1995. Mainly engaged in the synthesis, characterization and device research of organic polymer semiconductor materials. Mainly include: design and synthesis of a series of high-performance star material systems, controllable modulation of the self-assembly behavior and microstructure of materials, and improvement of existing processes for device processing, and ultimately achieve high-efficiency and industrializable devices. So far, he has published more than 280 SCI-indexed papers in international academic journals, among which more than 50 papers have been published in international authoritative journals such as Nature sub-journal and JACS. In the international academic exchange activities, he has been invited to report more than 30 times in international conferences such as the annual meeting of the American Chemical Society, the annual meeting of the International Materials Research Association and the International Synthetic Metal Conference, and has served as the chairman of international conferences or branches for many times. He has applied for 9 national invention patents, 6 of which have been authorized, 3 international patents, 1 Taiwan patent, 2 US patents authorized in cooperation with the company, and 5 books. In 2004, he won the Outstanding Youth Fund of the National Natural Science Foundation of China; in 2010, he won the 5th Chinese Chemical Society-BASF Company Youth Knowledge Innovation Award; in 2011, he won the 7th Beijing Higher Education Teacher Award; in 2012, he was hired as an educator He is a Distinguished Professor of the Ministry of Education; in 2013, he won the first prize of the Natural Science Award of the Ministry of Education (the first person to complete it), and the first prize of the 7th Beijing Higher Education Teaching Achievement Award; in 2014, he won the 3rd Chinese Chemical Society-Evonik Chemical Innovation In 2016, he won the second prize of Beijing Science and Technology Award (the first person to complete it). In 2018, he won the second prize of the National Teaching Achievement Award. Invited to serve as the International Advisory Board of the most important conference in the field of polymer semiconductors - the International Conference on Synthetic Metals, the International Advisory Board of the international academic journal Chem. Asian J., and the Editorial Board Chair of Asian J. Org. Chem. In 2020, he was awarded the National Teaching Teacher.

      On the afternoon of March 16, 2022, researcher Wang Congyang from the Institute of Chemistry, Chinese Academy of Sciences was invited by Professor Huang Hui from the School of Materials Science and Optoelectronic Technology to give a lecture on "manganese group metal organocatalysis" at 2-329.

      In his report, Professor Wang Congyang mainly introduced a series of progress made by his research group in the catalytic C-H bond functionalization of manganese group metals (especially manganese metal complexes), including manganese-catalyzed enyne addition reaction, manganese-catalyzed polar Addition reactions, manganese-catalyzed hydrogen transfer reactions, etc. In view of the particularity of manganese group metal complexes, Prof. Wang Congyang's research group developed catalytic strategies such as manganese acid synergistic catalysis and manganese base synergistic catalysis, which successfully solved the transformation of manganese group metals from stoichiometric catalysis to catalytic quantity catalysis. At the same time, a series of C-H bonds on aromatic rings were successfully functionalized and modified, and the functional groups were well tolerated.

Wang Congyang

Education background:

2000-2005 Ph.D., Peking University, Supervisor: Professor Xi Zhenfeng

1996-2000 Undergraduate, Nanjing University, Supervisor: Professor Sun Xiangzhen and Professor Pan Yi

work experience:

2015-present University of Chinese Academy of Sciences, post professor

2010-present, Institute of Chemistry, Chinese Academy of Sciences, research group leader, researcher, doctoral supervisor

2007-2010 University of Münster, Germany, Humboldt Postdoctoral Fellow, Supervisor: Prof. Frank Glorius

2005-2007 Peking University, postdoctoral fellow, supervisor: Professor Xi Zhenfeng

Awards and Honors:

2020 National Natural Science Foundation of China "Science Fund for Distinguished Young Scholars"

2020 CCL Outstanding Young Scholar Award

2019 The 10th Chinese Chemical Society-BASF Youth Knowledge Innovation Award

2019 The 5th China Homogeneous Catalysis Youth Award

2019 Chinese Chemical Society "Periodic Table of Elements for Young Chinese Chemists" event, spokesperson of manganese element

2019 Green Synthesis & Catalysis, Elsevier, Associate Editor

2017 Chinese Chemistry Letters, Elsevier, Associate Editor

2017 Chinese Journal of Chemistry, Wiley-VCH, Editorial Board Member of Rising Stars

2015 Thieme Chemistry Journals Award, Germany

2015 Asian Core Program Lectureship Award, Japan

2015 Asian Core Program Lectureship Award, Singapore

2013 National Natural Science Foundation of China "Outstanding Youth Science Fund"

2011 Alexander von Humboldt Equipment Subsidy, Germany

2010 "Introduction of Foreign Outstanding Young Talents Program" by Institute of Chemistry, Chinese Academy of Sciences

2008 Alexander von Humboldt Research Fellowship, Germany

2006 First-class funding of the 38th China Postdoctoral Science Foundation

2005 Outstanding Graduate of Peking University

      On the morning of December 27, 2021, Professor Sun Yanming was invited by Professor Huang Hui from the School of Materials Science and Optoelectronic Technology to give a lecture on the theme of "High-Performance Organic Solar Cell Research" at Jiao 1-115.

      Prof. Yanming Sun first introduced the research status of organic solar cells, and pointed out that the construction of nanoscale interpenetrating network bulk heterostructures is the key to the preparation of high-efficiency organic solar cells, and it is very challenging to construct an ideal bulk heterostructure. Then Mr. Sun described a new strategy, namely "fiber network strategy" to regulate phase separation, that is to use the fibrous structure of polymer donors to build a morphological framework and form a hole transport network. , large area and semi-transparent devices also have important applications. Finally, a recent work of his research group is introduced. Using the traditional branched side chain substitution strategy, the molecular packing of non-fullerene acceptor molecules has been optimized, and the morphology of multi-scale blended films has been constructed. An organic solar cell with a device efficiency of up to 18.32%, a voltage loss of 0.55 V and a fill factor of 81.5%.

      Sun Yanming, School of Chemistry, Beihang University, professor and doctoral supervisor. In 2002, he graduated from the School of Chemistry, Shandong University. In 2007, he received his Ph.D. in physical chemistry from the Institute of Chemistry, Chinese Academy of Sciences. After that, he did postdoctoral research at the University of Manchester in the United Kingdom and the University of California, Santa Barbara in the United States. In September 2013, he returned to Beijing University of Aeronautics and Astronautics to work full-time. In 2018, it was approved by the National Science Fund for Distinguished Young Scholars. In 2019, he was selected as a Clarivate Analytics Global Highly Cited Scientist. He has been engaged in the research of organic optoelectronic functional materials and devices for a long time, and proposed a new strategy for regulating the phase separation of the active layer of organic solar cells by fiber network. Published more than 120 SCI papers in Nat. Mater., Nat. Commun., J. Am. Chem. Soc., Angew. Chem. Int. Ed., Adv. Mater. and other journals. His papers have been cited more than 13,000 times by Nature, Science and other journals, and many papers have been cited more than 1,000 times; in 2017 and 2018, he organized special issues on Macromol. Rapid Comm. and J. Energy Chem. as a guest editor respectively.

      On the afternoon of November 10, 2021, researcher Dong Huanli was invited by Professor Huang Hui from the School of Materials Science and Optoelectronic Technology to give a lecture on "From High Mobility to High Mobility Light-Emitting Organic Semiconductor Materials and Devices" at Jiao 1-114 .

      Organic field effect transistors using organic molecular materials as semiconductor layers are the basic building blocks of large-area flexible organic circuits due to their molecular designability, easy performance regulation, ease of processing, and good flexibility. A research platform for functional devices. The construction of high-performance organic field effect transistors is of great significance for promoting its device application research and functional integration device construction. In this lecture, researcher Dong Huanli first briefly introduced the entire development process of organic semiconductor materials, and focused on field effect transistors to describe some explorations carried out by his research group in realizing high-performance organic field effect transistors and organic light-emitting field effect transistor devices. Research, including the design and synthesis of organic field-effect materials, the control of aggregate state structure and device construction.

      Dong Huanli is currently a researcher, doctoral supervisor and research group leader at the Institute of Chemistry, Chinese Academy of Sciences. He has been devoted to the research of organic optoelectronic functional materials and devices for a long time, including multi-scale aggregation structure regulation and performance research; conjugated polymer crystals and devices; multifunctional organic semiconductor materials and devices. At present, he has published more than 200 SCI papers in Nat. Chem., Nat. Commun., J. Am. Chem. Soc., Angew. Chem. Int. Ed., Adv. Mater., etc., and has been cited by SCI more than 10,000 times. The first batch of members of the Youth Innovation Promotion Association of the Chinese Academy of Sciences (excellent in 2015), and successively won the Youth Chemistry Award of the Chinese Chemical Society (2014) and the second prize of the National Natural Science Award (5/5, 2016). He is currently the editorial board member and youth editorial board member of Journal of Chemistry in Higher Education Institutions, China Chemistry Letters, The Innovation, and Structural Chemistry.