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Meniscus-Assisted Solution Printing Enables Cocrystallization in Poly(3-alkylthiophene)-based Blends for Field-Effect Transistors

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Chinese Journal of Polymer Science 2023年第8期41卷 1269-1276,I0009页

作者： shu-Yin Zhu Juan Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200438China

The formation of cocrystallization in two various conjugated components may endow the newly formed conjugated cocrystals with multiple functionalities and improved charge transport ***,compared to conjugated small molecules,this strategy is rather limitedly realized in conjugated ***,a simple meniscus-assisted solution printing(MASP)strategy is utilized to achieve the cocrystallization in the blends of two conjugated polymers,i.e.,poly(3-hexylthiophene)(P3HT)and poly(3-octylthiophene)(P3OT),and the cocrystalline structures are correlated closely to their charge *** P3HT/P3OT blends phase separate and crystallize individually in their drop-cast thin *** subjecting the P3HT/P3OT blended solution to MASP,the confined solvent evaporation between two nearly parallel plates triggers them to cocrystallize progressively when accelerating the moving lower *** cocrystallization kinetics and the changes in P3HT/P3OT molecular structures are ***,these different crystalline structures of P3HT/P3OT blends are applied in organic fieldeffect transistors,imparting the cocrystallization-enhanced charge transport than respective P3HT and P3OT crystal *** MASP method can be extended to craft cocrystals of other conjugated polymer blends for their diverse optoelectronic applications.

关键词： Conjugated polymer blends Polythiophene Cocrystallization Charge mobility Meniscus-assisted solution printing

Soluble Two-dimensional Supramolecular Organic Frameworks(SOFs):An Emerging Class of 2D Supramolecular Polymers with Internal Longrange Orders

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Chinese Journal of Polymer Science 2019年第1期37卷 1-10页

作者： shu-Yan Jiang Xin Zhao CAS Key Laboratory of Synthetic and Self-assembly Chemistry for Organic Functional Molecules Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry Chinese Academy of Sciences

Two-dimensional(2D) materials have been demonstrated to exhibit unique properties originating from its 2D nature. In recent years, the construction of 2D materials has become a topic of great interest. This article summarizes the recent advance of 2D supramolecular organic frameworks(SOFs) which are homogeneously constructed in solution phase through self-assembly of rationally designed building blocks. These 2D SOFs are soluble and still maintain stable network structures in solutions, which exhibit uniqueness not only in structures but also in properties. In this concise review, the SOFs-related background is briefly introduced firstly, followed by outlining the research progress of soluble 2D SOFs from the perspective of monomer design, assembly, and structural *** article ends with a personal outlook on the future development of this new class of supramolecular polymers.

关键词： Supramolecular organic frameworks(SOFs) Self-assembly Two-dimensional Supramolecular polymers

The Important Roles of Water in Protein Folding:an Approach by Single Molecule Force Spectroscopy

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Chinese Journal of Polymer Science 2018年第3期36卷 379-384页

作者： Bo Cheng shu-Xun Cui School of Mechanical Engineering North University of ChinaTaiyuan 030051China Key Lab of Advanced Technologies of Materials Ministry of Education of ChinaSouthwest Jiaotong UniversityChengdu 610031China

The single-chain elasticity of a completely unfolded protein （027）8, modules of human cardiac titin） is studied in different liquid environments by the atomic force microscopy （AFM）-based single molecule force spectroscopy （SMFS）. The experimental results show that there is a clear deviation between the force curves obtained in the aqueous and nonaqueous environments. Such a deviation can be attributed to the additional energy consumed by the rearrangement of the bound water molecules around the chain of the completely unfolded （I27）s chain upon stretching in aqueous solution, which is very similar to the partial dehydration process from a denatured/unfolded to a native/folded protein. Through the analysis of the free energy changes involved in protein folding, we conclude that it is due to the weak disturbance of water molecules and the special backbone structures of proteins that the self-assembly of proteins can be achieved in physiological conditions. We speculate that water is likely to be an important criterion for the selection of self-assembling macromolecules in the prebiotic chemical evolution.

关键词： SMFS Protein Folding Water

Palladium Nanoparticles Supported on a Porous Organic Polymer： An Efficient Catalyst for Suzuki-Miyaura and So- nogashira Coupling Reactions

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Chinese Journal of Chemistry 2016年第4期34卷 373-380页

作者： Xiaomeng Ren Shengnan Kong Qiding shu Mouhai shu School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 China

A new porous organic polymer （POP） with high thermal stability and large surface area has been synthesized and applied in the preparation of Pd/POP catalyst. Pd/POP was characterized by XRD, TGA, SEM and TEM. The catalyst consists of highly dispersed palladium nanoparticles of 0.9--4 nm size on POP with a large surface area of 650 m2/g. It presents high catalytic activity for Suzuki-Miyaura and Sonogashira reactions. The catalyst was reus- able for three to five times without significant loss of activity.

关键词： heterogeneous catalysis palladium porous organic polymers Suzuki-Miyaura reaction Sonogashiracoupling reaction

Cardiovascular protective properties of gastrodin

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Asian Pacific Journal of Tropical Biomedicine 2022年第4期12卷 141-147页

作者： shu-Ting Yang shu-Bai Liu School of Life Sciences Yunnan UniversityKunming 650091YunnanChina State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming650201YunnanChina

Cardiovascular diseases cause significant morbidity and mortality worldwide,incurring a major public health *** elata Blume is a traditional Chinese herbal medicine that has been widely used to treat central nervous system and cardiovascular ***,as the major active component in Gastrodia elata Blume,can confer protection against cardiovascular *** this review,we summarize the anti-inflammatory actions,anti-cardiac hypertrophy,anti-hypertension,anti-atherosclerosis,and angiogenic effects of gastrodin,as well as its protective effects on vascular cells and against myocardial ischemia-reperfusion *** medical potential of gastrodin in diabetes-related cardiovascular diseases is also discussed.

关键词： Gastrodin Cardiovascular diseases Myocardial ischemia-reperfusion injury Gastrodia elata Blume Anti-atherosclerosis Cardio-protection

Optimal Dividend Payout for Classical Risk Model with Risk Constraint

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Acta Mathematicae Applicatae Sinica 2014年第3期30卷 721-734页

作者： shu-min CHEN School of Management Guangdong University of Technology

In this paper we consider the problem of maximizing the total discounted utility of dividend payments for a Cramer-Lundberg risk model subject to both proportional and fixed transaction costs. We assume that dividend payments are prohibited unless the surplus of insurance company has reached a level b. Given fixed level b, we derive a integro-differential equation satisfied by the value function. By solving this equation we obtain the analytical solutions of the value function and the optimal dividend strategy when claims are exponentially distributed. Finally we show how the threshold b can be determined so that the expected ruin time is not less than some T. Also, numerical examples are presented to illustrate our results.

关键词： optimal dividend risk constraint classical risk model fixed transaction cost

Creating chiral superstructures in magnetic quadrupole fields

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National Science Review 2023年第11期10卷 84-85页

作者： shu-Hong Yu Southern University of Science and Technology Hefei National Research Center for Physical Sciences University of Science and Technology of China Department of Chemistry Department of Materials Science and Engineering

Chiral materials refer to species with chiral symmetry, which means the absence of mirror planes or breaking of inversion symmetry in material structures. A material or structure is chiral if it is distinguishable from its mirror images. That is, the chiral materials and their mirror images do not coincide through rotations or translations. Chiral materials are frequently described as ‘handed’ because our hands themselves are *** exists in nature, including the DNA double helix, proteins, amino acids and human hands. Interestingly, biology only adopts one chirality in nature. While DNA, RNA and their building blocks are all right-handed, amino acids and proteins are all left-handed.

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Solution of Semi-Boundless Mixed Problem for Time-fractional Telegraph Equation

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Acta Mathematicae Applicatae Sinica 2007年第4期23卷 611-618页

作者： shu-qin Zhang Department of Mathematics China University of Mining and Technology Beijing 100083 China

In this paper, we study the semi-boundless mixed problem for time-fractional telegraph equation. We are able to use the integral transform method （the Fourier sin and cos transforms） to obtain the solution.

关键词： Time-fractional telegraph equation the Fourier sin and cos transforms mittag-leffier function,H-function

ULF electromagnetic precursors before the 1999 Jiji, Taiwan, earthquake and the comparison with results of simulating experiments

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Acta Seismologica Sinica(English Edition) 2001年第3期14卷 342-348页

作者： QIAN shu-qing 1. Laboratory of Tectonophysics & Institute of Geophysics China Seismological Bureau 100081 Beijing China 2. Seismological Bureau of Fujian Province 350003 Fuzhou China

There are many reports about the abnormal electromagnetic signals observed before great earthquakes. In particular, the signals of electromagnetic anomalies before the Hyogo-Ken Nanbu, Japan, MS=7.2 earthquake on January 17, 1995 (Hayakawa, et al, 1996) and those before the Loma Prieta, USA, MS=7.1 earthquake on October 19, 1989 (Fraser-Smith, et al, 1990) are especially remarkable. However, what the above authors reported are only the phenomena of one or two observatories. In order to confirm this phenomenon, the authors studied the results obtained by nine observatories in the southeast coastal areas of Chinese mainland within a range of 256~858 km to the epicenter of the 1999 Jiji, Taiwan, earthquake using instruments of the same type (the ULF/VLF electromag-netic wave observation system). By summarizing the data for the three months up to the time of earthquake occur-rence, the authors obtained the regional distribution of the signals of electromagnetic anomalies before the earth-quake and their features in the time domain and frequency domain.

关键词： Jiji earthquake experiment of rock fracture under compression ULF electromagnetic precursors mechanism of production and propagation P319