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Ultrathin organic polymer with p-πconjugated structure for simultaneous photocatalytic disulfide bond generation and CO_(2)reduction

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Journal of Energy Chemistry 2023年第1期76卷 639-647,I0016页

作者： Linquan Hou Zhunyun Tang Guojiang Mao Shiheng Yin Bei Long Tao Ouyang Guo-Jun Deng Atif Ali Ting Song Key Laboratory for Green organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtan 411105HunanChina Hunan Key Laboratory for Micro-Nano Energy Materials and Device School of Physics and OptoelectronicsXiangtan UniversityXiangtan 411105HunanChina School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007HenanChina Analytical and Testing Center South China University of TechnologyGuangzhou 510640GuangdongChina Department of Chemistry and State Key Laboratory of Synthetic Chemistry The University of Hong KongPokfulam RoadHong Kong 999077China

Combining photocatalytic organic reactions with CO_(2)reduction is an efficient solar energy utilization mode,but it is still limited by the organic species that can be matched and the low ***,ultrathin organic polymer with p-πconjugated structure(TPP)was rationally designed and prepared,and showed a high yield of CO(15.2 mmol g^(-1))and conversion of SAS coupled products(100%),far exceeding the organic polymer with P=O *** enhanced photoredox activity of TPP is ascribed to the orbital interaction between the p-orbital on phosphorus and theπ-orbitals of aromatic,which can accelerate the photoinduced charge carrier separation and improve the CO_(2)adsorption *** can also be used for the dehydrocoupling of various benzyl mercaptans to the corresponding SAS bond *** work provides a new concept for the efficient synthesis of disulfide bonds combined with CO_(2)reduction in a photoreaction system.

关键词： Photocatalytic coupled reaction Disulfide bond CO_(2)reduction High activity organic polymer

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Ferrimagnetism and metal insulator transition in an organic polymer chain

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Chinese Physics B 2014年第2期23卷 470-476页

作者：丁林杰钟园樊帅伟 Department of Physics China Three Gorges University

The ferrimagnetism and quantum phase transition of a bipartite lozenge periodic Anderson-like organic polymer, in which the localized f electrons hybridize with the odd site conduction orbitals, are investigated by means of Green＇s function theory. The ground state turns out to be gapless ferrimagnetism. At a finite temperature, the ferrimagnetic-to- paramagnetic phase transition takes place. The Kondo screenings and Ruderman-Kittel-Kasuya-Yosida （RKKY） inter- action can reduce and increase the transition temperature, respectively. Two Kondo screenings compete with each other, giving rise to the localized f electron spin screened antiferromagnetically. Accordingly, in a magnetic field, all spins are aligned along the chain easily, which is associated with metal-insulator transition. Furthermore, in a temperature-field plane, we reveal the gapless and spin polarized phases, which are characterized by susceptibility and specific heat, and whose behaviours are determined by the competition between the up-spin and down-spin hole excitations.

关键词： ferrimagnetism quantum phase transition organic polymer

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Preparation and characterization of organic polymer modified composite polyaluminum chloride

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Journal of Environmental Sciences 2006年第2期18卷 214-220页

作者： SHI Bao-you TANG Hong-xiao State Key Laboratory of Environmental Aquatic Chemistry Chinese Academy of Sciences Beijing 100085 China

Compared with traditional aluminum salts, polyaluminum chloride （PACI） has better coagulation-flocculation performance in turbidity removal. However, it is still inferior to organic polymers in terms of bridging function. In order to improve the aggregating property of PACl, different composite PACl flocculants were prepared with various organic polymers. The effect of organic polymer on the distribution or Al（Ⅲ） species in composite flocculants was studied using ^27TAl NMR and Al-ferron complexation methods. The charge neutralization and surface adsorption characteristics of composite flocculants were also investigated. Jar tests were conducted to evaluate the turbidity removal efficacy of organic polymer modified composite flocculants. The study shows that cationic polymer and anionic polymer have significant influences on the coagulation-flocculation behaviors of PACl. Both cationic and anionic polymers can improve the turbidity removal performancc of PACl but the mechanisms arc much different： cationic organic polymer mainly increases the charge neutralization ability, but anionic polymer mainly enhances the bridging function.

关键词： polyaluminum chloride(PACl) organic polymer composite flocculant

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An Environment-Friendly High-Performance Aqueous Mg-Na Hybrid-Ion Battery Using an organic polymer Anode

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Energy & Environmental Materials 2023年第4期6卷 70-77页

作者： Shengnan Zhang Chunlin Zhao Kai Zhu Jiaqi Zhao Yinyi Gao Ke Ye Jun Yan Guiling Wang Dianxue Cao Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China

Aqueous Mg ion batteries(AMIBs)show great potential in energy storage for their advantages of high capacity,abundant resource,and environmental ***,the development of AMIBs is limited due to the scarcity of suitable anode *** this study,a new polymer anode material(PNTAQ)with flower-like nanosheet structure is synthesized for aqueous Mg-Na hybrid-ion battery(AMNHIB).PNTAQ possess carbonyl functional groups which can be oxidized and reduced reversibly in aqueous solution containing alkaline metal *** displays a discharge specific capacity of 245 mAh g^(−1)at 50 mA g^(−1)in 1 M MgCl_(2)+0.5 M NaCl electrolyte,which is much higher than that in single 1 M MgCl_(2)or 0.5 M NaCl *** cycling at 1000 mA g^(−1)for 1000 times,the capacity retention can still maintain at 87.2%.A full Mg-Na hybrid-ion cell is assembled by employingβ-MnO_(2)as cathode and PNTAQ as anode material,it exhibits a specific capacity of 91.6 mAh g^(−1)at 100 mA g^(−1).The polymer electrode material well maintains its framework structure during the discharge/charge cycling process of the hybrid-ion battery.

关键词： anode material aqueous battery Mg-Na hybrid-ion battery organic polymer

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Enhancing the stability of planar perovskite solar cells by green and inexpensive cellulose acetate butyrate

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Journal of Energy Chemistry 2023年第1期76卷 259-265,I0007页

作者： Bo Xiao Yongxin Qian Xin Li Yang Tao Zijun Yi Qinghui Jiang Yubo Luo Junyou Yang State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina Solar Energy Research Institute of Singapore National University of SingaporeSingapore 117574Singapore

Although the efficiency of organic–inorganic hybrid halide perovskite solar cells has been improved rapidly, the intrinsic instability of perovskite materials restricts their commercial application. Here, an eco-friendly and low-cost organic polymer, cellulose acetate butyrate(CAB), was introduced to the grain boundaries and surfaces of perovskite, resulting in a high-quality and low-defect perovskite film with a nearly tenfold improvement in carrier lifetime. More importantly, the CAB-treated perovskite films have a well-matched energy level with the charge transport layers, thus suppressing carrier nonradiative recombination and carrier accumulation. As a result, the optimized CAB-based device achieved a champion efficiency of 21.5% compared to the control device(18.2%). Since the ester group in CAB bonds with Pb in perovskite, and the H and O in the hydroxyl group bond with the I and organic cations in perovskite,respectively, it will contribute to superior stability under heat, high humidity, and light soaking conditions. After aging under 35% humidity(relative humidity, RH) for 3300 h, the optimized device can still maintain more than 90% of the initial efficiency;it can also retain more than 90% of the initial efficiency after aging at 65 ℃, 65% RH, or light(AM 1.5G) for 500 h. This simple optimization strategy for perovskite stability could facilitate the commercial application of perovskite solar cells.

关键词： Planar perovskite solar cells Long-term stability organic polymer Well-matched energy level Charge transportation and extraction

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Recent Progress of Chiral Hierarchical Assemblies from a Chinese Perspective

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CCS Chemistry 2023年第12期5卷 2736-2759页

作者： Wei Gong Wei Wang Jinqiao Dong Xiangcheng Pan Yan Liu Hai-Bo Yang Xuefeng Fu Yong Cui School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240 Shanghai Key Laboratory of Green Chemistry and Chemical Processes Shanghai Frontiers Science Center of Molecule Intelligent Synthesesand Chang-Kung Chuang InstituteSchool of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062 State Key Laboratory of Molecular Engineering of polymers Department of Macromolecular ScienceFudan UniversityShanghai 200438 Department of Chemical Sciences National Natural Science Foundation of ChinaBeijing 10085

Self-assembly of predesigned chiral molecules to form structurally diverse functional materials has been one of the most exciting recent developments in materials science and nanotechnology over the past ***,the rationally designed chiral supermolecules and their hierarchical assemblies result in superior microenvironments,in which they interact distinctly with molecularly asymmetric guests for enantiospecific *** chemistry of chiral supermolecule-based materials(CSMs)has become a lively research topic,and thus this review seeks to shed light on a range of synthetic CSMs at differing length scales developed in the past 5 years,with emphasis on the representative work from *** review includes cavity-containing chiral supermolecules,chiral polymers,and chiral crystalline materials,aiming to tackle important issues from their design,synthesis,and structure to cutting-edge ***,in turn,allows for fundamental understanding of the transfer,amplification,and functional expression of chirality from the molecular to the supramolecular to the macroscopic ***,we provide perspectives on the promises,opportunities,and key challenges for the future development of useful chiral functional materials.

关键词： chirality hierarchical assembly supramolecular complex organic polymer crystalline material

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Lanthanum Containing polymer’s Modification to PP

Lanthanum Containing Polymer’s Modification to PP

引用

2004 International Conference on Rare Earth Ceramics and Glass

作者：代少俊张明 Department of Material Yancheng Institute of TechnologyYancheng 224001China Department of Material Science and Engineering Nanjing University of TechnologyNanjing 210000China Department of Chemical and Chemistry Engineering Yangzhou UniversityYangzhou 225002China

＜正＞ Polypropylene （PP） ’s low impact strength limits its usages. Adding some a rare earth polymer can enhance PP’s tensile strength and impact strength. Acrylic lanthanum was prepared by the reaction between lanthanum oxide and acrylic acid. The IR spectrum prove that and optimum reacting conditions are that the bulk ratio of La（AA）3 and MMA is not less than one and temperature is about 80℃. Lanthanum containing polymer were added into PP. When percent of addition only was 3% , strength were enhanced 10% , and impact strength 40%. SEM shows the compatibility of rare earth polymer and PP;lanthanum containing polymer can form physical crosslinking between PP’s molecules, then every particle’s surface connect with several PP molecules and the PP mechanical property were enhanced.

关键词： organic polymer rare earth polymer acrylic lanthanum modification

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有机高分子改性SiO2气凝胶的初步研究

有机高分子改性SiO2气凝胶的初步研究

引用

2010年全国高分子材料科学与工程研讨会

作者：杨海龙孔祥明清华大学土木系

SiO气凝胶的某些性能相当优异,但是其应用受到两方面的制约。一是制备过程中须采用超临界干燥技术,以避免干燥过程中因巨大毛细孔压力导致孔隙结构坍塌和严重收缩,二是最终产品呈现硬脆性的特点,因此使用过程中难以进行再加工。目前,虽... 详细信息

SiO气凝胶的某些性能相当优异,但是其应用受到两方面的制约。一是制备过程中须采用超临界干燥技术,以避免干燥过程中因巨大毛细孔压力导致孔隙结构坍塌和严重收缩,二是最终产品呈现硬脆性的特点,因此使用过程中难以进行再加工。目前,虽然研究者采取各种方法致力于解决这两方面的问题,但是大部分研究结果并不是很好,采用单一方法能够同时解决这两个问题的研究更是少之又少。因此,本文试图采用具有高韧性的有机高分子材料对SiO气凝胶进行改性,以期同时解决上述两个难题。

关键词： organic polymer Silica aerogel Ambient pressure drying

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