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Highly active organocatalyst from a trivalent phosphazenium salt for ring-opening copolymerization of epoxides and cyclic anhydrides enhanced by hydrogen bonding interactions

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Science China Chemistry 2024年第9期67卷 3111-3120页

作者： Chunhuan Jiang junqi wang Xiaoyu Liu Xiaoxia You Ronglin Zhong Chuanli Ren Zhibo Li Key Laboratory of Biobased Polymer Materials Shandong Provincial Education DepartmentCollege of Polymer Science and EngineeringQingdao University of Science and TechnologyQingdao 266042China College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China Laboratory of Theoretical and Computational Chemistry Institute of Theoretical ChemistryCollege of ChemistryJilin UniversityChangchun 130012China

It is highly desirable to develop simple organocatalysts for the controlled ring-opening alternating copolymerization(ROAC)of epoxides and cyclic anhydrides,leading to high molecular weight ***,a phosphazenium salt,namely tri[tris(dimethylamino)phosphoranylidenamino]phosphonium chloride(P_(4)^(+)Cl^(-)),is developed as a catalyst for the ROAC of epoxides and cyclic ***,the combination of P_(4)^(+)Cl^(-)with a protonic initiator,such as 1,4-benzenedimethanol(BDM)exhibited high efficiency in the copolymerization of propylene oxide(PO)and phthalic anhydride(PA).This led to the production of polyester with an exceptional high molecular weight(M_n)of up to 126 k Da,which represented a rare example of poly(PO-alt-PA)with Mnsurpassing 100 k *** that the core P atom is trivalent status and the tris[tris(dimethylamino)]phosphoranyl group will share one proton in the P_(4)^(+)Cl^(-)*** combined with protonic species,the P_(4)^(+)Cl^(-)will not only serve as a proton acceptor but also as a hydrogen bonding donor for the cyclic ***,it was assumed that the P_(4)^(+)plus proton served dual role in mimic of base/urea pair to effectively catalyze ROAC,which was supported by density functional theory(DFT)calculations.

关键词： ring-opening copolymerization organocatalyst epoxides cyclic anhydrides phosphazenium salt

Low-carbon design towards sustainable city development:Integrating glass space with natural greenery

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Science China(Technological Sciences) 2024年第9期67卷 2659-2674页

作者： CAO Shi-Jie ZHANG CunKuan wang junqi FENG ZhuangBo CHEN Gang HAGHIGHAT Fariborz School of Architecture Southeast UniversityNanjing 210096China Jiangsu Province Engineering Research Center of Urban Heat and Pollution Control Southeast UniversityNanjing 210096China Global Centre for Clean Air Research Department of Civil and Environmental EngineeringFaculty of Engineering and Physical SciencesUniversity of SurreyGuildfordGU27XHUnited Kingdom The Third Construction Co. Ltd.of China Construction Eighth Engineering DivisionNanjing 210046China Energy and Environment Group Department of BuildingCivil and Environmental EngineeringConcordia UniversityMontrealH3G 1M8Canada

The rapid urban development has caused serious problems such as high energy consumption and carbon emissions,especially under the context of climate *** are particularly energy-intensive,generating about one third of global energyrelated carbon *** with active solutions(like mechanical systems),passive solutions offer the potential to balance energy consumption,thermal comfort,and ecological *** potential solution is the integration of green glass space(GGS)into passive building *** is a transitional building space with glass curtain walls that exhibit excellent insulation performance during ***,GGS is susceptible to overheating during summer,which limits its ***,this work proposes a strategy of integrating vertical greenery into GGS,leveraging the nature-based solution of greenery(i.e.,flourishes in summer and withers in winter)to address this seasonal challenge of *** results demonstrated that the strategic application of vertical greenery can effectively mitigate the overheating in GGS and improve comprehensive *** using full coverage of vertical greenery in a linear layout,the air temperature of GGS and cooling energy consumption were largely reduced by 8.02℃and 12.2%,respectively,while the carbon abatement was enhanced by up to 101.11 *** on a comprehensive evaluation of energy,economy,and environmental benefits,it is recommended to use a greenery configuration with 50%coverage in a vertical linear layout for *** integration of greenery into building design can mitigate adverse environmental impacts,reduce energy consumption,and contribute to the sustainable development of low-carbon cities.

关键词： low-carbon design green glass space vertical greenery greenery configuration carbon abatement

Chemodivergent Synthesis of Benzofurans and 2,3-Dihydrobenzofurans via Tandem Oxidative Annulation of Enaminones and Salicylaldehydes

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Chinese Journal of Chemistry 2024年第15期42卷 1727-1733页

作者： Xiyan Duan Hui Li junqi wang Kun Liu Meixin Shi Weidong Lian Ran Chen Pu Liu School of Chemistry&Chemical Engineering Henan University of Science and TechnologyLuoyangHenan 471003China

Chemodivergent synthesis of benzofurans and 2,3-dihydrobenzofurans has been *** a reaction system consisting of DBDMH and K_(2)CO_(3) as promotors,controlled conditions enabled the formation of two sets of valuable heterocycles from the tandem transformation of enaminones and *** key to success was the identification of the reaction parameters,in which the imine intermediate which was formed by transient halogenation coupling and substitution processes underwent either aldol condensation/annulation or imine hydrolysis/aldol *** additives NH_(4)Cl or Fe_(2)(SO_(4))_(3) controlled the unique selectivity of this reaction.A broad substrate scope of enaminones and salicylaldehydes has been employed in this reaction,demonstrating excellent functional group tolerance and versatility.

关键词： Cross-coupling Umpolung Domino reactions Enaminone Benzofurans 2,3-Dihydrobenzofurans

A converged ubiquitin-proteasome pathway for the degradation of TOC and TOM tail-anchored receptors

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Journal of Integrative Plant Biology 2024年第5期66卷 1007-1023页

作者： Meijing Yang Shuai Chen Shey-Li Lim Lang Yang Jia Yi Zhong Koon Chuen Chan Zhizhu Zhao Kam-Bo Wong junqi wang Boon Leong Lim School of Biological Sciences University of Hong KongPokfulam 999077Hong KongChina Department of Biology Southern University of Science and TechnologyShenzhen 518055China School of Biomedical Engineering Shenzhen UniversityShenzhen 518060China School of Life Sciences The Chinese Universityof Hong KongShatin 999077HongKongChina State Key Laboratory of Agrobiotechnology The Chinese University of Hong KongShatin 999077Hong KongChina HKU Shenzhen Institute of Research and Innovation Shenzhen 518052China

In plants,thousands of nucleus-encoded proteins translated in the cytosol are sorted to chloroplasts and mitochondria by binding to specific receptors of the TOC(translocon on the outer chloroplast membrane)and the TOM(translocon on the outer mitochondrial membrane)complexes for import into those *** degradation pathways for these receptors are ***,we discovered a converged ubiquitin-proteasome pathway for the degradation of Arabidopsis thaliana TOC and TOM tail-anchored *** receptors are ubiquitinated by E3 ligase(s)and pulled from the outer membranes by the AAA+adenosine triphosphatase CDC48,after which a previously uncharacterized cytosolic protein,transmembrane domain(TMD)-binding protein for tail-anchored outer membrane proteins(TTOP),binds to the exposed TMDs at the C termini of the receptors and CDC48,and delivers these complexes to the 26S proteasome.

关键词： 26S proteasome CDC48 SP1 TOC TOM ubiquitination

Comparative proteomics analysis reveals the domesticated Lepista sordida primordium differentiation regulation mechanism and the subsequent different development patterns in the pileus and stipe

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Food Science and Human Wellness 2024年第5期13卷 3066-3082页

作者： Xiuqing Yang Meijie Liu Yanjiao Zhang Lizhong Guo junqi wang Sizhu Li Yan Zhang Xiaobo Li Lili Xu Hao Yu Shandong Provincial Key Laboratory of Applied Mycology School of Life SciencesQingdao Agricultural UniversityQingdao 266109China Shandong Agricultural Technology Extending Station Jinan 250100China Shandong Mushroom Industrial Technology Innovation Research Institute Jining 273500China

The wild Lepista sordida is a kind of precious and rare edible *** excellent strain of it by artificial domestication was obtained,which was high-yield and high in iron *** this study,high-throughput comparative proteomics was used to reveal the regulatory mechanism of its primordium differentiation in the early fruiting body *** mycelium before the primordium differentiation mainly expressed high levels of mitochondrial functional proteins and carbon dioxide concentration regulatory *** young mushrooms,the highly expressed proteins were mainly involved in cell component generation,cell proliferation,nitrogen compound metabolism,nucleotide metabolism,glutathione metabolism,and purine *** differential regulation patterns of pileus and stipe growth to maturity were also *** highly expressed proteins related to transcription,RNA splicing,the production of various organelles,DNA conformational change,nucleosome organization,protein processing,maturation and transport,and cell detoxification regulated the pileus development and *** proteins related to carbohydrate and energy metabolism,large amounts of obsolete cytoplasmic parts,nutrient deprivation,and external stimuli regulated the stipe development and *** CAZymes regulated nutrient absorption,morphogenesis,spore production,stress response,and other life activities at different growth and development stages.

关键词： Lepista sordida Comparative proteomics Primordial differentiation Growth and development regulation Pileus Stipe

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房柱采空区下工作面切眼巷积水区探测及煤柱应力研究

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煤炭工程 2024年第8期56卷 132-137页

作者：刘星宇王飞汪军琪国能榆林能源有限责任公司郭家湾煤矿分公司陕西榆林719300 世纪万安科技(北京)有限公司北京100029

针对郭家湾煤矿51208综采工作面初采初放期间上覆4煤采空区积水和残留煤柱矿压等因素的影响,采取采前物探、钻探等工程手段,查清并疏放完成影响安全生产的上覆采空区积水;采取理论计算、FLAC^(3D)数值模拟、现场实测等方法,研究了51208... 详细信息

针对郭家湾煤矿51208综采工作面初采初放期间上覆4煤采空区积水和残留煤柱矿压等因素的影响,采取采前物探、钻探等工程手段,查清并疏放完成影响安全生产的上覆采空区积水;采取理论计算、FLAC^(3D)数值模拟、现场实测等方法,研究了51208综采工作面来压步距和应力分布规律。研究结果表明,通过提前物探、钻探等工程手段以及理论计算、数值模拟等分析论证,有效治理了影响综采工作面开采的残余煤柱矿压、采空区积水、煤层露头和裂隙发育等主要隐蔽致灾因素,为类似综采工作面安全回采积累了经验。

关键词：上覆采空区综采工作面矿山压力隐蔽致灾因素

具有超衍射和多受体的新型纳秒激光直写研究进展(特邀)

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中国激光 2024年第12期51卷 292-308页

作者：王骏琦陈胜垚王树马立俊杜潇姗王聪齐俊杰刘前北京科技大学材料科学与工程学院北京100083 中国科学院纳米卓越中心国家纳米科学中心中国科学院大学北京100190 南开大学物理科学学院泰达应用物理研究院弱光非线性光子学教育部重点实验室天津300071 北京化工大学理学院北京100029

激光直写(LDW)是一种无掩模、高效且经济的微纳米加工手段,它广泛应用于微机电系统、光刻掩模版制作和微纳米加工等领域。随着纳米技术的迅猛发展,研究人员对LDW系统的多受体和高加工分辨率的需求日益增加。为了满足上述需求和探索新的... 详细信息

激光直写(LDW)是一种无掩模、高效且经济的微纳米加工手段,它广泛应用于微机电系统、光刻掩模版制作和微纳米加工等领域。随着纳米技术的迅猛发展,研究人员对LDW系统的多受体和高加工分辨率的需求日益增加。为了满足上述需求和探索新的微纳米加工技术,开发新型激光直写系统已成为必然。新型纳秒LDW系统是在激光与物质的非线性相互作用的原理下工作的,不仅突破了传统LDW只能使用有机光刻胶作为受体材料的限制,同时实现了超越衍射极限的加工。已经取得的进展表明了新型纳秒激光直写在多种材料刻写及纳米结构加工方面的优势和巨大发展潜力。本文将从原理、设备、技术方法与新应用等方面对新型纳秒激光直写进行评述和讨论。

关键词：激光直写超衍射加工多受体材料纳米加工

有机磷腈盐/三乙基硼二元催化体系协同催化环氧化物与二氢香豆素的开环交替共聚

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高等学校化学学报 2024年第7期45卷 166-172页

作者：姜春环王俊麒刘晓雨杨烨任传利李志波青岛科技大学化工学院高分子科学与工程学院青岛266042

通过使用有机磷腈盐催化剂三[三(二甲氨基)亚氨基]氯化磷(P_(4)^(+)Cl^(-))与三乙基硼(TEB)组成的二元协同催化体系,实现了3,4-二氢香豆素(DHC)与多种环氧化物的开环交替共聚.系统考察了聚合温度和催化剂用量等因素对聚合活性和选择性... 详细信息

通过使用有机磷腈盐催化剂三[三(二甲氨基)亚氨基]氯化磷(P_(4)^(+)Cl^(-))与三乙基硼(TEB)组成的二元协同催化体系,实现了3,4-二氢香豆素(DHC)与多种环氧化物的开环交替共聚.系统考察了聚合温度和催化剂用量等因素对聚合活性和选择性的影响.研究结果表明,通过优化聚合反应条件,P_(4)^(+)Cl^(-)/TEB催化体系对多种环氧化物与DHC的开环交替共聚表现出较高的催化活性和选择性,避免了分子内酯交换等副反应.研究了反应动力学,利用核磁共振氢谱(^(1)H NMR),体积排阻色谱(SEC)和基质辅助激光解吸/电离时间飞行质谱(MALDI-TOF-MS)对聚合物结构进行表征,结果表明产物为端基明确、分子量可控的高度交替结构的醚酯共聚物.

关键词：磷腈盐有机催化酚内酯开环交替共聚聚酯

基于“玄府-络脉”理论探讨糖尿病性勃起功能障碍的病机及治疗方法

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西部中医药 2024年第7期37卷 22-25页

作者：王军琦通渭县人民医院甘肃通渭743300

基于“玄府-络脉”理论,阐述玄府-络脉的生理功能及病理表现,提出玄府闭塞,络脉瘀血为糖尿病性勃起功能障碍的核心病机。玄府闭塞,脏腑功能失调,精微失布,发为消渴,病程日久,内生糖毒,损伤络脉,衍生阳痿。因此,治疗时引入风类药辛散开... 详细信息

基于“玄府-络脉”理论,阐述玄府-络脉的生理功能及病理表现,提出玄府闭塞,络脉瘀血为糖尿病性勃起功能障碍的核心病机。玄府闭塞,脏腑功能失调,精微失布,发为消渴,病程日久,内生糖毒,损伤络脉,衍生阳痿。因此,治疗时引入风类药辛散开玄以治其本,虫类药活血通络以治其标,标本兼治,则诸症皆除,为中医从微观结构层次治疗该病提供新思路。

关键词：勃起功能障碍糖尿病玄府络脉活血通络辛散开玄