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Chinese Chemical Letters 2018年第10期29卷 1533-1536页

作者： Weijian Luo yiren zhang Yongyang Gong Qing Zhou Yongming zhang Wangzhang Yuan Shanghai Key Lab of Electrical Insulation and Thermal Aging Shanghai Electrochemical Energy Devices Research CenterSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong University

Pure organic luminogens with efficient room temperature phosphorescence（RTP） and remarkable mechanochromism are highly desired in view of their fundamental significance and technical applications. Herein, four twisted pure organic luminogens based on benzophenone and aromatic amines were synthesized and their photophysical properties were thoroughly investigated. They exhibit crystallization-induced phosphorescence（CIP）, giving bright fluorescence and phosphorescence dual emission in crystals. Upon grinding, they become amorphous and emit predominantly red-shifted fluorescence, demonstrating remarkable mechanochromism. Furthermore, three of them even demonstrate greatly enhanced emission upon grinding, which is rarely observed in twisted D-A structured luminogens.

关键词： Crystallization-induced phosphorescence Room temperature phosphorescence Mechanochromism Benzophenone Aromatic amines

Mechanisms of sesamol and sesamin inhibiting α-glucosidase activity by spectroscopy and molecular docking

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FOOD BIOSCIENCE 2023年第3期53卷 1641-1648页

作者： zhang, Shijia zhang, yiren Karrar, Emad Jin, Qingzhe zhang, Hui Wu, Gangcheng Wang, Xingguo Jiangnan Univ Natl Engn Res Ctr Funct FoodInt Joint Res Lab Lip Collaborat Innovat Ctr Food Safety & Qual Control Sch Food Sci & TechnolState Key Lab Food Sci & Te Wuxi Peoples R China Jiangnan Univ Int Joint Lab Food Safety Wuxi Peoples R China

Sesamol and sesamin inhibit a-glucosidase activity and may therefore be effective in treating type 2 diabetes, but their mechanisms remain unknown. Therefore, the inhibitory effects of sesamol and sesamin on a-glucosidase activity were analyzed by multispectral technique and molecular docking. Our findings indicated that the ses-amol and sesamin had a significant influence on a-glucosidase activity, with IC50 values of 0.96 mM and 0.33 mM, respectively, and their inhibition types were non-competitive. Both sesamol and sesamin quenched the fluorescence by a static quenching mechanism. The results of three-dimensional (3D) fluorescence, circular di-chroism (CD) spectroscopy and Fourier transform infrared spectrometer (FT-IR) showed that both sesamol and sesamin had certain effects on the conformation of a-glucosidase. Molecular docking results revealed that both sesamol and sesamin could spontaneously bind to a-glucosidase and form hydrogen bonds with some of the amino acid residues of the enzyme. As a result, this study sheds new light on sesamol/sesamin as a potential a-glucosidase inhibitor.

关键词： sesamol Sesamin alpha-glucosidase Inhibition mechanism Spectroscopy Molecular docking

Room temperature phosphorescence from natural products: Crystallization matters

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Science China Chemistry 2013年第9期56卷 1178-1182页

作者： GONG YongYang TAN YeQiang MEI Ju zhang yiren YUAN Wangzhang zhang YongMing SUN JingZhi TANG Ben Zhong School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Department of Polymer Science and Engineering Zhejiang University Department of Chemistry The Hong Kong University of Science & Technology HKUST Shenzhen Research Institute

Efficient room temperature phosphorescence is observed in natural compounds and polymers such as starch, cellulose, bovine serum albumin (BSA), and some other carbohydrates. Whereas being practically nonluminescent in solutions and TLC plates, they emit bright phosphorescence in the crystalline states with lifetime up to microseconds, exhibiting crystallization-induced phosphorescence (CIP) characteristics. The CIP of these natural products without any conventional chromophores offers a new platform for the exploration of conceptually novel luminogens.

关键词： room temperature phosphorescence natural products cellulose starch bovine serum albumin

Crystallization-induced phosphorescence of benzils at room temperature

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Science China Chemistry 2013年第9期56卷 1183-1186页

作者： GONG YongYang TAN YeQiang LI Hong zhang yiren YUAN Wangzhang zhang YongMing SUN JingZhi TANG Ben Zhong School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Department of Polymer Science and Engineering Zhejiang University Department of Chemistry The Hong Kong University of Science & Technology HKUST Shenzhen Research Institute

Efficient room temperature phosphorescence (RTP) is rarely observed in pure organic luminogens. However, we have newly observed that benzil and its derivatives are nonluminescent in solvents and thin layer chromatography (TLC) plates, but become highly phosphorescent in crystal state at room temperature, exhibiting typical crystallization-induced phosphorescence (CIP) characteristics. The CIP phenomenon is ascribed to the restriction of intramolecular rotations in crystals owing to effective intermolecular interactions. Such intermolecular interactions greatly rigidify the molecular conformation and significantly decrease the nonradiative deactivation channels of the triplet excitons, thus giving boosted phosphorescent emission at room temperature.

关键词： crystallization-induced phosphorescence room temperature phosphorescence benzils intermolecular interactions

Study on the interaction mechanism of virgin olive oil polyphenols with mucin and α-amylase

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Food Bioscience 2022年第3期47卷 728-735页

作者： Gangcheng Wu Ruobing Mao yiren zhang Ling Zhu Emad Karrar Hui zhang Qingzhe Jin Xingguo Wang State Key Laboratory of Food Science and Technology School of Food Science and TechnologyNational Engineering Research Center for Functional FoodInternational Joint Research Laboratory for Lipid Nutrition and SafetyCollaborative Innovation Center of Food Safety and Quality Control in Jiangsu ProvinceJiangnan UniversityChina International Joint Laboratory on Food Safety Jiangnan UniversityChina Department of Chemistry School of Physical ScienceUniversity of LiverpoolUK

The interaction mechanism of mucin and α-amylase with virgin olive oil (VOO) polyphenols (oleuropein (OL),tyrosol (TY),hydroxytyrosol (HT)) was analyzed by fluorescence,ultraviolet (UV) absorption,attenuated total reflection Fourier transform infrared (ATR-FTIR),circular dichroic (CD) spectroscopy and molecular docking.A total of 17 polyphenols have been identified in the selected VOO,and the TY,HT and OL were the main *** quenching mechanism between mucin/α-amylase and three VOO polyphenols was static,mainly through van der Waals forces and hydrogen *** results of UV absorption,ATR-FTIR,and CD spectroscopy revealed that the conformation of mucin changed after combining with the three polyphenols,while that of the α-amylase changed *** docking predicted the interaction sites of the three polyphenols with human salivary mucin and α-*** present study could provide the theoretical foundation for further research on the interaction between human salivary protein and phenolic compounds in VOO.

关键词： Mucin α-amylase Spectroscopy Molecular docking Virgin olive oil polyphenols

Low-cost and fluoride-free synthesis of MFI zeolite nanosheets with enhanced stability for benzene alkylation with ethanol

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Journal of Energy Chemistry 2025年第1期100卷 458-468页

作者： Peng Zhu Cun Liu yiren Yu Guoshu Gao Yumeng Zhao Xiongfu zhang Guodong Liu Guohui Yang State Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

Zeolite nanosheets with a short b-axis thickness are highly desirable in lots of catalytic reactions due to their reduced diffusion resistance. Nevertheless, conventional synthesis methods usually require expensive structure-directing agents(SDAs), pricey raw materials, and eco-unfriendly fluorine-containing additives. Here, we contributed a cost-effective and fluoride-free synthesis method for synthesizing high-quality MFI zeolite nanosheets through a Silicalite-1(Sil-1) seed suspension and urea cooperative strategy, only with inexpensive colloidal silica as the Si source. Our approach was effective for synthesizing both Sil-1 and aluminum-containing ZSM-5 nanosheets. By optimizing key synthesis parameters,including seed aging time, seed quantity, and urea concentration, we achieved precise control over the crystal face aspect ratio and b-axis thickness. We also revealed a non-classical oriented nanosheet growth mechanism, where Sil-1 seeds induced the formation of quasi-ordered precursor particles, and the(010)crystal planes of these particles facilitated urea adsorption, thereby promoting c-axis-oriented *** obtained ZSM-5 nanosheets exhibited exceptional catalytic performance in the benzene alkylation with ethanol, maintaining stability for over 500 h, which is 5 times longer than traditional ZSM-5 catalysts. Furthermore, large-scale production of ZSM-5 nanosheets was successfully carried out in a 3 L highpressure autoclave, yielding samples consistent with those from laboratory-scale synthesis. This work marks a significant step forward in the sustainable and efficient production of MFI nanosheets using inexpensive and environmentally friendly raw materials, offering the broad applicability in catalysis.

关键词： Aspect ratio

下肢静脉曲张的静脉显微结构成份定性和定量研究

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中华实验外科杂志 1997年第5期14卷 271-272页

作者：程勇张依仁重庆医科大学血管外科研究室 630042

目的:探讨大隐静脉结构变化与下肢静脉曲张发生的关系.方法:通过曲张和正常静脉的光镜、电镜检查,定性地分析两者结构的区别;通过图像定量分析,定量地比较两者胶原纤维相对含量(RCC)、弹性纤维相对含量(RCE)、管壁僵硬度(C/E) 以及中膜... 详细信息

目的:探讨大隐静脉结构变化与下肢静脉曲张发生的关系.方法:通过曲张和正常静脉的光镜、电镜检查,定性地分析两者结构的区别;通过图像定量分析,定量地比较两者胶原纤维相对含量(RCC)、弹性纤维相对含量(RCE)、管壁僵硬度(C/E) 以及中膜结缔组织基质在中膜平滑肌中的体积密度(CmC/MmC).结果:曲张静脉平滑肌细胞发生增生和转化;胶原纤维增生且RCC增多;弹性纤维崩解且RCE减少;C/E和 CmC/MmC也都升高.结论:静脉壁中膜平滑肌收缩性降低及管壁弹性降低使静脉易发生扩张.

关键词：平滑肌细胞胶原纤维弹性纤维静脉曲张下肢

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罗非鱼养殖技术之六奥尼罗非鱼苗种生产技术

中国水产 2006年第8期369卷 33-34页

作者：张以仁福建省德化县水产技术推广站 362500

奥尼罗非鱼是采用纯种的尼罗罗非鱼作母本、纯种的奥利亚罗非鱼作父本进行种问杂交而得到的子一代，其雄性率能达到90％以上，具有雄性率高、生长快、抗病力强、易捕捞等特点，深受群众欢迎。用杂交生产奥尼罗非鱼鱼苗是单性罗非鱼育种... 详细信息

奥尼罗非鱼是采用纯种的尼罗罗非鱼作母本、纯种的奥利亚罗非鱼作父本进行种问杂交而得到的子一代，其雄性率能达到90％以上，具有雄性率高、生长快、抗病力强、易捕捞等特点，深受群众欢迎。用杂交生产奥尼罗非鱼鱼苗是单性罗非鱼育种的一条途径，在生产上可大批量培育单性罗非鱼苗种，值得推广。

关键词：奥尼罗非鱼尼罗罗非鱼生产技术鱼苗种养殖技术单性罗非鱼奥利亚罗非鱼杂交生产雄性率子一代

Room temperature phosphorescence from natural products： Crystallization matters

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中国科学：化学 2013年第9期43卷 1201-1201页

作者： GONG YongYang TAN YeQiang MEI Ju zhang yiren YUAN Wangzhang zhang YongMing SUN JingZhi TANG BenZhong School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China Department of Chemistry The Hong Kong University of Science & Technology Clear Water Bay Kowloon Hong Kong China HKUST Shenzhen Research Institute Shenzhen 518057 China

Efficient room temperature phosphorescence is observed in natural compounds and polymers such as starch,cellulose,bovine serum albumin(BSA),and some other *** being practically nonluminescent in solutions and TLC plates,they emit bright phosphorescence in the crystalline states with lifetime up to microseconds,exhibiting crystallization-induced phosphorescence(CIP)*** CIP of these natural products without any conventional chromophores offers a new platform for the exploration of conceptually novel luminogens.

关键词：室温磷光结晶状态天然产物牛血清白蛋白天然化合物碳水化合物磷光寿命天然产品

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二元液滴自由碰撞聚并后的振荡行为研究

化工学报 2020年第4期71卷 1482-1490页

作者：李睿张以任陈杭路贵民于建国华东理工大学资源过程工程教育部工程研究中心上海200237 国家盐湖资源综合利用工程技术研究中心上海200237 上海污染控制与生态安全研究院上海200092

以甲苯、超纯水为多相系统研究对象,采用高速摄像机测试分析了二元液滴自由碰撞聚并后的振荡行为特性。实验结果表明,聚并后甲苯液滴振荡过程存在明显的周期性与阻尼衰减机制,液滴Reynolds数、Weber数是影响聚并后液滴振荡周期、阻尼系... 详细信息

以甲苯、超纯水为多相系统研究对象,采用高速摄像机测试分析了二元液滴自由碰撞聚并后的振荡行为特性。实验结果表明,聚并后甲苯液滴振荡过程存在明显的周期性与阻尼衰减机制,液滴Reynolds数、Weber数是影响聚并后液滴振荡周期、阻尼系数的关键无量纲参数。液滴惯性力与振荡周期呈正相关性,而液滴黏性力则主导了振荡过程的阻尼衰减机制,振荡阻尼系数随黏性力的增加而增加,同时,液滴碰撞聚并作用与其后续振荡过程相对独立,即碰撞聚并过程对液滴振荡行为特性无明显影响。此外,液滴振荡过程特性参数的实验与理论计算对比结果显示,振荡周期实验结果相较于理论值略微偏高,振荡周期、阻尼系数实验与计算值相对误差的标准差分别为14.9%和44.9%。

关键词：多相流流体力学自由碰撞聚结液滴振荡