检索结果-南通市图书馆

Deep-red and near-infrared organic lasers based on centrosymmetric molecules with excited-state intramolecular double proton transfer activity

引用

光电进展(英文) 2023年第7期6卷 19-28页

作者： Chang-Cun Yan Zong-Lu Che Wan-Ying Yang Xue-Dong Wang Liang-Sheng Liao Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyTaipaMacao SAR 999078China Institute of Functional Nano&Soft Materials Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesJoint International Research Laboratory of Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Negative Carbon TechnologiesCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China.

Organic lasers that emit light in the deep-red and near-infrared(NIR)region are of essential importance in laser communication,night vision,bioimaging,and information-secured displays but are still challenging because of the lack of proper gain ***,a new molecular design strategy that operates by merging two excited-state intramolecular proton transfer-active molecules into one excited-state double proton transfer(ESDPT)-active molecule was *** on this new strategy,three new materials were designed and synthesized with two groups of intramolecular resonance-assisted hydrogen bonds,in which the ESDPT process was proven to proceed smoothly based on theoretical calculations and experimental results of steady-state and transient *** from the effective six-level system constructed by the ESDPT process,all newly designed materials showed low threshold laser emissions at approximately 720 nm when doped in PS microspheres,which in turn proved the existence of the second proton transfer *** importantly,our well-developed NIR organic lasers showed high laser stability,which can maintain high laser intensity after 12000 pulse lasing,which is essential in practical *** work provides a simple and effective method for the development of NIR organic gain materials and demonstrates the ESDPT mechanism for NIR lasing.

关键词： excited-state intramolecular proton transfer organic laser near-infrared emission molecular design

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Precision Synthesis of a Long-Chain Silane Coupling Agent Using Micro Flow Reactors and Its Application in Dentistry

引用

Journal of Encapsulation and Adsorption Sciences 2016年第1期6卷 35-46页

作者： Kiyomi Fuchigami Hidefumi Fujimura Mitsuji Teramae Toshiyuki Nakatsuka Research and Development Department Shofu Inc. Kyoto Japan

In dentistry, a wide range of materials is available for restorative treatment;a typical product of such restorative materials mainly consists of radically polymerizable monomer(s) and inorganic filler(s) (for added physical strength), as well as a surface modifier (e.g. silane coupling agent) for improved affinity between monomer and filler. It is favorable to use an optimal surface modifier depending on the respective restorative materials. However, commercially available surface modifiers, which are synthesized by the ton, are not always suited for what is required for properties of the many different dental restorative materials. As a potential solution to such a problem, we focused on the latest technology, “micro flow reactors” that enabled an on-demand low-volume synthesis of many types of surface modifiers. Using micro reaction fields of such flow reactors, we synthesized a novel long-chain silane coupling agent. Compared to the control system synthesized using a conventional reaction flask, the novel system enabled significant reduction in reaction time without inducing any major side reactions. A dental composite resin that was treated with the novel coupling agent exhibited higher toughness, suggesting that such a silane coupling agent was an effective surface modifier.

关键词： Micro Flow Reactor Precision Synthesis Composite Resins molecular design Urethanization Hydrosilylation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Establishment of the model for composition prediction of light petroleum fractions and its application

引用

Progress in Natural Science:Materials International 1999年第5期 40-47页

作者：倪力军张立国倪进方袁渭康 China Department of Chemistry East China University of Science & Technology Faculty of Science Shanghai 200237

The problem of composition prediction of petroleum fractions was studied. molecular connectivity index 1 X was used to describe the molecular structure of hydrocarbons Relationships between some state parameters of SRK (Soave-Redlich-Kwong) equation and 1 X were established. On the basis of these relationships, a theoretical model for predicting the composition of petroleum fractions according to their properties was proposed. Correctional Powell method was used to solve the model. Computational results of five examples indicate that the compositions of mam components agree well with the measured data, which prove the feasibility and reliability of the model.

关键词： molecular design prediction multicomponent system chemometrics petroleum fractions prediction of composition.

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Recent developments in protein modeling and design

引用

Progress in Natural Science:Materials International 1995年第1期 3-7页

作者：来鲁华徐筱杰唐有祺 Beijing 100871 China Department of Chemistry Peking University State Key Laboratory for Structural Chemistry of Unstable and Stable Species

1 Protein modeling and molecular design The chemical reacitivity and biological activity of proteins are mainly determined by their three-dimensional structures. So a study on them is essential to protein *** X-ray crystallography is one of the most efficient methods for determining the protein structures, but it encounters difficulty in crystal growth. The recently developed multi-dimensional NMR can be directly used for determining protein structures in solu-tion, but it needs relatively large quantity of high-purity samples and requires the

关键词： protein modeling molecular design protein backbone structure phelctic tree rational drug design.

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Engineering varied serine protease inhibitors by converting P1 site of BF9,a weakly active Kunitz-type animal toxin

Engineering varied serine protease inhibitors by converting ...

引用

第十四届生物毒素毒理学术大会暨第一届生物毒素——从生存适应到转化医学专题学术会议

作者： Ding L Hao J Luo X Chen Z Department of Biochemistry and molecular Biology Institute of Basic Medical SciencesCollege of Basic MedicineHubei University of Medicine Department of Clinical Laboratory Dongfeng HospitalHubei University of Medicine Department of Clinical Laboratory Shiyan Occupational Disease Hospital

Although there were a lot of weakly active animal toxins in the venoms,their values and applications are still mysterious,such as BF9,which is a Kunitz-type toxin isolated from the venom of the elapid snake Bungarus ***,we used BF9 to be a molecular scaffold,and engineered eight BF9-derived peptides by changing P1 site Asn17 of BF9,such as BF9-N17 Y and BF9-N17 T designed from the polar subfamily,BF9-N17 L and BF9-N17 G designed from the Non-polar subfamily,BF9-N17 D designed from acidic subfamily,and BF9-N17 H,BF9-N17 K and BF9-N17 R designed from basic *** enzyme inhibitor experiment assays,we found a potent and selective chymotrypsin inhibitor BF9-N17 Y,a potent and selective coagulation factor XIa inhibitor BF9-N17 H,and two highly potent coagulation factor XIa inhibitors BF9-N17 K and *** and PT assays further showed that BF9-N17 H,BF9-N17 K and BF9-N17 R were three novel anticoagulants with selectively intrinsic coagulation pathway inhibitory *** that natural weakly active animal toxins are also a huge peptide resource,our present work might open a new window about pharmacological applications of weakly active animal toxins,which might be good templates for potent and selective molecular probe and lead drug designs.

关键词： Animal toxin Kunitz-type molecular design Peptide drug Protease inhibitor

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Towards the Rational design of Pt（Ⅱ） Anticancer Drugs and Zn（Ⅱ） Fluorescent Sensors

Towards the Rational Design of Pt（Ⅱ） Anticancer Drugs and...

引用

中国化学会第27届学术年会

作者：郭子建 State Key Lab of Coordination Chemistry Nanjing University

＜正＞In this lecture, I will summarize some of our recent studies on the platinum-based anticancer complexes and biological zinc sensors. There is a huge scope in the targeted delivery to the tumor cells and selectiv... 详细信息

关键词： molecular design Platinum Anticancer Drug Zinc Sensor.

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Theoretical screening of high-efficiency sensitizers with D-π-A framework for DSSCs by altering promising donor group

Theoretical screening of high-efficiency sensitizers with D-...

引用

第七届新型太阳能电池材料科学与技术学术研讨会

作者： Yuanchao Li Xin Li Yanling Xu MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringState Key Lab of Urban Water Resource and EnvironmentHarbin Institute of Technology

Various types of organic dyes were synthesized to enhance efficiency over past *** structure-property relationships is a significant issue to develop novel dye for high efficiency dye-sensitized solar cells(DSSCs).In this work,three novel dyes(JY40-1–JY42-1) with ullazine as donor were designed based on the dye sensitizers JY40,JY41 and JY42,and their geometrical structures,absorption spectra as well as optical properties were theoretically investigated by density functional theory(DFT) and time-dependent DFT(TD-DFT).Compared with original dyes,JY40-1–JY42-1 will exhibit better JSC due to higher light harvesting efficiency(LHE),regeneration driving force(ΔG),stronger and broader absorption spectra,superior ICT properties,and lower the driving force of regeneration(ΔG) as well as reorganization energy(λ).According to the analysis of interfacial interaction between the dye and electrolyte,JY40-1–JY42-1 have lower electron recombination rate,which further increase ***,ullazine group as electron donor can effectively enhance efficiency of DSSCs according to the above *** addition,JY42 exhibits a better balance in various important properties among three original dyes,which is in good agreement with the experimental *** work provide a guidance for molecular engineering and screen high-efficiency sensitizers for DSSCs.

关键词： Organic dye molecular design Optoelectronic properties Dye-sensitized solar cells Density functional theory

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Synthesis of Novel Bioactive Dipeptides: i-PrTyr-Tic

引用

有机化学 2003年第Z1期23卷 348-348页

作者： LIN Jun LIAO Su-Bo Victor J Hruby Department of Applied Chemistry Yunnan University Kunming 650091 Department of Chemistry University of Arizona Tucson AZ 85721 USA Department of Chemistry University of Arizona Tucson AZ 85721 USA

　　Peptide side-chain conformations, especially the aromatic side-chain residues, play an important role in the molecular recognition processes between peptide ligands and their corresponding receptors. The modifications on peptide side-chain can result in biological activity changes and many other property changes. β-alkyl constrained α- amino acids have been applied for peptide molecular design, and have resulted in some important results in peptideresearch in recent years.[1～3]……

关键词： molecular recognition biological activity property changes molecular design

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高性能润滑油的分子科学与工程应用

高性能润滑油的分子科学与工程应用

引用

2015年第十四届全国应用化学年会

作者：刘维民中国科学院兰州化学物理研究所

本文简述了润滑的发展历程,指出人类先后经历了使用动物脂肪、植物油、矿物基润滑油、合成润滑油、固体润滑等作为润滑材料的历史进程。重点介绍了合成酯类润滑油、航天航空用合成润滑油、离子液体润滑剂的设计制备方法及其性能特点,认... 详细信息

本文简述了润滑的发展历程,指出人类先后经历了使用动物脂肪、植物油、矿物基润滑油、合成润滑油、固体润滑等作为润滑材料的历史进程。重点介绍了合成酯类润滑油、航天航空用合成润滑油、离子液体润滑剂的设计制备方法及其性能特点,认为合成润滑油可按特殊的环境

关键词： lubricating oils synthetic lubricants molecular design engineering application

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：