检索结果-南通市图书馆

Generation of color-controllable room-temperature phosphorescence via luminescent center engineering and in-situ immobilization

引用

Chinese Chemical Letters 2023年第7期34卷 193-199页

作者： Licheng Zheng Kai Jiang jiaren du Yike Li Zhongjun Li Hengwei Lin International Joint Research Center for Photo-responsive Molecules and Materials School of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhou 450001China

Materials with controllable luminescence colors are highly desirable for numerous promising applications, however, the preparation of such materials, particularly with color-controllable room-temperature phosphorescence(RTP), remains a formidable challenge. In this work, we reported on a facile strategy to prepare color-controllable RTP materials via the pyrolysis of a mixture containing 1-(2-hydroxyethyl)-urea(H-urea) and boric acid(BA). By controlling the pyrolysis temperatures, the as-prepared materials exhibited ultralong RTP with emission colors ranging from cyan, green, to yellow. Further studies revealed that multiple luminescent centers formed from H-urea, which were in-situ embedded in the B2O3matrix(produced from BA) during the pyrolysis process. The contents of the different luminescent centers could be regulated by the pyrolysis temperatures, resulting in color-tunable RTP. Significantly, the luminescent center engineering and in-situ immobilization strategy not only provided a facile method for conveniently preparing color-controllable RTP materials, but also endowed the materials prepared at relatively lower temperatures with color-changeable RTP features under thermal stimulus. Considering their unique properties, the potential applications of the as-obtained materials for advanced anti-counterfeiting and information encryption were preliminarily demonstrated.

关键词： Carbon dots Room-temperature phosphorescence Luminescent center engineering In-situ immobilization Anti-counterfeiting Information security

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

Green and Near-Infrared dual-Mode Afterglow of Carbon Dots and Their Applications for Confidential Information Readout

引用

Nano-Micro Letters 2021年第12期13卷 148-162页

作者： Yuci Wang Kai Jiang jiaren du Licheng Zheng Yike Li Zhongjun Li Hengwei Lin College of Chemistry Zhengzhou UniversityZhengzhou 450001People’s Republic of China International Joint Research Center for Photo-Responsive Molecules and Materials School of Chemical and Material EngineeringJiangnan UniversityWuxi 214122People’s Republic of China Key Laboratory of Graphene Technologies and Applications of Zhejiang Province Ningbo Institute of Materials Technology&Engineering(NIMTE)Chinese Academy of SciencesNingbo 315201People’s Republic of China

Near-infrared(NIR),particularly NIR-containing dual-/multimode afterglow,is very attractive in many fields of application,but it is still a great challenge to achieve such property of materials. Herein,we report a facile method to prepare green and NIR dual-mode afterglow of carbon dots(CDs) through in situ embedding o-CDs(being prepared from o-phenylenediamine) into cyanuric acid(CA) matrix(named o-CDs@CA). Further studies reveal that the green and NIR afterglows of o-CDs@CA originate from thermal activated delayed fluorescence(TADF) and room temperature phosphorescence(RTP) of o-CDs,respectively. In addition,the formation of covalent bonds between o-CDs and CA,and the presence of multiple fixation and rigid e ects to the triplet states of o-CDs are confirmed to be critical for activating the observed dual-mode afterglow. due to the shorter lifetime and insensitiveness to human vision of the NIR RTP of o-CDs@CA,it is completely covered by the green TADF during directly observing. The NIR RTP signal,however,can be readily captured if an optical filter(cut-o wavelength of 600 nm) being used. By utilizing these unique features,the applications of o-CDs@CA in anti-counterfeiting and information encryption have been demonstrated with great confidentiality. Finally,the as-developed method was confirmed to be applicable to many other kinds of CDs for achieving or enhancing their afterglow performances.

关键词： Carbon dots dual-mode afterglow Room temperature phosphorescence Thermal activated delayed fluorescence Information security

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

Amorphous Structure and Bonding Chemistry of Aluminium Antimonide（AISb） Alloy for Phase-change Memory Device

引用

Chemical Research in Chinese Universities 2016年第1期32卷 76-81页

作者： SUN Yu WANG Xuepeng du jiaren CHEN Nianke YU Hongmei WU Qi MENG Xing State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering College of Computer Science and Technology College of Physics Jilin University Changchun 130012 P. R. China

With the help of first-principles molecular dynamics calculations, we obtained the atomic picture of amorphous A1Sb（a-A1Sb） for phase-change memory application. Generally, a-A1Sb shows sp3 bonding network, which is the intrinsic characteristic for its good thermal stability. Significant wrong（homogenous） AI-AI bonds can also be observed from the pair correlation function. This hints the amorphous phase may consist of A1 cluster and Sb-rich A1-Sb alloy. Recent experiment has observed the Sb-rich region of AISb alloy can be switched to crystal, on the basis of which, combined with our calculations, we thus propose that on the one hand such a Sb-rich region in a-A1Sb can retain the rapid crystallization like pure Sb solid and on the other hand some AI atoms play the important role of stabilizing Sb rich network with sp3 bonding. The present study offers a microscopic view to understand the phase change mechanism of AlSb alloy for information storage device.

关键词： AISb alloy Amorphous phase Phase-change memory device Ab initio calculation

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

Instability Origin and Improvement Scheme of Facial Alq3 for Blue OLED Application

引用

Chemical Research in Chinese Universities 2016年第3期32卷 423-427页

作者： du jiaren WANG Moran CHEN Nianke XIE Shengyi YU Hongmei WU Qi State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University Changchun 130012 P R. China Center for High Pressure Science and Technology Advanced Research Changchun 130012 P R. China College of Computer Science and Technology Jilin University Changchun 130012 P R. China

Degradation phenomenon and poor stability of tris（8-hydroxyquinoline） aluminum（Ⅲ）（Alq3）-based organic light-emitting diodes（OLEDs） have attracted much attention. In this paper, we discussed the origin of instability of the facial Alq3-based blue luminescent OLEDs with the help of first-principles calculation. The results show that environmental humidity seriously affects the luminescence stability of Alq3-based OLEDs. H20 molecules in envi- ronment can be firmly bound to the oxygen atoms of the facial Alq3, which then act as starting points for further de- gradation of Alq3. Moreover, the interactions between facial Alq3 and different cathode metal layers were investigated to explain the experiment phenomenon. A design guideline for diminishing the strong attraction from oxygen atoms can be proposed to protect Alq3 and improve the stability of materials applied in OLEDs.

关键词： Organic light-emitting diode(OLED) Facial tris(8-hydroxyquinoline) aluminum(Ⅲ)(Alq3) First-principle calculation Degradation mechanism

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

Enabling robust and hour-level organic long persistent luminescence from carbon dots by covalent fixation

引用

Light(Science & Applications) 2022年第4期11卷 686-696页

作者： Kai Jiang Yuci Wang Cunjian Lin Licheng Zheng jiaren du Yixi Zhuang Rongjun Xie Zhongjun Li Hengwei Lin International Joint Research Center for Photo-responsive Molecules and Materials School of Chemical and Material EngineeringJiangnan University214122 WuxiChina College of Chemistry Zhengzhou University450001 ZhengzhouChina State Key Laboratory of Physical Chemistry of Solid Surface Fujian Provincial Key Laboratory of Materials Genomeand College of MaterialsXiamen University361005 XiamenChina

The first carbon dot(CD)-based organic long persistent luminescence(OLPL)system exhibiting more than 1 h of duration was *** contrast to the established OLPL systems,herein,the reported CDs-based system(named m-CDs@CA)can be facilely and effectively fabricated using a household microwave oven,and more impressively,its LPL can be observed under ambient conditions and even in aqueous *** and TEM characterizations,afterglow decay,time-resolved spectroscopy,and ESR analysis were performed,showing the successful composition of CDs ***,the formation of exciplexes and long-lived charged-separated *** studies suggest that the production of covalent bonds between CA and CDs plays pivotal roles in activating LPL and preventing its quenching from oxygen and *** the best of our knowledge,this is a very rare example of an OLPL system that exhibits hourlevel afterglow under ambient ***,applications of m-CDs@C.A in glow-in-the-dark paints for emergency signs and multicolored luminous pearls were preliminarily *** work may provide new insights for the development of rare earth-free and robust OLPL materials.

关键词： luminescence system ambient

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

Achieving Seconds-to-Hours duration-Tunable Organic Long Persistent Luminescence from Carbon Dots-Based Exciplex Systems by Energy Gaps Regulation

引用

Chinese Journal of Chemistry 2024年第12期42卷 1407-1417页

作者： Yixuan Xu Kai Jiang Linger Feng Xinyuan Tong Zuxu Zhou Fengshi Li Yi Zhang jiaren du Hengwei Lin International Joint Research Center for Photo-responsive Molecules and Materials School of Chemical and Material EngineeringJiangnan UniversityWuxiJiangsu214122China State Key Laboratory of Food Science and Resources Jiangnan UniversityWuxiJiangsu 214122China

Comprehensive Summary duration-tunable afterglow materials have garnered considerable attention in various ***,carbon dots(CDs)-based long persistent luminescence(LPL)composites with a tunable duration in an ultrawide range of seconds-to-hours levels were designed and prepared for the first *** contrast to the established CD-based afterglow materials,we reported that CD-based composites exhibit LPL in the form of exciplexes and long-lived charge-separated states,enabling the LPL to be prolonged from several seconds to over one hour,exceeding the typical regulation range(limited to 1 min).Further studies revealed that the relationship between the excited and charge-transfer states of CDs plays a pivotal role in activating the LPL and regulating its ***,these composites exhibited high photoluminescence(PL)quantum yields of up to 60.63%,and their LPL was robust under ambient conditions,even in aqueous *** robust and superior LPL performance endows these composites with a strong competitive advantage in dynamic display systems,such as tags for time-resolved data encryption and displays of the remaining time of *** study offers an approach to preparing CDs-based LPL composites with tunable durations and may provide new insights for the development of rare-earth-free LPL materials.

关键词： Carbon dots Composites Charge separation Exciplex Persistent luminescence

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

Modulating Trap Distribution of Persistent Phosphors Upon Simple Microwave-assisted Solid-state Reactions

Modulating Trap Distribution of Persistent Phosphors Upon Si...

引用

第十四届中国包头·稀土产业论坛、中国稀土学会2022学术年会

作者： jiaren du Tengyue Wang Panqin Wang Shaoxing Lyu Hengwei Lin International Joint Research Center for Photo-responsive Molecules and Materials School of Chemical and Material EngineeringJiangnan University

The trap distribution due to defects in persistent luminescent materials plays asignificant role in their scope of ***,it is a big challenge to manipulate ormodulate this trap *** this work,the trap distribution of gr... 详细信息

关键词： Modulating Trap Distribution of Persistent Phosphors Upon Simple Microwave-assisted Solid-state Reactions

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

Recent Advance in Low-Dielectric-Constant Organosilicon Polymers

引用

Chinese Journal of Chemistry 2023年第18期41卷 2371-2381页

作者： jiaren Hou Jing Sun Qiang Fang Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic ChemistryChinese Academy of Sciences345Lingling RoadShanghai 200032China Center for Excellence in Molecular Synthesis Shonghai Institute of Organic ChemistryChinese Academy of Sciences345 Lingling RoodShanghai 200032China University of Chinese Academy of Sciences 19 Yuquan RoadShijinshan DistrictBeijing 100049China

Comprehensive Summary,Low dielectric(low-k)organosilicon polymers have received extensive interests from industry and academia due to good electrical insulation,high temperature resistance,flame retardancy and *** attractive properties enable them to be utilized as low-k materials in fabrication of electronic devices in high-frequency communication *** review summarizes recent progress in developing low-k organosilicon polymers,including the synthetic methods and properties of different organosilicon polymers classified according to the chemical *** may provide some inspiration to design new low-k organosilicon polymers for application in the.

关键词： Organosilicon polymers Low dielectric materials Thermosetting resins Functional polymers Monomers Resins

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

WU’S SOLITON IN A SLOPING TROUGH

引用

Chinese Physics Letters 1990年第9期7卷 406-409页

作者： YAN jiaren YOU Jianqiang Department of Physics Xiangtan UniversityXiangtan 411105

The expression of Wu’s hydrodynamic soliton in a sloping trough was derived wing the perturbation method of multiple *** showed that the soliton slowly moves toward the shallow end with uniform acceleration,which is ... 详细信息

关键词： shallow trough scales

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

Interaction Between Two Nonlinear Schrödinger Solitons

引用

Chinese Physics Letters 1994年第5期11卷 265-268页

作者： ZOU Fengwu YAN jiaren Department of Physics Huazhong University of Science and TechnologyWuhan 430074 Department of Physics Xiangtan UniversityXiangtan 411105

The interaction between nonlinear Schrödinger solitons is derived by the least action principle approach as a potential function of the soliton's separation and their initial relative phase,which shows clearly how the solitons interact with each *** solitons with the same initial phase always attract each other,while those of opposite phase *** method developed in this paper can be extended to deal with interaction between solitons of other nonlinear equations.

关键词： equations solitons nonlinear

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

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

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

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：