检索结果-南通市图书馆

Producing circularly polarized luminescence by radiative energy transfer from achiral metal-organic cage to chiral organic molecules

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

Chinese Chemical Letters 2024年第8期35卷 498-502页

作者： Zhao-Xia Lian Xue-Zhi Wang Chuang-Wei Zhou Jiayu Li Ming-De Li Xiao-Ping Zhou Dan Li College of Chemistry and Materials Science Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and ApplicationsJinan UniversityGuangzhou 510632China College of Chemistry and Chemical engineering Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong ProvinceShantou UniversityShantou 515063China

The development of circularly polarized luminescence(cpl)materials with high performance is signifi-cantly ***,we develop a facial strategy for fabricating a cpl-active system by employing an achiral luminescent metal-organic cage(MOC)and chiral boron dipyrromethene(BODIPY)*** is achieved by taking advantage of the radiative energy transfer process,in which BODIPY molecules act as energy acceptors and MOCs act as *** cpl performance(maximum luminescence dissymme-try factor up to±1.5×10^(−3))can be tuned by adjusting the ratio between MOCs and ***-light emission with the cpl feature is obtained by using a ternary system including MOC,chiral BODIPY,and Rhodamine *** present work provides a facile and universal strategy to construct a cpl-active system by integrating achiral luminophores and chiral molecules.

关键词： Circularly polarized luminescence Metal-organic cage Radiative energy transfer Chiral small molecules Bodipy Chirality

Circularly Polarized Luminescence-Active Triarylborons with Charge-transfer Characteristics

在线全文

学校读者我要写书评

暂无评论

Circularly Polarized Luminescence-Active Triarylborons with ...

Wireless Relay Communication on High Speed Railway：Full Duplex or Half Duplex？

中国化学会·第十六届全国有机合成化学学术研讨会

作者：赵翠华 Meng-Yuan Zhang Zheng-Hua Zhao Zuo-Bang Sun 山东大学 School of Chemistry and Chemical engineering Shandong University

Circularly polarized luminescence(cpl) is potentially useful in optical spintronics,optical data storage,3D displays,and as well as chirality *** with the widely investigated chiral transition-metal complexes,organic heclical polymers and supra molecular assemblies,the cpl-active small organic molecules(cpl-SOMs) possess many advantages,such as high fluorescence quantum yield,facile structural modification,finely tunable emission wavelength,and ease of manufacturing ***,the cpl-SOMs have recently received rapidly increasing research interest. Promoted by the interesting emission properties of charge-transfer(CT) emitting triarylborons,such as high solid-state fluorescence efficiency,red-shifted emission,significant fluorescence solvatochromism,and high sensitivity to Lewis basic fluoride, we are interested in the modification of π-conjugated framework with electron-accepting dimesitylboryl and electron-donating amino groups(Figure 1).It was found it is possible to obtain cpl-SOMs exhibiting high solid fluorescence efficiency,solvent and fluoride-stimulated switchable cpl through this ***,we would like to report our preliminary results on the triarylboron-based cpl-SOMs,including the [2.2]paracyclophane,[5]helicene and 1,1’-binaphthyl derivatives.

关键词： circularly polarized Iuminescence small organic molecules triarylboron charge-transfer

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

China Communications 2016年第11期13卷 14-26页

作者： Jia You Zhangdui Zhong Zhongzhao Dou Jing Dang Gongpu Wang State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China School of Computer and Information Technology Beijing Jiaotong University Beijing China School of Electronic and Information engineering South China University of Technology Guangzhou China Air Force Military Representative Office in Hua Bei Beijing China

In this paper,we introduce one full-duplex(FD) relaying transmission scheme for high speed railway and compare its ergodic capacity and outage performance with half-duplex(HD) relaying scheme. Both decode-and-forward(DF) amplify-and-forward(AF) relay modes are considered. Moreover,the carriage penetration loss(cpl) and the self-interference(SI) cancellation ratio are investigated. We derive the closed-form expressions for the outage probability and ergodic capacity of both HD and FD relay transmission schemes. It is shown that when cpl is larger than a certain level,the FD relay can achieve better performance in terms of capacity and keep the outage probability in a low level. It is also found that three factors: AF or DF modes,cpl and SI cancellation ratio,can have impact on capacity performance,and that cpl is one decisive factor. Our results can provide theoretical supports for development and deployment of future wireless communication systems on high speed railways.

关键词： full duplex relay high speed railway mobile relay outage probability channel capacity

Recent progress in circularly polarized multi-resonance thermally activated delayed fluorescence materials for organic light-emitting diodes

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2024年

作者： He Jiang Dan Ai Jibiao Jin Zheng Xie Wai-Yeung Wong Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic University School of Chemistry and Chemical engineering University of Jinan The Hong Kong Polytechnic University Shenzhen Research Institute

Circularly polarized luminescence(cpl) is of importance to advance science and technology with significant potential applications in information storage, spintronics and optoelectronic devices. Integrating cpl and the emission mechanism of thermally activated delayed fluorescence(TADF) has attracted considerable attention, because of their 100% internal quantum efficiency in theory and easily modified molecular structures for tunable photo-electrical properties. However, the typical donor-acceptor(D-A) architecture of CP-TADF emitters generally induces a broad emission profile with inferior color purity due to their large structural relaxation under the processes of excitation and emission. Recently, CP-multi-resonance(MR)-TADF emitters that concurrently display cpl activity, narrowband emission and high efficiency are emerging as the most suitable candidates for the next-generation organic light-emitting diode(OLED) display. In this review, the progress of CP-MR-TADF materials is reviewed in terms of the molecular design strategy, the common relationship between the molecular structures and optoelectronic properties, and their OLEDs performance. Finally, the opportunities and challenges in this research topic are discussed.

关键词：

Highly efficient catalyzed by imidazolium-based dual-sulfonic acid functionalized ionic liquids for liquid phase Beckmann rearrangement:experiments and COSMO-RS calculations

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Green Chemical engineering 2024年第1期5卷 108-118页

作者： Xin Guo Zhiyuan Wang Ye Yang Jiahui Zhang Yanduo Liu Zhiyuan Mu Siqi Jiang Chunxiao Ren Dan Lv Yufeng Hu Zhichang Liu State Key Laboratory of Heavy Oil Processing and High Pressure Fluid Phase Behavior&Property Research Laboratory China University of PetroleumBeijing102249China School of Chemistry and Materials Science University of Science and Technology of ChinaHefei230026China School of Light Industry and engineering South China University of TechnologyGuangzhou510641China

A production technique with the high yield and environmentally friendly process need be developed forε-Caprolactam(cpl)in the chemical *** technology is highly desired to design and synthesize high--performance catalysts for liquid phase Beckmann rearrangement of cyclohexanone oxime(CHO)to *** this work,3-methyl-1-(propyl-4-sulfonyl)imidazolium methanesulfonate([PHSO_(3)MIM][MSA])with highly efficient and excellent yield is synthesized *** the optimum molar ratio of ZnCl_(2)over[PHSO_(3)MIM][MSA]was 0.02,it exhibits the high selectivity(94%)of cpl at 90℃for 1 ***,Fourier-transform infrared(FT-IR)investigations show that the functional Br∅nsted-Lewis acidic types of ionic liquids(ILs)are formed by the uniformly distributed ZnCl_(2)and[PHSO_(3)MIM][MSA].In addition,the hydrogen bond(H-bond)is formed between CHO and *** ten reaction cycles,no significant structure changes are observed in the recovered[PHSO_(3)MIM][MSA]-ZnCl_(2).The solubilities of ILs are predicted by using COSMO-RS model,the results show that[PHSO_(3)MIM][MSA]is a promising candidate for the liquid phase Beckmann rearrangement of CHO into ***,a theoretical model of the H-bond interactions between ILs and CHO is further confirmed to support the advance of reaction mechanism.A feasible way is provided for the cpl production technique in the liquid phase Beckmann rearrangement reaction.

关键词： Liquid phase Beckmann rearrangement Imidazolium-based ionic liquids COSMO-RS calculations H-bond

Chiroptical properties and supramolecular assemblies of chiral aggregation induced emission molecules

在线全文

学校读者我要写书评

暂无评论

Chiroptical properties and supramolecular assemblies of chir...

Chlorine-substituted chiral 2D perovskite microwires with enhanced lattice rigidity for sensitive circularly polarized light detection

中国化学会第八届全国分子手性学术研讨会

作者： Shan Xue Hongkun Li Rongsen Wen Bing Shi Li Ben Zhong Tang School of Chemistry and Environmental engineering Shenzhen Univeristy Department of Chemistry Hongkong University of Science & Technology

Chirality exists universally in nature and is expressed at hierarchical *** can be induced by chiral atoms in chiral molecules and special molecular shapes in achiral molecules as *** chirality hybridizes with fluorescence cooperatively of molecules,they generate circular dichroism（AICD） and circularly polarized luminescence（cpl）.Hereby,we provide our work on the CD,cpl and self-assembling behavior of achiral hexaphenylsilole（HPS） and chiral amino acid containing HPS and phenanthro[9,10-d]imidazole,PIM,*** achiral molecule HPS showed aggregation induced CD and cpl,which is generated by aggregation of the propeller HPS molecules.[1] The introduction of chiral amino acid attachments successfully induce chirality of HPS[2] and PIM scaffold as verified with the intensive AICD and cpl properties of the resultant molecules.[3] The chirality of the above three kinds of molecules is also amplified on the supramolecular level as the formation of helical fibers which has blue fluorescence.

关键词： chiral HPS circula dichroism(CD),circular polarized luminescence(cpl)

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

Science China Chemistry 2023年第12期66卷 3602-3610页

作者： Meng Yuan Yuchen Qiu Yingjie Zhao Yuyan Zhao Hui Li Xiao Wei Gaosong Chen Jiangang Feng Hanfei Gao Jinjin Zhao Jiahui Zhao Lei Jiang Yuchen Wu Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China College of Chemistry Zhengzhou UniversityZhengzhou 450001China College of Chemistry Jilin UniversityChangchun 130012China Key Laboratory for Special Functional Materials of Ministry of Education National and Local Joint Engineering Research Center for High-Efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng 475004China University of Chinese Academy of Sciences(UCAS) Beijing 100049China Department of Electrical and Computer engineering National University of SingaporeSingapore 117585Singapore Suzhou Institute for Advanced Research University of Science and Technology of ChinaSuzhou 215123China Ji Hua Laboratory Foshan 528000China Department of Physics Shanxi Datong UniversityDatong 037009China

Chiral two-dimensional(2D) perovskites offer numerous attractive features for optoelectronics owing to their soft, deformable lattices and a high degree of chemical tunability. While tremendous advances have been made in perovskite-based direct circularly polarized light(cpl) detection, the low circular polarization anisotropy factor and sensitivity of those photodetectors arising from large lattice distortion still limit practical applications. Herein, chiral 2D perovskite-based single-crystalline microwire arrays with enhanced circular dichroism(CD) absorption are fabricated with the synergy of the capillary-bridgeconfined assembly method and chlorine-substituted phenethylamine(Cl-MBA). Compared with phenethylamine(MBA)-inserted perovskites, the smaller lattice distortion and increased halogen–halogen interaction within Cl–MBA-inserted perovskites strengthen lattice rigidity and weaken electron–phonon coupling to improve carrier transport and thermal stability, resulting in high-performance cpl photodetectors with an anisotropy factor of 0.25, responsivity exceeding 95.7±9.3 A W^(-1)and detectivity exceeding(3.05±0.30)×10^(13)Jones. This work opens a new perspective to modulate circular polarization sensitivity and will be helpful to realize promising implementations in quantum computation and communication.

关键词： chiral perovskites microwire arrays lattice rigidity circular polarization photodetectors

Symmetry breaking of highly symmetrical nanoclusters for triggering highly optical activity

在线全文

学校读者我要写书评

暂无评论

Fundamental Research 2024年第1期4卷 63-68页

作者： Xiao Wei Hao Li Honglei Shen Chuanjun Zhou Shuxin Wang Xi Kang Manzhou Zhu Department of Chemistry and Centre for Atomic engineering of Advanced Materials Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationInstitutes of Physical Science and Information Technology and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials.Anhui UniversityHefei 230601China

Developing new approaches to fulfill the enantioseparation of nanocluster racemates and construct cluster-based nanomaterials with optical activity remains highly desired in cluster science,because it is an essential prerequisite for fundamental research and extensive applications of these *** herein propose a strategy termed“active-site exposing and partly re-protecting”to trigger the symmetry breaking of highly symmetrical nanoclusters and to render cluster crystals optically *** vertex PPh_(3)of the symmetrical Ag_(29)(SSR)_(12)(PPh_(3))_(4)(SSR=1,3-benzenedithiol)nanocluster was firstly dissociated in the presence of counterions with large steric hindrance,and then the exposed Ag active sites of the obtained Ag_(29)(SSR)_(12)nanocluster were partly re-protected by Ag^(+),yielding an Ag_(29)(SSR)_(12)-Ag_(2)nanocluster with a symmetry-breaking ***_(29)(SSR)_(12)-Ag_(2)followed a chiral crystallization mode,and its crystal displayed strong optical activity,derived from CD and cpl ***,this work presents a new approach(i.e.,active-site exposing and partly re-protecting)for the symmetry breaking of highly symmetrical nanoclusters,the enantioseparation of nanocluster racemates,and the achievement of highly optical activity.

关键词： Atomically precise nanocluster Symmetry breaking Enantioseparation Circularly polarized luminescent Photoluminescence

Boosting Circularly Polarized Luminescence of Organic Conjugated Systems via Twisted Intramolecular Charge Transfer

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

Research 2020年第1期2020卷 593-602页

作者： Junfeng Li Chenxi Hou Chao Huang Shanqi Xu Xuelei Peng Qi Qi Wen-Yong Lai Wei Huang Key Laboratory for Organic Electronics and Information Displays Institute of Advanced Materials(IAM)Nanjing University of Posts and Telecommunications9 Wenyuan RoadNanjing 210023China School of Chemistry and Chemical engineering Southeast UniversityNanjing 211189China Shaanxi Institute of Flexible Electronics(SIFE) Northwestern Polytechnical University(NPU)127 West Youyi RoadXi’an710072 ShaanxiChina

Realizing a high luminescence dissymmetry factor(g_(lum))is a paramount yet challenging issue in the research field of circularly polarized luminescence(cpl).Here,we reported a novel set of organic conjugated systems with twisted intramolecular charge transfer(TICT)characteristics based on conjugated o-carborane-binaphthyl dyads composing of binaphthyl units as chiral electron donors and o-carborane units as achiral electron acceptors,demonstrating intense cpl with large g_(lum) ***,single-crystalline o-1 exhibited a high-level brightness and a large g_(lum) factor as high as+0.13,whereas singlecrystalline o-2 processed a relatively low brightness with a decreased g_(lum) value *** significant diversity of cpl-active properties was triggered by the selective introduction of o-carborane units onto the binaphthyl *** from the large magnetic dipole transition moments in TICT states,the cpl activity of TICT o-carborane-based materials exhibited amplified circular *** study provides an efficient molecular engineering strategy for the rational design and development of highly efficient cpl-active materials.

关键词： materials circular conjugated