检索结果-南通市图书馆

Decorating Covalent Organic Frameworks with High-density Chelate Groups for Uranium Extraction

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

Chemical Research in Chinese Universities 2022年第2期38卷 433-439页

作者： QIN Xudong TANG Xiaohui MA Yu XU Hong XU Qing yang weiting GU Cheng State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesSouth China University of TechnologyGuangzhou 510640P.R.China Key Laboratory of Advanced Materials of Tropical Island Resources Ministry of EductionSchool of Chemical Engineering and TechnologyHainan UniversityHaikou 570228P.R.China CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research Institute(SARI)Chinese Academy of Sciences(CAS)Shanghai 201210P.R.China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084P.R.China Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates South China University of TechnologyGuangzhou 510640P.R.China

The extraction of uranium from aqueous solution is highly desirable for sustaining the increasing demand for environmental safety and nuclear ***,we report a strategy using a two-step covalent modification for the synthesis of covalent organic frameworks(COFs)with high-density amidoxime chelate groups at *** introduction of dense amidoxime groups plays a pivotal role in uranium *** resulting COF exhibits strong affinity with the distribution coefficient of 5.2×104 mL/g and a high adsorption capacity of 319.9 mg/*** strategy could be expanded to identify and remove different contaminants by introducing special functional groups.

关键词： Two-step post-synthetic modification High-density amidoxime Uranium adsorption

A multi-responsive luminescent sensor towards Fe_(3+) and acetone based on a Cd-containing metal–organic framework

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 2016年第4期27卷 497-501页

作者： Ting Wang Qing-Hui Liu Ying Gao Xiu-Yun yang weiting yang Song Dang Zhong-Ming Sun Changchun University of Science & Technology School of Chemistry and Environmental Engineering State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences College of Physics Jilin University

A Cd-containing metal–organic framework（Cd L）, formula as {[Cd_3（L）_2（H_2O）_6] 1.5DMF}, has been synthesized under solvothermal condition by the reaction of 4,40,400-（methylsilanetriyl）tribenzoic acid（H_3L） and Cd^（2＋）ion. Single-crystal X-ray diffraction reveals that Cd L displays a three-dimensional framework with 2-fold interpenetration and DMF molecules locate in the void space of the channels. A topological analysis of the framework indicates Cd Lisa 3,4-connected pto net. The photoluminescence properties of Cd L are systematically studied in detail. Impressively, Cd L shows excellent detection performance towards Fe^（3＋）ion and acetone in the sensing experiments, which undoubtedly demonstrates the great potential of Cd L as a highly selective multi-responsive luminescent sensor for the detection of organic solvents and metal ions.

关键词： Metal–organic framework Fluorescent probe Multi-responsive sensor Luminescent quenching

Heterometallic zinc uranium oxyfluorides incorporating imidazole ligands

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2015年第6期26卷 641-645页

作者： Xiao-Xiao Liu Yuan Wang Wan-Guo Tian weiting yang Zhong-Ming Sun Changchun University of Science & Technology School of Chemistry and Environmental Engineering State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences

Two heterometallic uranium oxyfluorides with hybrid networks were hydrothermally synthesized by incorporating two imidazoles, 1-（biphenyl-4-yl）-lH-imidazole （bpi） and 1,4-di（1H-imidazol-l-yl）ben- zene （dib）, formulated as Zn（bpi）2（UO2）2（H2O）F6 （1） and Zn（dib）（UO2）F4-0.5H20 （2）. Compound 1 consists of chains of edge-sharing UO2F5 and UO2F4（H20） pentagonal bipyramids, which are linked by Zn（bpi）2 moieties to form the sheet structure with decorated bpi. While in compound 2, sheets of edge- sharing dimers of UO2F5 pentagonal bipyramids and ZnF3N2 polyhedra are linked by dib, creating a pillared three-dimensional framework. The two compounds represent the few examples of heterometallic uranium oxyfluorides incorporating organic ligands. The syntheses, structure as well as the IR spectra, UV-vis spectra and luminescent properties of the bimetallic uranium oxyfluorides are studied.

关键词： Uranium Imidazole Crystal structure Luminescence

Layered and three-dimensional uranyl–organic assemblies with 4,4′-oxidiphthalic acid

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2016年第3期27卷 325-329页

作者： Dai Wu Ying Gao Wan-Guo Tian Yun-Hui Li weiting yang Zhong-Ming Sun School of Chemistry and Environmental Engineering Changchun University of Science & Technology Changchun 130022 China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

Hydrothermal reactions of uranyl nitrate and 4,4＇-oxidiphthalic acid（H4L） resulted in the formation of three new uranyl-organic framework materials,namely（NH4）2[（UO2）3（L）2]·5H2O（1）,（NEt4）[（UO2）3（H2O）（L）（HL）]（2） and（UO2）7（H2O）2（phen）4（L）2（HL）2（3）（NEt4 = tetraethylammonium,phen = 1,10-phenanthroline）.These three structures all comprise common uranyl pentagonal *** 1,UO7polyhedra are linked by hexadentate ligands to form a 3D framework with 1D channels,in which are located NH4^＋ ions and water *** in 2,the organic ligands adopt pentadentate and hexadentate coordination modes,ligating UO7 units to create a layered structure with channels filled by NEt4^＋ *** 3,uranyl square bipyramids are also accommodated together with pentagonal bipyramids,which are linked by tetradentate carboxylate ligands to produce the layered *** molecules also coordinate to the uranyl centers to build up the *** studies indicate that 2 and 3 exhibit the characteristic uranyl emission.

关键词： Uranyl–organic assemblies Carboxylates Structures Luminescence

Face-directed Strategy for the Construction of Polyoxovanadate-based Metal-Organic Tetrahedra

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2023年第6期39卷 954-959页

作者： CHEN Huiping GONG Yaru CHU Qiangqiang PANG Xiao HUANG Xiaojing TIAN Xudong yang weiting PAN Qinhe SU Zhongmin WANG Xinlong Key Laboratory of Advanced Materials of Tropical Island Resources Ministry of EducationSchool of ScienceHainan UniversityHaikou 570228P.R.China School of Chemical Engineering and Technology Hainan UniversityHaikou 570228P.R.China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012P.R.China

Polyoxometalate-based metal-organic polyhedra(MOPs)were of particular concern because of the various exquisite building blocks and the suitable constructional *** further understand the design and particularity of polyoxovanadate-based MOPs,(NH_(2)Me)_(8){[V_(6)O_(6)(OCH_(3))_(9)(C_(6)H_(5)PO_(3))]_(4)·(BPT)_(4)}·2DMF(HNU-74)and(NH_(2)Me)12{[V_(6)O_(6)(OCH_(3))_(9)(C_(6)H_(5)PO_(3))]4·(HBCBAIP)_(4)}(SO_(4))_(2)·MeOH·DMF(HNU-75)were constructed by a face-directed synthesis *** structures were assembled with four secondary building units as vertexes and four organic ligands served as *** from HNU-74,HNU-75 showed a carboxyl group free during the coordination process,resulting in the pore channels being blocked and the free carboxyl group linking outwards,paving the way for the formation of the 3D *** to the pore channels of HNU-74,the adsorption of I2 was studied and the adsorption capacity was 148 mg/g.

关键词： Metal-organic polyhedron Face-directed strategy Tetrahedral structure Iodine adsorption

Hydrothermal in situ ligand reaction affording a novel uranylcarboxyphosphonate:synthesis,structure and simulation

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

Hydrothermal in situ ligand reaction affording a novel urany...

A metal-organic gel-based fluorescent chemosensor for selective Al3+ detection

中国化学会第九届全国无机化学学术会议

作者： weiting yang Zhong-Ming Sun State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences

A novel uranyl carboxyphosphonate（H2dipy）[（UO2）3（H2O）2（H2DPTP）2]·2H2O[H6DPTP=2,5-diphosphonoterephthalic acid,dipy=4,4’-bipyridine]has been synthesized under hydrothermal *** carboxyphosphonate ligand was formed through the in situ oxidation of（2,5-dimethyl-1,4-phenylene）diphosphonic acid mediated by UO22+.Single crystal X-ray diffraction analyses reveal that this compound incorporates common UO7 pentagonal bipyramids and less common UO6 square bipyramids,which are ligated by the carboxyphosphonate ligands forming a layered *** the adjacent uranyl carboxyphosphonate layers protonated dipy cations are located and balance the *** computational investigations give an insight into the nature of bonding interactions between uranium（VI）and carboxyphosphonate *** spectroscopic properties including IR,Uv-vis and fluorescence have also been studied.

关键词： uranyl carboxyphosphonate in situ ligand reaction structure

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

A metal-organic gel-based fluorescent chemosensor for select...

Organic-Inorganic Hybrid Materials for Rapid Adsorption and Selective Separation of Methylene Blue from Aqueous Solution

中国化学会第十届全国无机化学学术会议

作者： Dongxu Gu weiting yang Fuxiang Wang Qinhe Pan School of Science Hainan University

As an important metal element,aluminium has an important impact on environment and human health,thus the detection of Alhas become a hot *** this paper,we synthesized a Ni(Ⅱ)-based metal-organic gel (Ni-MOG),which can serve as an Alfluorescence sensor with high selectivity and *** addition,a composite film was further fabricated by hybridization of this Ni-MOG with polyvinyl *** composite film produced a rapid fluorescence response to Alsolutions at concentrations above 5×10 M in 5 *** effective detection of Alprovides a new insight into the water quality monitoring and has potential application value.

关键词： Ni-MOG Fluorescence Al3+-Chemosensor Composite film

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

Organic-Inorganic Hybrid Materials for Rapid Adsorption and ...

中国化学会第九届全国无机化学学术会议

作者： Zhong-Ming Sun Fei-Yan Yi weiting yang Dai Wu Jian-Ping Li State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences

In daily life, a large number of dye-wastewater discharged pose a significant threat to the water environment and human health due to their toxicity and even carcinogenic.1-4 Therefore, the removal of these dyes is extremely important, but it will be more attractive and challenging if the recovery and recycling of raw materials can be realized for at the same time. A series of Ln Cu-polyoxmetalates（POMs） were used as dyed wastewater treatment with rapid（within 1 min） and large-scale adsorption（up to 391.3 mg/g） as well as excellently selective separation for cationic dyes. Furthermore, the adsorbed dyes can be easily desorbed, and the POMs still work very well after three cycles（Fig.1）.

关键词： Hybrid materials uranium adsorption methylene blue sepreation

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

铁路车站咽喉区道岔自动分组方法研究

铁道学报 2023年第6期45卷 9-15页

作者：陈维亚杨伟婷石晓琪鲁佳琪中南大学交通运输工程学院湖南长沙4100752 中南大学轨道交通大数据湖南省重点实验室湖南长沙410075

咽喉区道岔分组不仅是运用利用率计算法查定铁路车站咽喉通过能力的必要步骤,还是车站进路选择、股道运用等行车技术作业的关键环节。为解决当前自动分组方法不能有效解决复杂咽喉区非水平方向布置道岔的分组问题,将咽喉区道岔分组问题... 详细信息

咽喉区道岔分组不仅是运用利用率计算法查定铁路车站咽喉通过能力的必要步骤,还是车站进路选择、股道运用等行车技术作业的关键环节。为解决当前自动分组方法不能有效解决复杂咽喉区非水平方向布置道岔的分组问题,将咽喉区道岔分组问题抽象为有向图中点的归属问题,构建咽喉有向图模型和道岔分组有向图模型,设计二阶段法对模型求解。第一阶段识别平行进路,目标是基于咽喉有向图运用DFS算法识别并生成平行进路对全集;第二阶段为判断道岔归属,目标是基于进路判断法及道岔坐标设计初分、调整、检验等计算步骤判断道岔归属并生成道岔组。以某个布置复杂的技术站咽喉为例,对本文所提出方法进行检验,结果表明该方法能够快速准确地实现咽喉道岔自动分组,有利于铁路数字化设计和智能化生产管理。

关键词：铁路车站道岔自动分组二阶段法有向图深度优先搜索算法