检索结果-南通市图书馆

Nano Research 2023年第7期16卷 10652-10659页

作者： Xinli Shi Yucong Zu Xilin Li Tongyi Zhao Hao Ren Fuxing Sun State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin UniversityChangchun 130012China

Metal-organic frameworks(MOFs)with HKUST-like tbo structures have been paid specific attention for gas sorption and separation because of their specific pore features.According to the geometric similarity of spirobifluorene and[Cu_(2)(O_(2)CR)_(4)]paddlewheel secondary building units(Cu_(2)SBUs)in HKUST-1,we attempted to rationally construct a HKUST-like MOF by a substitution strategy.Using a judiciously designed octatopic carboxylate ligand,a copper-organic framework,JUC-220,was synthesized.The crystals of JUC-220 exhibited characteristic features in cubic with disorder,possibly due to the disorder substitution and high symmetry of tbo topology.Two related HKUST-like structure models were considered.Thanks to the suitable pore size and specific pore shapes,the adsorption selectivities of JUC-220 for C_(3)H_(8)/CH_(4)(5/85)and C_(2)H_(6)/CH_(4)(10/85)gas mixtures were as high as 736 and 46 respectively at 298 K and 1 bar.Specially,JUC-220 exhibited excellent trace adsorption performance of C_(3)H_(8)and C_(2)H_(6)as well as reverse adsorption behavior of C_(2)H_(6)/C_(2)H_(4).Thus,JUC-220 serves as an example of HKUST-like MOF with disorder for light hydrocarbons separation and the implementation of substitution which can be used to explore more porous MOFs.

关键词： HKUST-like metal-organic frameworks(MOFs) reticular chemistry disorder substitution trace adsorption light hydrocarbons separation

Electrochemical conversion of furfural to furoic acid:a more stable,efficient and energy-saving system

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China chemistry 2022年第12期65卷 2576-2587页

作者： Xinxin Li Linchuan Cong Haibo Lin Fangbing Liu Fuyu Han Nan Lin State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin UniversityChangchun130012China

The paired electrolytic system is constructed by combining the valuable organic electro-oxidation and electro-reduction reactions,which can replace the ineffective water splitting half-reaction.By reducing the energy consumption of the electrolytic cell,the value-added electrolysis is realized.The indirect electrolysis method greatly reduces the dependence of the organic electrolysis reaction on electrode potential by introducing the redox mediators,which solves the problem on the matching of anode and cathode current under potentiostatic conditions.Here,we report a more stable,efficient and energy-saving linear paired electrochemical synthesis system that can simultaneously convert furfural to furoic acid at both the anode and cathode at higher current densities.Stable three-dimensional networked PbO_(2)is used as the anode and the catalytic amount of 2,2,6,6-tetramethyl-1-piperidinyloxy(TEMPO)is used as the mediator to realize the efficient conversion of furfural to furoic acid in a wide potential range.The cathode catalyzes two-electron oxygen reduction to hydrogen peroxide using Pb/RHPC gas-diffusion electrode,which mediates the oxidation of furfural to furoic acid simultaneously.In potentiostatic electrolysis,the selectivity of the furoic acid in the cathode and anode is 33.2%and 99.3%,respectively,and the total electron efficiency is 127.1%.The properties of the cathode and anode remain stable after the long-time electrolysis in a flow cell.By choosing a stable anode with high oxygen evolution overpotential and a gas-diffusion cathode with high hydrogen evolution overpotential,the electrolytic cell can be operated efficiently and stably by introducing reasonable mediated reactions.The two half-reactions have good compatibility during the electrolysis process,saving energy consumption by about 12.3%,for certain industrial application prospects.

关键词： furfural furoic acid paired electrolytic system indirect electrosynthesis

Boosting selective C_(2)H_(2)/CH_(4),C_(2)H_(4)/CH_(4) and CO_(2)/CH_(4) adsorption performance via 1,2,3-triazole functionalized triazine-based porous organic polymers

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2022年第2期35卷 64-72页

作者： Xionghui Liu Jianfeng Du Yu Ye Yuchuan Liu Shun Wang Xianyu Meng Xiaowei Song Zhiqiang Liang Wenfu Yan State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin UniversityChangchun 130012China

Nitrogen-rich porous organic polymers have shown great potentials in gas adsorption/separation,photocatalysis,electrochemistry,sensing and so on.Herein,1,2,3-triazole functionalized triazine-based porous organic polymers(TT-POPs)have been synthesized by the copper-catalyzed azide-alkyne cycloaddition(Cu-AAC)polymerization reactions of 1,3,5-tris(4-azidophenyl)-triazine with 1,4-diacetylene benzene and 1,3,5-triacetylenebenzene,respectively.The characterizations of N2 adsorption at 77 K show TTPOPs possess permanent porosity with BET surface areas of 666 m^(2)·g^(-1)(TT-POP-1)and 406 m^(2)·g^(-1)(TT-POP-2).The adsorption capacities of TT-POPs for CO_(2),CH4,C2H2 and C2H4,as well as the selective separation abilities of CO_(2)/N2,CO_(2)/CH_(4),C_(2)H_(2)/CH_(4) and C_(2)H_(4)/CH_(4) were evaluated.The gas selective separation ratio of TT-POPs was calculated by the ideal adsorbed solution theory(IAST)method,wherein the selective separation ratios of C_(2)H_(2)/CH_(4) and C_(2)H_(4)/CH_(4) of TT-POP-2 was 48.4 and 13.6(298 K,0.1 MPa),which is comparable to other adsorbents(5.6–120.6 for C_(2)H_(2)/CH_(4),10–26 for C_(2)H_(4)/CH_(4)).This work shows that the 1,2,3-triazole functionalized triazine-based porous organic polymer has a good application prospect in natural gas purification.

关键词： Porous organic polymers Triazole CO_(2)capture Light hydrocarbons Gas separation Natural gas purification

Postsynthetic functionalization of covalent organic frameworks

在线全文

学校读者我要写书评

暂无评论

National Science Review 2020年第1期7卷 170-190页

作者： Yusran Yusran Xinyu Guan Hui Li Qianrong Fang Shilun Qiu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Departement of Chemistry Jilin University

Covalent organic frameworks(COFs) have been at the forefront of porous-material research in recent years. With predictable structural compositions and controllable functionalities, the structures and properties of COFs could be controlled to achieve targeted materials. On the other hand, the predesigned structure of COFs allows fruitful postsynthetic modifications to introduce new properties and functions. In this review, the postsynthetic functionalizations of COFs are discussed and their impacts towards structural qualities and performances are comparatively elaborated on. The functionalization involves the formation of specific interactions(covalent or coordination/ionic bonds) and chemical reactions(oxidation/reduction reaction) with pendant groups, skeleton and reactive linkages of COFs. The chemical stability and performance of COFs including catalytic activity, storage, sorption and opto-electronic properties might be enhanced by specific postsynthetic functionalization. The generality of these strategies in terms of chemical reactions and the range of suitable COFs places them as a pivotal role for the development of COF-based smart materials.

关键词： covalent organic frameworks crystalline materials porous materials postsynthetic functionalization

Calcination-controlled fabrication of carbon dots@zeolite composites with multicolor fluorescence and phosphorescence

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2022年第10期15卷 9454-9460页

作者： Siyu Zong Bolun Wang Xin Yin Wenyan Ma Jiani Zhang Jiyang Li State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China

In light of the exceptional optical qualities,luminous carbon dots(CDs),particularly those with room-temperature phosphorescence(RTP),have a wide range of applications in a variety of fields.However,modulating afterglow emissions practically and efficiently remains a serious difficulty.Herein,a feasible strategy of calcination combined with in-situ synthesis is proposed to fabricate CDs-based composites with multicolor fluorescence(FL)and phosphorescence.Through pre-selection of small pore RHO zeolite as a matrix,CDs have been successfully embedded due to strong guest–host interaction achieved by insitu hydrothermal synthesis.By the unique pore architecture and excellent stability of the zeolite matrix,the surface oxidation degree and the carbon core size of confined CDs are engineered by temperature-controlled calcination.The resulting composites exhibit tunable FL(from 416 to 566 nm)and RTP(from 440 to 585 nm)in solid and aqueous solution,in which rarely occurring deep blue RTP is observed with a lifetime as long as 573 ms.Furthermore,the universality of such a calcination-modulated luminescent method has been proved by the AFI zeolite matrix.This study offers up a new way to regulate the luminescence of CDs facilitated by matrix,which considerably promotes the potential applications of CDs-based composites in the future.

关键词： carbon dots zeolite tunable phosphorescence calcination modulation host-guest

Low-energy adsorptive separation by zeolites

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Science Review 2022年第9期9卷 120-134页

作者： Ruobing Bai Xiaowei Song Wenfu Yan Jihong Yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University International Center of Future Science Jilin University

Separation of mixture is always necessarily required in modern industry, especially in fine chemical,petrochemical, coal chemical and pharmaceutical industries. The challenge of the separation process is usually associated with small molecules with very similar physical and chemical properties. Among the separation techniques, the commonly used high-pressure cryogenic distillation process with combination of high pressure and very low temperature is heavily energy-consuming, which accounts for the major production costs as well as 10–15% of the world’s energy consumption. To this end, the adsorptive separation process based on zeolite sorbents is a promising lower-energy alternative and the performance is directly determined by the zeolite sorbents. In this review, we surveyed the separation mechanisms based on the steric, equilibrium, kinetic and ‘trapdoor’ effect, and summarized the recent advances in adsorptive separation via zeolites including CO2, light olefins, C8aromatics and hydrogen isotopes. Furthermore, we provided the perspectives on the rational design of zeolite sorbents for the absolute separation of mixtures.

关键词： zeolites adsorptive separation olefin/paraffin separation CO2 separation hydrogen isotope separation

New perspective on the synthesis of highly efficient composites:regulating influence distance of interfacial charge transfer

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science Bulletin 2018年第4期63卷 203-205页

作者： Keke Huang Zhibin Geng Yu Sun Shouhua Feng State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University

Interface effect is one of the central topics for decades[1–3].For inorganic composites,interface effect is mainly induced by interface stress[4]and interface charge transfer[4–6],in which interface charge transfer ... 详细信息

关键词：费用距离界面调整合成电子状态化学性质接口

Two Indium(III)-based Fluorescent Metal-Organic Frameworks for Highly Sensing Fe^(3+),2,4-DNP,and TNP

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2024年第1期40卷 119-126页

作者： WANG Dan LI Wen LI Guanghua HUA Jia LIU Yunling state key laboratory of inorganic synthesis&preparative chemistry Jilin UniversityChangchun130012P.R.China

Two novel metal-organic frameworks(MOFs),JLU-MOF130([In(NH2−BDC)(Imi)(1H−Imi)]·DMF·H2O,NH2−H2BDC=2-aminobenzene-1,4-dicarboxylic acid,1H−Imi=1H-imidazole,DMF=N,N-dimethylformamide)and JLU-MOF131([In(1,4-NDC)(Imi)(1H−Imi)]·DMF0.5,1,4-H_(2)NDC=1,4-naphthalene-dicarboxylic acid),were synthesized.JLU-MOF130 features a three-dimensional(3D)architecture with a neb topology.JLU-MOF131 is characterized by a two-dimensional(2D)structure with an sql topology.JLU-MOF130 has excellent fluorescence detection performance towards Fe^(3+),2,4-dinitrophenol(2,4-DNP),and 2,4,6-trinitrophenol(TNP),but the fluorescence detection performance of JLU-MOF131 is further improved by converting NH2−H2BDC to more conjugated 1,4-H_(2)NDC.The Stern-Volmer(SV)quenching constant(KSV)values of JLU-MOF130 sensing 2,4-DNP,TNP,and Fe^(3+)are 5.24×10^(4),4.44×10^(4),and 4.73×10^(3) L/mol,respectively.The corresponding limit of detection(LOD)values are 1.17,1.36,and 14.59µmol/L.The KSV values for JLU-MOF131 are 1.26×10^(5),9.02×10^(4),and 8.48×103 L/mol,and the corresponding LOD values are 0.35,0.42,and 3.60µmol/L,respectively.interestingly,the emission wavelengths of the two MOFs obviously shift as the fluorescence emission intensities decrease upon the addition of 2,4-DNP and TNP,which can be applied in selective detection.

关键词： Metal-organic framework Fluorescence quenching Fe^(3+) 2 4-Dinitrophenol(2 4-DNP) 2 4 6-Trinitrophenol(TNP)

Biomass-based Carbon Dots as Peroxidase Mimics for Colorimetric Detection of Glutathione and L-Cysteine

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6期38卷 1446-1452页

作者： LIU Junxue WANG Yufei MA Wenyan ZONG Siyu LI Jiyang State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun130012P.R.China

Biomass-carbon dots(named as B-CDs) have been successfully prepared via facile one-step hydrothermal reflux treatment at a low temperature from passion fruit peel. The as-prepared B-CDs had a uniform sphere morphology and size of 1–3 nm, which possessed rich nitrogen/oxygen-containing functional groups. B-CDs could imitate peroxidase and accelerate the reaction process of H2O_(2) oxidizing the substrate 3,3’,5,5’-tetramethylbenzidine(TMB), which caused an obvious color change in the solution due to the oxidization of achromic TMB into blue oxidation product(ox-TMB) with an absorption peak at 652 nm. Furthermore, the product could be further reduced to native colorless TMB by the reducing agent glutathione or L-Cysteine. Thus, depending on the peroxidase-like properties of B-CDs, we developed a colorimetric approach to detecting both glutathione and L-Cysteine, which showed superior selective and sensitive detection towards glutathione and L-Cysteine in a linear range of 0–20 µmol/L. The limits of detection were 0.62 and 0.58 µmol/L, respectively.

关键词： Carbon dot Biomass Colorimetry Glutathione Cysteine

Precisely Composition Controlled synthesis of Cu0.5Ni0.5 Alloy with Optimum Catalytic Activity

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 Journal of Structural chemistry 2017年第12期36卷 2033-2043页

作者：徐兴良李莉萍张丹罗家俊李广社 State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University

Alloys based on non-noble metals could be the next generation of high-performance catalysts for many chemical reactions. However, precisely composition controlled synthesis of non-noble alloys remains a significant challenge. In this work, we report a simple synthesis of Cu_（0.5）Ni_（0.5） alloys without any component segregation. Its success relies on the use of Cu–Ni oxalate precursors, which are chelated in the proximity by oxalate ligands. One of the attractive features for the oxalate routes of catalyst preparation is that no classical support material is needed. The actual component ratios of the obtained Cu_（0.5）Ni_（0.5） alloy are consistent with the initial ratio. Cu_（0.5）Ni_（0.5） alloy shows a higher catalytic activity than pure Cu and Ni catalysts in the reduction of p-nitrophenol（4-NP） to p-aminophenol（4-AP） by sodium borohydride（NaBH4） in an aqueous solution, and the performance depends strongly on the strong interaction between Cu and Ni. The findings reported here are highly helpful to understand the relationship between the synergistic effects in alloys and their catalytic performance, and therefore could provide appropriate strategies to obtain desirable catalysts with improved activity in various catalytic applications.

关键词： catalytic reduction CuNi bimetallic alloy p-nitrophenol NaBH4