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Harnessing Electrostatic Interactions for Enhanced Conductivity in Metal-Organic Frameworks

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Research 2021年第1期2021卷 1543-1553页

作者： An-An Zhang Xiyue Cheng Xu He Wei liu Shuiquan Deng Rong Cao tian-fu liu Department of Chemistry School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefeiAnhui 230026China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002China University of the Chinese Academy of Sciences Beijing 100049China

The poor electrical conductivity of metal-organic frameworks(MOFs)has been a stumbling block for its applications in many important ***,exploring a simple and effective strategy to regulate the conductivity of MOFs is highly ***,anionic guest molecules are incorporated inside the pores of a cationic MOF(PFC-8),which increases its conductivity by five orders of magnitude while maintaining the original *** contrast,the same operation in an isoreticular neutral framework(PFC-9)does not bring such a significant *** studies reveal that the guest molecules,stabilized inside pores through electrostatic interaction,play the role of electron donors as do in semiconductors,bringing in an analogous n-type semiconductor mechanism for electron ***,we demonstrate that harnessing electrostatic interaction provides a new way to regulate the conductivity of MOFs without necessarily altering the original porous *** strategy would greatly broaden MOFs’application potential in electronic and optoelectronic technologies.

关键词： structure conductivity electrostatic

Stable hydrogen-bonded organic frameworks and their photo-and electro-responses

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Nano Research 2024年第8期17卷 7675-7699页

作者： Ying Hou Xin-Song Huang Sheng-Hao Gong Chen liu Yangyang liu tian-fu liu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China Department of Chemistry and Biochemistry California State UniversityLos AngelesCalifornia 90032USA College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China

Hydrogen-bonded organic frameworks(HOFs)are a recent class of porous materials that have garnered considerable research interest owing to their distinctive *** can be constructed through judicious selection of H-bonding motifs,which are further enforced by other weak intermolecular interactions such asπ–πstacking,van der Waals forces,and framework *** advantage of these interactions,we can expand the functional field of HOFs by introducing active ***,researchers have made substantial advancements in using HOFs for chemical sensing,catalysis,proton conduction,biological applications,and *** low bonding energy of H-bonds allows for precise control over the concentration of ligands in solvents,forming diverse HOF *** varied structures offer significant advantages for producing HOFs with photo-responsive and electro-responsive ***,the presence of H-bonds in HOFs results in their inherent lower stability compared to metal-organic frameworks(MOFs)and covalent-organic frameworks(COFs)formed via coordination and covalent bonds,*** a result,the pursuit of stable and innovative HOF materials with novel functional sites remains an ongoing *** review provides an overview of recent research progress in the development of new strategies for stable HOF synthesis and applications of HOFs with stimuli-responsive *** first classified all synthetic methods reported to date and discussed the stable HOFs synthesized,as well as their unique properties and *** addition,we summarized the applications of HOFs utilizing their synergistic responses to external stimuli,including photo,electrical,pressure,and chemical *** systematically reviewed stable HOF synthesis and applications,which may lead to a deeper understanding of the structure–activity relationship for these materials and guide future HOF design.

关键词： stable hydrogen-bonded organic frameworks(HOFs) photo-response electro-response photoelectric synergistic response

Lithium film with abundant stepped structures: A promising route for homogeneous Li ion deposition to conquer lithium dendrite issue and its action mechanism

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Journal of Energy Chemistry 2022年第9期31卷 166-175,I0006页

作者： Yong Zhang Shu-Qin Song Yong Gao tian-fu liu Hong Zhao Department of Materials Science and Engineering Dalian Jiaotong UniversityDalian 116028LiaoningChina The Key Lab of Low-carbon Chemistry&Energy Conservation of Guangdong Province PCFM LabSchool of Materials Science and EngineeringSun Yat-sen UniversityGuangzhou510275GuangdongChina Institute of Science and Technology for New Energy Xi'an Technological UniversityXian 710021ShaanxiChina Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023LiaoningChina

Lithium is considered to be the ‘‘holy grail” for the application of energy storage due to its highest theoretical capacity and lowest anode potential. However, one of the grand difficulties in the development of lithium-based batteries is the lithium dendrite growth that leads to capacity fading and electrode degradation over long-term cycling. Compared with conventional electrolyte modifications, artificial solid electrolyte interfaces(SEI) synthesis and framework designing approaches, tuning surface morphology of lithium anode is the direct route to induce homogeneous Li ion deposition. Due to the high chemical activity of lithium metal, however, controllable growth of lithium micro/nanostructures by traditionally chemical approaches is still a big challenge. Herein, we have developed a facile compression route to fabricate lithium anode with abundant stepped lithium structures. The electrochemical results demonstrate that the dendritic growth issue is effectively suppressed by orderly arranged stepped lithium structures. After 90 cycles, a high discharge capacity of 954 mAh g^(-1) is achieved, which is 2.7times that of the uncompressed lithium anode(342 mAh g). First-principles calculations reveal that the orderly arranged stepped lithium structures are lithiophilic active sites to adsorb Li ion, which contributes to homogeneous deposition of Li ion on lithium anode, eventually solving the lithium dendrite issue. This work paves a new road to suppress dendritic growth, which will provide some new ideas to design long recycling sodium, potassium and zinc, and other metal anode batteries.

关键词： Lithium dendrite Steps/edges Active sites Compression

Post-modification of metal-organic framework for improved CO_(2) photoreduction efficiency

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Chinese Chemical Letters 2023年第3期34卷 490-493页

作者： An-An Zhang Rui Wang Hai-Bo Huang tian-fu liu Rong Cao Department of Chemistry School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350002China

Utilizing metal-organic frameworks(MOFs) to design photocatalysts for CO_(2) reduction catalysts is an excellent idea but currently restricted by the relatively low activity. Enhancing CO_(2) affinity and tuning the oxidation state of metal clusters in MOFs might be a solution to improve the catalytic ***, the Cl-bridge atoms in the metal clusters of a cobalt MOF were easily exchanged with OH-,which simultaneously oxidized a portion of Co(Ⅱ) to Co(Ⅲ) and resulted in a much enhanced photocatalytic activity for CO_(2) reduction. In contrast, the original framework does not exhibit such superior activity. Comprehensive characterizations on their physicochemical properties revealed that the introduction of hydroxyl group not only greatly increases the CO_(2) affinity but also alters the oxidation state of metal clusters, resulting in significantly improved photocatalytic activities for CO_(2) reduction. This work provides important insight into the design of efficient photocatalysts.

关键词： Metal-organic framework Post-modification Hydroxyl group Ion exchange CO_(2)photoreduction

Hydrogen-bonded organic framework core–shell composite for synergistic antimicrobial therapy

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Aggregate 2024年第2期5卷 457-462页

作者： Jian Xiao Acharya Ramachandra Mahammed Shaheer Chen liu tian-fu liu Rong Cao State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouChina School of Physical Science and Technology ShanghaiTech UniversityShanghaiChina University of Chinese Academy of Sciences BeijingChina

Hydrogen-bonded organic frameworks(HOFs)are crystalline porous materials with permanent voids formed via self-assembly of organic molecules through hydrogen bonding and intermolecular *** combination of HOFs with functional material would broaden their application horizon but were less explored in existing ***,a highly porous and photosensitive HOF was successfully coated onto upconversion nanoparticles(UCNPs)to construct a core-shell structure named UNCPs@*** enhance spectral overlap and maximize energy conversion efficiency,this study utilized the Er and Tm co-doped UCNPs,which can effectively convert infrared light into visible light emission thereby exciting the porphyrin *** investigation reveals that the composite exhibits significant photodynamic and photothermal effects under infrared *** by its noticeable photoactivity,UCNPs@PFC-73-Ni was evaluated as an antibacterial agent against Escherichia ***,significant antibacterial efficacy was observed,highlighting the potential of UCNPs@PFC-73-Ni as an effective antibacterial agent under infrared light irradiation.

关键词： hydrogen-bonded organic frameworks photodynamic therapy photothermal therapy upconversion nanoparticles

Novel ABCB4 mutations in an infertile female with progressive familial intrahepatic cholestasis type 3:A case report

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World Journal of Clinical Cases 2022年第6期10卷 1998-2006页

作者： tian-fu liu Jing-Jing He Liang Wang Ling-Yi Zhang Department of Hepatology Lanzhou University Second HospitalLanzhou 730030Gansu ProvinceChina

BACKGROUND Mutations that occur in the ABCB4 gene,which encodes multidrug-resistant protein 3,underlie the occurrence of progressive familial intrahepatic cholestasis type 3(PFIC3).Clinical signs of intrahepatic cholestasis due to gene mutations typically first appear during infancy or *** of PFIC3 occurring in adults are *** SUMMARY This is a case study of a 32-year-old infertile female Chinese patient with a 15-year history of recurrent abnormal liver *** primary clinical signs were elevated levels of alkaline phosphatase andγ-glutamyl *** possible reasons for liver dysfunction were eliminated in this patient,resulting in a diagnosis of *** diagnosis was confirmed using gene detection and histological *** using genetic sequencing analysis indicated the presence of two novel heterozygous mutations in the ABCB4 gene,namely,a 2950C>T;p.A984V mutation(exon 24)and a 667A>G;p.I223V mutation(exon 7).After receiving ursodeoxycholic acid(UDCA)treatment,the patient's liver function indices improved,and she successfully became pregnant by in vitro ***,the patient developed intrahepatic cholestasis of pregnancy in the first ***,treatment with UDCA was safe and *** These novel ABCB4 heterozygous mutations have a variety of clinical *** follow-up is essential for a comprehensive understanding of PFIC3.

关键词： Progressive familial intrahepatic cholestasis type 3 ABCB4 gene Infertility Intrahepatic cholestasis of pregnancy Case report

Changes of groundwater flow field of Luanhe River Delta under the human activities and its impact on the ecological environment in the past 30 years

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China Geology 2021年第3期4卷 455-462页

作者： She-ming Chen fu-tian liu Zhuo Zhang Qian Zhang Wei Wang tianjin Center China Geological SurveyTianjin 300170China tianjin Agricultural University Tianjin 300170China

The Luanhe River Delta is located in the center of the Circum-Bohai Sea Economic *** enjoys rapid economic and social development while suffering relatively water *** overexploitation of groundwater in the Luanhe River Delta in recent years has caused the continuous drop of groundwater level and serious environmental and geological *** study systematically analyzes the evolution characteristics of the population,economy,and groundwater exploitation in the Luanhe River Delta and summarizes the change patterns of the groundwater flow regime in different aquifers in the Luanhe River Delta according to previous water resource assessment data as well as the latest groundwater survey *** comparison of major source/sink terms and groundwater resources,the study reveals the impacts of human activities on the groundwater resources and ecological environment in the study area over the past 30 years from 1990 to *** results are as *** average annual drop rate of shallow groundwater and the deep groundwater in the centers of depression cones is 0.4 m and 1.64 m,respectively in the Luanhe River Delta in the past 30 *** depression cones of shallow and deep groundwater in the study area cover an area of 545.32 km^(2)and 548.79 km^(2),respectively,accounting for more than 10%of the total area of the Luanhe River *** of groundwater has further aggravated land *** a result,two large-scale subsidence centers have formed,with a maximum subsidence rate of up to 120 mm/*** drop of groundwater level has induced some ecological problems in the Luanhe River Delta area,such as the zero flow and water quality deterioration of rivers and continuous shrinkage of natural wetlands and ***,the proportion of natural wetland area to the total wetland area has been decreased from 99%to 8%and the water area from 1776 km^(2)to 263 km^(2).These results will provide data for groundwater overexploitation contr

关键词： Ecological environment Human activities Groundwater flow regime Groundwater resources Groundwater depression cone Land subsidence Hydrogeology survey engineering Luanhe River Delta Hebei Province North China

SELECTIVE　REDUCTION　OF　NITROARENE　MEDIATED　BY　AN　INSOLUBLE　RESIN　WITH　VIOLOGEN　STRUCTURE　AS　ELECTRON-TRANSFER　CATALYST

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Chinese Chemical Letters 1995年第9期6卷 745-746页

作者： fu tian liu Hong LI Bing Lin HE(Institute of Polymer Chemistry, Nankai University, tianjin 300071) Nankai Univ Inst Polymer Chem Tianjin 300071 Peoples R China

Abstract: : The substituted nitroarenes were reduced effectively to the corresponding aniline deriva tives by an insoluble resin with viologen structure as an electron-transfer catalyst(ETC) in dichloromethane-resin... 详细信息

关键词： AS ELECTRON-TRANSFER STRUCTURE VIOLOGEN CATALYST WITH BY AN

Precise Construction of Stable Bimetallic Metal–Organic Frameworks with Single-Site Ti(IV) Incorporation in Nodes for Efficient Photocatalytic Oxygen Evolution

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CCS Chemistry 2022年第8期4卷 2782-2792页

作者： Lan Li Zhi-Bin Fang Wenzhuo Deng Jun-Dong Yi Rui Wang tian-fu liu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002 University of Chinese Academy of Sciences Beijing 100049 CAS Key Laboratory of Design and Assembly of functional Nanostructures and fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002

Assembling the reactive low-cost Co clusters and photoresponsive ligands in the form of metal–organic frameworks(MOFs)is a promising strategy to construct efficient water-oxidizing photocatalysts,but it is restricted by poor water *** high valent cations in the clusters to build heterometallic Co-MOFs might be a solution,yet a precise fabrication strategy is still challenging.

关键词： cobalt catalyst metal–organic frameworks single-site Ti incorporation stability photocatalytic O_(2)evolution