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| 1 | Uncovering growth species of multivariate MOFs in liquid phase by mass spectrometry显示文摘The unveiling of MOF growth mechanism is hampered by the lack of fundamental knowledge about the very early stage of nucleation,especially the form and ratio of molecular species in the solution for crystal growth.Herein,we report the detection of growth species for a series of MOFs with mono-linker,CuMOF-2-BDC and Cu-MOF-2-NDC,and two linkers,MTV-MOF-2-(C_(4)H_(4))x,by high resolution ESI-MS,where a large variety of Cu-containing species are identified unambiguously.The solvent molecules such as H_(2)O,methanol and DMF participate in the formation of these species,other than ethanol.Furthermore,in the growth solution of MTV-MOF-2-(C_(4)H_(4))x,growth species containing two different organic linkers are observed.The feeding ratio is not the only factor controlling the distribution of growth species for MTVMOFs,but also the solvent involves in coordination,an aspect usually overlooked previously. | Jinli Han Suming Chen Xiaochun Zhou Hexiang Deng | 2022 | Chinese Chemical Letters2022，33，8： | 2 |
| 2 | Covalent organic frameworks for optical applications显示文摘Linking molecules into extended crystalline networks to construct covalent organic frameworks(COFs)added in variety to the readily thriving research on moleculebased solid-state materials,featured by classic polymers and molecular crystals.Compared to the development of COFs for gas separation,energy storage,and conversion,where the porosity feature of COFs is utilized,the optical applications,such as fluorescence,white light emission,and photodynamic therapy,involving the molecular and crystalline feature of COFs,are much less explored.In this review,we focused on the optical properties of COFs,and how do these macroscopic properties correlate with the microscopic structure of COFs.Other than the influence from organic functional groups in previous reviews on COFs,here,three critical structure factors,the connection,orientation,and alignment of the molecular building blocks,are outlined and associated with the optical properties of COFs.We also analyze the properties of COFs from both energy and dynamic aspects in an attempt to provide further insight into the possible underlying mechanism.At the end of this review,we also discuss the remaining challenges and future directions for the design of COFs for optical applications,and unveil the potential of COFs toward this direction. | Liang Zhang Lezhi Yi Zhi-Jun Sun Hexiang Deng | 2021 | Aggregate2021，2，3： | 1 |
| 3 | 显示文摘 | Hexiang Deng Sergio Grunder Kyle E | 2012 | Science2012，336，6084： | 1 |
| 4 | Multi-variate metal-organic frameworks 显示文摘 | Deng Hexiang Doonan C J Furukawa H | 2010 | Science2010，327，： | 1 |
| 5 | Multivariate MOF for optimizing atmospheric water harvesting显示文摘Atmospheric water harvesting offers a powerful and promising solution to address the problem of global freshwater scarcity.In the past decade,significant progress has been achieved in utilizing hydrolytically stable metal-organic frameworks as recyclable water-sorbent materials under low relative humidity,especially in those arid areas.Recently,Yaghi's group has employed a combined crystallographic and theoretical technique to decipher the water filling mechanism in MOF-303,where the polar organic linkers rather than the inorganic units of MOF are demonstrated as the key factor.Hence,the hydrophilic strength of the water-binding pocket in MOFs can be optimized through the approach of multivariate modulations,resulting in enhanced water harvesting properties. | Ao Ma Hengjiang Cong Hexiang Deng | 2022 | Green Energy & Environment2022，7，4： | 0 |
| 6 | Monodispersed covalent organic framework nanocrystals in aqueous solution for DNA inclusion显示文摘Covalent organic framework(COF)nanocrystals are useful in biological applications;however,their hydrophobic nature makes them aggregate into clusters in aqueous media.In this work,we show that by modifying the crystal surface with hydrophilic functional groups,these nanocrystals can maintain in the monodispersed form in aqueous solution.Specifically,three COFs,TPB-DMTP COF,TAPB-PDA COF and TAPB-BPDA COF were synthesized using organic Lewis acid as the catalyst,to generate nanoparticles with the size ranging from 180 nm to 1μm.2-Aminoethanesulfonic acid(AESA)was applied to react with the terminal aldehyde functional groups exposed at the surface of COF nanocrystals.The resulting negatively charged surface keeps these nanocrystals apart from each other in aqueous solution for at least 48 h.The mesopore of these COF nanocrystals allows the entering of single-strand DNA molecules and the release in the presence of complementary DNA. | Xinheng Lyu Lezhi Yi Liang Zhang Jin Liu Hexiang Deng | 2023 | Science China Chemistry2023，66，11： | 0 |
| 7 | Covalent organic frameworks catalyzed by organic Lewis acid显示文摘We report the synthesis of covalent organic framework(COF)crystals with organic Lewis acid instead of the conventional use of Br?nsted acid or inorganic Lewis acid.Specifically,tris(pentafluorophenyl)borane was applied for the growth of seven imine COFs:TAPB-PDA-,TAPB-2,5-DMTA-,TAPB-2,3-DMTA-,TAPT-PDA-,TAPT-2,5-DMTA-,TAPT-2,3-DMTA-COF with hcb topology and varied in functional groups,as well as a new one,COF-820,with sql topology.All these COFs were obtained at room temperature.Their high crystallinity and porosity demonstrate the versatility of the organic Lewis acid as a catalyst.Bulky organic Lewis acid was found critical for the production of COF-820,while its absence resulted in the formation of a different COF,4PE-1P-COF,with kgm topology using the same building blocks.Such steric effect,typical for organic catalysts,provides a new way to regulate the topology of COFs and their future design. | Xiangqian Shi Lezhi Yi Hexiang Deng | 2022 | Science China Chemistry2022，65，7： | 0 |
| 8 | Method for the extraction of circulating nucleic acids based on MOF reveals cell-free RNA signatures in liver cancer显示文摘Cell-free RNA(cf RNA) allows assessment of health, status, and phenotype of a variety of human organs and is a potential biomarker to non-invasively diagnose numerous diseases. Nevertheless, there is a lack of highly efficient and bias-free cf RNA isolation technologies due to the low abundance and instability of cf RNA.Here, we developed a reproducible and high-efficiency isolation technology for different types of cell-free nucleic acids(containing cf RNA and viral RNA) in serum/plasma based on the inclusion of nucleic acids by metal-organic framework(MOF) materials, which greatly improved the isolation efficiency and was able to preserve RNA integrity compared with the most widely used research kit method. Importantly, the quality of cf RNA extracted by the MOF method is about 10-fold that of the kit method, and the MOF method isolates more than three times as many different RNA types as the kit method. The whole transcriptome mapping characteristics of cf RNA in serum from patients with liver cancer was described and a cf RNA signature with six cf RNAs was identified to diagnose liver cancer with high diagnostic efficiency(area under curve = 0.905 in the independent validation cohort) using this MOF method. Thus, this new MOF isolation technique will advance the field of liquid biopsy, with the potential to diagnose liver cancer. | Yuqing Sun Haixin Yu Shaoqing Han Ruoxi Ran Ying Yang Yongling Tang Yuhao Wang Wenhao Zhang Heng Tang Boqiao Fu Boshi Fu Xiaocheng Weng Song-Mei Liu Hexiang Deng Shuang Peng Xiang Zhou | 2024 | National Science Review2024，11，1： | 0 |
| 9 | Reticular chemistry at the atomic,molecular,and framework scales显示文摘'There's plenty of room at the bottom.'Feynmans talk has been frequently quoted for the advent of nanoscience,which gives profound perspectives of arranging atoms in the way we want[1].With the same bottom-up manner,reticular chemistry is concerned with linking of molecular building blocks by strong bonds to make crystalline open frameworks[2].The most im portant category practicing this bottom-up strategy at framework scale is m etal-organic frameworks(MOFs)coined in 1995[3],which leads to synthetic crystals featuring ultrahigh surface areas,fine-tuned pore metrics,and multivariate functionalities[4-16].The same strategy has also been successfully extended to crystalline covalent organic frameworks(COFs)from entirely organic building blocks through strong covalent bonds[17-19],whose crystal structures are now possible to be determ ined by 3D electron diffraction[20]and even X-ray diffraction[21].Recently,molecular weaving adds exotic flavors to reticular chemistry enabling the interlacing,knitting,and crocheting with molecular threads to make resilient nanotextiles[22].We envision the future of this field lays on the anisotropic reticular chem istry[23],where the components can be precisely arranged and manipulated along a specific direction.The atomic arrangement of various metals in the structures can be eventually read. | Yue-Biao Zhang Qiaowei Li Hexiang Deng | 2021 | Nano Research2021，14，2： | 0 |
| 10 | Template-assisted synthesis of hierarchically porous Co3O4 with enhanced oxygen evolution activity显示文摘Oxygen evolution reaction(OER) is one of the most important reactions in the energy storage devices such as metal–air batteries and unitized regenerative fuel cells(URFCs). However, the kinetically sluggishness of OER and the high prices as well as the scarcity of the most active precious metal electrocatalysts are the major bottleneck in these devices. Developing low-cost non-precious metal catalysts with high activity and stability for OER is highly desirable. A facile, in situ template method combining the dodecyl benzene sulfuric acid sodium(SDBS) assisted hydrothermal process with subsequent high-temperature treatment was developed to prepare porous Co_3O_4 with improved surface area and hierarchical porous structure as precious catalysts alternative for oxygen evolution reaction(OER). Due to the unique structure, the as-prepared catalyst shows higher electrocatalytic activity than Co_3O_4 prepared by traditional thermal-decomposition method(noted as Co_3O_4-T) and commercial IrO_2 catalyst for OER in 0.1M KOH aqueous solution. Moreover, it displays improved stability than Co_3O_4-T. The results demonstrate a highly efficient, scalable, and low cost method for developing highly active and stable OER electrocatalysts in alkaline solutions. | Lan Yao Hexiang Zhong Chengwei Deng Xianfeng Li Huamin Zhang | 2016 | Journal of Energy Chemistry2016，25，1： | 0 |
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