Junjie Xin

ORCID: 0000-0002-1575-5508
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Research Areas
  • Crystallization and Solubility Studies
  • X-ray Diffraction in Crystallography
  • Metal-Organic Frameworks: Synthesis and Applications
  • Covalent Organic Framework Applications
  • Advanced battery technologies research
  • Enzyme Structure and Function
  • Electrocatalysts for Energy Conversion
  • Luminescence and Fluorescent Materials
  • Fuel Cells and Related Materials
  • Catalysis and Hydrodesulfurization Studies
  • Zeolite Catalysis and Synthesis
  • Advanced Photocatalysis Techniques
  • Thermochemical Biomass Conversion Processes
  • Inorganic Chemistry and Materials
  • Crystal Structures and Properties
  • Antibiotics Pharmacokinetics and Efficacy
  • Analytical chemistry methods development
  • Organic and Molecular Conductors Research
  • Physics of Superconductivity and Magnetism
  • Stochastic Gradient Optimization Techniques
  • Advanced Condensed Matter Physics
  • Lubricants and Their Additives
  • Pharmaceutical and Antibiotic Environmental Impacts
  • Perovskite Materials and Applications
  • Inorganic Fluorides and Related Compounds

Beijing National Laboratory for Molecular Sciences
2021-2025

Peking University
2021-2025

Guangxi University
2024

State Key Laboratory of Rare Earth Materials Chemistry and Application
2022

Harbin Institute of Technology
2022

Two-dimensional (2D) covalent organic frameworks (COFs) are composed of structurally precise, permanently porous, layered macromolecular sheets, which traditionally synthesized as polycrystalline solids with crystalline domain lengths smaller than 100 nm. Here, we polymerize imine-linked 2D COFs suspensions faceted single crystals in little 5 min at moderate temperature and ambient pressure. Single two were prepared, consisting a rhombic COF (TAPPy-PDA) hexagonal (TAPB-DMPDA). The sizes...

10.1021/jacs.2c07166 article EN Journal of the American Chemical Society 2022-10-20

Dimensional isomers, defined in reticular chemistry as frameworks consisting of identical molecular building blocks but extended two or three dimensions (2D 3D), are an important type framework isomers that have never been isolated. Herein, we report the crystallization dimensional covalent organic (COFs) for first time. By polymerization same at different temperatures, both 2D and 3D COFs were successfully constructed due to temperature-induced conformational changes precursors from planar...

10.1021/jacs.3c01729 article EN Journal of the American Chemical Society 2023-05-11

Herein, we report the introduction of steric hindrance in molecular building blocks to prevent π···π stacking, thus allowing two-dimensional (2D) covalent organic sheets form three-dimensional (3D) frameworks (COFs) through entanglement. Starting from rationally designed precursors containing a bulky anthracene unit vertical direction, highly crystalline COF (3D-An-COF) was successfully synthesized. Very interestingly, 3D-An-COF determined as an entangled 2D square net (sql) structure, and...

10.1021/jacs.3c06159 article EN Journal of the American Chemical Society 2023-08-16

Developing cost-effective and sustainable acidic water oxidation catalysts requires significant advances in material design in-depth mechanism understanding for proton exchange membrane electrolysis. Herein, we developed a single atom regulatory strategy to construct Co-Co dinuclear active sites (DASs) that atomically dispersed zirconium doped Co9 S8 /Co3 O4 heterostructure. The X-ray absorption fine structure elucidated the incorporation of Zr greatly facilitated generation DASs layer with...

10.1002/anie.202314185 article EN Angewandte Chemie International Edition 2023-10-20

Abstract The development of facile methods for constructing highly active, cost‐effective catalysts that meet ampere‐level current density and durability requirements an oxygen evolution reaction is crucial. Herein, a general topochemical transformation strategy posited: M‐Co 9 S 8 single‐atom (SACs) are directly converted into M‐CoOOH‐TT (M = W, Mo, Mn, V) pair‐sites under the role incorporating atomically dispersed high‐valence metals modulators through potential cycling. Furthermore, in...

10.1002/adma.202302642 article EN Advanced Materials 2023-07-12

Dynamic covalent organic frameworks (COFs) represent an emerging class of porous materials with inherent structural flexibility. However, due to the challenges in their synthesis and characterization, research on dynamic COFs remains at early stage requires further exploration. Herein, we report designed a novel COF entangled 2D layers that exhibits interesting behavior response vapor exposure. By employing continuous rotation electron diffraction technique, precisely resolved crystal...

10.1021/jacs.4c17962 article EN Journal of the American Chemical Society 2025-02-14

New hexacyanidometallates with the formula A 2 [MFe(CN) 6 ]· x H O (A = Na, K; M Mg, Ca, Sr and Ba) were determined to adopt unexpectedly low-symmetric structures which has been demonstrated as n-type semiconductors.

10.1039/d3dt00384a article EN Dalton Transactions 2023-01-01

Two-dimensional redox-active covalent organic frameworks (COFs) hold promise for diverse applications in catalysis, energy storage, sensing, and optoelectronics. However, precisely determining their structures poses a significant challenge, because of small particle sizes low crystal quality, which limit the fundamental understanding intrinsic properties. In this study, we present structure analysis 2D COF based on Ni–bis(dithiolene) units imine bonds, namely, Ni-PDA-COF. Crystals Ni-PDA-COF...

10.1021/acsmaterialslett.4c00078 article EN ACS Materials Letters 2024-02-11

Abstract Developing cost‐effective and sustainable acidic water oxidation catalysts requires significant advances in material design in‐depth mechanism understanding for proton exchange membrane electrolysis. Herein, we developed a single atom regulatory strategy to construct Co−Co dinuclear active sites (DASs) that atomically dispersed zirconium doped Co 9 S 8 /Co 3 O 4 heterostructure. The X‐ray absorption fine structure elucidated the incorporation of Zr greatly facilitated generation...

10.1002/ange.202314185 article EN Angewandte Chemie 2023-10-20

The constructure of a heterostructured interface is an effective way to design highly durable and efficient water oxidation electrocatalysts. Herein, Cu/CuCN with heterointerfaces the first synthesized case through simple epitaxial-like growth method, displaying superior activity stability under pH-universal media. Associated high electron transport transfer epitaxial interfacial area, pre-catalyst applied deliver oxygen evolution reaction (OER) lower overpotentials 250 mV (forward scan) 380...

10.1021/acsami.1c01424 article EN cc-by ACS Applied Materials & Interfaces 2021-05-21

The high consumption and emission of sulfonamide antibiotics (SAs) have a considerable threat to humans ecosystems, so there is need develop safer more effective methods than conventional strategies for the optimal removal these compounds. In this study, four SAs with different substituents, sulfadiazine (SDZ), sulfamerazine (SMR), sulfamethoxazole (SMX), sulfamethazine (SMZ) were removed by pure culture Paenarthrobacter ureafaciens YL1. effect initial concentration on growth rate strain YL1...

10.3390/fermentation8120742 article EN cc-by Fermentation 2022-12-14
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