Lijun Geng

ORCID: 0000-0003-3694-791X
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About
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Research Areas
  • Nanocluster Synthesis and Applications
  • Supramolecular Self-Assembly in Materials
  • Luminescence and Fluorescent Materials
  • Advanced Chemical Physics Studies
  • Multicomponent Synthesis of Heterocycles
  • Inorganic Chemistry and Materials
  • Retinal Development and Disorders
  • Synthesis and Biological Evaluation
  • Synthesis and biological activity
  • Polydiacetylene-based materials and applications
  • Retinal Diseases and Treatments
  • Photochromic and Fluorescence Chemistry
  • Molecular Sensors and Ion Detection
  • Magnetism in coordination complexes
  • Glaucoma and retinal disorders
  • Asymmetric Synthesis and Catalysis
  • Organometallic Complex Synthesis and Catalysis
  • Boron and Carbon Nanomaterials Research
  • Hydrogen Storage and Materials
  • Catalytic Processes in Materials Science
  • Chemical Synthesis and Analysis
  • Metal-Organic Frameworks: Synthesis and Applications
  • Polyoxometalates: Synthesis and Applications
  • Advanced biosensing and bioanalysis techniques
  • Connexins and lens biology

Guilin Medical University
2016-2025

Chinese Academy of Sciences
2019-2024

Beijing National Laboratory for Molecular Sciences
2019-2024

State Key Laboratory for Structural Chemistry of Unstable and Stable Species
2019-2024

Hebei University of Science and Technology
2011-2024

Institute of Chemistry
2019-2024

University of Chinese Academy of Sciences
2019-2023

Shanghai University of Traditional Chinese Medicine
2022

State Administration of Traditional Chinese Medicine of the People's Republic of China
2022

Shanghai Medical College of Fudan University
2021

Herein, ditopic ligand DTA comprised of terpyridine and acetylene segments with only one aromatic π-conjugated building block was designed synthesized. Driven by metal-ligand coordination interactions, we presented that the use metal salts can direct self-assembly in generation fluorescent electrochemical polymers entrapped water to form ambidextrous hydrogels. These were characterized several approaches including titrations, UV-vis, circular dichroism, X-ray diffraction spectra as well...

10.1021/acs.inorgchem.7b01031 article EN Inorganic Chemistry 2017-06-20

Tailoring materials with prescribed properties and regular structures is a critical challenging research topic. Early transition metals were found to form supermagic M8C12 metallocarbohedrenes (Met-Cars); however, stable metal carbides are not limited this common stoichiometry. Utilizing self-developed deep-ultraviolet laser ionization mass spectrometry, here, we report strategy generate new titanium by reacting pure Tin clusters acetylene. Interestingly, two products corresponding Ti17C2...

10.1021/jacs.4c01068 article EN cc-by-nc-nd Journal of the American Chemical Society 2024-03-20

Open AccessCCS ChemistryRESEARCH ARTICLE1 Dec 2021Superatomic Signature and Reactivity of Silver Clusters with Oxygen: Double Magic Ag17– Geometric Electronic Shell Closure Baoqi Yin†, Qiuying Du†, Lijun Geng, Hanyu Zhang, Zhixun Luo, Si Zhou Jijun Zhao Yin† State Key Laboratory for Structural Chemistry Unstable Stable Species, Institute Chemistry, Chinese Academy Sciences, Beijing 100190 University 100049 †B. Yin Q. Du contributed equally to this work.Google Scholar More articles by author...

10.31635/ccschem.020.202000719 article EN cc-by-nc CCS Chemistry 2020-12-15

Metal clusters with tunable magnetism and chemical activity are ideal models to study magnetic order changes from microstructures macroscopic substances, understand the spin effect in diverse catalytic reactions, create information carriers of qubits quantum computation. Precise preparation, reaction, characterization provide a platform spin-exchange interactions geometrical/electronic structure–property relationships; thus, they beneficial for rational design development new cluster-genetic...

10.1021/acs.jpclett.3c03637 article EN The Journal of Physical Chemistry Letters 2024-02-09

Biomolecule-based hydrogels have potential use in a wide range of applications such as controlled drug release, tissue engineering, and biofabrication.

10.1039/c8nr08532c article EN Nanoscale 2019-01-01

This report describes how the luminescence of naphthalimide could be tuned by various physical stimuli, including heat, sonication, and grinding. Herein, instant switchable control color fluorescent emissions has been achieved sonication-triggered gelation an organic liquid with naphthalimide-based organogelators (N3-N7). Green emissive suspensions gelators in liquids are transformed into orange gels upon brief irradiation ultrasound emission wavelength red-shift approximately 60 nm...

10.1021/acsami.5b08402 article EN ACS Applied Materials & Interfaces 2015-10-13

Herein, we report the versatile ways to prepare both low-molecular weight hydrogels and polymeric based on various types of supramolecular interactions, starting from a simple amphiphilic terpyridine-based molecule TPYA. Notably, that stable radicals can be generated by light or heat irradiation in hydrogen bonding interactions between −COOH PAA terpyridine motif TPYA for first time. The generation is confirmed EPR UV–vis experiments, process accompanied significant color changes white dark...

10.1021/acsami.9b02592 article EN ACS Applied Materials & Interfaces 2019-05-07

We have developed an integrated instrument combining deep ultraviolet laser ionization mass spectrometry (DUV-LIMS) and infrared multiphoton dissociation (IR-MPD) spectroscopy, abbreviated as DUV-IR. The 177.3 nm DUV (7 eV single-photon energy) has short pulse duration (15 ps) appropriate energy (∼20 µJ), which is found to be highly efficient for low-fragment photoionization of neutral metal clusters molecules. A home-made cluster source designed with adjustable formation channel suitable...

10.1063/1.5108994 article EN Review of Scientific Instruments 2019-07-01

Hydrogen evolution reaction (HER) is known as the heart of various energy storage and conversation systems renewable sources. Here we observe cluster reactions a light transition metal, vanadium, with water in gas-phase flow tube reactor. While HER products V1 V2 were not observed, effective on neutral Vn (n ≥ 3) clusters reveals reasonable size-dependent reactivity vanadium clusters. Superatomic features dynamics V10, V13, V16 are highlighted. Among three typical superatoms, V10 exhibit an...

10.1021/acs.jpclett.0c03809 article EN The Journal of Physical Chemistry Letters 2021-02-05

Probing atomic clusters with magic numbers is of supreme importance but challenging in cluster science. Pronounced stability a metal often arises from coincident geometric and electronic shell closures. However, transition do not simply abide by this constraint. Here, we report the finding magic-number Rh19- prominent inertness sufficient gas-collision reactions. Photoelectron spectroscopy experiments global-minimum structure search have determined geometry to be regular Oh‑[Rh@Rh12@Rh6]-...

10.1126/sciadv.adi0214 article EN cc-by-nc Science Advances 2023-08-16

Gas-phase metal clusters have been a subject of research interest for allowing reliable strategies to explore the stability and reactivity materials at reduced sizes with atomic precision. Here we prepared well-resolved copper cluster anions Cun– (n = 7–37) systematically studied their O2, NO, CO. We found remarkable an open-shell Cu18–, which is comparable closed-shell Cu17– Cu19– within picture electronic shell model. Even without having magic number valence electrons, intriguingly,...

10.1021/acs.jpclett.0c01643 article EN The Journal of Physical Chemistry Letters 2020-06-29

Water and its interactions with metals are closely bound up human life, the reactivity of metal clusters water is fundamental importance for understanding hydrogen generation. Here a prominent evolution reaction (HER) single molecule on vanadium Vn+ (3 ≤ n 30) observed in cationic at room temperature. The combined experimental theoretical studies reveal that wagging vibrations V-OH group give rise to readily formed V-O-V intermediate states (n ≥ 3) allow terminal interact an adsorbed atom,...

10.1038/s42004-020-00396-9 article EN cc-by Communications Chemistry 2020-10-30

Solar steam generation (SSG) is regarded as an efficient approach for harnessing solar energy to purify polluted or saline water. Herein, we demonstrate a hydrogel composed of cellulose nanofibers (CNFs), polyethylenimine (PEI), and reduced graphene oxide (rGO) that functions independent generator, which shows enhanced water evaporation efficiency by incorporating silver nanoparticles (AgNPs). It presented the presence AgNPs increases photothermal conversion thermal conductivity evaporator...

10.1021/acs.langmuir.4c00570 article EN Langmuir 2024-06-20

purpose. To demonstrate the production of hemoglobin by human retinal pigment epithelium (RPE). methods. Proteomic analysis using 10 donor eyes identified as a major constituent soluble RPE proteome. Western blot analysis, RT-PCR, and immunocytochemistry were used to confirm results. The presence erythrocyte-specific proteins within primary cytosol was investigated rule out phagocytosis source hemoglobin. ELISA determine rate secretion from cells. Globin mRNA expression studied in comparison...

10.1167/iovs.07-1372 article EN Investigative Ophthalmology & Visual Science 2009-03-25

Association between ACE gene I/D polymorphism and the risk of overweight/obesity remains controversial. We investigated possible relationship obesity in Chinese type 2 diabetes mellitus (T2DM) patients. In this study, was defined as a body mass index (BMI) value ≥ 25 kg/m subjects were classified into 4 groups (lean, normal, overweight, obese). PCR (polymerase chain reaction) used to detect T2DM Metabolic measurements including blood glucose, lipid profile, pressure obtained. Frequencies...

10.1155/2016/7420540 article EN cc-by Disease Markers 2016-01-01

Exploring stable clusters to understand structural evolution from atoms macroscopic matter and construct new materials is interesting yet challenging in chemistry. Utilizing our newly developed deep-ultraviolet laser ionization mass spectrometry technique, here we observe the reactions of neutral cobalt with oxygen find a very cluster species Co13O8 that dominates distribution presence large flow rate gas. The results global-minimum search reveal unique cubic structure distinctive stability...

10.1093/nsr/nwaa201 article EN cc-by National Science Review 2020-08-26

Ferromagnets constructed from nanometals of atomic precision are important for innovative advances in information storage, energy conversion, and spintronic microdevices. Considerable success has been achieved designing molecular magnets, which, however, challenging preparation may suffer drawbacks on the incompatibility high stability strong ferromagnetism. Utilizing a state-of-the-art self-developed mass spectrometer homemade laser vaporization source, we have highly efficient pure iron...

10.1021/jacs.3c09690 article EN Journal of the American Chemical Society 2023-12-02

To study the effects of JWH015, a CB2-selective agonist, on aqueous humor outflow facility, to investigate whether functional CB2 cannabinoid receptors are expressed in trabecular meshwork cells, and these involved enhancement facility induced by JWH015.A porcine anterior segment perfused organ culture model was used measure JWH015 facility. Immunofluorescence microscopy, Western blot analysis, mitogen-activated protein (MAP) kinase activity assays were expression cultured cells coupling...

10.1167/iovs.04-0651 article EN Investigative Ophthalmology & Visual Science 2005-05-24

In this work, two naphthalimide-based compounds, 1a and 1b, have been designed synthesized. Both compounds can form stable two-component gels in n-propanol or n-butanol upon addition of α-cyclodextrin (α-CD) followed by sonication at room temperature. Interestingly, the 1a/α-CD gel is thixotropic very sensitive to water. Addition a small amount water induces rapid collapse, allowing further development as visual relative humidity sensor. Specificity sensor has confirmed using several...

10.1021/acs.langmuir.6b04401 article EN Langmuir 2017-01-11

We are aimed to systematically assess the worldwide trend in incidence of childhood type 1 diabetes mellitus (CT1DM) from 1965 2012 and discuss whether climate affect CT1DM. searched relevant literatures detail judge effect different climates on The included Mediterranean, monsoon, oceanic, continental, savanna, rainforest. According climates, we further researched factor such as sunshine durations latitudes. overall CT1DM 72 countries was 11.43 (95% CI 10.31-12.55) per 100,000 children/yr....

10.1038/s41598-017-12954-8 article EN cc-by Scientific Reports 2017-10-04

A new kind of terpyridine-based Ca<sup>2+</sup> sensor <bold>TS</bold> was designed and studied based on the internal charge transfer (ICT).

10.1039/c5sm01851j article EN Soft Matter 2015-01-01
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