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Wang S, Tran TH, Jia J, Feng Y. A non-classical synthetic strategy for organic mesocrystals. Front Chem 2024; 12:1454650. [PMID: 39351213 PMCID: PMC11439792 DOI: 10.3389/fchem.2024.1454650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2024] [Accepted: 08/30/2024] [Indexed: 10/04/2024] Open
Abstract
Mesocrystals are ordered nanoparticle superstructures, often with internal porosity, which receive much recent research interest in catalysis, energy storage, sensors, and biomedicine area. Understanding the mechanism of synthetic routes is essential for precise control of size and structure that affect the function of mesocrystals. The classical synthetic strategy of mesocrystal was formed via self-assembly of nanoparticles with a faceted inorganic core but a denser (or thicker) shell of organic molecules. However, the potential materials and synthetic handles still need to be explored to meet new applications. In this work, we develop a non-classical synthetic strategy for organic molecules, such as tetrakis (4-hydroxyphenyl) ethylene (TPE-4OH), tetrakis (4-bromophenyl) ethylene (TPE-4Br), and benzopinacole, to produce mesocrystals with composed of microrod arrays via co-solvent-induced crystal transformation. The aligned nanorods are grown epitaxially onto organic microplates, directed by small lattice mismatch between plates and rods. Thus, the present work offers general synthetic handle for establishing well-organized organic mesocrystals.
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Affiliation(s)
- Shaoyan Wang
- CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics Chinese Academy of Sciences (SICCAS), Shanghai, China
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore
| | - Thu Ha Tran
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Jia Jia
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis, Nanjing Tech University, Nanjing, China
| | - Yuhua Feng
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis, Nanjing Tech University, Nanjing, China
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Lam PK, Liao JJ, Lin MC, Li YH, Wang TH, Huang HK, Hsu YA, Hsieh HYP, Kuan PY, Chen CT, Hao GX, Tsung CK, Wu KCW, Šutka A, Kinka M, Chou LY, Shieh FK. Controlled Encapsulation of Gold Nanoparticles into Zr-Metal-Organic Frameworks with Improved Detection Limitation of Volatile Organic Compounds via Surface-Enhanced Raman Scattering. Inorg Chem 2023; 62:14896-14901. [PMID: 37678159 DOI: 10.1021/acs.inorgchem.3c01600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
Volatile organic compounds (VOCs) have harmful effects on human health and the environment but detecting low levels of VOCs is challenging due to a lack of reliable biomarkers. However, incorporating gold nanoparticles (Au NPs) into metal-organic frameworks (MOFs) shows promise for VOC detection. In this study, we developed nanoscale Au@UiO-66 that exhibited surface-enhanced Raman scattering (SERS) activity even at very low levels of toluene vapors (down to 1.0 ppm) due to the thickness of the shell and strong π-π interactions between benzenyl-type linkers and toluene. The UiO-66 shell also increased the thermal stability of the Au NPs, preventing aggregation up to 550 °C. This development may be useful for sensitive detection of VOCs for environmental protection purposes.
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Affiliation(s)
- Phuc Khanh Lam
- Department of Chemistry, National Central University, Taoyuan 32001, Taiwan
| | - Jian-Jie Liao
- Department of Chemistry, National Central University, Taoyuan 32001, Taiwan
| | - Miao-Chun Lin
- Department of Chemistry, National Central University, Taoyuan 32001, Taiwan
| | - Yu-Hsiu Li
- Department of Chemistry, National Central University, Taoyuan 32001, Taiwan
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Tsu-Hao Wang
- Department of Chemistry, National Central University, Taoyuan 32001, Taiwan
| | - Hsin-Kai Huang
- Department of Chemistry, National Central University, Taoyuan 32001, Taiwan
| | - Yu-An Hsu
- Department of Chemistry, National Central University, Taoyuan 32001, Taiwan
| | | | - Pu-Yun Kuan
- Department of Chemistry, National Central University, Taoyuan 32001, Taiwan
| | - Ching-Tien Chen
- Department of Chemistry, National Central University, Taoyuan 32001, Taiwan
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Guo-Xiu Hao
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Chia-Kuang Tsung
- Boston College Chemistry Department, Merkert Chemistry Center, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Kevin C-W Wu
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
- Institute of Biomedical Engineering & Nanomedicine, National Health Research Institute, Keyan Road, Zhunan, Miaoli City 350, Taiwan
| | - Andris Šutka
- Institute of Materials and Surface Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena 3/7, Riga 1048, Latvia
| | - Martynas Kinka
- Faculty of Physics, Vilnius University, Sauletekio Avenue 3, Vilnius 10257, Lithuania
| | - Lien-Yang Chou
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Fa-Kuen Shieh
- Department of Chemistry, National Central University, Taoyuan 32001, Taiwan
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Tan JD, Ramalingam B, Wong SL, Cheng JJW, Lim YF, Chellappan V, Khan SA, Kumar J, Hippalgaonkar K. Transfer Learning of Full Molecular Weight Distributions via High-Throughput Computer-Controlled Polymerization. J Chem Inf Model 2023; 63:4560-4573. [PMID: 37432764 DOI: 10.1021/acs.jcim.3c00504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/12/2023]
Abstract
The skew and shape of the molecular weight distribution (MWD) of polymers have a significant impact on polymer physical properties. Standard summary metrics statistically derived from the MWD only provide an incomplete picture of the polymer MWD. Machine learning (ML) methods coupled with high-throughput experimentation (HTE) could potentially allow for the prediction of the entire polymer MWD without information loss. In our work, we demonstrate a computer-controlled HTE platform that is able to run up to 8 unique variable conditions in parallel for the free radical polymerization of styrene. The segmented-flow HTE system was equipped with an inline Raman spectrometer and offline size exclusion chromatography (SEC) to obtain time-dependent conversion and MWD, respectively. Using ML forward models, we first predict monomer conversion, intrinsically learning varying polymerization kinetics that change for each experimental condition. In addition, we predict entire MWDs including the skew and shape as well as SHAP analysis to interpret the dependence on reagent concentrations and reaction time. We then used a transfer learning approach to use the data from our high-throughput flow reactor to predict batch polymerization MWDs with only three additional data points. Overall, we demonstrate that the combination of HTE and ML provides a high level of predictive accuracy in determining polymerization outcomes. Transfer learning can allow exploration outside existing parameter spaces efficiently, providing polymer chemists with the ability to target the synthesis of polymers with desired properties.
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Affiliation(s)
- Jin Da Tan
- Institute of Materials Research & Engineering, Agency for Science Technology and Research, 2 Fusionopolis Way, 138634 Singapore, Singapore
- National University of Singapore Graduate School - Integrative Sciences and Engineering Programme, 21 Lower Kent Ridge Road, Singapore 119077, Singapore
| | - Balamurugan Ramalingam
- Institute of Materials Research & Engineering, Agency for Science Technology and Research, 2 Fusionopolis Way, 138634 Singapore, Singapore
- Institute of Sustainability for Chemicals, Energy and Environment, Agency for Science Technology and Research, 8 Biomedical Grove, Singapore 138665, Singapore
| | - Swee Liang Wong
- Institute of Materials Research & Engineering, Agency for Science Technology and Research, 2 Fusionopolis Way, 138634 Singapore, Singapore
- Home Team Science and Technology Agency, Singapore 138507, Singapore
| | - Jayce Jian Wei Cheng
- Institute of Materials Research & Engineering, Agency for Science Technology and Research, 2 Fusionopolis Way, 138634 Singapore, Singapore
| | - Yee-Fun Lim
- Institute of Materials Research & Engineering, Agency for Science Technology and Research, 2 Fusionopolis Way, 138634 Singapore, Singapore
- Institute of Sustainability for Chemicals, Energy and Environment, Agency for Science Technology and Research, 8 Biomedical Grove, Singapore 138665, Singapore
| | - Vijila Chellappan
- Institute of Materials Research & Engineering, Agency for Science Technology and Research, 2 Fusionopolis Way, 138634 Singapore, Singapore
| | - Saif A Khan
- National University of Singapore Graduate School - Integrative Sciences and Engineering Programme, 21 Lower Kent Ridge Road, Singapore 119077, Singapore
- Department of Chemical and Biomolecular Engineering - National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Jatin Kumar
- Institute of Materials Research & Engineering, Agency for Science Technology and Research, 2 Fusionopolis Way, 138634 Singapore, Singapore
- Xinterra Pte. Ltd., 77 Robinson Road, Singapore 068896, Singapore
| | - Kedar Hippalgaonkar
- Institute of Materials Research & Engineering, Agency for Science Technology and Research, 2 Fusionopolis Way, 138634 Singapore, Singapore
- Department of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
- Institute of Functional Intelligent Materials - National University of Singapore, 4 Science Drive 2, Singapore 117544, Singapore
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Kınaytürk NK, Kalaycı T, Tunalı B, Altuğ DT. A spectroscopic approach to compare the quantum chemical calculations and experimental characteristics of some organic molecules; Benzene, Toluene, P-Xylene, P-Toluidine. Chem Phys 2023. [DOI: 10.1016/j.chemphys.2023.111905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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Absorption of pressurized methane in normal and supercooled p-xylene revealed via high-resolution neutron imaging. Sci Rep 2023; 13:136. [PMID: 36599907 DOI: 10.1038/s41598-022-27142-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 12/27/2022] [Indexed: 01/06/2023] Open
Abstract
Supercooling of liquids leads to peculiarities which are scarcely studied under high-pressure conditions. Here, we report the surface tension, solubility, diffusivity, and partial molar volume for normal and supercooled liquid solutions of methane with p-xylene. Liquid bodies of perdeuterated p-xylene (p-C8D10), and, for comparison, o-xylene (o-C8D10), were exposed to pressurized methane (CH4, up to 101 bar) at temperatures ranging 7.0-30.0 °C and observed at high spatial resolution (pixel size 20.3 μm) using a non-tactile neutron imaging method. Supercooling led to the increase of diffusivity and partial molar volume of methane. Solubility and surface tension were insensitive to supercooling, the latter substantially depended on methane pressure. Overall, neutron imaging enabled to reveal and quantify multiple phenomena occurring in supercooled liquid p-xylene solutions of methane under pressures relevant to the freeze-out in the production of liquefied natural gas.
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Enhancement of sp3 C Fraction in Diamond-like Carbon Coatings by Cryogenic Treatment. COATINGS 2021. [DOI: 10.3390/coatings12010042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Diamond-like carbon (DLC) coatings deposited onto high-speed-steel surfaces were subjected to deep cryogenic treatment (DCT) at temperatures of −120 to −196 °C to investigate the evolution of microstructure, bonding structure, and mechanical properties. The surface morphology and the bonding structure of the DLC coatings were studied using scanning electron microscopy, transmission electron microscopy, micro-Raman spectroscopy, and X-ray photoelectron spectroscopy. It is found that DCT affects the surface morphology, especially the size and the height of the aggregates. For those DLCs with more than 50% sp3 C fraction, the sp2 C → sp3 C transformation occurred in coatings treated at a temperature of −120 to −160 °C; and the maximum fraction of sp3 C was obtained after treatment at −140 °C. Almost keeping the wear resistance of DLCs, DCT can improve the adhesion strength, and surface hardness. The findings of this study indicate that DCT will be a potential post-treatment method to tune the microstructure and mechanical performance of DLC coatings.
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Sahoo S, Ravindran TR, Rajaraman R, Srihari V, Pandey KK, Chandra S. Pressure-Induced Amorphization of Diisopropylammonium Perchlorate Studied by Raman Spectroscopy and X-ray Diffraction. J Phys Chem A 2020; 124:1993-2000. [PMID: 32039598 DOI: 10.1021/acs.jpca.9b11325] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Diisopropylammonium salts have drawn attention in recent years due to their room-temperature ferroelectric properties. Triclinic diisopropylammonium perchlorate (DIPAP) exhibits ferroelectricity at room temperature. We have carried out density functional theory calculations to assign the phonon modes in DIPAP. High-pressure Raman spectra of DIPAP are recorded up to ∼3 GPa. Discontinuity in the NH2 bending and stretching mode frequencies and the appearance of new bands at 0.7 GPa suggest a phase transition by a rearrangement in the hydrogen network. Broadening of lattice modes at 1.3-1.7 GPa indicates a loss of crystalline nature above 1.7 GPa. High-pressure synchrotron X-ray diffraction of DIPAP shows an isostructural phase transition at 0.6 GPa and confirms amorphization at 1.5 GPa that may lead to a loss of ferroelectricity above this pressure. The ambient phase becomes reversible after releasing the pressure. The bulk modulus of DIPAP is determined to be 16.5 GPa.
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Affiliation(s)
- Shradhanjali Sahoo
- Materials Science Group, Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam 603102, Tamil Nadu, India
| | - T R Ravindran
- Materials Science Group, Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam 603102, Tamil Nadu, India
| | - R Rajaraman
- Materials Science Group, Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam 603102, Tamil Nadu, India
| | - V Srihari
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - K K Pandey
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Sharat Chandra
- Materials Science Group, Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam 603102, Tamil Nadu, India
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