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  1. Article: Stability of Zr-Based UiO-66 Metal-Organic Frameworks in Basic Solutions.

    Kim, Jun Yeong / Kang, Jiwon / Cha, Seungheon / Kim, Haein / Kim, Dopil / Kang, Houng / Choi, Isaac / Kim, Min

    Nanomaterials (Basel, Switzerland)

    2024  Volume 14, Issue 1

    Abstract: Although Zr-based metal-organic frameworks (MOFs) exhibit robust chemical and physical stability in the presence of moisture and acidic conditions, their susceptibility to nucleophilic attacks from bases poses a critical challenge to their overall ... ...

    Abstract Although Zr-based metal-organic frameworks (MOFs) exhibit robust chemical and physical stability in the presence of moisture and acidic conditions, their susceptibility to nucleophilic attacks from bases poses a critical challenge to their overall stability. Herein, we systematically investigate the stability of Zr-based UiO-66 (UiO = University of Oslo) MOFs in basic solutions. The impact of 11 standard bases, including inorganic salts and organic bases, on the stability of these MOFs is examined. The destruction of the framework is confirmed through powder X-ray diffraction (PXRD) patterns, and the monitored dissolution of ligands from the framework is assessed using nuclear magnetic resonance (NMR) spectroscopy. Our key findings reveal a direct correlation between the strength and concentration of the base and the destruction of the MOFs. The summarized data provide valuable insights that can guide the practical application of Zr-based UiO-66 MOFs under basic conditions, offering essential information for their optimal utilization in various settings.
    Language English
    Publishing date 2024-01-02
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662255-5
    ISSN 2079-4991
    ISSN 2079-4991
    DOI 10.3390/nano14010110
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Porous silicon surface modification via a microwave-induced in situ cyclic disulfide (S-S) cleavage and Si-S bond formation.

    Oh, Ji Hyeon / Um, Hyeji / Park, Yoon Kyung / Kim, Min / Kim, Dopil / Bang, Eun-Kyoung / Kang, Rae Hyung / Kim, Dokyoung

    Colloids and surfaces. B, Biointerfaces

    2022  Volume 222, Page(s) 113055

    Abstract: Porous silicon (pSi) materials have gained a great deal of attention from various research fields, and their surface-functionalization is one of the critical points for their applications. In this study, a new surface modification method of Si-H- ... ...

    Abstract Porous silicon (pSi) materials have gained a great deal of attention from various research fields, and their surface-functionalization is one of the critical points for their applications. In this study, a new surface modification method of Si-H-terminated pSi materials via microwave-induced Si-S bond formation is disclosed. The silicon hydride (Si-H) functionality on the pSi surface could react with the 5-membered cyclic disulfide (S-S) compound (DL-α-lipoic acid in this study) by microwave-induced in situ S-S bond cleavage and Si-S bond formation. This surface chemistry is fast responsive (<10 min) and more efficient than other methods such as vortexing, heating stirring, or ultrasonication. The reaction maintains the primary porous structure of pSi materials including pSi wafer, pSi rugate filer, and pSi nanoparticles. An additional functional group such as carboxylic acid is demonstrated to be readily introducible on the pSi surface for further applications. Overall, this study has successfully demonstrated the porous silicon surface modification via a microwave-induced in situ cyclic disulfide (S-S) cleavage and Si-S bond formation.
    MeSH term(s) Silicon/chemistry ; Porosity ; Microwaves ; Carboxylic Acids
    Chemical Substances Silicon (Z4152N8IUI) ; Carboxylic Acids
    Language English
    Publishing date 2022-11-26
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1500523-9
    ISSN 1873-4367 ; 0927-7765
    ISSN (online) 1873-4367
    ISSN 0927-7765
    DOI 10.1016/j.colsurfb.2022.113055
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Effect of the Metal within Regioisomeric Paddle-Wheel-Type Metal-Organic Frameworks.

    Ha, Hyeonbin / Kim, Youngik / Kim, Dopil / Lee, Jihyun / Song, Yoodae / Kim, Suyeon / Park, Myung Hwan / Kim, Youngjo / Kim, Hyungjun / Yoon, Minyoung / Kim, Min

    Chemistry (Weinheim an der Bergstrasse, Germany)

    2019  Volume 25, Issue 63, Page(s) 14414–14420

    Abstract: The effect of metal on the degree of flexibility upon evacuation of metal-organic frameworks (MOFs) has been revealed with positional control of the organic functionalities. Although Co-, Cu-, and Zn-based DMOFs (DMOF = DABCO MOF, DABCO = 1,4- ... ...

    Abstract The effect of metal on the degree of flexibility upon evacuation of metal-organic frameworks (MOFs) has been revealed with positional control of the organic functionalities. Although Co-, Cu-, and Zn-based DMOFs (DMOF = DABCO MOF, DABCO = 1,4-diazabicyclo[2.2.2]octane) with ortho-ligands (2,3-NH
    Language English
    Publishing date 2019-10-15
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1478547-X
    ISSN 1521-3765 ; 0947-6539
    ISSN (online) 1521-3765
    ISSN 0947-6539
    DOI 10.1002/chem.201903210
    Database MEDical Literature Analysis and Retrieval System OnLINE

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