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首页> 外文期刊>Advanced Functional Materials >Chemically Resistant, Shapeable, and Conducting Metal-Organic Gels and Aerogels Built from Dithiooxamidato Ligand
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Chemically Resistant, Shapeable, and Conducting Metal-Organic Gels and Aerogels Built from Dithiooxamidato Ligand

机译：由二硫代草酰胺配体制成的耐化学腐蚀，可塑形和导电的金属有机凝胶和气凝胶

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摘要

Metal-organic gels (MOGs) appear as a blooming alternative to well-known metal-organic frameworks (MOFs). Porosity of MOGs has a microstructural origin and not strictly crystalline like in MOFs; therefore, gelation may provide porosity to any metal-organic system, including those with interesting properties but without a porous crystalline structure. The easy and straightforward shaping of MOGs contrasts with the need of binders for MOFs. In this contribution, a series of MOGs based on the assembly of 1D-coordination polymer nanofibers of formula [M(DTA)] n (M-II: Ni, Cu, Pd; DTA: dithiooxamidato) are reported, in which properties such as porosity, chemical inertness, mechanical robustness, and stimuli-responsive electrical conductivity are brought together. The strength of the M. S bond confers an unusual chemical resistance, withstanding exposure to acids, alkalis, and mild oxidizing/reducing chemicals. Supercritical drying of MOGs provides ultralight metal-organic aerogels (MOAs) with densities as low as 0.03 g cm(-3) and plastic/brittle behavior depending on the nanofiber aspect ratio. Conductivity measurements reveal a semiconducting behavior (10(-12) to 10(-7) S cm(-1) at 298 K) that can be improved by doping (10(-5) S cm(-1)). Moreover, it must be stressed that conductivity of MOAs reversibly increases (up to 10(-5) S cm(-1)) under the presence of acetic acid.
机译：金属有机凝胶（MOG）似乎是众所周知的金属有机骨架（MOF）的替代品。 MOG的孔隙率具有微观结构，并且不像MOF那样严格结晶。因此，胶凝作用可以为任何金属有机体系提供孔隙，包括那些具有令人感兴趣的特性但没有多孔晶体结构的有机体系。 MOG的简单直接成型与MOF的粘合剂需求形成对比。在该贡献中，报道了一系列基于式[M（DTA）] n（M-II：Ni，Cu，Pd; DTA：dithiooxamidato）的一维配位聚合物纳米纤维组装而成的MOG，其中具有孔隙率，化学惰性，机械强度和刺激响应的电导率综合在一起。 M. S键的强度赋予其非凡的耐化学性，即使暴露于酸，碱和温和的氧化/还原性化学物质也能抵抗。 MOG的超临界干燥可提供超轻的金属有机气凝胶（MOA），其密度可低至0.03 g cm（-3），并且具有塑料/脆性，具体取决于纳米纤维的长宽比。电导率测量揭示了一种半导体行为（在298 K时为10（-12）至10（-7）S cm（-1）），可以通过掺杂（10（-5）S cm（-1））来改善。此外，必须强调的是，在乙酸的存在下，MOA的电导率可逆地增加（高达10（-5）S cm（-1））。

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  • 来源
    《Advanced Functional Materials》 |2017年第15期|1605448.1-1605448.11|共11页
  • 作者

    Vallejo-Sanchez Daniel; Amo-Ochoa Pilar; Beobide Garikoitz; Castillo Oscar; Froeba Michael; Hoffmann Frank; Luque Antonio; Ocon Pilar; Perez-Yanez Sonia;

  • 作者单位

    Univ Basque Country, Dept Quim Inorgan, Fac Ciencias & Tecnol, UPV EHU, Apartado 644, E-48080 Bilbao, Spain;

    Univ Autonoma Madrid, Dept Quim Inorgan & Quim Fis, E-28049 Madrid, Spain;

    Univ Basque Country, Dept Quim Inorgan, Fac Ciencias & Tecnol, UPV EHU, Apartado 644, E-48080 Bilbao, Spain;

    Univ Basque Country, Dept Quim Inorgan, Fac Ciencias & Tecnol, UPV EHU, Apartado 644, E-48080 Bilbao, Spain;

    Univ Hamburg, Inst Inorgan & Appl Chem, Martin Luther King Pl 6, D-20146 Hamburg, Germany;

    Univ Hamburg, Inst Inorgan & Appl Chem, Martin Luther King Pl 6, D-20146 Hamburg, Germany;

    Univ Basque Country, Dept Quim Inorgan, Fac Ciencias & Tecnol, UPV EHU, Apartado 644, E-48080 Bilbao, Spain;

    Univ Autonoma Madrid, Dept Quim Inorgan & Quim Fis, E-28049 Madrid, Spain;

    Univ Basque Country, Dept Quim Inorgan, Fac Ciencias & Tecnol, UPV EHU, Apartado 644, E-48080 Bilbao, Spain;

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