Frank Sailer, Hipassia M. Moura, Taniya Purkait, Lars Vogelsang, Markus Sauer, Annette Foelske, Rainer F. Winter, Alexandre Ponrouch, Miriam M. Unterlass
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Herein, we circumvent this issue by employing solvothermal synthesis in superheated isopropanol, which through temperature tunability of the solvent properties allows for both generating and linking both components in one-pot. First, it is shown that an organic benzimidazole-based pigment molecule designed for readily binding to Ti can be synthesized solvothermally. Second, new class II titanium-based HMs are generated from Ti(O<sup><i>i</i></sup>Pr)<sub>4</sub> and pigment precursors in a solvothermal reaction. The pigment@TiO<sub>2</sub> HMs feature significant porosity and are structurally identified as layered structures of lepidocrocite-like TiO<sub>2</sub> linked via pigment molecules. These layered HMs assemble into hierarchical nanoflowers, and depending on the pigment segments, different interlayer spacings in between inorganic layers are observed. 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引用次数: 0
摘要
混合材料(HMs)结合了有机化合物的高功能多样性和无机材料的典型特性,如高机械强度或高热稳定性。本文报告了有机颜料分子与作为无机成分的二氧化钛(TiO2)共价结合的混合材料,即所谓的第二类混合材料。由于极性有机颜料成分和无机极性二氧化钛成分的形成需要不同的条件,因此合成此类 HMs 本身就具有挑战性。在本文中,我们通过在过热异丙醇中采用溶解热合成法来规避这一问题,该方法通过对溶剂特性的温度调节,可在一锅内同时生成和连接两种成分。首先,我们证明了一种基于苯并咪唑的有机颜料分子可以通过溶解热合成的方式与钛结合。其次,在溶热反应中由 Ti(OiPr)4 和颜料前体生成新的第二类钛基 HM。颜料@TiO2 HMs 具有显著的多孔性,在结构上被确定为通过颜料分子连接的鳞片状二氧化钛的层状结构。这些分层的 HMs 组装成分层的纳米花束,根据颜料段的不同,无机层之间的层间距也不同。第三,颜料@TiO2 材料可用作锂离子电池的电极材料。
Covalently Linked Pigment@TiO2 Hybrid Materials by One-Pot Solvothermal Synthesis
Hybrid materials (HMs) combine the high diversity of functionalities of organic compounds with properties typical for inorganic materials, such as high mechanical strength or high thermal stability. Herein, HMs combining organic pigment molecules and TiO2 as inorganic component, with covalently linked components, i.e., so-called class II HMs, are reported. The synthesis of such HMs is intrinsically challenging, as the apolar organic pigment component and the inorganic polar TiO2 component require different conditions for their respective formation. Herein, we circumvent this issue by employing solvothermal synthesis in superheated isopropanol, which through temperature tunability of the solvent properties allows for both generating and linking both components in one-pot. First, it is shown that an organic benzimidazole-based pigment molecule designed for readily binding to Ti can be synthesized solvothermally. Second, new class II titanium-based HMs are generated from Ti(OiPr)4 and pigment precursors in a solvothermal reaction. The pigment@TiO2 HMs feature significant porosity and are structurally identified as layered structures of lepidocrocite-like TiO2 linked via pigment molecules. These layered HMs assemble into hierarchical nanoflowers, and depending on the pigment segments, different interlayer spacings in between inorganic layers are observed. Third, the pigment@TiO2 materials are shown to be usable as electrode materials in lithium-ion batteries.