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首页> 外文期刊>Crystal growth & design >Selective Thermal Elongation of Metal-Metal Distances in the Two-Dimensional Assembly of Ag(I) Ions Templated by Assembled Peptide Ligands
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Selective Thermal Elongation of Metal-Metal Distances in the Two-Dimensional Assembly of Ag(I) Ions Templated by Assembled Peptide Ligands

机译：以组装肽配体为模板的二维组装Ag（I）离子时金属距离的选择性热伸长

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摘要

To develop a tunable assembly of metal ions, we demonstrated a two-dimensional Ag(I) array in the crystalline state by using an assembly of dipeptide ligands as a template. The two-dimensional assembly of Ag(I) ions was obtained through the assembly of a Ag(I)-peptide polymer complex, which was held together by hydrogen bonding interactions. At -180 ℃, onedimensional zigzag chains of Ag(I) ions were formed in each layer, which further assembled to form two-dimensional layers. The arrangement of the Ag(I) ions included several Ag-Ag distances that are supported differently by the peptide assembly. Because of this difference, when heated from -180 to 50 ℃, the Ag(I) layer displays anisotropic thermal expansion in the arrangements, in which one of the Ag-Ag distances selectively elongated. This expansion is reversible, allowing switching between the zigzag chain assembly and the Ag(I) dimer assembly. Moreover, the resulting crystalline Ag(I) complexes show luminescence at both room temperature and at -196 ℃, suggesting the existence of Ag-Ag interactions.
机译：为了开发金属离子的可调谐组件，我们通过使用二肽配体组件作为模板演示了处于结晶状态的二维Ag（I）阵列。 Ag（I）离子的二维组装是通过Ag（I）-肽聚合物配合物的组装获得的，该配合物通过氢键相互作用保持在一起。在-180℃时，每一层中都形成了Ag（I）离子的一维锯齿形链，并进一步组装形成二维层。 Ag（I）离子的排列包括多个Ag-Ag距离，这些距离由肽装配体以不同方式支持。由于这种差异，当从-180加热到50℃时，Ag（I）层在排列中显示出各向异性的热膨胀，其中一个Ag-Ag距离有选择地延长。这种膨胀是可逆的，从而允许在锯齿形链组件和Ag（I）二聚体组件之间切换。此外，所得的结晶Ag（I）配合物在室温和-196℃均显示出发光，表明存在Ag-Ag相互作用。

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