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A Series of Homochiral Helical Metal-Organic Frameworks Based on Proline Derivatives

机译:基于脯氨酸衍生物的一系列手性螺旋金属有机骨架

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摘要

Eight novel three-dimensional homochiral helical metal-organic frameworks (HHMOFs), namely, [Cd-3(SS)-PIA)(2)-(PPA)(H2O)(2)](n) (1-L), [Cd-3((R)-PIA)(2)(PPA)(H2O)(2)](n) (1-D), [Cd-4((R)-PIA)(3)(DPP)(4)(H2O)(4)](n) (2-D), [Cd-1.5((R)-PIA)-(DPEE)(1.5)](n) (4-D), [Cd-1.5((S)-PIA)(DPEA)(1.5)](n) (5-L), and [Cd-1.5((S)-PIA)(DPEA)(1.5)](n) (5-D) (H(3)PIA = 5-(2-carboxypyrrolidine-1-carbonyl) isophthalic acid) have been synthesized using, proline-derived ligands ((S)-H(3)PIA and (R)-H(3)PIA). Crystallographic analysis indicates that all the complexes contain homochiral left- and/or right-handed helical chains, which are constructed by PIA fragments and Cd(II) ions. Meanwhile, in these complexes nitrogen heterocycle auxiliary ligands play an important role in structural diversity. Some physical characteristics, such as thermal stabilities, solid-state circular dichroism, and photoluminescent properties, are also investigated. Our results highlight an effective method to apply proline ligands to construct interesting HHMOFs.
机译:八个新颖的三维同手性螺旋金属有机骨架(HHMOF),即[Cd-3(SS)-PIA)(2)-(PPA)(H2O)(2)](n)(1-L), [Cd-3((R)-PIA)(2)(PPA)(H2O)(2)](n)(1-D),[Cd-4((R)-PIA)(3)(DPP) (4)(H2O)(4)](n)(2-D),[Cd-1.5((R)-PIA)-(DPEE)(1.5)](n)(4-D),[Cd- 1.5((S)-PIA)(DPEA)(1.5)](n)(5-L)和[Cd-1.5((S)-PIA)(DPEA)(1.5)](n)(5-D )(H(3)PIA = 5-(2-羧基吡咯烷-1-羰基)间苯二甲酸)已使用脯氨酸衍生的配体((S)-H(3)PIA和(R)-H(3)合成PIA)。晶体学分析表明,所有配合物均含有由PIA片段和Cd(II)离子构成的同手性左旋和/或右旋螺旋链。同时,在这些配合物中,氮杂环辅助配体在结构多样性中起重要作用。还研究了一些物理特性,例如热稳定性,固态圆二色性和光致发光特性。我们的结果突出了应用脯氨酸配体构建有趣的HHMOF的有效方法。

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