A Distorted pcu Topological Heterometallic Metal-Organic Framework with Right- and Left Chiral Covalent Layers

作者：Wen Gui Lin; Han Min Le^*; Wang Feng Wu; Zhao Xing; Yin Cheng Yang

来源：Zeitschrift fur Anorganische und Allgemeine Chemie, 2013, 639(12-13): 2307-2311.

DOI：10.1002/zaac.201300230

• Heterometallic metal-organic frameworks
• Zinc
• 5-Methylisophthalic acid
• Chiral layers
• Distorted pcu topology

An unusual heterometallic 3D framework, [Zn2Ca(mip)(2)(Hmip)(2)(bpe)](n) (1), was synthesized by using an alkali-earth metal (calcium) and a d(10) metal (zinc) under hydrothermal conditions [H(2)mip = 5-methylisophthalic acid, bpe = 1,2-bi(4-pyridyl)ethene]. Single-crystal X-ray analysis shows that complex 1 is a pillared-grid metal-organic framework (MOF) with nanosized parallelogram channels fully occupied by dangling Hmip(-) pendants. The most fascinating structural feature of the complex is that the achiral framework pillared by rod-like bpe is assembled by opposite chiral covalent sheets arranged alternatingly with single left- or right-handed helical chains. Topologically, the framework can be simplified as a distorted uninodal pcu net with the Schlafli symbol of {4(12)6(3)}, which is rare representative of an achiral pillared-layer MOF with chiral sheets comprising only one type of helical chains.

• 出版日期2013-10
• 单位洛阳师范学院; 淮南师范学院