Weaving of organic threads into a crystalline covalent organic framework
Weaving of organic threads into a crystalline covalent organic framework
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DOI：
10.1126/science.aad4011
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发表时间：
2016-01-22
期刊：
影响因子：
56.9
通讯作者：
Yaghi, Omar M.
中科院分区：
文献类型：
--
作者：
Liu, Yuzhong;Ma, Yanhang;Yaghi, Omar M.
通过醛官能化的四氟硼酸二邻菲罗啉合铜（I）、Cu（PDB）（2）（BF 4）和联苯胺（BZ）的亚胺缩合反应，合成了一种由螺旋状有机丝构成的三维共价有机骨架（COF-505）。铜中心在拓扑学上独立于COF结构内的编织，并用作将线带入编织图案而不是更常见的平行排列的模板。铜（I）离子可以可逆地去除和添加，而不会损失COF结构，其弹性增加十倍伴随其脱金属。COF-505中的线具有许多自由度，在整个材料中，它们之间可以发生巨大的偏差，而不会破坏整体结构的编织。
A three-dimensional covalent organic framework (COF-505) constructed from helical organic threads, designed to be mutually weaving at regular intervals, has been synthesized by imine condensation reactions of aldehyde functionalized copper(I)-bisphenanthroline tetrafluoroborate, Cu(PDB)(2)(BF4), and benzidine (BZ). The copper centers are topologically independent of the weaving within the COF structure and serve as templates for bringing the threads into a woven pattern rather than the more commonly observed parallel arrangement. The copper(I) ions can be reversibly removed and added without loss of the COF structure, for which a tenfold increase in elasticity accompanies its demetalation. The threads in COF-505 have many degrees of freedom for enormous deviations to take place between them, throughout the material, without undoing the weaving of the overall structure.