title: Weaving of organic threads into a crystalline covalent organic framework.
abstract: 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.
authors.affiliation: Department of Chemistry, University of California, Berkeley, Materials Sciences Division, Lawrence Berkeley National Laboratory, and Kavli Energy NanoSciences Institute, Berkeley, CA 94720, USA.
authors.forename: Yuzhong
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden.
authors.forename: Yanhang
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Department of Chemistry, University of California, Berkeley, Materials Sciences Division, Lawrence Berkeley National Laboratory, and Kavli Energy NanoSciences Institute, Berkeley, CA 94720, USA.
authors.forename: Yingbo
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Department of Chemistry, University of California, Berkeley, Materials Sciences Division, Lawrence Berkeley National Laboratory, and Kavli Energy NanoSciences Institute, Berkeley, CA 94720, USA.
authors.forename: Xixi
authors.initials: X
authors.lastname: Sun
authors.affiliation: Department of New Architectures in Materials Chemistry, Materials Science Institute of Madrid, Consejo Superior de Investigaciones Científicas, Madrid 28049, Spain.
authors.forename: Felipe
authors.initials: F
authors.lastname: Gándara
authors.affiliation: Department of Chemistry, University of California, Berkeley, Materials Sciences Division, Lawrence Berkeley National Laboratory, and Kavli Energy NanoSciences Institute, Berkeley, CA 94720, USA.
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Furukawa
authors.affiliation: Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8565, Japan.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Liu
authors.affiliation: NSF Nanoscale Science and Engineering Center (NSEC), University of California at Berkeley, 3112 Etcheverry Hall, Berkeley, CA 94720, USA.
authors.forename: Hanyu
authors.initials: H
authors.lastname: Zhu
authors.affiliation: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors.forename: Chenhui
authors.initials: C
authors.lastname: Zhu
authors.affiliation: Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8565, Japan.
authors.forename: Kazutomo
authors.initials: K
authors.lastname: Suenaga
authors.affiliation: Department of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden.
authors.forename: Peter
authors.initials: P
authors.lastname: Oleynikov
authors.affiliation: King Abdulaziz City of Science and Technology, Post Office Box 6086, Riyadh 11442, Saudi Arabia.
authors.forename: Ahmad S
authors.initials: AS
authors.lastname: Alshammari
authors.affiliation: NSF Nanoscale Science and Engineering Center (NSEC), University of California at Berkeley, 3112 Etcheverry Hall, Berkeley, CA 94720, USA. Material Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA.
authors.forename: Xiang
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden. School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China. terasaki@mmk.su.se yaghi@berkeley.edu.
authors.forename: Osamu
authors.initials: O
authors.lastname: Terasaki
authors.affiliation: Department of Chemistry, University of California, Berkeley, Materials Sciences Division, Lawrence Berkeley National Laboratory, and Kavli Energy NanoSciences Institute, Berkeley, CA 94720, USA. King Abdulaziz City of Science and Technology, Post Office Box 6086, Riyadh 11442, Saudi Arabia. terasaki@mmk.su.se yaghi@berkeley.edu.
authors.forename: Omar M
authors.initials: OM
authors.lastname: Yaghi