Seeded growth of single-crystal two-dimensional covalent organic frameworks
Abstract
Covalent organic framework (COF) materials have been difficult to characterize structurally and to exploit because they tend to form powders or amorphous materials. Ma et al. studied a variety of three-dimensional COFs based on imine linkages (see the Perspective by Navarro). They found that the addition of aniline inhibited nucleation and allowed the growth of crystals large enough for single-crystal x-ray diffraction studies. Evans et al. describe a two-step process in which nanoscale seeds of boronate ester–linked two-dimensional COFs can be grown into micrometer-scale single crystals by using a solvent that suppresses the nucleation of additional nanoparticles. Transient absorption spectroscopy revealed superior charge transport in these crystallites compared with that observed in conventional powders.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 06, 2018
- Source ID
- 10.1126/science.aar7883
Entities
People
- Austin M Evans
- Edon Vitaku
- Lin Chen
- Lucas R Parent
- Matthew S Kirschner
- Nathan C Flanders
- Nathan C. Gianneschi
- Richard D. Schaller
- Ryan P Bisbey
- William Dichtel
Organizations
- Argonne National Laboratory
- Army Research Office
- Cornell University
- National Institutes of Health
- National Science Foundation
- Northwestern University
- United States Department of Energy