Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Site Tools

  • AAAS
  • Subscribe
  • Feedback

Site Search

Search Advanced

Science 18 November 2005:
Vol. 310. no. 5751, pp. 1166 - 1170
DOI: 10.1126/science.1120411
Prev | Table of Contents | Next

Reports

Porous, Crystalline, Covalent Organic Frameworks

Adrien P. Côté,1* Annabelle I. Benin,1 Nathan W. Ockwig,1 Michael O'Keeffe,2 Adam J. Matzger,1 Omar M. Yaghi1*

Covalent organic frameworks (COFs) have been designed and successfully synthesized by condensation reactions of phenyl diboronic acid {C6H4[B(OH)2]2} and hexahydroxytriphenylene [C18H6(OH)6]. Powder x-ray diffraction studies of the highly crystalline products (C3H2BO)6·(C9H12)1 (COF-1) and C9H4BO2 (COF-5) revealed expanded porous graphitic layers that are either staggered (COF-1, P63/mmc) or eclipsed (COF-5, P6/mmm). Their crystal structures are entirely held by strong bonds between B, C, and O atoms to form rigid porous architectures with pore sizes ranging from 7 to 27 angstroms. COF-1 and COF-5 exhibit high thermal stability (to temperatures up to 500° to 600°C), permanent porosity, and high surface areas (711 and 1590 square meters per gram, respectively).

1 Materials Design and Discovery Group, Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, MI 48109–1055, USA.
2 Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287–1604, USA.

* To whom correspondence should be addressed. E-mail: oyaghi{at}umich.edu (O.M.Y.); apcote{at}umich.edu (A.P.C.)

Read the Full Text


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Designed Synthesis of 3D Covalent Organic Frameworks.
H. M. El-Kaderi, J. R. Hunt, J. L. Mendoza-Cortes, A. P. Cote, R. E. Taylor, M. O'Keeffe, and O. M. Yaghi (2007)
Science 316, 268-272
   Abstract »    Full Text »    PDF »


To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)