Powder Diffraction

Technical Articles

Synchrotron X-ray studies of metal-organic framework M 2(2,5-dihydroxyterephthalate), M = (Mn, Co, Ni, Zn) (MOF74)

W. Wong-Nga1 c1, J. A. Kaduka2, H. Wua1 and M. Suchomela3

a1 National Institute of Standards and Technology, Gaithersburg, Maryland 20899

a2 Illinois Institute of Technology, Chicago, Illinois 60616

a3 Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439-4856

Abstract

M 2(dhtp)·nH2O (M = Mn, Co, Ni, Zn; dhtp = 2,5-dihydroxyterephthalate), known as MOF74, is a family of excellent sorbent materials for CO2 that contains coordinatively unsaturated metal sites and a honeycomb-like structure featuring a broad one-dimensional channel. This paper describes the structural feature and provides reference X-ray powder diffraction patterns of these four isostructural compounds. The structures were determined using synchrotron diffraction data obtained at beam line 11-BM at the Advanced Photon Source (APS) in the Argonne National Laboratory. The samples were confirmed to be hexagonal R 3 (No. 148). From M = Mn, Co, Ni, to Zn, the lattice parameter a of MOF74 ranges from 26.131 73(4) Å to 26.5738(2) Å, c from 6.651 97(5) to 6.808 83(8) Å, and V ranges from 3948.08 Å3 to 4163.99 Å3, respectively. The four reference X-ray powder diffraction patterns have been submitted for inclusion in the Powder Diffraction File (PDF).

(Received July 06 2012)

(Accepted October 02 2012)

Key words

  • Metal-organic framework;
  • MOF74;
  • M2(2,5-dihydroxyterephthalate)·nH2O;
  • (M = Mn, Co, Ni, Zn);
  • Synchrotron X-ray;
  • High resolution diffraction patterns

Correspondence:

c1 Author to whom correspondence should be addressed. Electronic mail: winnie.wong-ng@nist.gov