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"Systematic design of pore size and
functionality in isoreticular MOFs and their application in methane
storage," by Mohamed Eddaoudi,
Jaheon Kim, Nathaniel Rosi, David Vodak, Joseph Wachter, Michael O'Keefe,
and Omar M. Yaghi, Science, 295(5554): 469-72, 18 January 2002.
[Authors' affiliations: University of
Michigan, Ann Arbor; Arizona State University, Tempe]
Abstract: "A strategy based on reticulating metal ions and organic
carboxylate links into extended networks has been advanced to a point that
allowed the design of porous structures in which pore size and functionality
could be varied systematically. Metal-organic framework (MOF-5), a prototype
of a new class of porous materials and one that is constructed from octahedral
Zn-O-C clusters and benzene links, was used to demonstrate that its
three-dimensional porous system can be functionalized with the organic groups
-Br, -NH2, -OC3H7, -OC5H11,-C2H4, and -C4H4 and that its pore size can be
expanded with the long molecular struts biphenyl, tetrahydropyrene, pyrene,
and terphenyl. We synthesized an isoreticular series (one that has the same
framework topology) of 16 highly crystalline materials whose open space
represented up to 91.1% of the crystal volume, as well as homogeneous periodic
pores that can be incrementally varied from 3.8 to 28.8 angstroms. One member
of this series exhibited a high capacity for methane storage (240 cubic
centimeters at standard temperature and pressure per gram at 36 atmospheres
and ambient temperature), and others the lowest densities (0.41 to 0.21 gram
per cubic centimeter) for a crystalline material at room temperature."
This 2002 report from Science was
cited 15 times in current journal articles indexed by Thomson
ISI during May-June 2003. Only two other chemistry papers published in the
last two years, aside from reviews, attracted more citations during that
two-month period. Prior to the most recent bimonthly count, citations to the
paper have accrued as follows:
March-April 2003: 16 citations
January-February 2003: 7
November-December 2002: 9
September-October 2002: 5
July-August 2002: 9
May-June 2002: 1
Total citations to date: 62
SOURCE: Hot
Papers Database (Included with a subscription to the ISI print newsletter Science
Watch®, available from the ISI
Research Services Group. Packaged on a CD-ROM that is mailed with each Science
Watch issue, the Hot
Papers Database contains data on hundreds of highly cited papers published
during the last two years. User interface permits searching by author,
organization, journal, field, and more. Total citations, as well as citations
accrued during successive bimonthly periods, can be assessed and graphed. An
updated CD containing the most recent bimonthly data is mailed with every new
issue of Science
Watch,
six times a year. The CD also includes an electronic version of the Science
Watch
issue in HTML format, for personal desktop access.)
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