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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 23 times in current journal articles indexed by Thomson
ISI during November-December 2003. This latest two-month tally maintains the
paper's status as the second-most-cited paper in chemistry (excluding reviews)
published in the last two years. Prior to the most recent bimonthly count,
citations to the paper have accrued as follows:
September-October 2003: 21 citations
July-August 2003: 17
May-June 2003: 15
March-April 2003: 16
January-February 2003: 7
November-December 2002: 9
September-October 2002: 5
July-August 2002: 9
May-June 2002: 1
Total citations to date: 123
Related
information:
View the top 10
scientists in Chemistry; for the period of January 1, 1993 -
December 31, 2003
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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