skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Sol-gel synthesis of KV{sup II}[Cr{sup III}(CN){sub 6}]{center_dot}2H{sub 2}O: A crystalline molecule-based magnet with a magnetic ordering temperature above 100 C

Abstract

Recently, there has been much interest in the synthesis of molecule-based magnets, which are magnets whose solid-state structures consist of arrays of molecular units. Such solids do not at present have real-world uses, in part because none of them possesses a key characteristic: for most commercial applications, a magnet must retain its magnetism well above room temperature. Of the four molecule-based magnets that remain magnetic at room temperature, one decomposes at 350 K, and three demagnetize near 315 K. All four of these solids are amorphous, and their solid state structures are unknown, although the latter three probably adopt a structure like that of the pigment Prussian blue. The authors now describe the use of sol-gel methods to synthesize several crystalline molecule-based magnets with the Prussian blue structure. The gelation process appears to be important to the growth of the crystalline phase. Most notable among the current results is the discovery of a molecule-based magnet, KV{sup II}[Cr{sup III}(CN){sub 6}]{center_dot}2H{sub 2}O, with the unprecedented magnetic ordering temperature of 376 K (103 C).

Authors:
;  [1]
  1. Univ. of Illinois, Urbana, IL (United States)
Publication Date:
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
684328
DOE Contract Number:  
FG02-91ER45439
Resource Type:
Journal Article
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Volume: 121; Journal Issue: 23; Other Information: PBD: 16 Jun 1999
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; SOL-GEL PROCESS; SYNTHESIS; CYANIDES; POTASSIUM; VANADIUM; MAGNETS; MOLECULES

Citation Formats

Holmes, S.M., and Girolami, G.S. Sol-gel synthesis of KV{sup II}[Cr{sup III}(CN){sub 6}]{center_dot}2H{sub 2}O: A crystalline molecule-based magnet with a magnetic ordering temperature above 100 C. United States: N. p., 1999. Web. doi:10.1021/ja990946c.
Holmes, S.M., & Girolami, G.S. Sol-gel synthesis of KV{sup II}[Cr{sup III}(CN){sub 6}]{center_dot}2H{sub 2}O: A crystalline molecule-based magnet with a magnetic ordering temperature above 100 C. United States. doi:10.1021/ja990946c.
Holmes, S.M., and Girolami, G.S. Wed . "Sol-gel synthesis of KV{sup II}[Cr{sup III}(CN){sub 6}]{center_dot}2H{sub 2}O: A crystalline molecule-based magnet with a magnetic ordering temperature above 100 C". United States. doi:10.1021/ja990946c.
@article{osti_684328,
title = {Sol-gel synthesis of KV{sup II}[Cr{sup III}(CN){sub 6}]{center_dot}2H{sub 2}O: A crystalline molecule-based magnet with a magnetic ordering temperature above 100 C},
author = {Holmes, S.M. and Girolami, G.S.},
abstractNote = {Recently, there has been much interest in the synthesis of molecule-based magnets, which are magnets whose solid-state structures consist of arrays of molecular units. Such solids do not at present have real-world uses, in part because none of them possesses a key characteristic: for most commercial applications, a magnet must retain its magnetism well above room temperature. Of the four molecule-based magnets that remain magnetic at room temperature, one decomposes at 350 K, and three demagnetize near 315 K. All four of these solids are amorphous, and their solid state structures are unknown, although the latter three probably adopt a structure like that of the pigment Prussian blue. The authors now describe the use of sol-gel methods to synthesize several crystalline molecule-based magnets with the Prussian blue structure. The gelation process appears to be important to the growth of the crystalline phase. Most notable among the current results is the discovery of a molecule-based magnet, KV{sup II}[Cr{sup III}(CN){sub 6}]{center_dot}2H{sub 2}O, with the unprecedented magnetic ordering temperature of 376 K (103 C).},
doi = {10.1021/ja990946c},
journal = {Journal of the American Chemical Society},
number = 23,
volume = 121,
place = {United States},
year = {1999},
month = {6}
}