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Title: Solvent-free mechanochemical synthesis and magnetic properties of rare-earth based metal-organic frameworks

Mechanical milling of benzene 1,3,5-tricarboxylic acid [C 6H 3(COOH) 3], both with the single and mixed rare earth carbonates [R 2(CO 3) 3·xH 2O; R = Gd, Tb and Dy], leads to the formation of metal-organic frameworks [R{C 6H 3(COO) 3}] that adopt MIL-78 type structure. M(T) data of the investigated MOFs do not show any apparent onset of long range magnetic ordering down to 2 K. The M(H) data for Gd{C 6H 3(COO) 3}collected at 2 K show deviations from the magnetization behavior expected for non-interacting Gd 3+ ions. For the Gd based MOF the temperature dependence of the isothermal magnetic entropy change (i.e. magnetocaloric effect, ΔS M) exhibits a monotonous increase with decreasing temperature and at T = 3.5 K it reaches 34.1 J kg $-$1K $-$1 for a field change (ΔH) of 50 kOe. Finally, for the same ΔH the maximum values of ΔS M for R = Tb and Dy are 5.5 J kg $-$1K $-$1 and 8.5 J kg $-$1K $-$1 at 9.5 K and 4.5 K, respectively.
Authors:
 [1] ;  [2] ;  [2] ;  [1] ;  [3]
  1. Sigma Aldrich Corp., Milwaukee, WI (United States)
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  3. (United States)
Publication Date:
Report Number(s):
IS-J-9207
Journal ID: ISSN 0925-8388; PII: S0925838816337008
Grant/Contract Number:
AC02-07CH11358
Type:
Accepted Manuscript
Journal Name:
Journal of Alloys and Compounds
Additional Journal Information:
Journal Volume: 696; Journal Issue: C; Journal ID: ISSN 0925-8388
Publisher:
Elsevier
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
OSTI Identifier:
1347896
Alternate Identifier(s):
OSTI ID: 1413043

Singh, N. K., Gupta, S., Pecharsky, V. K., Balema, V. P., and Ames Lab. and Iowa State Univ., Ames, IA. Solvent-free mechanochemical synthesis and magnetic properties of rare-earth based metal-organic frameworks. United States: N. p., Web. doi:10.1016/j.jallcom.2016.11.220.
Singh, N. K., Gupta, S., Pecharsky, V. K., Balema, V. P., & Ames Lab. and Iowa State Univ., Ames, IA. Solvent-free mechanochemical synthesis and magnetic properties of rare-earth based metal-organic frameworks. United States. doi:10.1016/j.jallcom.2016.11.220.
Singh, N. K., Gupta, S., Pecharsky, V. K., Balema, V. P., and Ames Lab. and Iowa State Univ., Ames, IA. 2016. "Solvent-free mechanochemical synthesis and magnetic properties of rare-earth based metal-organic frameworks". United States. doi:10.1016/j.jallcom.2016.11.220. https://www.osti.gov/servlets/purl/1347896.
@article{osti_1347896,
title = {Solvent-free mechanochemical synthesis and magnetic properties of rare-earth based metal-organic frameworks},
author = {Singh, N. K. and Gupta, S. and Pecharsky, V. K. and Balema, V. P. and Ames Lab. and Iowa State Univ., Ames, IA},
abstractNote = {Mechanical milling of benzene 1,3,5-tricarboxylic acid [C6H3(COOH)3], both with the single and mixed rare earth carbonates [R2(CO3)3·xH2O; R = Gd, Tb and Dy], leads to the formation of metal-organic frameworks [R{C6H3(COO)3}] that adopt MIL-78 type structure. M(T) data of the investigated MOFs do not show any apparent onset of long range magnetic ordering down to 2 K. The M(H) data for Gd{C6H3(COO)3}collected at 2 K show deviations from the magnetization behavior expected for non-interacting Gd3+ ions. For the Gd based MOF the temperature dependence of the isothermal magnetic entropy change (i.e. magnetocaloric effect, ΔSM) exhibits a monotonous increase with decreasing temperature and at T = 3.5 K it reaches 34.1 J kg$-$1K$-$1 for a field change (ΔH) of 50 kOe. Finally, for the same ΔH the maximum values of ΔSM for R = Tb and Dy are 5.5 J kg$-$1K$-$1 and 8.5 J kg$-$1K$-$1 at 9.5 K and 4.5 K, respectively.},
doi = {10.1016/j.jallcom.2016.11.220},
journal = {Journal of Alloys and Compounds},
number = C,
volume = 696,
place = {United States},
year = {2016},
month = {11}
}

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