Homochiral laminar europium metal-organic framework with unprecedented giant dielectric anisotropy

Zhi Rong Qu, Qiong Ye, Hong Zhao, Da Wei Fu, Heng Yun Ye, Ren Gen Xiong, Tomoyuki Akutagawa, Takayoshi Nakamura

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Hydrothermal (deuteratothermal) reaction of L-ethyl lactate (Lig-Et) with Eu(ClO4)3·6 H2O gives colorless block crystals of [Eu(Lig)2-(X2O)2][ClO4] (1, X = H; 2, X = D) both of which possess a two-dimensional laminar homochiral framework. Single-crystal dielectric measurements reveal that 1 and 2 display a giant dielectric anisotropy approximately exceeding 100 and large isotopic effect with about 54% enhancement along the a axis. Their ferroelectric features further confirm this respect. Crystal parameters: 1, C6H 14ClO12Eu, Mr = 465.58, monoclinic, C 2, a=8.6786(6), b=8.3965(6), c = 10.2153(7) Å, β= 92.040(1)°, V=743.92(9) Å3, Z = 2, ρcalcd = 2.079 Mg m-3, R1 =0.0508, wR2 = 0.1239, μ= 4.448 mm-1, S = 1.043; Flack = 0.04(5), 2: C6H 10D4ClO12Eu, Mr = 469.61, monoclinic, C2, a = 8.689(2), b =8.410(2), c = 10.224(3) Å, β = 92.057(4)°, V = 746.7(3) Å3, Z = 2, ρcalcd = 2.089 Mg m-3, R1 = 0.0465, wR 2 = 0.1150, μ = 4.432 mm-1, S = 1.058; Flack = 0.02(5).

Original languageEnglish
Pages (from-to)3452-3456
Number of pages5
JournalChemistry - A European Journal
Volume14
Issue number11
DOIs
Publication statusPublished - 2008 Apr 7
Externally publishedYes

Keywords

  • Dielectric anisotropy
  • Europium
  • Organic-inorganic hybrid composites
  • Structure elucidation

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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