Five metal-organic frameworks based on isomeric chloro-functionalized azobenzenedicarboxylic acids


POLYHEDRON, cilt.154, ss.465-472, 2018 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 154
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1016/j.poly.2018.08.018
  • Dergi Adı: POLYHEDRON
  • Sayfa Sayıları: ss.465-472


Chloro-functionalized azobenzenedicarboxylic acids were prepared and their 2D and 3D metal-organic frameworks (MOFs), namely {[Co(4,4'-Cl(2)abdc)(DMA)]center dot H2O}(n) (1), {[Cu(4,4'-Cl(2)abdc)(DMA)]center dot G}(n), (2), {[Zn(4,4'-Cl(2)abdc)(DMSO)center dot H2O}(n) (3), {[Mn(3,3'-Cl(2)abdc)(DMA)]center dot 0.5DMA)](n) (4) and ([Cu(3,3'-Cl(2)abdc)(DMA)]center dot 0.5DMA)(n) (5), (4,4'-H(2)Cl(2)abdc: 3,3'-dichloro-4,4'-azobenzenedicarboxylic acid, 3,3'-H(2)Cl(2)abdc: 4,4'-dichloro-3,3'-azobenzenedicarboxylic acid), were systematically synthesized to investigate the positional isomer effect on the structures and characterized by elemental analysis, IR spectroscopy and single crystal X-ray diffraction. The X-ray results demonstrate that 1 and 3 possess a 2-fold interpenetrated 3D + 3D -> 3D framework with the seh-4,6-Imma topology, while 2, 4 and 5 display 2D layers. In 1 and 3, infinite [M2O(COO)(2)] rod units occur, whilst well-known binuclear [M-2(COO)(4)] units are observed in the other compounds. Compounds 4 and 5 display a lower dimension due to the cis-position of the carboxylate groups of 3,3'-Cl(2)abdc as compared to compounds 1-3, prepared with 4,4'-Cl(2)abdc. Moreover, the thermal, photoluminescence and optical properties of the compounds were also examined. (C) 2018 Elsevier Ltd. All rights reserved.