Effect of Solvent Molecule in Pore for Flexible Porous Coordination Polymer upon Gas Adsorption and Iodine Encapsulation

ARICI M., YEŞİLEL O. Z., TAŞ M., Demiral H.

INORGANIC CHEMISTRY, vol.54, no.23, pp.11283-11291, 2015 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 54 Issue: 23
  • Publication Date: 2015
  • Doi Number: 10.1021/acs.inorgchem.5b01869
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.11283-11291
  • Eskisehir Osmangazi University Affiliated: Yes


Four new Zn(II)-coordination polymers, namely, [Zn-2(mu(6)-ao(2)btc)(mu-obix)(2)](n), (1), [Zn-2(mu(4)-ao(2)btc)(mu-obix)(2)](n) (2), [Zn-2(mu(4)-ao(2)btc)(mu-mbix)(2)](n) (3), and {[Zn-2(mu(4)-ao(2)btc)(mu-pbix)(2)]center dot 2DMF center dot 8H(2)O}(n) (4), where ao(2)btc = dioxygenated form of 3,3',5,5'-azobenzenetetracarboxylate and obix, mbix, and pbix = 1,2-, 1,3-, and 1,4-bis(imidazol-1-ylmethyl)benzene, have been synthesized with azobenzenetetracarboxylic acid and isomeric bis(imidazole) ligands and characterized by elemental analyses, IR spectra, single-crystal X-ray diffraction, powder X-ray diffraction, and thermal analyses. X-ray results showed that 1, 2, and 4 had two-dimensional structures with 3,4L13 topology, while 3 was a three-dimensional coordination polymer with bbf topology. For 4, two types of activation strategies, solvent exchange + heating (which produced 4a) and direct heating (which produced 4b), were used to investigate the effect of a guest molecule in a flexible framework. Gas adsorption and iodine encapsulation properties of activated complexes were studied. The CO, uptake capacities for 4a and 4b were 3.62% and 9.50%, respectively, and Langmuir surface areas calculated from CO2 isotherms were 167.4 and 350.7 m(2)/g, respectively. Moreover, 4b exhibited 19.65% and 15.27% iodine uptake in vapor phase and cyclohexane solution, respectively, which corresponded to 1.47 and 0.97 molecules of iodine/formula unit, respectively. Moreover, photoluminescence properties of the complexes were studied.