Abstract: Three new three-dimensional (3D) metal–organic frameworks [M2(ttdc)2(dabco)] (M = Zn(II), 1-Zn; Cu(II), 1-Cu; and Zn/Cu, 1-ZnCu) based on thieno[3,2-b]thiophene-2,5-dicarboxylate (ttdc2−) were synthesized and characterized by a combination of physicochemical methods (single crystal X-ray diffraction, powder X-ray diffraction, chemical and thermogravimetric analyses and IR spectroscopy). 1-Cu demonstrated permanent porosity (Vpore = 0.790 cm3 g−1 and SBET = 1725 m2 g−1) and significant CO2, CH4, C2H2, C2H4 and C2H6 gas uptakes under ambient conditions. The adsorption selectivities for gas mixtures, calculated by IAST, were 10.8 (10.7), 14.6 (9.4), 1.7 (1.6) and 1.5 (1.6) for the equimolar gas mixture compositions CO2/N2, C2H6/CH4, C2H6/C2H4 and C2H6/C2H2 at 1 bar and 273 K (298 K), respectively. The mixed-metal compound 1-ZnCu was prepared by a crystal-to-crystal ion exchange metathesis reaction from 1-Zn with a 52% degree of ion substitution, confirmed by energy-dispersive X-ray spectroscopy, optical microscopy and single crystal X-ray diffraction analysis.

Cite: Dubskikh V.A. , Lysova A.A. , Kovalenko K.A. , Samsonenko D.G. , Dybtsev D.N. , Fedin V.P.
Metal-organic frameworks with a sulfur-rich heterocycle: synthesis, gas adsorption properties, and metal exchange
Dalton Transactions. 2024. V.53. N40. P.16654-16660. DOI: 10.1039/d4dt02209b WOS Scopus OpenAlex

Dates:

Submitted:	Aug 2, 2024
Accepted:	Sep 19, 2024
Published online:	Sep 20, 2024
Published print:	Oct 28, 2024

Identifiers:

Web of science:	WOS:001321085000001
Scopus:	2-s2.0-85205809214
OpenAlex:	W4402689771

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