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Dalton Trans

Title:		Enhanced sorption in an indium-acetylenedicarboxylate metal-organic framework with unexpected chains of cis-mu-OH-connected InO(6) octahedra
Author(s):		Woschko D; Yilmaz S; Jansen C; Spiess A; Oestreich R; Matemb Ma Ntep TJ; Janiak C;
Address:		"Institut fur Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universitat Dusseldorf, D-40204 Dusseldorf, Germany. janiak@uni-duesseldorf.de"
Journal Title:		Dalton Trans
Year:		2023
Volume:		20230124
Issue:		4
Page Number:		977 - 989
DOI:		10.1039/d2dt03719j
ISSN/ISBN:		1477-9234 (Electronic) 1477-9226 (Linking)
Abstract:		"Single crystals of the new metal-organic framework (MOF) In-adc (HHUD-4) were obtained through the reaction of linear acetylenedicarboxylic acid (H(2)adc) with In(NO(3))(3).xH(2)O as a racemic conglomerate in the chiral tetragonal space groups P4(3)22 and P4(1)22. Fundamentally different from other MOFs with linear linkers and trans-mu-OH-connected infinite MO(6) secondary building units as in the MIL-53-type, the linear adc(2-) linker leads to the formation of cis-mu-OH connected InO(6) polyhedra, which have otherwise only been found before for V-shaped ligands, as in CAU-10-H. A far-reaching implication of this finding is the possibility that trans-mu-OH/straight MIL-53-type MOFs will have polymorphs of CAU-10-H cis-mu-OH/helical topology and vice versa. HHUD-4 is a microporous MOF with a BET surface area of up to 940 m(2) g(-1) and a micropore volume of up to 0.39 cm(3) g(-1). Additionally, HHUD-4 features good adsorption uptakes of 3.77 mmol g(-1) for CO(2) and 1.25 mmol g(-1) for CH(4) at 273 K and 1 bar, respectively, and a high isosteric heat of adsorption of 11.4 kJ mol(-1) for H(2) with a maximum uptake of 6.36 mmol g(-1) at 77 K and 1 bar. Vapor sorption experiments for water and volatile organic compounds (VOCs) such as benzene, cyclohexane and n-hexane yielded uptake values of 135, 269, 116 and 205 mg g(-1), respectively, at 293 K. While HHUD-4 showed unremarkable results for water uptake and low stability for water, it exhibited good stability with steep VOC uptake steps at low relative pressures and a high selectivity of 17 for benzene/cyclohexane mixtures"
Keywords:		*Metal-Organic Frameworks Indium Benzene/chemistry Gases Water;
Notes:		"PubMed-not-MEDLINEWoschko, Dennis Yilmaz, Suheyla Jansen, Christian Spiess, Alex Oestreich, Robert Matemb Ma Ntep, Tobie J Janiak, Christoph eng England 2023/01/06 Dalton Trans. 2023 Jan 24; 52(4):977-989. doi: 10.1039/d2dt03719j"