0517288 - ÚFCH JH 2020 RIV US eng J - Journal Article
Strauss, I. - Mundstock, A. - Treger, M. - Lange, K. - Hwang, S. - Chmelik, Ch. - Rusch, P. - Bigall, N. C. - Pichler, T. - Shiozawa, Hidetsugu - Caro, J.
Metal-Organic Framework Co-MOF-74-Based Host-Guest Composites for Resistive Gas Sensing.
ACS Applied Materials and Interfaces. Roč. 11, č. 15 (2019), s. 14175-14181. ISSN 1944-8244. E-ISSN 1944-8252
R&D Projects: GA MŠMT LL1301
Institutional support: RVO:61388955
Keywords : tunable electrical-conductivity * mixed-valence * adsorption * mof * infiltration of MOFs * Guest@MOF * conducting MOFs * gas sensing * tetrathiafulvalene
OECD category: Physical chemistry
Impact factor: 8.758, year: 2019
Method of publishing: Open access

Increasing demands in the field of sensing, especially for gas detection applications, require new approaches to chemical sensors. Metal organic frameworks (MOFs) can play a decisive role owing to their outstanding performances regarding gas selectivity and sensitivity. The tetrathiafulvalene (TTF)-infiltrated MOF, CoMOF-74, has been prepared following the host guest concept and evaluated in resistive gas sensing. The Co-MOF-74-TTF crystal morphology has been characterized via X-ray diffraction and scanning electron microscopy, while the successful incorporation of TTF into the MOF has been validated via X-ray photoemission spectroscopy, thermogravimetric analysis, UV/vis, infrared (IR), and Raman investigations. We demonstrate a reduced yet ample uptake of CO, in the pores of the new material by IR imaging and adsorption isotherms. The nanocomposite Co-MOF-74-TTF exhibits an increased electrical conductivity in comparison to Co-MOF-74 which can be influenced by gas adsorption from a surrounding atmosphere. This effect could be used for gas sensing.
Permanent Link: http://hdl.handle.net/11104/0302598