35681
2012
2012
eng
11630
11640
11
37
18
article
Wiley-VCH
Weinheim
1
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An isoreticular family of microporous metal-organic frameworks based on zinc and 2-substituted imidazolate-4-amide-5-imidate Syntheses, structures and properties
We report on a new series of isoreticular frameworks based on zinc and 2-substituted imidazolate-4-amide-5-imidate (IFP-14, IFP=imidazolate framework Potsdam) that form one-dimensional, microporous hexagonal channels. Varying R in the 2-substitued linker (R=Me (IFP-1), Cl (IFP-2), Br (IFP-3), Et (IFP-4)) allowed the channel diameter (4.01.7 angstrom), the polarisability and functionality of the channel walls to be tuned. Frameworks IFP-2, IFP-3 and IFP-4 are isostructural to previously reported IFP-1. The structures of IFP-2 and IFP-3 were solved by X-ray crystallographic analyses. The structure of IFP-4 was determined by a combination of PXRD and structure modelling and was confirmed by IR spectroscopy and 1H MAS and 13C CP-MAS NMR spectroscopy. All IFPs showed high thermal stability (345400?degrees C); IFP-1 and IFP-4 were stable in boiling water for 7 d. A detailed porosity analysis was performed on the basis of adsorption measurements by using various gases. The potential of the materials to undergo specific interactions with CO2 was investigated by measuring the isosteric heats of adsorption. The capacity to adsorb CH4 (at 298 K), CO2 (at 298 K) and H2 (at 77 K) at high pressure were also investigated. In situ IR spectroscopy showed that CO2 is physisorbed on IFP-14 under dry conditions and that both CO2 and H2O are physisorbed on IFP-1 under moist conditions.
Chemistry - a European journal
10.1002/chem.201200889
0947-6539
wos:2011-2013
WOS:000308313100020
Holdt, HJ (reprint author), Univ Potsdam, Inst Chem, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany., holdt@chem.uni-potsdam.de
Deutsche Forschungsgemeinschaft [SPP-1362]
Franziska Debatin
Karsten Behrens
Jens Weber
Igor A. Baburin
Arne Thomas
Johannes Schmidt
Irena Senkovska
Stefan Kaskel
Alexandra Kelling
Niklas Hedin
Zoltan Bacsik
Stefano Leoni
Gotthard Seifert
Christian Jäger
Christina Günter
Uwe Schilde
Alwin Friedrich
Hans-Jürgen Holdt
eng
uncontrolled
adsorption
eng
uncontrolled
metal- organic frameworks
eng
uncontrolled
microporous materials
eng
uncontrolled
N
eng
uncontrolled
O ligands
eng
uncontrolled
zinc
Institut für Geowissenschaften
Referiert
Institut für Erd- und Umweltwissenschaften
36148
2012
2012
eng
791
795
5
2
4
article
American Chemical Society
Washington
1
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CuO nanoparticles from the Strongly Hydrated Ionic Liquid Precursor (ILP) Tetrabutylammonium Hydroxide evaluation of the Ethanol Sensing Activity
The sensing potential of CuO nanoparticles synthesized via. precipitation from a water/ionic liquid precursor (ILP) mixture was investigated. The particles have a moderate surface area of 66 m(2)/g after synthesis, which decreases upon thermal treatment to below 5 m(2)/g. Transmission electron microscopy confirms crystal growth upon annealing, likely due to sintering effects. The as-synthesized particles can be used for ethanol sensing. The respective sensors show fast response and recovery times of below 10 s and responses greater than 2.3 at 100 ppm of ethanol at 200 degrees C, which is higher than any CuO-based ethanol sensor described so far.
ACS applied materials & interfaces
10.1021/am201427q
1944-8244
wos:2011-2013
WOS:000300644500043
Taubert, A (reprint author), Univ Potsdam, Inst Chem, D-14476 Potsdam, Germany., ataubert@uni-potsdam.de
Deutsche Forschungsgemeinschaft [TA571/2-1, 3-1, 7-1]; University of
Potsdam; MPI of Colloids and Interfaces (Colloid Chemistry Department)
Andreas Taubert
Franziska Stange
Zhonghao Li
Mathias Junginger
Christina Günter
Mike Neumann
Alwin Friedrich
eng
uncontrolled
ionic liquids
eng
uncontrolled
ionic liquid precursors
eng
uncontrolled
tetrabutylammonium hydroxide
eng
uncontrolled
nanoparticles
eng
uncontrolled
CuO
eng
uncontrolled
gas sensing
Institut für Chemie
Referiert