TY  - JOUR
A1  - Mondal, Suvendu Sekhar
A1  - Bhunia, Asamanjoy
A1  - Attallah, Ahmed G.
A1  - Matthes, Philipp R.
A1  - Kelling, Alexandra
A1  - Schilde, Uwe
A1  - Müller-Buschbaum, Klaus
A1  - Krause-Rehberg, Reinhard
A1  - Janiak, Christoph
A1  - Holdt, Hans-Jürgen
T1  - Study of the Discrepancies between Crystallographic Porosity and Guest Access into Cadmium-Imidazolate Frameworks and Tunable Luminescence Properties by Incorporation of Lanthanides
JF  - Chemistry - a European journal
N2  - An extended member of the isoreticular family of metal-imidazolate framework structures, IFP-6 (IFP=imidazolate framework Potsdam), based on cadmium metal and an in situ functionalized 2-methylimidazolate-4-amide-5-imidate linker is reported. A porous 3D framework with 1D hexagonal channels with accessible pore windows of 0.52nm has been synthesized by using an ionic liquid (IL) linker precursor. IFP-6 shows significant gas uptake capacity only for CO2 and CH4 at elevated pressure, whereas it does not adsorb N-2, H-2, and CH4 under atmospheric conditions. IFP-6 is assumed to deteriorate at the outside of the material during the activation process. This closing of the metal-organic framework (MOF) pores is proven by positron annihilation lifetime spectroscopy (PALS), which revealed inherent crystal defects. PALS results support the conservation of the inner pores of IFP-6. IFP-6 has also been successfully loaded with luminescent trivalent lanthanide ions (Ln(III)=Tb, Eu, and Sm) in a bottom-up one-pot reaction through the in situ generation of the linker ligand and in situ incorporation of photoluminescent Ln ions into the constituting network. The results of photoluminescence investigations and powder XRD provide evidence that the Ln ions are not doped as connectivity centers into the frameworks, but are instead located within the pores of the MOFs. Under UV light irradiation, Tb@IFP-6 and Eu@IFP-6 ((exc)=365nm) exhibit observable emission changes to a greenish and reddish color, respectively, as a result of strong Ln 4f emissions.
KW  - adsorption
KW  - cadmium
KW  - ionic liquids
KW  - luminescence
KW  - metal-organic frameworks
Y1  - 2016
U6  - https://doi.org/10.1002/chem.201504757
SN  - 0947-6539
SN  - 1521-3765
VL  - 22
SP  - 6905
EP  - 6913
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - GEN
A1  - Mondal, Suvendu Sekhar
A1  - Dey, Subarna
A1  - Baburin, Igor A.
A1  - Kelling, Alexandra
A1  - Schilde, Uwe
A1  - Seifert, Gotthard
A1  - Janiak, Christoph
A1  - Holdt, Hans-Jürgen
T1  - Syntheses of two imidazolate-4-amide-5-imidate linker-based hexagonal metal–organic frameworks with flexible ethoxy substituent
N2  - A rare example of in situ linker generation with the formation of soft porous Zn- and Co-MOFs (IFP-9 and -10, respectively) is reported. The flexible ethoxy groups of IFP-9 and -10 protrude into the 1D hexagonal channels. The gas-sorption behavior of both materials for H2, CO2 and CH4 showed wide hysteretic isotherms, typical for MOFs having a flexible substituent which can give rise to a gate effect.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 234 
KW  - adsorption
KW  - behavior
KW  - carbon-dioxide
KW  - crystals
KW  - gases
KW  - ligand
KW  - pressure
KW  - selectivity
KW  - temperature
KW  - zinc
Y1  - 2013
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-94360
SP  - 9394
EP  - 9399
ER  - 
TY  - GEN
A1  - Mondal, Suvendu Sekhar
A1  - Bhunia, Asamanjoy
A1  - Baburin, Igor A.
A1  - Jäger, Christian
A1  - Kelling, Alexandra
A1  - Schilde, Uwe
A1  - Seifert, Gotthard
A1  - Janiak, Christoph
A1  - Holdt, Hans-Jürgen
T1  - Gate effects in a hexagonal zinc-imidazolate-4-amide-5-imidate framework with flexible methoxy substituents and CO2 selectivity
N2  - A new imidazolate-4-amide-5-imidate based MOF, IFP-7, is generated, having flexible methoxy groups, which act as molecular gates for guest molecules. This allows highly selective CO2 sorption over N2 and CH4 gases.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 233 
KW  - adsorption
KW  - capacity
KW  - carbon-dioxide capture
KW  - coordination polymer
KW  - flexibility
KW  - hydrogen storage
KW  - ligand
KW  - metal-organic frameworks
KW  - mixed-matrix membranes
KW  - separation
Y1  - 2013
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-94341
SP  - 7599
EP  - 7601
ER  -