TY - JOUR A1 - Mondal, Suvendu Sekhar A1 - Bhunia, Asamanjoy A1 - Kelling, Alexandra A1 - Schilde, Uwe A1 - Janiak, Christoph A1 - Holdt, Hans-Jürgen T1 - A supramolecular Co(II)₁₄-metal–organic cube in a hydrogen-bonded network and a Co(II)–organic framework with a flexible methoxy substituent JF - Chemical communications : ChemComm N2 - The reaction of 4,5-dicyano-2-methoxyimidazole (L1) with Co(NO3)2·6H2O under solvothermal conditions in DMF, a MOF, IFP-8 and a hydrogen-bonded network consisting of tetradecanuclear Co(II)14-metal organic cube (1) are achieved. 1 shows the bcu net with 14 cobalt atoms. KW - zinc Y1 - 2014 U6 - https://doi.org/10.1039/c3cc49698h SN - 2046-2069 VL - 2014 IS - 41 SP - 5441 EP - 5443 PB - Royal Society of Chemistry ER - TY - JOUR A1 - Mondal, Suvendu Sekhar A1 - Mueller, Holger A1 - Junginger, Matthias A1 - Kelling, Alexandra A1 - Schilde, Uwe A1 - Strehmel, Veronika A1 - Holdt, Hans-Jürgen T1 - Imidazolium 2-substituted 4,5-dicyanoimidazolate ionic liquids: synthesis, crystal structures and structure-thermal property relationships JF - Chemistry - a European journal N2 - Thirty six novel ionic liquids (ILs) with 1-butyl-3-methylimidazolium and 3-methyl-1-octylimidazolium cations paired with 2-substitited 4,5-dicyanoimidazolate anions (substituent at C2=chloro, bromo, methoxy, vinyl, amino, methyl, ethyl, propyl, isopropyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl and phenyl) have been synthesized and characterized by using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and single-crystal X-ray crystallography. The effects of cation and anion type and structure on the thermal properties of the resulting ionic liquids, including several room temperature ionic liquids (RTILs) are examined and discussed. ILs exhibited large liquid and crystallization ranges and formed glasses on cooling with glass transition temperatures in the range of -22 to -68 degrees C. The effects of alkyl substituents of the imidazolate anion reflected the crystallization, melting points and thermal decomposition of the ILs. The Coulombic packing force, van der Waals forces and size of the anions can be considered for altering the thermal transitions. Three crystal structures of the ILs were determined and the effects of changes to the cations and anions on the packing of the structure were investigated. KW - crystal structures KW - imidazole KW - ion exchange KW - ionic liquids KW - pi-pi stacking Y1 - 2014 U6 - https://doi.org/10.1002/chem.201304934 SN - 0947-6539 SN - 1521-3765 VL - 20 IS - 26 SP - 8170 EP - 8181 PB - Wiley-VCH CY - Weinheim ER - TY - JOUR A1 - Mondal, Suvendu Sekhar A1 - Bhunia, Asamanjoy A1 - Kelling, Alexandra A1 - Schilde, Uwe A1 - Janiak, Christoph A1 - Holdt, Hans-Jürgen T1 - Giant Zn-14 molecular building block in hydrogen-bonded network with permanent porosity for gas uptake JF - Journal of the American Chemical Society N2 - In situ imidazolate-4,5-diamide-2-olate linker generation leads to the formation of a [Zn-14(L2)(12)(O)-(OH)(2)(H2O)(4)] molecular building block (MBB) with a Zn-6 octahedron inscribed in a Zn-8 cube. The MBBs connect by amide-amide hydrogen bonds to a 3D robust supramolecular network which can be activated for N-2, CO2, CH4, and H-2 gas sorption. Y1 - 2014 U6 - https://doi.org/10.1021/ja410595q SN - 0002-7863 VL - 136 IS - 1 SP - 44 EP - 47 PB - American Chemical Society CY - Washington ER - TY - JOUR A1 - Mondal, Suvendu Sekhar A1 - Bhunia, Asamanjoy A1 - Kelling, Alexandra A1 - Schilde, Uwe A1 - Janiak, Christoph A1 - Holdt, Hans-Jürgen T1 - A supramolecular Co(II)(14)- metal-organic cube in a hydrogen-bonded network and a Co(II)-organic framework with a flexible methoxy substituent JF - Chemical communications N2 - The reaction of 4,5-dicyano-2-methoxyimidazole (L1) with Co(NO3)(2.) 6H(2)O under solvothermal conditions in DMF, a MOF, IFP-8 and a hydrogen-bonded network consisting of tetradecanuclear Co(II)(14)-metal organic cube (1) are achieved. 1 shows the bcu net with 14 cobalt atoms. Y1 - 2014 U6 - https://doi.org/10.1039/c3cc49698h SN - 1359-7345 SN - 1364-548X VL - 50 IS - 41 SP - 5441 EP - 5443 PB - Royal Society of Chemistry CY - Cambridge ER - TY - JOUR A1 - Mondal, Suvendu Sekhar A1 - Bhunia, Asamanjoy A1 - Demeshko, Serhiy A1 - Kelling, Alexandra A1 - Schilde, Uwe A1 - Janiak, Christoph A1 - Holdt, Hans-Jürgen T1 - Synthesis of a Co(II)-imidazolate framework from an anionic linker precursor: gas-sorption and magnetic properties JF - CrystEngComm N2 - A Co(II)-imidazolate-4-amide-5-imidate based MOF, IFP-5, is synthesized by using an imidazolate anion-based novel ionic liquid as a linker precursor under solvothermal conditions. IFP-5 shows significant amounts of gas (N-2, CO2, CH4 and H-2) uptake capacities. IFP-5 exhibits an independent high spin Co(II) centre and antiferromagnetic coupling. Y1 - 2014 U6 - https://doi.org/10.1039/c3ce42040j SN - 1466-8033 VL - 16 IS - 1 SP - 39 EP - 42 PB - Royal Society of Chemistry CY - Cambridge ER -