MOFs, MILs and more: concepts, properties and applications for porous coordination networks (PCNs)

Janiak, Christoph; Vieth, Jana K.

doi:10.1039/c0nj00275e

Cited by 1,068 publications

(560 citation statements)

References 411 publications

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“…9 Even though MOFs show lots of advantages for various applications, 2,4,[10][11][12] most of the MOF materials tend to experience a dramatic drop in their surface area and adsorption capacity when exposed to moisture. 10 Moreover, the narrow micropores of MOFs restrict the fast gas diffusion inside the pores, limiting the real applications of MOFs in adsorption, catalysis and gas separation.…”

Section: Introductionmentioning

confidence: 99%

In situ synthesis of zeolitic imidazolate frameworks/carbon nanotube composites with enhanced CO2 adsorption

et al. 2014

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A series of ZIF-8 and hydroxyl-functionalized carbon nanotube (CNT) composites were successfully synthesized by the solvothermal method. The obtained ZIF-8/CNT composites were characterized by XRD, SEM, TGA and N 2 adsorption at 77 K. The contents of ZIF-8 and CNTs in the composites were calculated from thermal analysis data. CO 2 and N 2 adsorption at 273 K on the composites was also investigated and compared. The ZIF-8 particles in the composites exhibit similar crystal structures and morphology to those of pure ZIF-8, but display enhanced thermal stability. The surface areas and pore volumes of the ZIF-8/CNT composites are higher than the values calculated for hypothetical physical mixtures, and the synergetic effect between ZIF-8 and CNTs can be proposed. This phenomenon demonstrates that the incorporation of CNTs into ZIF-8 can facilitate the nucleation and crystallization of ZIF-8. As a result, the composites with an optimal CNT content (3.63 wt%) show improved CO 2 adsorption capacity and higher relative selectivity for CO 2 /N 2 compared with pure ZIF-8.

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Section: Introductionmentioning

confidence: 99%

In situ synthesis of zeolitic imidazolate frameworks/carbon nanotube composites with enhanced CO2 adsorption

et al. 2014

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“…gas storage, chemical separation and catalysis [3,4]. Halogenidorhodates(III) with organic cations constitute asubgroup of the large family of inorganic-organic hybrids.…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of the inorganic-organic hybrid material tris(N,Nʹ- dimethylethylenediammonium) bis(hexachloridorhodate(III)) dihydrate, C6H23Cl6N3ORh

Bujak

Frank

2014

Zeitschrift Für Kristallographie - New Crystal Structures

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Source of material (C 4 H 14 N 2 ) 3 [RhCl 6 ] 2 ×2H 2 Ow as obtained according to the previously reported method [1,2]. The solution of N,N'-dimethylethylenediamine (0.12 ml,1.11 mmol) in 3mlofconcentrated hydrochloric acid was carefully added to the test tube containing 0.10 ml solution of RhCl 3 ×3H 2 O(0.15 mmol RhCl 3 )in6mol/l hydrochloric acid covered by an 1mllayer of concentrated hydrochloricacid. Theobtained triple-phase system was left at room temperature forming single crystals. Experimental detailsAll Hatoms were located in subsequent difference Fourier maps. Theridingmodel was applied to the Hatomsbonded to Cand N atoms,whereas thepositions of thewater Hatoms were refined restrainingt he O-Ha nd H×××Hd istances to 0.83 and 1.35 Å, respectively [10].The isotropicdisplacementparametersofHatomswere constrained to 1.2 and 1.5 times that of the equivalent isotropicdisplacementparametersoftheir parent N/C-methylene andO/C-methylatoms,respectively. DiscussionCrystal engineering of inorganic-organic hybrid materials is relevant to several important applications including e.g. gas storage, chemical separation and catalysis [3,4]. Halogenidorhodates(III) with organic cations constitute asubgroup of the large family of inorganic-organic hybrids. The properties of those mixed materials relate to both the inorganic rigid structural skeleton that is usually given by the arrangement of isolated [RhX 6 ] 3-octahedra, and to them ore flexible organic substructure. Also, in most cases, along with the mononuclear inorganic anions water molecules and/or aquahydrogen cations are present in the inorganic segments of those solids [5,6].T he asymmetric unit of the title hexachloridorhodate(III)consists of two half isolated inorganic [RhCl 6 ] 3-octahedra,o ne andah alf of thef lexible organic (C 4 H 14 N 2 ) 2+ cations, and one water molecule. The components of the solid are joined by N/C/O-H×××Cl hydrogen bonds. The shortest is an O-H×××Cl bond with the O×××Cl distance of 3.217(2) Å.The most characteristic structural feature of thesolid is the presence of twoi ndependent octahedraw iths ignificantly differente nvironments. The arrangement of chlorido ligands around the central Rh III atomsslightly deviates from the ideal octahedral geometry. The lengths of crystallographically independent Rh-Cl bonds vary from 2.3379(5) to 2.3480(5) Åa nd from 2.3422 (5) octahedron is surrounded by six N8N8 I cations ( I -x,1-y,1-z;all located at inversion centres) and four water molecules, whereas Z. Kristallogr.

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“…According to elemental and thermogravimetry (TG) analysis, the compositions of the compounds are Co(NCS) 2 (hmpy) 4 (1), Co(NCS) 2 (hmpy) 4ˆH2 O (1-H 2 O), Co(NCS) 2 -(hmpy) 2 (EtOH) 2 (2), Co(NCS) 2 (hmpy) 2 -(H 2 O) 2 (3) and Co(NCS) 2 (hmpy) 2 (5). Additionally, single crystals of a further compound of composition Co(NCS) 2 (4-(hmpy)) 2¨4 H 2 O (4) were obtained.…”

Section: Synthetic Aspectsmentioning

confidence: 99%

“…The synthesis of new coordination polymers with desired physical properties is a major field in coordination chemistry [1][2][3][4]. For this purpose, structure-property relationships are investigated systematically and strategies for a rational construction of their crystal structures are required.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Structures and Properties of Cobalt Thiocyanate Coordination Compounds with 4-(hydroxymethyl)pyridine as Co-ligand

et al. 2016

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Abstract:Reaction of Co(NCS) 2 with 4-(hydroxymethyl)pyridine (hmpy) leads to the formation of six new coordination compounds with the composition [Co(NCS) 2 (hmpy) (4) and [Co(NCS) 2 (hmpy) 2 ] n (5). They were characterized by single crystal and powder X-ray diffraction experiments, thermal and elemental analysis, IR and magnetic measurements. Compound 1 and 1-H 2 O form discrete complexes, in which the Co(II) cations are octahedrally coordinated by two terminal thiocyanato anions and four 4-(hydroxymethyl)pyridine ligands. Discrete complexes were also observed for compounds 2 and 3 where two of the hmpy ligands were substituted by solvent, either water (3) or ethanol (2). In contrast, in compounds 4 and 5, the Co(II) cations are linked into chains by bridging 4-(hydroxymethyl)pyridine ligands. The phase purity was checked with X-ray powder diffraction. Thermogravimetric measurements showed that compound 3 transforms into 5 upon heating, whereas the back transformation occurs upon resolvation. Magnetic measurements did not show any magnetic exchange via the hmpy ligand for compound 5.

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MOFs, MILs and more: concepts, properties and applications for porous coordination networks (PCNs)

Cited by 1,068 publications

References 411 publications

In situ synthesis of zeolitic imidazolate frameworks/carbon nanotube composites with enhanced CO2 adsorption

In situ synthesis of zeolitic imidazolate frameworks/carbon nanotube composites with enhanced CO2 adsorption

Crystal structure of the inorganic-organic hybrid material tris(N,Nʹ- dimethylethylenediammonium) bis(hexachloridorhodate(III)) dihydrate, C6H23Cl6N3ORh

Synthesis, Structures and Properties of Cobalt Thiocyanate Coordination Compounds with 4-(hydroxymethyl)pyridine as Co-ligand

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