scholarly journals A Heterometallic Three-Dimensional Metal−Organic Framework Bearing an Unprecedented One-Dimensional Branched-Chain Secondary Building Unit

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2190
Author(s):  
Jing Chen ◽  
Meng-Yao Chao ◽  
Yan Liu ◽  
Bo-Wei Xu ◽  
Wen-Hua Zhang ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
3D Structure ◽  
Three Dimensional ◽  
Solvothermal Reaction ◽  
Secondary Building Unit ◽  
One Dimensional ◽  
Building Unit ◽  
Metal Organic ◽  
Branched Chain ◽  
Organic Framework

A heterometallic metal−organic framework (MOF) of [Cd6Ca4(BTB)6(HCOO)2(DEF)2(H2O)12]∙DEF∙xSol (1, H3BTB = benzene-1,3,5-tribenzoic acid; DEF = N,N′-diethylformamide; xSol. = undefined solvates within the pore) was prepared by solvothermal reaction of Cd(NO3)2·4H2O, CaO and H3BTB in a mixed solvent of DEF/H2O/HNO3. The compatibility of these two divalent cations from different blocks of the periodic table results in a solid-state structure consisting of an unusual combination of a discrete V-shaped heptanuclear cluster of [Cd2Ca]2Ca′ and an infinite one-dimensional (1D) chain of [Cd2CaCa′]n that are orthogonally linked via a corner-shared Ca2+ ion (denoted as Ca′), giving rise to an unprecedented branched-chain secondary building unit (SBU). These SBUs propagate via tridentate BTB to yield a three-dimensional (3D) structure featuring a corner-truncated P41 helix in MOF 1. This outcome highlights the unique topologies possible via the combination of carefully chosen s- and d-block metal ions with polydentate ligands.

scholarly journals The Elusive Nitro-Functionalised Member of the IRMOF-9 Family

2019 ◽  
Vol 72 (10) ◽  
pp. 811 ◽  
Author(s):  
Luke Conte ◽  
Tian-You Zhou ◽  
Omid T. Qazvini ◽  
Lujia Liu ◽  
David R. Turner ◽  
...  
Keyword(s):  
Dicarboxylic Acid ◽  
Surface Area ◽  
Metal Organic Framework ◽  
Bet Surface Area ◽  
Solvothermal Reaction ◽  
X Ray Diffraction ◽  
Secondary Building Unit ◽  
Initial Product ◽  
Building Unit ◽  
Metal Organic

The solvothermal reaction of 2-nitro-[1,1′‐biphenyl]‐4,4′‐dicarboxylic acid (H2bpdcNO2) with Zn(NO3)2·6H2O in DMF solvent does not give a functionalised variant of IRMOF-9. Single-crystal X-ray diffraction analysis shows the major initial product of this reaction, WUF-21 (WUF=Wollongong University Framework), is a porous interpenetrated diamondoid metal–organic framework (MOF) with a secondary building unit that ‘doubly straps’ eight bridging bpdcNO2 ligands in a distorted tetrahedral shape around an unusual pentazinc core. A second porous MOF phase (WUF-23) containing a large and novel dodecazinc secondary building unit forms in the same reaction and eventually predominates in solutions containing formate anion, which arises from the hydrolysis of DMF. Doping the starting ligand with [1,1′‐biphenyl]‐4,4′‐dicarboxylic acid (H2bpdc) provides a facile way to grow nitro-functionalised IRMOF-9, hereafter denoted as WUF-22, where the dopant is carried through into the product. Activated WUF-22 is a microporous solid with an apparent Brunauer–Emmett–Teller (BET) surface area of 2497m2g−1, which matches well with geometric surface area calculations. The CO2 adsorption properties of WUF-22 are reported.

ROD-8, a rod MOF with a pyrene-cored tetracarboxylate linker: framework disorder, derived nets and selective gas adsorption

CrystEngComm ◽  
2014 ◽  
Vol 16 (28) ◽  
pp. 6291-6295 ◽  
Author(s):  
Ru-Jin Li ◽  
Mian Li ◽  
Xiao-Ping Zhou ◽  
Seik Weng Ng ◽  
Michael O'Keeffe ◽  
...  
Keyword(s):  
Benzoic Acid ◽  
Gas Adsorption ◽  
Metal Organic Framework ◽  
Secondary Building Unit ◽  
Building Unit ◽  
Metal Organic ◽  
Organic Framework

Reported here is a new CdII-based metal–organic framework (MOF), ROD-8, based on the rod secondary building unit (SBU) and tetratopic linker 1,3,6,8-tetrakis(p-benzoic acid)pyrene.

Structure andMagnetic Properties of a Three-dimensional Metal-organic Framework: [Co(L)(H2O)2]·H2O

2011 ◽  
Vol 66 (4) ◽  
pp. 355-358
Author(s):  
Man-Sheng Chen ◽  
Yi-Fang Deng ◽  
Zhi-Min Chen ◽  
Chun-Hua Zhang ◽  
Dai-Zhi Kuang
Keyword(s):  
Metal Organic Framework ◽  
Three Dimensional ◽  
Solvothermal Reaction ◽  
Monoclinic Space Group ◽  
Cell Parameters ◽  
Carboxylate Groups ◽  
Dimensional Network ◽  
Metal Organic ◽  
Acid Compound ◽  
Organic Framework

A unique 3D fourfold interpenetrated metal-organic framework, [Co(L)(H2O)2]・H2O (1), has been synthesized by the solvothermal reaction of H2L with Co(NO3)2・6H2O (H2L = 5-(isonicotinamido) isophthalic acid). Compound 1 crystallizes in the monoclinic space group P21/c, with the cell parameters: a = 81301(8), b = 107711(11), c = 167697(16) Å , β = 92.656(2) °, V = 14669(3) Å3, R1 = 0.0325 and wR2 = 0.0833. Its framework has (10,3)-b topology, where the cobalt atoms are alternately bridged by the pyridyl and the carboxylate groups of the L2− ligands into a three-dimensional network. Compound 1 displays antiferromagnetic interactions. Above 40 K, χm −1 obeys the Curie- Weiss law with C = 3.28 emu Kmol−1 andΘ = −0.66 K.

Characterization and gas adsorption of a novel three-dimensional metal–organic framework (MOF) generated from a new polydentate fluorene-bridged ligand

2018 ◽  
Vol 74 (2) ◽  
pp. 212-217 ◽  
Author(s):  
Shu-Ying Han ◽  
Xue Niu ◽  
Jia Wang ◽  
Guo-Xia Jin ◽  
Ai Liu ◽  
...  
Keyword(s):  
Gas Adsorption ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Solvothermal Reaction ◽  
Two Dimensional ◽  
Polydentate Ligand ◽  
Dimensional Network ◽  
Metal Organic ◽  
Organic Framework

A polydentate ligand bridged by a fluorene group, namely 9,9-bis(2-hydroxyethyl)-2,7-bis(pyridin-4-yl)fluorene (L), has been prepared under solvothermal conditions in acetonitrile. Crystals of the three-dimensional metal–organic framework (MOF) poly[[[μ3-9,9-bis(2-hydroxyethyl)-2,7-bis(pyridin-4-yl)fluorene-κ3 N:N′:O]bis(methanol-κO)(μ-sulfato-κ2 O:O′)nickel(II)] methanol disolvate], {[Ni(SO4)(C27H24N2O2)(CH3OH)]·2CH3OH} n , (I), were obtained by the solvothermal reaction of L and NiSO4 in methanol. The ligand L forms a two-dimensional network in the crystallographic bc plane via two groups of O—H...N hydrogen bonds and neighbouring two-dimensional planes are completely parallel and stack to form a three-dimensional structure. In (I), the NiII ions are linked by sulfate ions through Ni—O bonds to form inorganic chains and these Ni-containing chains are linked into a three-dimensional framework via Ni—O and Ni—N bonds involving the polydentate ligand L. With one of the hydroxy groups of L coordinating to the NiII atom, the torsion angle of the hydroxyethyl group changes from that of the uncoordinated molecule. In addition, the adsorption properties of (I) with carbon dioxide were investigated.

Synthesis, Structure, and Properties of a Chiral Zinc(II) Metal-Organic Framework Featuring Linear Trinuclear Secondary Building Blocks

2012 ◽  
Vol 65 (12) ◽  
pp. 1662 ◽  
Author(s):  
Zilu Chen ◽  
Chuanbing Zhang ◽  
Xianlin Liu ◽  
Zhong Zhang ◽  
Fupei Liang
Keyword(s):  
Building Block ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Building Blocks ◽  
Triangular Prism ◽  
Structure And Properties ◽  
Adsorption Selectivity ◽  
One Dimensional ◽  
Metal Organic ◽  
Organic Framework

A chiral metal-organic framework formulated as [Zn3(L-TMTA)2(4,4′-bpy)4]·24H2O (1) was prepared from the reaction of Zn(NO3)2·6H2O with trimesoyltri(L-alanine) (L-TMTAH3) in the presence of 4,4′-bipyridine (4,4′-bpy). Compound 1 features linear trinuclear secondary building blocks [Zn3(syn-syn-COO)2(μ2,η3-COO)2]2+. Each linear trinuclear secondary building block is further linked to another eight ones around it by four L-TMTA3– ligands and eight 4,4′-bpy ligands, leading to the construction of a uninodal three-dimensional framework with triangular prism-like one-dimensional channels. Dehydrated compound 1 displays remarkable adsorption selectivity on CO2 and water vapour over N2 gas.

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