Zn/Mn–MOFs with `S-shaped' packing modes

2014 ◽  
Vol 70 (5) ◽  
pp. 502-507
Author(s):  
Hong-Jie Fan ◽  
Qian-Qian Xu ◽  
Tie-Zhen Ren ◽  
Xiang-Ying Xing ◽  
Kirsten E. Christensen
Keyword(s):  
Metal Ion ◽  
Metal Organic Frameworks ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Hydrothermal Conditions ◽  
Dimensional Network ◽  
Metal Organic

Two novel polymers exhibiting metal–organic frameworks (MOFs) have been synthesized by the combination of a metal ion with a benzene-1,3,5-tricarboxylate ligand (BTC) and 1,10-phenanthroline (phen) under hydrothermal conditions. The first compound, poly[[(μ4-benzene-1,3,5-tricarboxylato-κ4 O:O′:O′′:O′′′)(μ-hydroxido-κ2 O:O)bis(1,10-phenanthroline-κ2 N,N′)dizinc(II)] 0.32-hydrate], {[Zn2(C9H3O6)(OH)(C12H8N2)2]·0.32H2O} n , denoted Zn–MOF, forms a two-dimensional network in which a binuclear Zn2 cluster serves as a 3-connecting node; the BTC trianion also acts as a 3-connecting centre. The overall topology is that of a 63 net. The phen ligands serve as appendages to the network and interdigitate with phen ligands belonging to adjacent parallel sheets. The second compound, poly[[(μ6-benzene-1,3,5-tricarboxylato-κ7 O 1,O 1′:O 1:O 3:O 3′:O 5:O 5′)(μ3-hydroxido-κ2 O:O:O)(1,10-phenanthroline-κ2 N,N′)dimanganese(II)] 1.26-hydrate], {[Mn2(C9H3O6)(OH)(C12H8N2)]·1.26H2O} n , denoted Mn–MOF, exists as a three-dimensional network in which an Mn4 cluster serves as a 6-connecting unit, while the BTC trianion again plays the role of a 3-connecting centre. The overall topology is that of the rutile net. Phen ligands act as appendages to the network and form the `S-shaped' packing mode.

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.

Ab Initio Study of the Adsorption of Small Molecules on Metal–Organic Frameworks with Oxo-centered Trimetallic Building Units: The Role of the Undercoordinated Metal Ion

2015 ◽  
Vol 54 (17) ◽  
pp. 8251-8263 ◽  
Author(s):  
Andreas Mavrandonakis ◽  
Konstantinos D. Vogiatzis ◽  
A. Daniel Boese ◽  
Karin Fink ◽  
Thomas Heine ◽  
...  
Keyword(s):  
Ab Initio ◽  
Small Molecules ◽  
Metal Ion ◽  
Metal Organic Frameworks ◽  
Ab Initio Study ◽  
Metal Organic

Controllable assembly of a three-dimensional metal–organic supramolecular framework including π–π stacking interactions

2012 ◽  
Vol 69 (1) ◽  
pp. 8-10
Author(s):  
Hua Cai ◽  
Ying Guo ◽  
Jian-Gang Li
Keyword(s):  
Three Dimensional ◽  
Mixed Ligand ◽  
Stacking Interactions ◽  
Two Dimensional ◽  
Supramolecular Framework ◽  
Organic Complex ◽  
Π Stacking ◽  
Dimensional Network ◽  
Metal Organic Complex ◽  
Metal Organic

The mixed-ligand metal–organic complex poly[(μ3-phthalato)[μ2-3-(pyridin-2-yl)-1H-pyrazol-1-ido]dicopper(II)], [Cu2(C8H4O4)(C8H6N3)2]n, has been synthesized by the reaction of copper(II) acetate with 2-(1H-pyrazol-3-yl)pyridine (HL) and phthalic acid. The binuclear chelating–bridgingLunits are further linked by bridging phthalate ligands into a two-dimensional network parallel to the (010) plane. The two-dimensional networks are extended into a three-dimensional supramolecular architectureviaπ–π stacking interactions.

Fluoride sensing performance of fluorescent NH2-MIL-53(Al): 2D Nanosheets vs. 3D Bulk

2021 ◽  
Author(s):  
Zixuan Li ◽  
Deyi Zhan ◽  
Abdul Saeed ◽  
Nanjing Zhao ◽  
Junfeng Wang ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Active Sites ◽  
Metal Organic Frameworks ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Metal Organic ◽  
2D Nanosheets ◽  
Fluoride Sensing ◽  
Sensing Performance

Due to the ultra-thin morphology, larger specific surface area and more exposed active sites, two-dimensional (2D) metal-organic frameworks (MOFs) nanosheets can break the limitations of three-dimensional (3D) MOFs in sensitivity,...

The crystal structure and photocatalytic properties of a three-dimensional cadmium(II) metal–organic framework: poly[bis(μ3-benzene-1,2-dicarboxylato)[μ2-1,4-bis(pyridin-3-ylmethoxy)benzene]dicadmium(II)]

2016 ◽  
Vol 72 (3) ◽  
pp. 174-178 ◽  
Author(s):  
Cai-Xia Yu ◽  
Yan-Ping Gao ◽  
Xiao-Qing Cui ◽  
Meng-Jiao Guo ◽  
Lei-Lei Liu
Keyword(s):  
Organic Contaminants ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Three Dimensional ◽  
Green Technology ◽  
Coordination Geometry ◽  
Asymmetric Unit ◽  
One Dimensional ◽  
Dimensional Network ◽  
Metal Organic

Photocatalysis is a green technology for the treatment of all kinds of contaminants and has advantages over other treatment methods. Recently, much effort has been devoted to developing new photocatalytic materials based on metal–organic frameworks for use in the degradation of many kinds of organic contaminants. With the aim of searching for more effective photocatalysts, the title three-dimensional coordination polymer, [Cd2(C8H4O4)2(C18H16N2O2)]n, was prepared. The asymmetric unit contains one CdIIcation, one benzene-1,2-dicarboxylate anion (denotedL2−) and half of a centrosymmetric 1,4-bis(pyridin-3-ylmethoxy)benzene ligand (denoted bpmb). Each CdIIcentre is five-coordinated by four carboxylate O atoms from twoL2−ligands and by one N atom from a bpmb ligand, forming a disordered pentagonal pyramidal coordination geometry. The CdIIcentres are interlinked byL2−ligands to form a one-dimensional [Cd2L2]nchain. Adjacent chains are further connected by bpmb linkers, giving rise to a two-dimensional network, and these networks are pillared by bpmb to afford a three-dimensional framework with a 33.42.63.71.81topology. Each grid in the framework has large channels which are filled mainly by the two other equivalent frameworks to form a threefold interpenetrating net. The compound exhibits relatively good photocatalytic activity towards the degradation of methylene blue in aqueous solution under UV irradiation.

Two new NiII and ZnII metal–organic frameworks of glutarate and 1,4-bis[(2-methyl-1H-imidazol-1-yl)methyl]benzene ligands: syntheses, structures and luminescence sensing properties

2020 ◽  
Vol 76 (2) ◽  
pp. 148-158
Author(s):  
Fang-Hua Zhao ◽  
Zhong-Lin Li ◽  
Shu-Fang Zhang ◽  
Jian-Hui Han ◽  
Mei Zhang ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Three Dimensional ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
One Dimensional ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Metal Organic ◽  
3D Framework ◽  
Methyl Benzene

Two new metal–organic frameworks (MOFs), namely, three-dimensional poly[diaquabis{μ2-1,4-bis[(2-methyl-1H-imidazol-1-yl)methyl]benzene}bis(μ2-glutarato)dinickel(II)] monohydrate], {[Ni2(C5H6O4)2(C16H18N4)2(H2O)2]·H2O} n or {[Ni2(Glu)2(1,4-mbix)2(H2O)2]·H2O} n , (I), and two-dimensional poly[[{μ2-1,4-bis[(2-methyl-1H-imidazol-1-yl)methyl]benzene}(μ2-glutarato)zinc(II)] tetrahydrate], {[Zn(C5H6O4)(C16H18N4)]·4H2O} n or {[Zn(Glu)(1,4-mbix)]·4H2O} n (II), have been synthesized hydrothermally using glutarate (Glu2−) mixed with 1,4-bis[(2-methyl-1H-imidazol-1-yl)methyl]benzene (1,4-mbix), and characterized by single-crystal X-ray diffraction, IR and UV–Vis spectroscopy, powder X-ray diffraction, and thermogravimetric and photoluminescence analyses. NiII MOF (I) shows a 4-connected 3D framework with point symbol 66, but is not a typical dia network. ZnII MOF (II) displays a two-dimensional 44-sql network with one-dimensional water chains penetrating the grids along the c direction. The solid-state photoluminescence analysis of (II) was performed at room temperature and the MOF exhibits highly selective sensing toward Fe3+ and Cr2O7 2− ions in aqueous solution.

3D semiconducting Co–MOFs based on 5-(hydroxymethyl)isophthalic acid and imidazole derivatives: syntheses and crystal structures

2020 ◽  
Vol 76 (5) ◽  
pp. 398-404
Author(s):  
Zhong-Xuan Xu ◽  
Chun-Yan Ou ◽  
Chun-Xue Zhang
Keyword(s):  
Metal Organic Frameworks ◽  
Three Dimensional ◽  
Isophthalic Acid ◽  
Donor Ligands ◽  
X Ray Diffraction ◽  
Hydrothermal Conditions ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Structural Differences ◽  
Metal Organic

Two three-dimensional cobalt-based metal–organic frameworks with 5-(hydroxymethyl)isophthalic acid (H2HIPA), namely poly[[μ2-1,4-bis(2-methyl-1H-imidazol-1-yl)benzene-κ2 N 3:N 3′][μ2-5-(hydroxymethyl)isophthalato-κ2 O 1:O 3]cobalt(II)], [Co(C9H6O5)(C14H14N4)] n (1), and poly[tris[μ2-1,4-bis(1H-imidazol-1-yl)benzene-κ2 N 3:N 3′]bis[μ3-5-(hydroxymethyl)isophthalato-κ2 O 1:O 3:O 5]dicobalt(II)], [Co2(C9H6O5)2(C12H10N4)3] n (2), were synthesized under similar hydrothermal conditions. Single-crystal X-ray diffraction analyses revealed that 5-(hydroxymethyl)isophthalate (HIPA2−) and 1,4-bis(2-methyl-1H-imidazol-1-yl)benzene (1,4-BMIB) are simple linkers connecting cobalt centres to build a fourfold interpenetration dia framework in complex 1. However, complex 2 is a pillared-layer framework with a (3,6)-connected network constructed by 1,4-bis(1H-imidazol-1-yl)benzene (1,4-DIB) linkers, 3-connected HIPA2− ligands and 6-connected CoII centres. The above significant structural differences can be ascribed to the introduction of the different auxiliary N-donor ligands. Moreover, UV–Vis spectroscopy and Mott–Schottky measurements confirmed that complexes 1 and 2 are typical n-type semiconductors.

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