scholarly journals Metal-organic framework based on hinged cube tessellation as transformable mechanical metamaterial

2019 ◽  
Vol 5 (5) ◽  
pp. eaav4119 ◽  
Author(s):  
Eunji Jin ◽  
In Seong Lee ◽  
Dongwook Kim ◽  
Hosoowi Lee ◽  
Woo-Dong Jang ◽  
...  
Keyword(s):  
Rational Design ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Building Blocks ◽  
Three Dimensional Printing ◽  
Detailed Structural Analysis ◽  
Mechanical Metamaterials ◽  
Metal Organic ◽  
New Type ◽  
Organic Framework

Mechanical metamaterials exhibit unusual properties, such as negative Poisson’s ratio, which are difficult to achieve in conventional materials. Rational design of mechanical metamaterials at the microscale is becoming popular partly because of the advance in three-dimensional printing technologies. However, incorporating movable building blocks inside solids, thereby enabling us to manipulate mechanical movement at the molecular scale, has been a difficult task. Here, we report a metal-organic framework, self-assembled from a porphyrin linker and a new type of Zn-based secondary building unit, serving as a joint in a hinged cube tessellation. Detailed structural analysis and theoretical calculation show that this material is a mechanical metamaterial exhibiting auxetic behavior. This work demonstrates that the topology of the framework and flexible hinges inside the structure are intimately related to the mechanical properties of the material, providing a guideline for the rational design of mechanically responsive metal-organic frameworks.

scholarly journals Ternary MOF-on-MOF heterostructures with controllable architectural and compositional complexity via multiple selective assembly

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Chao Liu ◽  
Qiang Sun ◽  
Lina Lin ◽  
Jing Wang ◽  
Chaoqi Zhang ◽  
...  
Keyword(s):  
Rational Design ◽  
Materials Science ◽  
Metal Organic Framework ◽  
Building Blocks ◽  
Selective Assembly ◽  
Assembly Strategy ◽  
Metal Organic ◽  
Site Selective ◽  
Organic Framework ◽  
The Way

Abstract Assembly of different metal-organic framework (MOF) building blocks into hybrid MOF-on-MOF heterostructures is promising in chemistry and materials science, however the development of ternary MOF-on-MOF heterostructures with controllable architectural and compositional complexity is challenging. Here we report the synthesis of three types of ternary MOF-on-MOF heterostructures via a multiple selective assembly strategy. This strategy relies on the choice of one host MOF with more than one facet that can arrange the growth of a guest MOF, where the arrangement is site-selective without homogenous growth of guest MOF or homogenous coating of guest on host MOF. The growth of guest MOF on a selected site of host MOF in each step provides the opportunity to further vary the combinations of arrangements in multiple steps, leading to ternary MOF-on-MOF heterostructures with tunable complexity. The developed strategy paves the way towards the rational design of intricate and unprecedented MOF-based superstructures for various applications.

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.

An Adeninate-Based Metal–Organic Framework for Antitumour Drug Delivery and Anti-Osteogenic Sarcoma Activity Evolution

2018 ◽  
Vol 71 (12) ◽  
pp. 978
Author(s):  
Bing Yan ◽  
Huanqiu Li ◽  
Wenyan Jiang ◽  
Long Mu
Keyword(s):  
Drug Delivery ◽  
Ph Value ◽  
Antitumour Activity ◽  
Metal Organic Framework ◽  
Osteogenic Sarcoma ◽  
Three Dimensional ◽  
Building Blocks ◽  
Therapy Effect ◽  
Metal Organic ◽  
Organic Framework

Targeted anticancer drug delivery systems (DDSs) have been considered as one of the most important approaches for reducing the side effects and enhancing the therapy effect in cancer treatment. This work presents a targeted anticancer DDS on the basis of a newly synthesised adeninate-based metal–organic framework (MOF) [Zn2(ad)2(AMDB)(H2O)](DMF)3 (1) with biomolecular adenine (HAd), zinc(ii) ions, and 4,4′-(aminomethylene)dibenzoic acid (H2AMDB) as the molecular building blocks. The structural analysis via X-ray diffraction technology shows MOF 1 is a channel-type three-dimensional network composed of rod-like Zn–Ad chains. Due to its large inner free spaces and uncoordinated N donor sites functionalised pore surroundings, the antitumour molecule 5-fluorouracil (5-Fu) could be loaded into the pores of 1a (activated 1) though an adsorption process, which shows a moderate high storage capacity of 32 wt-%. At the same time, the pH-dependent delivery of 5-Fu could be achieved in phosphate-buffered saline (PBS) solution. With a lower pH value, the drug release will be enhanced. Furthermore, the invitro antitumour activity of the drug/1a composite has been probed via 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay on two human osteogenic sarcoma cells (MG63 and U2OS).

Three-dimensional metal-organic framework based on pentanuclear manganese clusters as building blocks

2016 ◽  
Vol 69 (11-13) ◽  
pp. 1792-1801 ◽  
Author(s):  
Xin-Xiong Li ◽  
Kun-Yu Wei ◽  
Ting-Ting Zhuang ◽  
Wei Xia ◽  
Jing-Yu Chen ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Three Dimensional ◽  
Building Blocks ◽  
Manganese Clusters ◽  
Metal Organic ◽  
Organic Framework

Three-dimensional hierarchical C-Co-N/Se derived from metal-organic framework as superior cathode for Li-Se batteries

2017 ◽  
Vol 363 ◽  
pp. 103-109 ◽  
Author(s):  
Jiarui He ◽  
Weiqiang Lv ◽  
Yuanfu Chen ◽  
Jie Xiong ◽  
Kechun Wen ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Three Dimensional ◽  
Metal Organic ◽  
Organic Framework

A three-dimensional porous metal–organic framework of unusual rob topology based on a novel fluorinated bis(imidazole) ligand

2011 ◽  
Vol 14 (11) ◽  
pp. 1819-1822 ◽  
Author(s):  
Zhi-Hui Zhang ◽  
Sheng-Chun Chen ◽  
Qun Chen ◽  
Ming-Yang He ◽  
Huan Xu
Keyword(s):  
Metal Organic Framework ◽  
Three Dimensional ◽  
Porous Metal ◽  
Imidazole Ligand ◽  
Metal Organic ◽  
Organic Framework
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