Issue 45, 2013

Metal–organic frameworks (MOFs) based on mixed linker systems: structural diversities towards functional materials

Abstract

Coordination polymers are well known organic–inorganic hybrids which can be of different dimensionalities; 1D, 2D and 3D. Based on the geometry of the inorganic metal ions and coordination mode of the organic linkers/clusters the polymers extend to different dimensions and adopt versatile topologies. Frameworks can be built with one linker or more than one linker (mixed linkers) with assembly of different metal ions. Use of a single linker is a well known and accepted methodology to generate high surface area frameworks such as isoreticular metal–organic frameworks (IRMOFs), zeolitic imidazolate frameworks (ZIFs), HKUST and MILs (Material Lavoisier Laboratory). In this context, MOFs composed of mixed linkers provide greater flexibility in terms of surface area, modifiable pore size and chemical environment. In general, one anionic linker and one neutral linker connect with the metal ion/cluster to generate a mixed linker framework. Depending on the binding mode of the anionic linker, the framework extends in different dimensions; a V-shaped anionic linker would not grow in two dimensions, rather a 1D chain will form. The neutral linkers mostly serve as pillars and further increase the dimensionality. Depending on the length of the linkers, porosity can be achieved and systematic control is possible. The extent of entanglement in a 3D framework can also be tuned by altering the neutral or anionic linker. Moreover the linkers can be functionalized extensively to meet the aimed applications such as gas separation, catalysis, magnetism and molecular sensing. Such modulation over functionality and porosity is not possible with a single linker system. In this highlight we aimed to discuss mixed linkers based framework structures, their versatile topologies and tunable porous properties.

Graphical abstract: Metal–organic frameworks (MOFs) based on mixed linker systems: structural diversities towards functional materials

Article information

Article type
Highlight
Submitted
19 Jūl. 2013
Accepted
17 Sept. 2013
First published
18 Sept. 2013

CrystEngComm, 2013,15, 9276-9295

Metal–organic frameworks (MOFs) based on mixed linker systems: structural diversities towards functional materials

R. Haldar and T. K. Maji, CrystEngComm, 2013, 15, 9276 DOI: 10.1039/C3CE41438H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements