Related Experiment Video
Updated: May 10, 2026
07:20
Discovery and Synthesis Optimization of Isoreticular Al(III) Phosphonate-Based Metal-Organic Framework Compounds Using High-Throughput Methods
Published on: October 6, 2023
Structural isomerism leading to variable proton conductivity in indium(III) isophthalic acid based frameworks
Tamas Panda1, Tanay Kundu, Rahul Banerjee
1Physical/Materials Chemistry Division, CSIR National Chemical Laboratory, Dr Homi Bhabha Road, Pune 411008, India.
Chemical Communications (Cambridge, England)
|June 5, 2013
Summary
Two isomeric Indium(III)-isophthalate based metal-organic frameworks (MOFs) were investigated for proton conductivity. One MOF exhibited significant proton conductivity under humid conditions, while the other showed conductivity in both humid and anhydrous environments.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Nanotechnology
Background:
- Proton conductivity in metal-organic frameworks (MOFs) is crucial for energy applications.
- Isomeric structures can exhibit distinct properties, influencing conductivity pathways.
- Understanding structure-property relationships in MOFs is key for developing advanced materials.
Purpose of the Study:
- To investigate and compare the proton conductivity of two isomeric Indium(III)-isophthalate based MOFs.
- To evaluate the influence of isomeric structure on proton transport mechanisms.
- To determine the performance of these MOFs under varying humidity conditions.
Main Methods:
- Synthesis of two isomeric In(III)-isophthalate based MOFs.
- Characterization of MOF structures and properties.
- Proton conductivity measurements under controlled humidity (98% RH) and anhydrous conditions.
Main Results:
- In-IA-2D-1 demonstrated a proton conductivity of 3.4 × 10(-3) S cm(-1) under 98% relative humidity (RH).
- In-IA-2D-2 exhibited proton conductivity of 2.6 × 10(-5) S cm(-1) under both humidified and anhydrous conditions.
- The isomeric difference significantly impacts proton conduction capabilities and environmental dependency.
Conclusions:
- The studied isomeric MOFs possess distinct proton conductivity characteristics.
- In-IA-2D-1 shows promise for applications requiring high proton conductivity in humid environments.
- In-IA-2D-2 offers potential for applications demanding stable proton conduction across a wider range of humidity levels.
Related Concept Videos
02:34Structural Isomerism
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
02:52Stereoisomerism
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
02:43Isomerism
Isomers are molecules with the same molecular formula but different structural arrangements. Isomers can be further classified into constitutional isomers and stereoisomers. Constitutional isomers differ in the connectivity of their constituent atoms. For example, 2-butanol and diethyl ether are constitutional isomers, as they have the same chemical formula, C4H10O, but differ in the connectivity of the carbon and oxygen atoms. Constitutional isomers have different physical and chemical...
01:26Polymer Classification: Stereospecificity
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
02:42Ionic Crystal Structures
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
02:42Valence Bond Theory
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...