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Isomerism in double-pillared-layer coordination polymers - structures and photoreactivity.
In-Hyeok Park1, Huiyeong Ju2, Kihwan Kim2
1Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore.
Two isomeric coordination polymers with zinc(II) exhibit distinct pore structures and photoreactivity due to varied carboxylate bonding. This highlights how subtle structural changes impact material properties and reactivity.
Area of Science:
- Coordination polymers
- Materials science
- Crystallography
Background:
- Isomerism in coordination polymers provides insights into structure-property relationships.
- Understanding isomerism is key to designing functional materials.
Purpose of the Study:
- To report the isolation of two isomeric double-pillared-layer coordination polymers.
- To investigate the impact of different carboxylate bonding modes on structural and chemical properties.
Main Methods:
- Synthesis of zinc(II)-based coordination polymers.
- Structural characterization of isomeric compounds.
- Photoreactivity studies, including cyclo-addition reactions.
Main Results:
- Two isomeric structures were isolated, differing in benzene-1,4-dicarboxylate ligand bonding to zinc(II).
- The isomers exhibit variations in pore dimensions, interpenetration, and photoreactivity.
- One isomer underwent a double [2+2] cyclo-addition, while the other showed incomplete cyclo-addition.
Conclusions:
- A new type of structural isomerism in coordination polymers was identified.
- Different ligand bonding modes significantly influence pore characteristics and photoreactivity.
- Structural connectivity is crucial for tuning the properties of coordination polymeric materials.
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