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09:34
Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
Published on: February 6, 2020
Two unprecedented NLO-active coordination polymers constructed by a semi-rigid tetrahedral linker
Li-Li Liang1, Shi-Bin Ren, Jun Zhang
1State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China.
Dalton Transactions (Cambridge, England : 2003)
|July 24, 2010
Summary
Researchers synthesized novel noncentrosymmetric coordination polymers using tetrakis[4-(carboxyphenyl)oxamethyl]methane acid (H(4)L) with zinc and cadmium salts. These materials exhibit unique network topologies and nonlinear optical (NLO) activity.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Crystallography
Background:
- Coordination polymers offer tunable structures and properties.
- Noncentrosymmetric materials are crucial for nonlinear optical (NLO) applications.
- Developing novel network topologies with specific functionalities is an active research area.
Purpose of the Study:
- To synthesize and characterize new noncentrosymmetric coordination polymers.
- To investigate the structural diversity and NLO activity of metal-organic assemblies.
- To explore novel interpenetrating network topologies.
Main Methods:
- Solvothermal synthesis using tetrakis[4-(carboxyphenyl)oxamethyl]methane acid (H(4)L) with ZnCl(2) and CdBr(2).
- Single-crystal X-ray diffraction for structural determination.
- Characterization of nonlinear optical (NLO) properties.
Main Results:
- Two noncentrosymmetric, NLO-active coordination polymers were successfully synthesized: [Zn(4)(L(2))(H(2)O)(3)(DMA)].2H(2)O (1) and [Cd(2)L(DMA)(2)(H(2)O)(2)] (2).
- Compound 1 exhibits an unprecedented 2-fold interpenetrating sxa topology and ferroelectric properties.
- Compound 2 features a 7-fold interpenetrating dia network.
Conclusions:
- The study demonstrates the successful construction of complex coordination polymer architectures with NLO activity.
- The synthesized materials showcase diverse network topologies, including novel interpenetrating frameworks.
- These findings contribute to the development of advanced functional materials for NLO applications.
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