A cadmium TCNQ-based semiconductor with versatile binding modes and non-integer redox states
Xuan Zhang1, Zhongyue Zhang, Hanhua Zhao
1Department of Chemistry, Texas A&M University, PO Box 30012, College Station, Texas 77842, USA. dunbar@mail.chem.tamu.edu.
Chemical Communications (Cambridge, England)
|December 19, 2013
Summary
This study introduces a novel 3-D coordination polymer, Cd2(TCNQ)3.5(H2O)2, showcasing unique TCNQ bridging modes. The material demonstrates excellent semiconducting properties, with a room temperature conductivity of 5.8 × 10(-3) S cm(-1).
Area of Science:
- Materials Science
- Solid-State Chemistry
- Crystallography
Background:
- Coordination polymers are advanced materials with diverse applications.
- Tetracyanoquinodimethane (TCNQ) is a versatile organic molecule used in conductive materials.
- Understanding the coordination modes of TCNQ is crucial for designing new functional materials.
Purpose of the Study:
- To synthesize and characterize a novel 3-D coordination polymer containing Cd and TCNQ.
- To investigate the unique coordination behaviors of TCNQ within a crystal network.
- To evaluate the semiconducting properties of the synthesized compound.
Main Methods:
- Single crystal X-ray diffraction for structural determination.
- Electrical conductivity measurements at room temperature.
- Elemental analysis to confirm composition.
Main Results:
- The 3-D coordination polymer Cd2(TCNQ)3.5(H2O)2 was successfully synthesized.
- This compound represents the first instance of simultaneous μ2, μ3, and μ4 bridging modes for TCNQ in a single network.
- Single crystal measurements confirmed the material as a good semiconductor with a room temperature conductivity of 5.8 × 10(-3) S cm(-1).
Conclusions:
- The novel Cd-TCNQ coordination polymer exhibits unprecedented TCNQ coordination diversity.
- The material's semiconducting behavior highlights its potential for electronic applications.
- This work provides insights into the structure-property relationships of TCNQ-based coordination networks.
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