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Heterobimetallic Lantern Complexes and Their Novel Structural and Magnetic Properties
Stephanie A Beach1, Linda H Doerrer1
1Department of Chemistry , Boston University , Boston , Massachusetts 02215 , United States.
Accounts of Chemical Research
|April 14, 2018
Summary
Researchers developed new molecular building blocks for nanoscale electronics and data storage. These novel compounds exhibit unique magnetic properties, including long-range antiferromagnetic coupling and ferromagnetic interactions in extended chains.
Area of Science:
- Materials Science
- Nanotechnology
- Solid-State Chemistry
Background:
- Approaching the atomic limit in microelectronics necessitates research into molecular-based wires and magnets.
- Quasi-1D compounds are explored for electronic conductivity and magnetic properties in nanoscale devices.
- A bottom-up approach is employed to create tailored molecular systems with enhanced properties.
Purpose of the Study:
- To develop improved electronic structure and magnetic properties of quasi-1D arrays using a building-block strategy.
- To synthesize and characterize novel asymmetric lantern complexes of the form [PtM(SOCR)4(L)].
- To investigate the assembly of these complexes into various solid-state structures and their magnetic phenomena.
Main Methods:
- Utilized monothiocarboxylate ligands and hard-soft Lewis acid-base principles to synthesize new lantern complexes.
- Prepared complexes with various 3d metals (M) and substituted thiocarboxylate ligands (R = Ph, CH3).
- Employed crystallographic characterization to analyze solid-state arrangements and structural motifs.
- Investigated magnetic properties, including coupling interactions and spin states.
Main Results:
- Synthesized dozens of new [PtM(SOCR)4(L)] lantern complexes, leading to diverse intermolecular arrangements.
- Observed three novel magnetic phenomena: long-range antiferromagnetic coupling (>8 Å), ferromagnetic coupling in [PtCr(tba)4(NCS)]∞, and weak antiferromagnetic coupling in [Ni2(SOCR)4(L)]∞ chains.
- Characterized four distinct categories of solid-state dimerization based on Pt···Pt and Pt···S interactions.
Conclusions:
- The versatility of the lantern motif allows for the construction of diverse quasi-1D molecular systems.
- The synthesized compounds exhibit unique magnetic behaviors with potential applications in molecular electronics and data storage.
- The hard-soft Lewis acid-base approach provides a powerful route to novel functional molecular materials.
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