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Metalloid-Organic Intermolecular Complexes with Charge State-Controlled Conformations
1Faculty of Science, Ontario Tech University/UOIT, Oshawa, ON L1G 0C5, Canada.
Molecules (Basel, Switzerland)
|April 13, 2024
Summary
Molecular systems with boron atoms change shape when charged or discharged, enabling potential use as molecular switches. Their distinct infrared spectra allow for experimental tracking of these transformations.
Area of Science:
- Computational chemistry
- Materials science
- Molecular electronics
Background:
- Molecular systems can exhibit shape changes upon charging/discharging, offering potential for novel electronic and mechanical functions.
- Main-group metalloids, like boron, can form complexes with hydrocarbons, leading to interesting structural and electronic properties.
Purpose of the Study:
- To investigate the structural, stability, and electronic properties of boron-hydrocarbon complexes.
- To explore the potential of these systems as molecular switches by analyzing their conformational changes upon ionization.
- To predict infrared (IR) spectra for experimental identification and monitoring.
Main Methods:
- Density Functional Theory (DFT) calculations were employed to determine molecular structures, stabilities, and charge distributions.
- Analysis of conformational landscapes, including typical twisting angles between neutral and ionic states.
- Simulation of infrared spectra to correlate with structural changes.
Main Results:
- Significant geometry variations were observed between neutral and ionic states of boron-hydrocarbon complexes, with up to 90-degree twists.
- Two to three distinct conformations were identified for the studied systems.
- Predicted IR spectra show unique signatures corresponding to different conformations, facilitating experimental identification.
Conclusions:
- Boron-hydrocarbon complexes exhibit significant, charge-dependent shape alterations.
- These systems demonstrate potential for use as molecular switches.
- The predicted IR spectra provide a viable method for experimental tracking of their functional states.
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