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Updated: Oct 3, 2025
12:02
Determination of Thermodynamic Properties of Alkaline Earth-liquid Metal Alloys Using the Electromotive Force Technique
Published on: November 3, 2017
13.3K
Can a molecular switch exist in both superalkali electride and superalkalide forms?
Xiu-Guang Yi1, Yin-Feng Wang1, Hua-Rong Zhang2
1Jiangxi Province Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Jinggangshan University, Ji'an, Jiangxi 343009, P. R. China. cyclont@yeah.net.
Physical Chemistry Chemical Physics : PCCP
|February 21, 2022
Summary
Researchers developed a molecular switch combining electride and alkalide properties using phenalenyl radical and M3 ring structures. These molecules can switch between superalkali electride and superalkalide states using light or electric fields.
Area of Science:
- Computational Chemistry
- Materials Science
- Molecular Switches
Background:
- Electrides and alkalides are ionic compounds with unique electronic properties.
- Molecular switches are crucial for developing advanced electronic devices.
- Combining electride and alkalide characteristics in a single molecule presents a novel challenge.
Purpose of the Study:
- To design and investigate a molecular system exhibiting both electride and alkalide properties.
- To explore the potential of phenalenyl radical and M3 ring (M = Li, Na, K) structures for molecular switching.
- To analyze the switching mechanisms induced by light and external electric fields.
Main Methods:
- Theoretical calculations were employed to study the electronic structure and properties of proposed molecular systems.
- Investigated parallel (superalkali electride) and vertical (superalkalide) geometries of M3-PHY complexes.
- Analyzed isomerization pathways triggered by different wavelengths of light and external electric fields.
Main Results:
- Identified phenalenyl radical and M3 ring (M = Li, Na, K) stacked structures as viable candidates for molecular switches.
- Demonstrated that superalkalide M-M2(1-)-PHY- can isomerize to superalkali electride e-⋯M3+-PHY- using long-wavelength irradiation and vice versa with short-wavelength irradiation.
- Confirmed that external electric fields can also induce the transition between superalkalide and superalkali electride states.
Conclusions:
- The proposed M3-PHY systems effectively combine electride and alkalide characteristics, functioning as molecular switches.
- Light irradiation and external electric fields provide tunable control over the switching between states.
- The study also examined differences in static and dynamic first hyperpolarizability (β0) values, relevant for nonlinear optical applications.
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