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09:35
Preparation of a Corannulene-functionalized Hexahelicene by Copper(I)-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
Published on: September 18, 2016
Positional Isomers of B6C6N6 Nanorings: Stability, Reactivity, and Optical Properties from First Principles
Xin Chen1,2, Peipei Li1,2, Shusheng Gong1,2
1School of Materials and Chemical Engineering, West Anhui University, Lu'an 237012, China.
Nanomaterials (Basel, Switzerland)
|August 12, 2026
Summary
The arrangement of boron, carbon, and nitrogen atoms in B6C6N6 nanorings impacts their properties. Isomer C1 is most stable, C8 least stable, with varied electronic and optical behaviors influencing potential applications.
Area of Science:
- Computational Chemistry
- Materials Science
- Nanotechnology
Background:
- The arrangement of boron (B), carbon (C), and nitrogen (N) atoms in B6C6N6 cyclic nanorings dictates their fundamental properties.
- Understanding structure-property relationships is crucial for designing novel BCN-based materials.
Purpose of the Study:
- To comparatively investigate the stability, electronic structure, optical response, and reactivity of eight positional isomers of B6C6N6 nanorings.
- To establish a comprehensive structure-property map for B6C6N6 isomers.
Main Methods:
- Density Functional Theory (DFT) and Time-Dependent DFT (TD-DFT) calculations were employed.
- Analysis included relative stability, HOMO-LUMO gaps, aromaticity, UV-Vis absorption spectra, and electrophilic/nucleophilic reactivity.
Main Results:
- Isomer C1 exhibits the highest stability, while C8 is the least stable within 200-1000 K.
- HOMO-LUMO gaps vary significantly (4.40 eV to 8.45 eV), indicating distinct kinetic stabilities; all isomers are nonaromatic.
- Absorption spectra show distinct behaviors: C1 (locally excited) and C3 (charge-transfer) exhibit solvent-dependent shifts (e.g., blue-shift in water). Isomer C7 displays the strongest bifunctional reactivity due to its electrophilic B-B bond.
Conclusions:
- The positional arrangement of BN and CC units critically influences the properties of B6C6N6 nanorings.
- This study provides a structure-property map, guiding the rational design of BCN nanorings for applications in catalysis, molecular recognition, and optoelectronics.
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