Journal
CARBON
Volume 165, Issue -, Pages 461-467Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2020.05.023
Keywords
-
Funding
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [18KJA180005]
Ask authors/readers for more resources
The electronic spectrum and optical nonlinearity of the sp-hybridized cyclo[18]carbon with novel topology are studied by means of (time-dependent) density functional theory calculations. Molecular orbital analysis shows that the energy levels of sigma molecular orbitals of the cyclo[18]carbon are very low, and the energies of two sets of high-lying pi molecular orbitals, which are perpendicular with each other, are almost the same. The simulated absorption spectrum shows that the cyclo[18]carbon exhibits two detectable absorption bands corresponding to pi ->pi* transition: one strong absorption at 219.4 nm and one weak absorption at 191.4 nm. The considerable oscillator strength of the maximum absorption peak has detailedly investigated via theoretical analysis. Accurate calculation of molecular response properties shows that the cyclo[18]carbon has apparent nonlinear anisotropy due to its two-dimensional looping structure. In particular, the cyclo[18]carbon shows a great second-order hyperpolarizability and displays an obvious optical dispersion in optical nonlinearity. Further analysis of hyperpolarizability density reveals the nature of the great nonlinear optical properties of the studied cyclo[18]carbon. (c) 2020 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available