Fused ring effect on optical nonlinearity and structure property relationship of anthracenyl chalcone based push-pull chromophores.

Autor: Zainuri DA; X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, Penang, Malaysia., Abdullah M; Institute of Nano Optoelectronics Research and Technology (INOR), Universiti Sains Malaysia, Penang, Malaysia., Zaini MF; X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, Penang, Malaysia., Bakhtiar H; Department of Physics, Faculty of Sciences, Universiti Teknologi Malaysia, Johor Bahru, Johor, Malaysia., Arshad S; X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, Penang, Malaysia., Abdul Razak I; X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, Penang, Malaysia.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2021 Sep 28; Vol. 16 (9), pp. e0257808. Date of Electronic Publication: 2021 Sep 28 (Print Publication: 2021).
DOI: 10.1371/journal.pone.0257808
Abstrakt: The Ultraviolet-visible (UV-Vis) spectra indicate that anthracenyl chalcones (ACs) have high maximum wavelengths and good transparency windows for optical applications and are suitable for optoelectronic applications owing to their HOMO-LUMO energy gaps (2.93 and 2.76 eV). Different donor substituents on the AC affect their dipole moments and nonlinear optical (NLO) responses. The positive, negative, and neutral electrostatic potential regions of the molecules were identified using molecular electrostatic potential (MEP). The stability of the molecule on account of hyperconjugative interactions and accompanying charge delocalization was analyzed using natural bond orbital (NBO) analysis. Open and closed aperture Z-scans were performed using a continuous-wave frequency-doubled diode-pumped solid-state (DPSS) laser to measure the nonlinear absorption and nonlinear refractive index coefficients, respectively. The valley-to-peak profile of AC indicated a negative nonlinear refractive index coefficient. The obtained single crystals possess reverse saturation absorption due to excited-state absorption. The structural and nonlinear optical properties of the molecules have been discussed, along with the role of anthracene substitution for enhancing the nonlinear optical properties. The calculated third-order susceptibility value was 1.10 x10-4 esu at an intensity of 4.1 kW/cm2, higher than the reported values for related chalcone derivatives. The NLO response for both ACs offers excellent potential in optical switching and limiting applications.
Competing Interests: The authors have declared that no competing interests exist.
Databáze: MEDLINE
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