Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11003671 | Optics & Laser Technology | 2019 | 8 Pages |
Abstract
Four chalcone derivatives 3a-3d based on pyrenyl donor and different halopyridyl acceptors were synthesized successfully. The resultant chromophores 3a-3d were characterized by nuclear magnetic resonance (NMR), high resolution mass spectra (HR-MS) and ultraviolet (UV) spectra. The theoretical calculations and thermal properties of the materials 3a-3d were systematically studied to illustrate structure-performance relationship. Further, a novel and unique method, 4f phase coherent imaging technology, was introduced to investigate the third-order nonlinear optical properties of title compounds 3a-3d with 4â¯ns laser pulses at 460â¯nm. The thermal properties, the theoretical calculations and the experimental results consistently indicate that the compound 3b, namely 3-(5-bromopyridin-2-yl)-1-(pyren-1-yl) prop-2-en-1-one, is a more promising candidate for optoelectronic and nonlinear optical devices. Its third-order nonlinear absorption coefficient (β), refraction index (n2) and polarization (Ï(33)) are found to be up to such order of magnitude as 10â9â¯m/W, 10â16â¯m2/W and 10â11â¯esu, respectively.
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Authors
Jinyu Sun, Guilin Wang, Chengqi Liu, Yufang Shi, Minggen Zhao,