Tan Zheng, Li Yan, Wu Xin, Zhang Ziying, Shi Weimei, Yang Shiqing, Zhang Wanli
State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China Chengdu 610054 P. R. China.
Chengdu Polytechnic 83 Tianyi Street Chengdu 610000 P. R. China
RSC Adv. 2023 Jan 4;13(2):1031-1040. doi: 10.1039/d2ra07008a. eCollection 2023 Jan 3.
The development of AI for fluorescent materials design is technologically demanding due to the issue of accurately forecasting fluorescent properties. Besides the huge efforts made in predicting the photoluminescent properties of organic dyes in terms of machine learning techniques, this article aims to introduce an adversarial generation paradigm for the rational design of fluorescent molecules. Molecular SMILES is employed as the input of a GRU based autoencoder, where the encoding and decoding of the string information are processed. A generative adversarial network is applied on the latent space with a generator to generate samples to mimic the latent space, and a discriminator to distinguish samples from the latent space. It is found that the excited state property distributions of generated molecules fully match those of the original samples, with the molecular synthesizability being accessible as well. Further screening of the generated samples delivers a remarkable luminescence efficiency of molecules epitomized by the significant oscillator strength and charge transfer characteristics, demonstrating the great potential of the adversarial model in enriching the fluorescent library.
由于准确预测荧光特性的问题,用于荧光材料设计的人工智能开发在技术上要求很高。除了在机器学习技术方面为预测有机染料的光致发光特性付出了巨大努力之外,本文旨在引入一种用于合理设计荧光分子的对抗生成范式。分子SMILES被用作基于门控循环单元(GRU)的自动编码器的输入,在此对字符串信息进行编码和解码。在潜在空间上应用生成对抗网络,其中生成器用于生成样本以模拟潜在空间,判别器用于区分来自潜在空间的样本。研究发现,生成分子的激发态特性分布与原始样本的分布完全匹配,分子的合成可行性也可实现。对生成样本的进一步筛选显示出分子具有显著的发光效率,以显著的振子强度和电荷转移特性为代表,证明了对抗模型在丰富荧光库方面的巨大潜力。