应用化学 ›› 2022, Vol. 39 ›› Issue (7): 1138-1146.DOI: 10.19894/j.issn.1000-0518.210346

• 研究论文 • 上一篇    下一篇

三联噻吩基查尔酮衍生物的线性光学性质和超快非线性光学响应

尹爱萍(), 孙金鱼, 石玉芳, 王迎进, 赵明根   

  1. 忻州师范学院化学系,山西省材料与计算化学重点实验室,忻州 034000
  • 收稿日期:2021-07-19 接受日期:2021-12-13 出版日期:2022-07-01 发布日期:2022-07-11
  • 通讯作者: 尹爱萍
  • 基金资助:
    山西省“1331工程”优势特色学科《化学》(2018122)

Linear Optical Properties and Ultrafast Nonlinear Optical Response of Trithiophenyl Chalcone Derivatives

Ai-Ping YIN(), Jin-Yu SUN, Yu-Fang SHI, Ying-Jin WANG, Ming-Gen ZHAO   

  1. Key Laboratory of Materials and Computational Chemistry,Department of Chemistry,Xinzhou Teachers University,Xinzhou 034000,China
  • Received:2021-07-19 Accepted:2021-12-13 Published:2022-07-01 Online:2022-07-11
  • Contact: Ai-Ping YIN
  • About author:aipingyin1964@163.com
  • Supported by:
    the Fund for Shanxi “1331 Project” Key Subjects Construction(2018122)

摘要:

α-三联噻吩甲醛为原料,与3种二氯苯乙酮发生Claisen-Schmidt缩合反应,合成了3种含有三联噻吩基的查尔酮衍生物:1-(α-三联噻吩-2-基)-3-(2,4-二氯苯基)丙烯酮(a)、1-(2,5-二氯苯基)-3-(α-三联噻吩-2-基)丙烯酮(b)和1-(3,4-二氯苯基)-3-(α-三联噻吩-2-基)丙烯酮(c)。借助核磁共振波谱仪(1H NMR、13C NMR)和液-质联用谱仪(LC-MS)对其结构进行了表征;采用Z-扫描技术(600 nm,180 fs)测定了3个化合物的非线性光学吸收性能;运用含时密度泛函理论(TD-DFT)方法计算了它们的极化率(α0)、静态第一超极化率(β0)、振子强度(f0)、跃迁能(ΔE)、基态和最主要激发态之间的偶极矩差(Δμ)、最主要激发态的主要组成、最高占据分子轨道(HOMO)和最低空分子轨道(LUMO)之间的能隙,同时测定了它们的线性光学性质。结果表明,化合物c的紫外吸收波长、荧光发射波长、热稳定性、极化率均最大;化合物ac均存在分子内电荷转移现象,非线性吸收均为双光子吸收,化合物ab还有五阶非线性吸收,它们均表现出超快非线性光学响应,可作非线性光学研究备选材料。

关键词: 三联噻吩基查尔酮衍生物, Z-扫描技术, 理论计算, 超快非线性光学响应

Abstract:

Three chalcone derivatives with tri-thiophene groups, 1-(α-tri-thiophene-2-yl)-3-(2, 4-dichlo-rophenyl) acry lone (a), 1-(2, 5-dichlorophenyl)-3-(α-tri-thiophene-2-yl) acrylone (b) and 1-(3, 4-dich-lorophenyl)-3-(α-tri-thiophene-2-yl) acrylone (c) were synthesized by Claisen-Schmidt condensation reaction using α-tri-thiophene formaldehyde and three dichloroacetophenone as raw materials. The structures of derivatives were characterized by 1H NMR and 13C NMR spectroscopy and LC-MS. Their nonlinear optical absorption properties were investigated by using Z-scan technique (600 nm, 180 fs). Their polarizability, first hyperpolarizability, oscillator strength, transition energy, difference of dipole moment between ground state and excited state, main compositions of crucial transition state and the gap between HOMO and LUMO of ac were calculated by time-dependent density functional theory approach. At the same time, their linear optical properties were measured. The results indicate that the derivative c has the highest ultraviolet absorption wavelength and fluorescence emission wavelength, best thermal stability and the highest polarizability. The intramolecular charge transfer can occur within three compounds ab and c. Also, the nonlinear absorption is two-photon absorption, and both a and b show fifth-order nonlinear absorption. They exhibit ultrafast third-order nonlinear optical response, indicating that they are excellent candidate materials for nonlinear optics research.

Key words: Tri-thiophenyl chalcone derivatives, Z-scan technology, Theoretical calculation, Ultrafast nonlinear optical response

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