靛红双氮二苯腙分子开关的光致异构化机理

庞晓娟; 赵凯玥; 何航宇; 张宁波; 蒋臣威

doi:10.7498/aps.73.20240461

摘要

腙类分子开关在超分子化学领域有非常重要的应用价值, 基于靛红发色团发展出的新型腙类分子开关已被合成. 因其具有可见光激发下的顺反异构化特征、衍生物的易合成性及对外界刺激的敏感性, 其在生物化学领域具有重要的应用价值. 然而, 该新型分子开关的光致异构化机制尚不明确, 异构过程是否存在新奇的现象也不得而知. 本文采用基于半经验OM2/MRCI的轨迹面跳跃动力学方法, 系统地研究了一种名为靛红双氮二苯腙分子开关E-Z异构化过程的光致异构化机理. 研究发现该E构型分子开关的S₁激发态平均寿命约为 107 fs, 该分子开关的E-Z异构化量子产率为16.01%. 通过对该分子开关光致异构化过程的计算, 明确了两种不同分子开关异构化机制; 除围绕C=N键旋转的传统分子开关异构机制之外, 阐明了新的异构机制——分子开关转子部分面对面的扭转; 通过时间分辨的荧光辐射谱的计算, 预测了异构化过程中存在极快的荧光猝灭现象, 并且伴随着荧光红移的发生; 通过对计算得到的荧光光谱与激发态平均寿命的分析, 提出了“暗态”的存在, 并对“暗态”存在的原因给出了可能的解释. 研究结果可为新型分子开关的设计及应用提供理论指导作用.

关键词:

Abstract

Hydrazone molecular switches have significant application value in supramolecular chemistry. A new type of hydrazone molecular switch, named isatin N²-diphenylhydrazone, has been synthesized. Owing to its cis-trans isomerization characteristics under visible light excitation, ease of synthesizing of derivatives, and sensitivity to external stimuli, it has important application value in the field of biochemistry. Because of its forward and backward visible light excitation characteristics, it is considered a class of compound that is very suitable for molecular switches, and it has a wide application value in fields such as biotechnology. In addition, the derivatives compound exhibits strong interactions with negative ions, which enhances its function as a molecular switch, making it a four-state molecular switch that can be achieved by a single molecule. However, the photo-induced isomerization mechanism of these new molecular switches is not yet clear, and whether there are novel phenomena in the isomerization process is also unknown. In this work, a semi empirical OM2/MRCI based trajectory surface hopping dynamics method is adopted to systematically study a photo induced isomerization mechanism based on the E-Z isomerization process of the isatin N²-diphenylhydrazones molecular switch. Optimization configuration and the average lifetime of the first excited S₁ state are obtained by using the semi-empirical OM2/MRCI method of molecular switch. It is found that the average lifetime of the S₁ excited state of the E-configuration molecular switch is about 107 fs, and the quantum yield of E-Z isomerization of the molecular switch is 16.01%. By calculating the photo induced isomerization process of the molecular switch, two different isomerization mechanisms of the molecular switch are identified. In addition to the traditional molecular switch isomerization mechanism revolving around the C=N bond, a new isomerization mechanism, i.e. the face-to-face twisting of the molecular switch rotor part is elucidated. By calculating the time-resolved fluorescence radiation spectrum, it is predicted that there may be a very fast fluorescence quenching phenomenon occurring in about 75 fs in the isomerization process, slightly faster than the S₁ average decay events (107 fs). The information about wavelength-resolved attenuation at different times is also calculated, which reflects the ultrafast fluorescence quenching process accompanied by fluorescence red shift, ranging from 2.1 × 10⁴ cm^–1 to 3.4 × 10⁴ cm^–1. By comparing the calculated fluorescence spectra with the average lifetime of excited states, the existence of “dark states” is proposed, and possible explanations for the existence of “dark states” are provided, and those “dark states” may be related to lower quantum yields. The research results can provide theoretical guidance for the design and application of new molecular switches. The ease of synthesis and sensitivity to external stimuli of its derivatives make those compounds extremely valuable in molecular switching and light measurement applications.

Keywords:

作者及机构信息

1.
中国矿业大学材料与物理学院, 徐州　221116

2.
中国矿业大学矿业工程学院, 徐州　221116

3.
西安交通大学物理学院, 凝聚态物质非平衡合成与调制教育部重点实验室, 量子信息与量子光电器件陕西省重点实验室, 西安　710049

通信作者: 赵凯玥, ts22180023a31@cumt.edu.cn

基金项目: 国家自然科学基金(批准号: 12204532, 52174137)、江苏省自然科学基金(批准号: BK20200648)、中国矿业大学重点学科基金(批准号: 2022WLXK16)、中国矿业大学科研启动基金(批准号: 102519047)和中国矿业大学研究生创新计划(批准号: 2024WLJCRCZL284)资助的课题.

Authors and contacts

1.
School of Materials and Physics, China University of Mining & Technology, Xuzhou 221116, China

2.
School of Mines, China University of Mining & Technology, Xuzhou 221116, China

3.
Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi’an Jiaotong University, Xi’an 710049, China

Corresponding author: Zhao Kai-Yue, ts22180023a31@cumt.edu.cn

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 12204532, 52174137), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20200648), the Key Academic Project of China University of Mining and Technology (Grant No. 2022WLXK16), the Research Start-up Funding of China University of Mining and Technology (Grant No. 102519047), and the Graduate Innovation Project of China University of Mining and Technology (Grant No. 2024WLJCRCZL284).

文章全文 : translate this paragraph

参考文献

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施引文献

图 1 新型分子开关E-Z异构机制图, 最优基态反应物　(a) E及产物(b) Z的S₀最优构型图, 所有相关原子序号均已标注

Fig. 1. E-Z isomerization mechanism diagram of a novel molecular switch, the optimal configuration diagram of S₀ for the optimal ground state reactant (a) E and product (b) Z, with all relevant atomic numbers marked.

下载: 全尺寸图片幻灯片

图 2 新型分子开关半经验 OM2/MRCI方法下优化的第一激发态S₁最优构型

Fig. 2. Optimization of the optimal configuration of the first excited state S₁ under the semi-empirical OM2/MRCI method of the novel molecular switch.

下载: 全尺寸图片幻灯片

图 3 电子在基态S₀和第一激发态S₁的态平均占据数随时间变化情况

Fig. 3. The average occupancy of electrons in the ground state S₀ and the first excited state S₁ over time.

下载: 全尺寸图片幻灯片

图 4 新型分子开关异构化过程中的键长的变化趋势图　(a), (b)扭转过程中C8—N17 与C2—C8, N17—N16的变化趋势; (c), (d)旋转过程中C8—N17 与C2—C8, N17—N16变化趋势

Fig. 4. Trend chart of bond length changes during the isomerization process of the novel molecular switch: (a), (b) The changing trends of C8—N17 and C2—C8, N17—N16 during the twisting process; (c), (d) changes in C8—N17 and C2—C8, N17—N16 during rotation.

下载: 全尺寸图片幻灯片

图 5 新型分子开关异构化过程中的二面角的变化趋势　(a), (b)扭转过程中C2—C8—N17—N16, C7—C8—N17—N16与C8—N17—N16—C33, C8—N17—N16—C18的变化趋势; (c), (d)旋转过程中C2—C8—N17—N16, C7—C8—N17—N16与C8—N17—N16—C33, C8—N17—N16—C18的变化趋势

Fig. 5. The changing trend of dihedral angle during the isomerization process of the novel molecular switch: (a), (b) The changing trends of C2—C8—N17—N16, C7—C8—N17—N16, C8—N17—N16—C33, and C8—N17—N16—C18 during the twisting process; (c), (d) the changing trends of C2—C8—N17—N16, C7—C8—N17—N16, C8—N17—N16—C33, and C8—N17—N16—C18 during the rotation process.

下载: 全尺寸图片幻灯片

图 6 激发态动力学的含时荧光辐射光谱　(a)随时间变化荧光辐射光谱; (b)不同时间下随波长变化的衰减信息

Fig. 6. Time-dependent fluorescence emission spectra of excited state dynamics: (a) The time-resolved deconvoluted emission spectrum; (b) the wavelength-resolved decay information in different time.

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

[1]	Li R J, Mou B Z, Yamada M, Li W, Nakashima T, Kawai T 2024 Molecules 29 25 Google Scholar
[2]	Jago D, Gaschk E E, Koutsantonis G A 2023 Aust. J. Chem. 76 635 Google Scholar
[3]	Yu Z, Hecht S 2016 Chem. Commun. 52 6639 Google Scholar
[4]	Feringa B L, Van Delden R A, Koumura N, Geertsema E M 2000 Chem. Rev. 100 1789 Google Scholar
[5]	Rice A M, Martin C R, Galitskiy V A, Berseneva A A, Leith G A, Shustova N B 2020 Chem. Rev. 120 8790 Google Scholar
[6]	Zhang X Y, Hou L L, Samorì P 2016 Nat. Commun. 7 11118 Google Scholar
[7]	Alenazi M H, Mubarak A T, Abboud M 2024 Nanotechnol. Rev. 13 20240032 Google Scholar
[8]	Goulet-Hanssens A, Eisenreich F, Hecht S 2020 Adv. Mater. 32 1905966 Google Scholar
[9]	Pios S V, Gelin M F, Ullah A, Dral P O, Chen L 2024 J. Phys. Chem. Lett. 15 2325 Google Scholar
[10]	Conti I, Cerullo G, Nenov A, Garavelli M 2020 J. Am. Chem. Soc. 142 16117 Google Scholar
[11]	Towns A 2021 Phys. Sci. Rev. 6 477 Google Scholar
[12]	Cheng H B, Zhang S, Bai E, Cao X, Wang J, Qi J, Liu J, Zhao J, Zhang L, Yoon J 2022 Adv. Mater. 34 2108289 Google Scholar
[13]	Bertarelli C, Bianco A, Castagna R, Pariani G 2011 J. Photoch. Photobio. C 12 106 Google Scholar
[14]	Bléger D, Hecht S 2015 Angew. Chem. Int. Ed. 54 11338 Google Scholar
[15]	Shao B, Aprahamian I 2020 Chem 6 2162 Google Scholar
[16]	Van Dijken D J, KovaříčEk P, Ihrig S P, Hecht S 2015 J. Am. Chem. Soc. 137 14982 Google Scholar
[17]	Schnetz M, Meier J K, Rehwald C, Mertens C, Urbschat A, Tomat E, Akam E A, Baer P, Roos F C, Brüne B 2020 Cancers 12 530 Google Scholar
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[21]	Vantomme G, Jiang S M, Lehn J M 2015 J. Am. Chem. Soc. 137 3138 Google Scholar
[22]	Su X, Aprahamian I 2014 Chem. Soc. Rev. 43 1963 Google Scholar
[23]	Chaur M N, Collado D, Lehn J M 2011 Chem. Eur. J. 17 248 Google Scholar
[24]	Vantomme G, Jiang S, Lehn J M 2014 J. Am. Chem. Soc. 136 9509 Google Scholar
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[27]	Beharry A A, Sadovski O, Woolley G A 2011 J. Am. Chem. Soc. 133 19684 Google Scholar
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[31]	Szymanski W, Beierle J M, Kistemaker H A, Velema W A, Feringa B L 2013 Chem. Rev. 113 6114 Google Scholar
[32]	Cigán M, Gáplovsky M, Jakusová K, Donovalová J, Horváth M, Filo J, Gáplovsky A 2015 RSC Adv. 5 62449 Google Scholar
[33]	Cigáň M, Jakusová K, Gáplovský M, Filo J, Donovalová J, Gáplovský A 2015 Photochem. Photobiol. Sci. 14 2064 Google Scholar
[34]	Tisovský P, Donovalová J, Kožíšek J, Horváth M, Gáplovský A 2022 J. Photochem. Photobiol. A Chem. 427 113827 Google Scholar
[35]	Seleem H S 2011 Chem. Cent. J. 5 8 Google Scholar
[36]	Šandrik R, Tisovský P, Csicsai K, Donovalová J, Gáplovský M, Sokolík R, Filo J, Gáplovský A 2019 Molecules 24 2668 Google Scholar
[37]	Liu H H, Chen Y 2009 J. Phys. Chem. A 113 5550 Google Scholar
[38]	Tochitsky I, Polosukhina A, Degtyar V E, Gallerani N, Smith C M, Friedman A, Van Gelder R N, Trauner D, Kaufer D, Kramer R H 2014 Neuron 81 800 Google Scholar
[39]	Van Herpt J T, Areephong J, Stuart M C, Browne W R, Feringa B L 2014 Chem. Eur. J. 20 1737 Google Scholar
[40]	Nakagawa T, Ubukata T, Yokoyama Y 2018 J. Photochem. Photobiol. C-Photochem. Rev. 34 152 Google Scholar
[41]	Kistemaker J C M, Stacko P, Roke D, Wolters A T, Heideman G H, Chang M C, Van Der Meulen P, Visser J, Otten E, Feringa B L 2017 J. Am. Chem. Soc. 139 9650 Google Scholar
[42]	Kistemaker J C M, Stacko P, Visser J, Feringa B L 2015 Nature Chemistry 7 890 Google Scholar
[43]	Thiel W 1981 J. Am. Chem. Soc. 103 1413 Google Scholar
[44]	Wang J, Durbeej B 2018 ChemistryOpen 7 583 Google Scholar
[45]	Ma J Z, Yang S J, Zhao D, Jiang C W, Lan Z G, Li F L 2022 Int. J. Mol. Sci. 23 3908 Google Scholar
[46]	Pang X J, He H Y, Zhao K Y, Zhang N B, Zhong Q J 2023 Chem. Phys. Lett. 819 140439 Google Scholar
[47]	Zhuang X H, Wang J, Lan Z G 2013 J. Phys. Chem. A 117 4785 Google Scholar
[48]	Pang X J, Cui X Y, Hu D P, Jiang C W, Zhao D, Lan Z G, Li F L 2017 J. Phys. Chem. A 121 1240 Google Scholar
[49]	Weber W, Thiel W 2000 Theor. Chem. Acc. 103 495 Google Scholar
[50]	Otte N, Scholten M, Thiel W 2007 J. Phys. Chem. A 111 5751 Google Scholar
[51]	Lan Z G, Lu Y, Weingart O, Thiel W 2012 J. Phys. Chem. A 116 1510 Google Scholar
[52]	Jin H, Liang M, Arzhantsev S, Li X, Maroncelli M 2010 J. Phys. Chem. B 114 7565 Google Scholar

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靛红双氮二苯腙分子开关的光致异构化机理