近红外发射硝基苯乙烯二亚胺的超快电荷转移动力学

IF 3.2 3区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry C Pub Date : 2025-09-09 DOI:10.1021/acs.jpcc.5c02980

Suvarna Sujilkumar, , , Kavya Vinod, , , Sharat Devadas, , and , Mahesh Hariharan*,

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Further, the solvent-assisted relaxation dynamics of the CT state were explored in toluene (TOL), tetrahydrofuran (THF), and acetonitrile (ACN), which revealed the faster decay time of the CT state to the ground state with increasing solvent polarity (TDI-m-NO2, <math><msub><mi>τ</mi><mrow><mrow><mi>C</mi><mi>T</mi></mrow><mo>→</mo><mrow><mi>G</mi><mi>S</mi></mrow><mrow><mo>(</mo><mi>T</mi><mi>O</mi><mi>L</mi><mo>)</mo></mrow></mrow></msub></math> = 0.68 ns and <math><msub><mi>τ</mi><mrow><mi>C</mi><msup><mi>T</mi><mo>″</mo></msup><mo>→</mo><mrow><mi>G</mi><mi>S</mi></mrow><mrow><mo>(</mo><mi>A</mi><mi>C</mi><mi>N</mi><mo>)</mo></mrow></mrow></msub></math> = 0.20 ns; TDI-d-NO2, <math><msub><mi>τ</mi><mrow><mrow><mi>C</mi><mi>T</mi></mrow><mo>→</mo><mrow><mi>G</mi><mi>S</mi></mrow><mrow><mo>(</mo><mi>T</mi><mi>O</mi><mi>L</mi><mo>)</mo></mrow></mrow></msub></math> = 1.42 ns and <math><msub><mi>τ</mi><mrow><mi>C</mi><msup><mi>T</mi><mo>″</mo></msup><mo>→</mo><mrow><mi>G</mi><mi>S</mi></mrow><mrow><mo>(</mo><mi>A</mi><mi>C</mi><mi>N</mi><mo>)</mo></mrow></mrow></msub></math> = 0.21 ns; and TDI-t-NO2, <math><msub><mi>τ</mi><mrow><mrow><mi>C</mi><mi>T</mi></mrow><mo>→</mo><mrow><mi>G</mi><mi>S</mi></mrow><mrow><mo>(</mo><mi>T</mi><mi>O</mi><mi>L</mi><mo>)</mo></mrow></mrow></msub></math> = 0.46 ns and <math><msub><mi>τ</mi><mrow><mi>C</mi><msup><mi>T</mi><mo>″</mo></msup><mo>→</mo><mrow><mi>G</mi><mi>S</mi></mrow><mrow><mo>(</mo><mi>A</mi><mi>C</mi><mi>N</mi><mo>)</mo></mrow></mrow></msub></math> = 0.18 ns). The work presents an in-depth analysis of the photoexcited state dynamics of a series of extended π-conjugated nitroaromatic chromophores exhibiting emission in the NIR range.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"129 40","pages":"18075–18082"},"PeriodicalIF":3.2000,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ultrafast Charge Transfer Dynamics of Near-Infrared Emitting Nitro-Terrylenediimides\",\"authors\":\"Suvarna Sujilkumar, , , Kavya Vinod, , , Sharat Devadas, , and , Mahesh Hariharan*, \",\"doi\":\"10.1021/acs.jpcc.5c02980\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Investigation of photoinduced exciton dynamics of nitrated rylenediimides can pave the way for a comprehensive understanding of their unique deactivation pathways and utility in future optoelectronic devices. 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引用次数: 0

摘要

研究硝化亚酰亚胺的光致激子动力学可以为全面了解其独特的失活途径和在未来光电器件中的应用铺平道路。本文详细介绍了一系列近红外（NIR）发射硝化亚胺衍生物（TDI-m-NO2， TDI-d-NO2和TDI-t-NO2）的激发态动力学。强吸电子硝基在涤纶芯的凹位置的加入导致分子内电荷转移特性（CT）从稳态测量中揭示出来。在飞秒时域对硝基特亚胺的瞬态吸收进行了测量，研究了光激发下CT态的光谱演变和动力学。在甲苯（TOL）、四氢呋喃（THF）和乙腈（ACN）中考察了CT态的溶剂辅助弛豫动力学，发现随着溶剂极性的增加，CT态向基态的衰减时间越快(TDI-m-NO2, τCT→GS(TOL) = 0.68 ns, τCT″→GS(ACN) = 0.20 ns)；TDI-d-NO2, τCT→GS(TOL) = 1.42 ns, τCT″→GS(ACN) = 0.21 ns；TDI-t-NO2, τCT→GS(TOL) = 0.46 ns, τCT″→GS(ACN) = 0.18 ns。本文深入分析了一系列扩展π共轭硝基芳族发色团在近红外范围内发光的光激发态动力学。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Ultrafast Charge Transfer Dynamics of Near-Infrared Emitting Nitro-Terrylenediimides

查看原文本刊更多论文

Ultrafast Charge Transfer Dynamics of Near-Infrared Emitting Nitro-Terrylenediimides

Investigation of photoinduced exciton dynamics of nitrated rylenediimides can pave the way for a comprehensive understanding of their unique deactivation pathways and utility in future optoelectronic devices. Herein, we present the detailed excited state dynamics of a series of near-infrared (NIR) emitting nitrated terrylenediimide derivatives (TDI-m-NO₂, TDI-d-NO₂, and TDI-t-NO₂). The incorporation of strong electron-withdrawing nitro groups in the bay position of the terrylene core resulted in the intramolecular charge transfer character (CT) revealed from the steady-state measurements. The transient absorption measurements of nitro-terrylenediimides in the femtosecond time domain enabled the investigation of the spectral evolution and kinetics of the CT state upon photoexcitation. Further, the solvent-assisted relaxation dynamics of the CT state were explored in toluene (TOL), tetrahydrofuran (THF), and acetonitrile (ACN), which revealed the faster decay time of the CT state to the ground state with increasing solvent polarity (TDI-m-NO₂, $τ_{C T \to G S (T O L)}$ = 0.68 ns and $τ_{C T^{″} \to G S (A C N)}$ = 0.20 ns; TDI-d-NO₂, $τ_{C T \to G S (T O L)}$ = 1.42 ns and $τ_{C T^{″} \to G S (A C N)}$ = 0.21 ns; and TDI-t-NO₂, $τ_{C T \to G S (T O L)}$ = 0.46 ns and $τ_{C T^{″} \to G S (A C N)}$ = 0.18 ns). The work presents an in-depth analysis of the photoexcited state dynamics of a series of extended π-conjugated nitroaromatic chromophores exhibiting emission in the NIR range.

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来源期刊

The Journal of Physical Chemistry C 化学-材料科学：综合

CiteScore

6.50

自引率

8.10%

发文量

2047

审稿时长

1.8 months

期刊介绍： The Journal of Physical Chemistry A/B/C is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, and chemical physicists.