Polarity dependence of the radiative and nonradiative rates of flavone derivatives comprising structurally similar amino moieties: Change in the nature of the emitting state

Sarkar M; Kanaparthi RK; Bhattacharya B; Samanta A

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Polarity dependence of the radiative and nonradiative rates of flavone derivatives comprising structurally similar amino moieties: Change in the nature of the emitting state

机译：包含结构相似的氨基部分的黄酮衍生物的辐射速率和非辐射速率的极性相关性：发射态性质的变化

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Photophysical behavior of several structurally related electron donor-acceptor flavone derivatives, which have been synthesized and characterized, has been studied as a function of the polarity of the media. Significant variation of the absorption and fluorescence response of the systems has been observed with change in the polarity of the medium. The results show an increase in the radiative rate constant and a decrease in the nonradiative rate constant of the systems with increase in the polarity of the media. This finding has been attributed to the change in the nature of the emitting state from a mixed n-pi* and pi-pi* state to a dominant pi-pi* state with increase in the polarity of the medium. The results of single-crystal diffraction studies and theoretical calculations based on density functional method support the idea of close proximity of the n-pi* and pi-pi* states and the change in their relative contributions toward the emission process with the polarity of the medium. Laser flash photolysis studies show that the triplet state is not involved in the variation of the fluorescence response of the systems.

机译：已研究和表征了几种结构相关的电子给体-受体黄酮衍生物的光物理行为，这些衍生物是介质极性的函数。随着介质极性的变化，已经观察到系统吸收和荧光响应的显着变化。结果表明，随着介质极性的增加，系统的辐射速率常数增加，而非辐射速率常数减小。该发现归因于随着介质极性的增加，发射态的性质从混合的n-pi *和pi-pi *状态改变为显性的pi-pi *状态。基于密度泛函方法的单晶衍射研究和理论计算的结果支持了n-pi *和pi-pi *态的紧密接近以及它们对发射过程的相对贡献随极性变化的想法。中。激光闪光光解研究表明，三重态不参与系统荧光响应的变化。

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《The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory》 |2008年第15期|共9页
作者
Sarkar M; Kanaparthi RK; Bhattacharya B; Samanta A;
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正文语种 eng
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PROTON-TRANSFER REACTION; LASER FLASH-PHOTOLYSIS; EXCITED-STATE; PHOTOPHYSICAL BEHAVIOR; TRANSFER SPECTROSCOPY; CHARGE-TRANSFER; GROUND-STATE; 3-HYDROXYFLAVONE; FLUORESCENCE; DENSITY;

机译：质子传递反应;激光光解;激发态;光物理行为;传递光谱;电荷传递;基态;3-羟基黄酮;荧光;密度;

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1. Polarity dependence of the radiative and nonradiative rates of flavone derivatives comprising structurally similar amino moieties: Change in the nature of the emitting state [J] . Sarkar M, Kanaparthi RK, Bhattacharya B, The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory . 2008,第15期

机译：包含结构相似的氨基部分的黄酮衍生物的辐射速率和非辐射速率的极性相关性：发射态性质的变化
2. Temperature Dependence of Radiative and Nonradiative Rates from Time-Dependent Correlation Function Methods [J] . Banerjee Shiladitya, Baiardi Alberto, Bloino Julien, Journal of chemical theory and computation: JCTC . 2016,第2期

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4. An efficiency droop model of the saturated radiative recombination rate and its verification by radiative and nonradiative carrier lifetime measurements in InGaN-based light emitting diodes [C] . Jong-In Shim, Hyunsung Kim, Dong-Soo Shin, Gallium nitride materials and devices VI . 2011

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5. Cationic Acrylate Oligomers Comprising Amino Acid Mimic Moieties Demonstrate Improved Antibacterial Killing Efficiency [O] . James L. Grace, Alysha G. Elliott, Johnny X. Huang, -1

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6. Polarity Dependence of the Radiative and Nonradiative Rates of Flavone Derivatives Comprising Structurally Similar Amino Moieties: Change in the Nature of the Emitting State [O] . -1

机译：具有结构相似的氨基部分的黄酮衍生物的辐射和非辐射率的极性依赖性：发光状态的性质变化

Polarity dependence of the radiative and nonradiative rates of flavone derivatives comprising structurally similar amino moieties: Change in the nature of the emitting state

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