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Towards modelling of stochastic kinetics for process related to photochromic dye semi-intercalation in DNA-based polymer matrix

机译:对基于光致变色染料半嵌入基于DNA的聚合物基质中的过程的随机动力学建模

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The semi-intercalation of an azo-dye Disperse Red 1 (DR1) molecule into a biopolymeric material made of deoxyribonucleic acid (DNA) complexed with the cationic surfactant hexadecyltrimethyl-ammonium chloride (CTMA) formulated recently has successfully explained the main experimental results of laser dynamic inscription of diffraction gratings: short response time, low diffraction efficiency, single-exponential kinetics and fiat wavelength dependence. In this paper we generalize the analytic model of Ref. to account for a more realistic dynamics of DNA-CTMA matrix. To this end we extend the model of paper by including into it probabilistic features of local free volume in DNA matrix which characterize, in a simple way, the spatial distribution of local voids which, in turn play the central role for the kinetics of photoinduced trans-cis-trans cycles of DR1 dye under the polarized laser light illumination. We discuss a stochastic master equation which generalizes the simple model of Ref. and address briefly the topic of non-exponential grating inscription in modelling and in recent experiments.
机译:将偶氮染料分散红1(DR1)分子半插入由脱氧核糖核酸(DNA)与阳离子表面活性剂十六烷基三甲基氯化铵(CTMA)络合的生物聚合材料中,已成功解释了激光的主要实验结果衍射光栅的动态标记:响应时间短,衍射效率低,单指数动力学和法定波长依赖性。在本文中,我们推广了Ref的分析模型。来说明DNA-CTMA矩阵更真实的动力学。为此,我们扩展了纸质模型,在其中包括了DNA基质中局部自由体积的概率特征,这些特征以一种简单的方式表征了局部空隙的空间分布,进而在光诱导的反式动力学中起着核心作用。偏振激光照射下DR1染料的顺-反式循环。我们讨论了一个随机主方程,该方程推广了Ref的简单模型。并在建模和最近的实验中简要介绍了非指数光栅刻印的主题。

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