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Hemicyanine-DNA-complex: Application to solid-state dye lasers

机译：半菁-DNA复合物：应用于固态染料激光器

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摘要

Many cationic cyanine dyes show strong fluorescence enhancement when they interact with DNA double strand. In this paper, we studied a hemicyanine dye, 4-[4-(dimethylamino)stylyl] -1-dococylpyridnium bromide (DMASDPB), which is a typical nonlinear optical compound but has not been attracted as a light emitter because of its low fluorescence efficiency. We fabricated DNA-CTMA-DMASDPB complex thin films by spin coating from chloroform/ethanol solution, and demonstrated laser emissions from the films. Their wavelength tuning (600-630 nm) was achieved by changing the angle between two pumping beams interfering on the samples. We also made a durability test under continuous excitation of 3 mJ/ cm2 with 10 Hz about an hour, showing that the degradation of the emission was about 20%.
机译：当许多阳离子花青染料与DNA双链相互作用时，它们会显示出强大的荧光增强作用。在本文中，我们研究了半花青染料4- [4-（二甲基氨基）苯乙烯基] -1-二十二烷基溴化吡啶（DMASDPB），这是一种典型的非线性光学化合物，但由于其荧光低而未被吸引。效率。我们通过从氯仿/乙醇溶液中旋涂制备了DNA-CTMA-DMASDPB复合薄膜，并证明了薄膜的激光发射。通过改变干涉样品的两个泵浦光束之间的角度，可以实现其波长调谐（600-630 nm）。我们还在3 mJ / cm2和10 Hz的连续激发下进行了大约一个小时的耐久性测试，表明发射的衰减约为20％。

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