...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Coherent Exciton Delocalization in a Two-State DNA-Templated Dye Aggregate System
【24h】

Coherent Exciton Delocalization in a Two-State DNA-Templated Dye Aggregate System

机译：两种DNA模板染料综合体系中的相干激子临床化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

src="http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpcafh/2017/jpcafh.2017.121.issue-37/acs.jpca.7b04344/20170915/images/medium/jp-2017-04344y_0007.gif">Coherent exciton delocalization in dye aggregate systems gives rise to a variety of intriguing optical phenomena, including J- and H-aggregate behavior and Davydov splitting. Systems that exhibit coherent exciton delocalization at room temperature are of interest for the development of artificial light-harvesting devices, colorimetric detection schemes, and quantum computers. Here, we report on a simple dye system templated by DNA that exhibits tunable optical properties. At low salt and DNA concentrations, a DNA duplex with two internally functionalized Cy5 dyes (i.e., dimer) persists and displays predominantly J-aggregate behavior. Increasing the salt and/or DNA concentrations was found to promote coupling between two of the DNA duplexes via branch migration, thus forming a four-armed junction (i.e., tetramer) with H-aggregate behavior. This H-tetramer aggregate exhibits a surprisingly large Davydov splitting in its absorbance spectrum that produces a visible color change of the solution from cyan to violet and gives clear evidence of coherent exciton delocalization.
机译：src =“http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpcafh/2017/jpcafh.2017.121.issue-37/acs.jpca.7b04344/20170915/images/medium /jp-2017-04344Y_0007.gif“染料骨料系统中的”膨干激子临床化产生了各种有趣的光学现象，包括J-和H-骨料行为和Davydov分裂。在室温下表现出相干激子删除化的系统对于人工光收集装置，比色检测方案和量子计算机的开发感兴趣。在这里，我们报告了DNA模板的简单染料系统，其具有可调谐光学性质。在低盐和DNA浓度下，具有两个内官能化Cy5染料（即二聚体）的DNA双链体持续并显示主要是J-骨料行为。发现盐和/或DNA浓度增加通过分支迁移促进两​​种DNA双链体之间的偶联，从而形成具有H-聚集行为的四臂结（即，四聚体）。该H-四聚体聚集体在其吸光度谱中展示了一个令人惊讶的大型达维Davydov分裂，其从青色从青色溶液到紫色产生了可见的颜色变化，并提供了连贯的激子删除的明确证据。

著录项

  • 来源
  • 作者

    Brittany L. Cannon; Donald L. Kellis; Lance K. Patten; Paul H. Davis; Jeunghoon Lee; Elton Graugnard; Bernard Yurke; William B. Knowlton;

  • 作者单位

    Micron School of Materials Science &

    Engineering Department of Chemistry &

    Biochemistry and Department of Electrical &

    Computer Engineering Boise State University Boise Idaho 83725 United States;

    Micron School of Materials Science &

    Engineering Department of Chemistry &

    Biochemistry and Department of Electrical &

    Computer Engineering Boise State University Boise Idaho 83725 United States;

    Micron School of Materials Science &

    Engineering Department of Chemistry &

    Biochemistry and Department of Electrical &

    Computer Engineering Boise State University Boise Idaho 83725 United States;

    Micron School of Materials Science &

    Engineering Department of Chemistry &

    Biochemistry and Department of Electrical &

    Computer Engineering Boise State University Boise Idaho 83725 United States;

    Micron School of Materials Science &

    Engineering Department of Chemistry &

    Biochemistry and Department of Electrical &

    Computer Engineering Boise State University Boise Idaho 83725 United States;

    Micron School of Materials Science &

    Engineering Department of Chemistry &

    Biochemistry and Department of Electrical &

    Computer Engineering Boise State University Boise Idaho 83725 United States;

    Micron School of Materials Science &

    Engineering Department of Chemistry &

    Biochemistry and Department of Electrical &

    Computer Engineering Boise State University Boise Idaho 83725 United States;

    Micron School of Materials Science &

    Engineering Department of Chemistry &

    Biochemistry and Department of Electrical &

    Computer Engineering Boise State University Boise Idaho 83725 United States;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 物理化学（理论化学）、化学物理学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号