Control of Energy Transfer Between Pyrene‐ and Perylene‐Nucleosides by the Sequence of DNA‐Templated Supramolecular Assemblies,ChemistryOpen

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Control of Energy Transfer Between Pyrene‐ and Perylene‐Nucleosides by the Sequence of DNA‐Templated Supramolecular Assemblies
ChemistryOpen ( IF 2.5 ) Pub Date : 2020-02-06 , DOI: 10.1002/open.201900346
Sara Müller ₁ , Yannic Fritz ₁ , Hans-Achim Wagenknecht ₁

Affiliation

DNA was used as supramolecular scaffold to order chromophores and control their optical properties. Ethynylpyrene as energy donor was attached to 2′‐desoxy‐2‐aminoadenosine that binds selectively to thymidines (T) in the template. Ethynylperylene as acceptor was attached to 2′‐desoxyuridine that is complementary to 2′‐desoxyadenosine (A). This donor‐acceptor pair was assembled along single‐stranded DNA templates of different A−T sequences to investigate the sequence control of the energy transfer between the chromophores. The fluorescence intensities increase in the mixed assemblies along the DNA templates from A₁₀T₁₀ over (AATT)₅ to (AT)₁₀, although these templates provide equal numbers of potential binding sites for the two different nucleoside chromophore conjugates and exhibit similar absorbances. This shows that the sequence selective assembly of the two building blocks along DNA templates is programmable and alters the fluorescence readout. Such sequence‐controlled supramolecular chemistry represents the key element for future functional π‐systems in materials for light harvesting of solar energy.

中文翻译：

通过 DNA 模板超分子组装序列控制芘和苝核苷之间的能量转移

DNA 被用作超分子支架来排序发色团并控制其光学特性。作为能量供体的乙炔基芘连接到 2'-脱氧-2-氨基腺苷上，选择性地与模板中的胸苷 (T) 结合。作为受体的乙炔基苝连接至与 2'-脱氧腺苷 (A) 互补的 2'-脱氧尿苷。该供体-受体对沿着不同 A-T 序列的单链 DNA 模板组装，以研究发色团之间能量转移的序列控制。混合组件中的荧光强度沿着 DNA 模板从 A ₁₀ T ₁₀超过 (AATT) ₅到 (AT) ₁₀增加，尽管这些模板为两种不同的核苷发色团缀合物提供了相同数量的潜在结合位点并表现出相似的吸光度。这表明两个结构单元沿着 DNA 模板的序列选择性组装是可编程的并改变荧光读数。这种序列控制的超分子化学代表了未来太阳能光收集材料中功能性π系统的关键要素。

更新日期：2020-02-06

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