Photosensitized Thymine Dimerization via Delocalized Triplet Excited States

Miro Paula; Lhiaubet-Vallet Virginie; Luisa Marin M.; Miranda Miguel A.

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Photosensitized Thymine Dimerization via Delocalized Triplet Excited States

机译：光敏的胸腺嘧啶二聚体通过离域三重态激发态。

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摘要

A new mechanism of photosensitized formation of thymine (Thy) dimers is proposed, which involves generation of a delocalized triplet excited state as the key step. This is supported by chemical evidence obtained by combining one benzophenone and two Thy units with different degrees of freedom, whereby the photoreactivity is switched from a clean Paterno-Buchi reaction to a fully chemo-, regio-, and stereoselective [2+2] cycloaddition.

机译：提出了胸腺嘧啶（Thy）二聚体光敏形成的新机理，其中涉及到产生离域三重态激发态是关键步骤。通过将一个二苯甲酮和两个具有不同自由度的Thy单元结合而获得的化学证据支持了这一点，从而将光反应性从纯净的Paterno-Buchi反应切换为完全的化学，区域和立体选择性[2 + 2]环加成反应。

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《Chemistry: A European journal》 |2015年第47期|共6页
作者
Miro Paula; Lhiaubet-Vallet Virginie; Luisa Marin M.; Miranda Miguel A.;
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dimerization; DNA damage; nucleobases; photochemistry; reaction mechanisms;

机译：二聚化;DNA损伤;核碱基;光化学;反应机理;

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1. Photosensitized Thymine Dimerization via Delocalized Triplet Excited States [J] . Miro Paula, Lhiaubet-Vallet Virginie, Luisa Marin M., Chemistry: A European journal . 2015,第47期

机译：光敏的胸腺嘧啶二聚体通过离域三重态激发态。
2. Hetero Bodipy-dimers as heavy atom-free triplet photosensitizers showing a long-lived triplet excited state for triplet-triplet annihilation upconversion [J] . Wanhua Wu, Xiaoneng Cui, Jianzhang Zhao Chemical Communications . 2013,第79期

机译：杂体Bodipy-二聚体作为无重原子的三重态光敏剂，显示三重态-三重态an灭上转换的长寿命三重态激发态
3. Red-light excitable fluorescent platinum(II) bis(aryleneethynylene) bis(trialkylphosphine) complexes showing long-lived triplet excited states as triplet photosensitizers for triplet-triplet annihilation u pcon version [J] . Wanhua Wu, Jianzhang Zhao, Jifu Sun Journal of Materials Chemistry, C. materials for optical and electronic devices . 2013,第4期

机译：红光可激发的荧光铂（II）双（亚芳基乙炔基）双（三烷基膦）配合物，显示长寿命的三重态激发态，可作为三重态三重态let灭的三重态光敏剂
4. Photosensitization Aspects of Pinacyanol H-Aggregates.Charge Injection from Singlet and Triplet Excited States into SnO_2 Nanocrystallites. [C] . Said Barazzouk, Hong Lee, Prashant V.Kamat The Meeting of the Electrochemical Society . 2000

机译：Pinacyanol H-骨料的光敏性方面。从单线素和三联激发态注射到SnO_2纳米晶体中。
5. State-to-state kinetics of electronically excited states in the gas phase: Part~1. The spectroscopy and collisional relaxation of CO(a'triplet sigma state and b triplet sigma state). Part~2. Collisional relaxation of Xe(6p' and 7p) and Kr(5p') [D] . Zikratov, George. 1997

机译：气相中电子激发态的态间动力学：第1部分。 CO的光谱和碰撞弛豫（a'三重态σ和b三重态σ）。第二部分Xe（6p'和7p）和Kr（5p'）的碰撞弛豫
6. Stepwise photosensitized thymine dimerization mediated by an exciton intermediate [O] . Clemens Rauer, Juan J. Nogueira, Philipp Marquetand, -1

机译：激子中间体介导的逐步光敏胸腺嘧啶二聚化
7. Formation of cyclobutane thymine dimers by tiaprofenic acid and its photoproducts: approach to the photosensitizer triplet state energy limit value [O] . Sandra Michaud, Guillaume Bordeau, Valérie Sartor, 2015

机译：通过钛酸和光调节形成环丁烷胸腺嘧啶二聚体：光敏剂三重态能量限值的方法
8. Photoexcited triplet state of sapphyrin dication: Unusual spin alignment in monomers and spin delocalization in dimers [R] . Levanon, H., Michaeli, S., Regev, A., 1990

机译：光激发三重态的sapphyrin dication：单体中不寻常的自旋排列和二聚体中的自旋离域化

Photosensitized Thymine Dimerization via Delocalized Triplet Excited States

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