Reversible Photooxygenation of Alkynylanthracenes: Chemical Generation of Singlet Oxygen under Very Mild Conditions
作者:Werner Fudickar、Torsten Linker
DOI:10.1002/chem.201102230
日期:2011.12.2
In the dark and very fast: The generation of singlet oxygen (1O2) from endoperoxides, which are readily available by photooxygenation of the corresponding anthracenes, proceeds within minutes in the dark (see scheme), a rate hitherto unknown for other anthracenes or naphthalenes. This provides an efficient chemical source of singlet oxygen under very mildconditions.
在黑暗中并且非常快:在黑暗中,几分钟内即可从内过氧化物中产生单线态氧(1 O 2),这些光可通过相应的蒽的光氧化而容易地获得(见方案),这是其他蒽或其他蒽迄今所未知的速率萘。这在非常温和的条件下提供了有效的单重态氧化学来源。
A Photosensitive Polymeric Carrier with a Renewable Singlet Oxygen Reservoir Regulated by Two NIR Beams for Enhanced Antitumor Phototherapy
作者:Chun Yang、Meihui Su、Pei Luo、Yanan Liu、Feng Yang、Changhua Li
DOI:10.1002/smll.202101180
日期:2021.7
sustained 1O2 generation and sufficient oxygen supply during the entire phototherapy is engineered by alternatively applying PDT and photothermal therapy (PTT) controlled by two NIR laser beams. In addition to a photosensitizer that generates 1O2, An-NP consists of two other key components: a molecularly designed anthracene derivative capable of trapping/releasing 1O2 with superior reversibility and a dye
光动力疗法(PDT)利用光敏剂在激光照射下将分子氧转化为单线态氧(1 O 2)以消融肿瘤,会加剧大多数实体瘤已经存在的氧气短缺,因此具有自限性。在此,通过交替应用由两个 NIR 激光束控制的 PDT 和光热疗法 (PTT) ,设计了一种复杂的光敏聚合物材料 (An-NP),可在整个光疗过程中持续产生1 O 2并提供充足的氧气供应。除了产生1 O 2的光敏剂外,An-NP 还包含另外两个关键成分:分子设计的蒽衍生物,能够捕获/释放具有卓越可逆性的1 O 2和具有卓越光热性能的染料 J 聚集体。因此,在 655 nm 激光触发的 PDT 工艺中,An-NP 产生了大量的1 O 2,另外的1 O 2通过转化为 EPO-NP 被捕获;而在随后的 785 nm 激光驱动 PTT 过程中,转化后的 EPO-NP 经历热解以释放捕获的1 O 2并再生 An-NP。肿瘤内氧水平可在 PTT 周期内补充,以供下一轮
Intermediates in the cleavage of endoperoxides
作者:Marcel Bauch、Matthias Klaper、Torsten Linker
DOI:10.1002/poc.3607
日期:2017.4
fragmentations take place, affording anthraquinone, and reactive oxygen species. This mechanism explains the often observed decomposition of endoperoxides during work‐up. Finally, an acid‐catalyzed cleavage has been observed under release of hydrogen peroxide. The results should be interesting for the mechanistic understanding of peroxide decomposition and the endoperoxides might serve as mild sources