Carbon monoxide (CO) is known for its multifaceted role in human physiology, and molecules that release CO in a controlled way have been proposed as therapeutic drugs. In this work, a light-responsive CO-releasing molecule (>CORM-Dabsyl) showed a strong colourimetric response upon photochemical CO-release, owing to the tight conjugation of a Mn(i) tricarbonyl centre to a dabsyl chromophoric ligand (>L). Whereas the complex was very stable in the dark in nitrogen-purged aqueous media, CO-release was effectively triggered using 405 nm irradiation. >CORM-Dabsyl, >L and the inactive product >iCORM-Dabsyl have been investigated by DFT and TD-DFT calculations. Only mild toxicity of >CORM-Dabsyl was observed against LX-2 and HepaRG® human cell lines (IC50 ∼ 30 μM). Finally, to develop a CO storage and release material that is readily applicable to therapeutic situations, >CORM-Dabsyl was loaded on low-cost and easily disposable paper strips, from which the light triggered CO-release was conveniently visible with the naked eye.
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机译:一氧化碳(CO)以其在人体生理学中的多方面作用而闻名,已提出以可控方式释放CO的分子作为治疗药物。在这项工作中,由于Mn(i)三羰基中心紧密结合,因此光响应CO释放分子(> CORM-Dabsyl strong>)在光化学释放CO时显示出很强的比色响应。 dabsyl发色配体(> L strong>)。尽管该络合物在氮气吹扫的水性介质中在黑暗中非常稳定,但使用405 nm辐照有效触发了CO释放。通过DFT和TD-DFT计算研究了> CORM-Dabsyl strong>,> L strong>和非活性产物> iCORM-Dabsyl strong>。仅观察到> CORM-Dabsyl strong>对LX-2和HepaRG®人细胞系(IC50〜30μM)的轻度毒性。最后,为了开发一种适用于治疗情况的CO储存和释放材料,将> CORM-Dabsyl strong>装载到了低成本且易于使用的纸条上,光触发了CO释放可以很方便地进行肉眼可见。
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