Spectroscopic investigations discovered that the generated phenylhydrazone anion was significantly bathochromically shifted to visible light region for photoactivation under irradiation. The photoexcited phenylhydrazone anion was potential to reduce aryl iodides single electron transfer process for the subsequent radical chain reaction. A redox-neutral photochemical carbonylation of aryl iodides was developed on basis of the special spectroscopic features of phenylhydrazone anion. This protocol provided a convenient and efficient synthetic tool for accessing carbonylation products under redox neutral conditions without the need of transition-metals.

中文翻译：

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苯腙阴离子激发芳基碘化物与醛的光化学羰基化

光谱研究发现，生成的苯腙阴离子在照射下显着红移至可见光区域进行光活化。光激发的苯腙阴离子有可能减少随后的自由基链反应的芳基碘单电子转移过程。基于苯腙阴离子的特殊光谱特征，开发了芳基碘化物的氧化还原中性光化学羰基化反应。该方案提供了一种方便高效的合成工具，用于在氧化还原中性条件下获得羰基化产物，而不需要过渡金属。