Abstract A series of bipyridyl (Bpy) Pd(II) complexes with 3-hydroxyflavone (Fla) [PdBpyFla R ][BF 4 ] (R=OCH 3 ( 1 ), R=CH 3 ( 2 ), R=H ( 3 ), R=Cl ( 4 )) were prepared and characterized. The molecular structures of the four compounds were determined by UV–Vis, 1 H NMR, 13 C NMR, COSY, HSQC, HMBC, FTIR, ESI mass spectra and elemental analysis. Their ability to release carbon monoxide was investigated through oxygenation reaction under various conditions of temperature and light irradiation. The nitroxygenation reaction was also studied with nitroxyl, HNO, generated in situ from Angeli’s salt. The experimental results showed that oxygenation reaction of [PdBpyFla] + with oxygen happens at high temperature (> 80 °C) and light does not affect the reaction, whereas nitroxygenation reaction with HNO happens at room temperature without light irradiation. Carbon monoxide released from the complexes during the nitroxygenation reaction was trapped by deoxymyoglobin. Graphic abstract

中文翻译：

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钯(II)联吡啶黄酮酸酯配合物的合成、表征及CO释放性能

摘要 一系列联吡啶(Bpy) Pd(II)与3-羟基黄酮(Fla)的络合物[PdBpyFla R ][BF 4 ] (R=OCH 3 ( 1 ), R=CH 3 ( 2 ), R=H ( 3 ) ), R=Cl ( 4 )) 被制备和表征。四种化合物的分子结构通过UV-Vis、 1 H NMR、 13 C NMR、COSY、HSQC、HMBC、FTIR、ESI质谱和元素分析确定。通过在各种温度和光照条件下的氧化反应研究了它们释放一氧化碳的能力。还用从安吉利盐原位生成的硝酰基 HNO 研究了硝基氧化反应。实验结果表明，[PdBpyFla] + 与氧气的氧化反应发生在高温（> 80 °C）且光照不影响反应，而与 HNO 的硝基氧化反应在室温下发生，无需光照。在硝基氧化反应期间从复合物释放的一氧化碳被脱氧肌红蛋白捕获。图形摘要