Effects of Chelated and Non-chelated Transition Metal Ions on the Photoreactions of Pyridinecarboxylic Acids in Aqueous Solutions
作者:Akira Sugimori、K\={o}tar\={o} Takada、Tsutomu Kimura、Junji Kamimura
DOI:10.1246/bcsj.54.2068
日期:1981.7
Iron(III) and copper(II) chelated by 2-pyridinecarboxylate bring about the photochemical decarboxylation of the ligand via the electron transfer from carboxylate to metal ions to give pyridine and 2,2′-bipyridine (for Fe(III)) or 2-pyridinol (for Cu(II)). In the presence of iron(III), ruthenium(III), and copper(II), 3-pyridinecarboxylic acid gives photochemically 2,2′-bipyridine-3,5′-dicarboxylic acid without decarboxylation. 4-Pyridinecarboxylic acid is photo-resistant both in the presence and in the absence of iron(III) and copper(II).
2-吡啶羧酸铁(III)和铜(II)螯合物通过羧酸向金属离子转移电子,使配体发生光化学脱羧反应,生成吡啶和2,2′-联吡啶(对于Fe(III))或2-吡啶醇(对于Cu(II))。在铁(III)、钌(III)和铜(II)存在的情况下,3-吡啶羧酸在无脱羧反应的情况下发生光化学反应生成2,2′-联吡啶-3,5′-二羧酸。4-吡啶羧酸在铁(III)和铜(II)存在或不存在的情况下均具有光稳定性。