作者:Ami Shigeno、Takashi Matsuno、Satoru Hiroto、Hiroshi Shinokubo
DOI:10.1246/cl.150815
日期:2015.12.5
Dehydrative coupling between indoles and isatins provided indolylindolinones in good yields as novel dyes with wide-range absorption due to intramolecular charge-transfer interactions. The HOMO and LUMO levels of indolylindolinones could be manipulated individually by the introduction of substituents on the indole and isatin units, respectively. Indolylindolinones served as a bidentate ligand to Ni(II) and Cu(II) ions to provide stable metal complexes. Metal coordination induced large bathochromic shift of the lowest-energy absorption band to the near-infrared region.
吲哚和异靛的脱水耦合反应生成了吲哚基吲哚啉酮,以良好的产率获得这种新型染料,因其分子内电荷转移相互作用而具有广泛的吸收范围。通过在吲哚和异靛单元上引入取代基,可以分别操控吲哚基吲哚啉酮的HOMO和LUMO能级。吲哚基吲哚啉酮作为二齿配体与Ni(II)和Cu(II)离子形成稳定的金属络合物。金属配位诱导了最低能量吸收带的大红移,扩展至近红外区域。