【24h】

meso-Ester Corroles

机译:中消旋酯

获取原文
获取原文并翻译 | 示例
           

摘要

The introduction of ester groups on the 5- and 15-meso positions of corroles stabilizes them against oxidation and induces a redshift of their absorption and emission spectra. These effects are studied through the photophysical and electrochemical characterization of up to 16 different 5,15-diester corroles, in which the third meso position is free or occupied by an aryl group, a long alkyl chain, or an ester moiety. Single-crystal X-ray structure analysis of five 5,15-diestercorroles and DFT and time-dependent DFT calculations show that the strong electron-withdrawing character of the 5,15 ester substituents is reinforced by their overlap with the macrocyclic aromatic system. The crystal packing of corroles 2, 4, 6, 9, and 15 features short distances between chromophores that are stacked into columns thanks to the low steric hindrance of meso-ester groups. This close packing is partially due to intermolecular interactions that involve inner hydrogen and nitrogen atoms, and thereby, stabilize a single, identical corrole tautomeric form.
机译:酯的5-和15-内消旋位置上引入酯基可稳定其抗氧化作用,并引起其吸收和发射光谱的红移。通过对多达16种不同的5,15-二酯键进行光物理和电化学表征,研究了这些作用,其中第三个内消旋位是游离的或被芳基,长烷基链或酯部分占据。五个5,15-二硬脂酸酯和DFT的单晶X射线结构分析以及与时间有关的DFT计算表明,5,15酯取代基与大环芳族体系的重叠增强了其强大的吸电子特性。由于内消旋酯基团的空间位阻低,因此,在第2、4、6、9和15分子的晶体填充物中,发色团之间的距离很短,发色团堆叠成柱。这种紧密堆积部分是由于涉及内部氢和氮原子的分子间相互作用,从而稳定了单一的,相同的Corrole互变异构形式。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号