Cyclo[m]pyridine[n]pyrroles: Hybrid Macrocycles That Display Expanded π-Conjugation upon Protonation
摘要:
Novel hybrid cyclo[m]pyridine[n]pyrroles have been synthesized using Suzuki coupling. Their NMR and optical spectroscopic features and solid state structural parameters provide support for the proposal that these species are best described as locally aromatic compounds devoid of long-range intersubunit conjugation. However, an extension of the pi-conjugation in the macrocycles can be realized through protonation, as inferred from optical spectroscopic and X-ray diffraction-based structural studies.
作者:Zhan Zhang、Won-Young Cha、Vincent M. Lynch、Dongho Kim、Jonathan L. Sessler
DOI:10.1142/s108842461650019x
日期:2016.1
Novel boron complexes were synthesized by reacting cyclo[[Formula: see text]]pyridine[[Formula: see text]]pyrroles ([Formula: see text] [Formula: see text] 6) with BF3. These complexes were characterized and studied by means of NMR, UV, and fluorescence spectroscopies, and X-ray crystallography. As compared to the non-boronated starting materials, the complexes of this study are more rigid and twisted
新型硼配合物是通过环[[化学式:见正文]]吡啶[[化学式:见正文]]吡咯([化学式:见正文][化学式:见正文]6)与BF反应合成的3. 通过 NMR、UV 和荧光光谱以及 X 射线晶体学对这些配合物进行了表征和研究。与未硼化的起始材料相比,本研究的配合物更加刚性和扭曲,这一特征转化为光学特征的调制。具体来说,这些硼配合物可以是强荧光或几乎没有荧光,这取决于大环中包含的吡啶亚基的数量。因此,本方法可以定义一种有吸引力且可能普遍化的方法,用于调节膨胀卟啉的固有光学特性。