fabricated with a thiol-protected aryl group to provide Z n S(2) through Z n Br(2), by bromination with N-bromosuccinimide and subsequent Pd-catalyzed Suzuki-Miyaura arylation. Finally, the reaction of Z256 provided Z512, Z768, and Z1024. Collectively, this work provides an important milestone in the preparation of sub-microscale discrete organic molecules and the fabrication of molecular-based materials
在
锌(II)-5,15-双(3,5-二辛氧基氧基苯基)
卟啉Z1的Ag(I)促进的偶联反应的基础上,已尝试使用逐步加倍的方法(其提供Z2)来延长链长Z4,Z8,Z16,Z32,Z64,Z128,Z256,Z384和Z512。尽管Z128的分子长度非常长且呈棒状结构,但其
卟啉阵列仍可充分溶解于
CHCl3和THF中,而Z128上方的阵列则显示出溶解度和稳定性的显着下降。分离出的离散
卟啉阵列通过(1)NMR光谱,基质辅助激光解吸电离飞行时间(MALDI-TOF)质谱,UV / Vis光谱,凝胶渗透色谱(
GPC),循环伏安法(CV),单晶X射线晶体学,扫描隧道显微镜(STM)和原子力显微镜(A
FM)。与阵列Z n(其中n是
卟啉的数目)的预期线性构象相反,Z128,Z256和Z512的单分子图像显示出很大的弯曲结构。该发现表明Z n的基本构象柔性。我们还开发了一种有效的合成路线,通过该路线可以使用
硫醇保护的芳基制备Z