Photo-induced energy and electron transfer in carboxylic acid functionalized bis(4′-tert-butylbiphenyl-4-yl)aniline (BBA)-substituted A3B zinc porphyrins
作者:Suneel Gangada、Pooja、Anjaiah Boligorla、Vijendar Reddy Karla、Srikanth Bandi、Ravinder Pawar、Raghu Chitta
DOI:10.1007/s12039-021-01958-7
日期:2021.12
zinc porphyrins containing BBA attached to the three meso-positions of the porphyrin macrocycle via varied spacers i.e., directly connected, phenyl, and ethoxy phenyl, and carboxylic acid functional group at the other meso-position, were synthesized and fully characterized using 1H, 13C NMR, MALDI-TOF, HRMS (ESI+), UV-visible and fluorescence techniques. The steady-state absorption spectrum of Tetrad-1
三个双(4'-叔丁基联苯-4-基)苯胺 (BBA)-取代的 A 3 B 锌卟啉含有 BBA,通过不同的间隔基连接到卟啉大环的三个中间位,即直接连接的苯基和乙氧基使用1 H、13 C NMR、MALDI-TOF、HRMS (ESI+)、UV-可见光和荧光技术合成并完全表征了苯基和另一个中间位的羧酸官能团。Tetrad-1的稳态吸收光谱显示红移峰表明 BBA 和 ZnP 部分之间存在显着的相互作用,而在 Tetrad -2和Tetrad-3的情况下相互作用逐渐减少由于在发色团之间引入了苯基和乙氧基苯基间隔基。稳态荧光研究表明,四分体中 BBA 部分在 352 nm 处的选择性激发导致在 395 nm 处猝灭 BBA 发射,然后在 618 或 605 nm 处出现卟啉发射,表明光诱导的发生。从单线态激发的 BBA 到 ZnP 的能量转移 (PEnT),即1 (BBA) 3 * -ZnP-CO 2