具有不同芳香环连接的联吡啶体系的光物理性质

6-Phenyl-2,2‘-bipyridine linked pyrene and anthracene were synthesized and their photophysical properties were measured in different solvents with different polarity. 4-Pyren-1““-yl-6-phenyl-2,2‘-bipyridine (Ppbpy) showed significant solvent-dependent properities while 4-anthracen-yl-9““-yl-6-phenyl-2,2‘-bipyridine (Apbpy) displayed solvent-independence, although they had similar molecular structure. Because of different twist angle between thyarene and aryl-bipyridine, Ppbpy displayed intermixing behaviors of local excited state (^1La and ^1Lb) and intramolecular charge transfer (ICT), but Apbpy only showed the properties of local excited state ^1La.

Different Photophysical Properties of Aryl‐bipyridine Linked Pyrene and Anthracene

6‐Phenyl‐2,2′‐bipyridine linked pyrene and anthracene were synthesized and their photophysical properties were measured in different solvents with different polarity. 4‐Pyren‐1″‐yl‐6‐phenyl‐2,2′‐bipyridine (Ppbpy) showed significant solvent‐dependent properities while 4‐anthracen‐yl‐9″‐yl‐6‐phenyl‐2,2′‐bipyridine (Apbpy) displayed solvent‐independence, although they had similar molecular structure. Because of different twist angle between the arene and aryl‐bipyridine, Ppbpy displayed intermixing behaviors of local excited state (¹L_a and ¹L_b) and intramolecular charge transfer (ICT), but Apbpy only showed the properties of local excited state ¹L_a.