“…[13][14][15][16][17][18][19][20][21][22] For example, spiropyran, azobenzene, fulgimides and diarylethene are well-known organic photoresponsive groups, but their low absorption range and poor electronic characteristics hamper their use in a wide range of practical applications. [23][24][25][26][27][28][29] Hence, porphyrin has emerged as a vital organic p-conjugated system because its symmetric structure, 18-electron p-conjugated system and rigid aromaticity facilitate the tuning of its physico-chemical properties and self-assembled nanostructures. 30,31 Metal porphyrin and phenanthroline complexes have been well-reported for their intrinsic, intense and efficient light absorption capacity.…”