[2PS-129]
Photoswitching Properties of Azo-BODIPY Derivatives: Effects of Linker Length and Molecular Assembly
발표자Jailenn Jannaraine Puray (공주대학교)
연구책임자한민아 (Kongju National University)
Abstract
Azobenzene undergoes reversible trans-cis photoisomerization. To introduce tunable optical properties into this photoswitching system, three azobenzene–BODIPY conjugates with different alkyl linker lengths were synthesized: AzoC1BODIPY, AzoC6BODIPY, and AzoC12BODIPY. Their photoisomerization and self-assembly behaviors were studied using UV–visible absorption, fluorescence, and ¹H NMR spectroscopy. AzoC1BODIPY exhibited photoisomerization only in less polar solvents such as THF and toluene, whereas AzoC6BODIPY and AzoC12BODIPY showed efficient photoisomerization in both polar and nonpolar solvents, reaching over 90% cis content in THF and toluene and approximately 80% in DMF and DMSO. Optical, fluorescence, and scanning electron microscopy revealed linker and solvent-dependent aggregate morphologies. These results demonstrate the key role of alkyl chain length in governing photoresponsive behavior and self-assembly in Azo-BODIPY systems