Strong coupling between localized surface plasmons and molecular absorptions leads to remarkable changes in the photophysical properties of dye‐loaded metal nanoparticles. Here, we report supramolecular nanocomposites consisting of BODIPY, tryptophan, and gold nanoparticles, and investigate the effect of structural variations on their photophysical properties. Our results indicate that the photostability and photosensitization properties of the nanocomposites depend on the chemical composition of the BODIPY molecules. The singlet oxygen quantum yield of the nanocomposites NC1 (BODIPY, B1 bearing a single methyl group) and NC3 (BODIPY, B3 with 5 methyl and 2 iodo groups) were 0.46 and 0.42, respectively, which were significantly higher compared to their individual components. Ultrafast spectroscopy studies revealed that the migration of photoexcited BODIPY electrons to the plasmonic photoexcitation allowed electron transfer into the singlet oxygen states, thereby leading to efficient generation of singlet oxygen.

中文翻译：

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金-BODIPY纳米复合材料中的微调等离子体分子相互作用：化学结构和非共价相互作用的作用。

局部表面等离子体激元和分子吸收之间的强耦合导致染料加载的金属纳米粒子的光物理性质发生显着变化。在这里，我们报告由BODIPY，色氨酸和金纳米颗粒组成的超分子纳米复合材料，并研究结构变化对其光物理性质的影响。我们的结果表明，纳米复合材料的光稳定性和光敏特性取决于BODIPY分子的化学组成。纳米复合材料NC1（BODIPY，B1带有一个甲基）和NC3（BODIPY，B3）的单重态氧量子产率（分别具有5个甲基和2个碘基团）分别为0.46和0.42，与各自的组分相比明显更高。超快光谱研究表明，光激发的BODIPY电子向等离子光激发的迁移使电子转移到单线态氧态，从而导致单线态氧的有效生成。