期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 140, 期 30, 页码 9551-9557出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.8b04531
关键词
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资金
- Australian Research Council (ARC)
- Leopoldina
- German Research Council (DFG)
- DFG [SFB 1176]
Emulating nature's protein paradigm, single-chain nanoparticles (SCNP) are an emerging class of nanomaterials. Synthetic access to SCNPs is limited by ultralow concentrations, demanding reaction conditions, and complex isolation procedures after single-chain collapse. Herein, we exploit the visible light photodimerization of styrylpyrene units as chain folding mechanism. Critically, their positioning along the polymer chain creates a confined environment, increasing the photocycloaddition quantum yields dramatically, enabling single-chain folding at unrivaled high concentrations without subsequent purification. Importantly, the enhanced photoreactivity allows for single-chain folding at lambda = 445 nm LED-irradiation within minutes as well as via ambient light, enabling an unprecedented folding system. The herein demonstrated enhancement of quantum yields by steric confinement serves as a blueprint for all photochemical ligation systems.
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