Aggregation-Dependent Photoreactive Hemicyanine Assembly as a Photobactericide.
ACS applied materials & interfaces(2020)
摘要
Organic materials that show substantial reactivity under visible light have received considerable attention, due to their wide applications in chemical and biological systems. Hemicyanine pigments possess a strong intramolecular donor-acceptor structure, and thereby display intense absorption in the visible spectral region. However, most excitons are consumed via the twisted intramolecular charge transfer (TICT) process, making hemicyanines generally light-inert. Herein, we describe the development of an amphiphilic hemicyanine dye whose aggregation could be easily regulated using salt or counterions. More importantly, its intrinsic photoreactivity was successfully induced by steric restriction and cofacial arrangement within H-aggregate, thus creating an effective photo-bactericide. This strategy could be extended to the development of photocatalysts for photosynthesis and a photosensitizer for photodynamic therapy.
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关键词
photoreactivity,supramolecular self-assembly,TICT,photobactericide,H-aggregate
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