Enhancing Singlet Oxygen Generation in Conjugates of Silicon Nanocrystals and Organic Photosensitizers.

ABSTRACT: Silicon nanocrystals (SiNCs) are regarded as a green and environmentally friendly material when compared with other semiconductor nanocrystals. Ultra-small SiNCs (with the size 4.6-5.2 nm) demonstrate strong UV absorption and photoluminescence in the near infrared (NIR) range with the high photoluminescence quantum yield (PLQY) up to 60%. In contrast to nanoporous silicon, ultra-small SiNCs do not possess an intrinsic ability to generate singlet oxygen (¹O₂). However, we demonstrate that SiNC-dye conjugates synthesized via microwave assistant hydrosilylation reaction produce ¹O₂ with moderate quantum yield (Φ_Δ) up to 27% in cyclohexane. These interesting results were obtained via measurements of singlet oxygen phosphoresc

SUBMITTER: Beri D 

PROVIDER: S-EPMC7379910 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature