Département de chimie moléculaire

Pyrene chromophores were attached to Si nanocrystals (SiNCs) with diams. of 2.6 and 5.0 nm to provide light-harvesting antennas for enhanced optical absorption. Efficient energy transfer from the pyrene moieties to the SiNCs was obsd. to induce bright visible (2.6 nm) or near-IR (NIR) (5.0 nm) luminescence (PL). The 5.0 nm diam. pyrene-derivatized SiNCs exhibited NIR PL emission that was insensitive to dioxygen, with a 40% quantum yield and long lifetime (hundreds of μs). [on SciFinder(R)]