The low quantum yield of luminescence in the NIR region of small (1.8 nm) gold nanoparticles stabilized with triphenylphosphine (TPP) increases by at least 2 orders of magnitude when TPP is replaced with a pyrene derivative. Very efficient energy transfer from the bound fluorophores to the gold core was observed, leading to a strong sensitized emission.
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Montalti et al. (2007) studied this question.
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