Through efficient F?rster resonance energy transfer, the near-infrared emission (850 nm) of a guest (weak near-infrared emitter)–host (strong deep-red emitter) system is greatly enhanced by excitation of the host molecule at 508 nm, in comparison with excitation of the guest molecule at 660 nm.
全文链机：http://pubs.rsc.org/en/content/articlelanding/2011/cc/c1cc00066g#!divAbstract