We have developed a new NIR fluorescent probe based on an ytterbium(III) (E)-1-(pyridin-2-yl-diazenyl)naphthalen-2-ol (PAN) complex. This probe emits near-infrared luminescence derived from the Yb ion through excitation of the PAN moiety with visible light (lambda(ex)= 530 nm, lambda(em)= 975 nm). The results support the possible utility of the probe for in vivo fluorescence molecular imaging.
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Aita et al. (2009) studied this question.
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