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. Author manuscript; available in PMC: 2014 Apr 4.
Published in final edited form as: J Phys Chem Lett. 2013 Mar 14;4(7):1148–1155. doi: 10.1021/jz4000142

Figure 5.

Figure 5

(Adapted from Ref. 33) The reaction summarizes how the structure of the sensor strand and the stoichiometry of the cluster are linked with the changes in the absorption (solid lines – left axes) and emission (dotted lines – right axes) spectra in the lower panels. (Left) The sensor is comprised of a cluster template (black portion) and a recognition site (red portion) and is folded by an ~11 silver atom cluster (violet) with τmax = 400 nm and minimal near-infrared emission. (Right) Addition of the complementary strand (green) opens the sensor strand, and the absorption of the resulting ~11 atom cluster red-shifts to 730 nm, and the associated emission is magnified.