UV–vis absorption spectrum of 0.1 mM rhodamine B isothiocyanate (RhBITC) in ethanol
Figure 1 shows the UV–vis absorption spectrum of 0.1 mM
RhBITC in ethanol.
Since the absorption band in Fig. 1 is very broad, the normal
Raman spectrum, taken using 632-nm radiation, is also not clearly
b Normalized peak intensity of RhBITC–μAg at 1,646 cm
-1 ( open circles ) versus excitation
wavelength (514.5 and 632.8 nm) together with the intrinsic
molecular absorption profile of RhBITC in Fig. 1 ; for
comparison, normalized peak intensities of benzenethiol–μAg at
1,573 cm -1 with 514.5-and 632.8-nm excitation are
also marked ( filled circles ).
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