Absorption spectra solution

A = solution absorption spectrum B = diffuse reflectance spectrum C = crystal transmission spectrum D = transmission spectrum as KC1 pellet E = absorption spectrum of melt at 400 °C maximum extinction coefficient in parentheses following the band maxima. 

The first attempts to record the Bk(IV) solution absorption spectrum were hindered by the presence of cerium impurities (92). The positions of the Bk(IV) absorption bands, superimposed on the strong Ce(IV) bands, suggested the assignment of Sf7 for the electronic configuration of Bk(IV), in agreement with the actinide hypothesis. 

Fig. 2. Solution absorption spectrum of Bk(III) in 1 M DC104-99.9% D20. Reprinted with permission from the J. Inorg. Nucl. Chem. 34, R. D. Baybarz, J. R. Stokely, and J. R. Peterson, 1972, Pergamon Press, Ltd. (95).

Fig. 8.15. Solution absorption spectrum of Ce 1 (aquo). Jorgensen and Brinen (1963) report an additional band...

Fig. 8.17. Solution absorption spectrum of Pr11 (aquo). Dashed lines indicate calculated curves.

The solution absorption spectrum of Eu3+ aquo ion is given in Fig. 8.23. Although many transitions in the visible and UV region are possible, most of them are forbidden by selection rules based on A 7. 

The utility of such an approach is demonstrated on the molecular level with the case of benzylideneaniline 6-XXXV (R-H), which occupied spectroscopists for nearly three decades (Haselbach and Heilbronner 1968, and references therein). This material is isoelectronic with azobenzene 6-XXXVI and stilbene 6-XXXVII, but its solution absorption spectrum differs significantly from them (Fig. 6.18). 

Fig.6.22 Solution absorption spectrum of molecule 6-XVII(R = Et,R = OH) in methylene chloride. (From Tristani-Kendra and Eckhardt 1984, with permission.)...

Solute Absorption spectrum X max Emission spectrum Optimum concentration Decay time of scintillation... 

Table 3 contains a listing of A values and corresponding values of Qa- If th particle is of uniform density then the absorption spectrum for A will at all wavelengths be proportional to the solution absorption spectrum, i.e.. 

Because of the approximation that = Aobsc this approach will give rise to minimal correction values and an iterative procedure can be used to obtain the desired accuracy [112]. If the particulate system is best described as a vesicle, which is generally the case for membranes, an equivalent A for Qa (vesicles) [114] can also be obtained from Table 3. Of course, the problem at this stage is that in general an equivalent solution absorption spectrum will not be known for the suspension of interest. By also utilizing the circular dichroism data, however, an equivalent solution absorption spectrum can be determined as outlined below. This is called the pseudoreference state approach. 

With the correct solution absorption spectrum (curve a of Figure 41 A), is... 

McMahon showed that M,2-bis-(4-pyridyl)ethylene, (t-BPE), adsorbed on a silver electrode exhibits an excitation profile with a definite maximum at about 600 nm, and then increases again toward the red. The intensities were normalized to perchlorate ion scattering. These maxima have no counterpart in the solution absorption spectrum. This is a case of an off-resonance SERS effect. 

Figure 3 ILCT transitions of the ( -butylammonium)Ir (CO)2(maleonitrile) complex. Luminescence and excitation spectra at 77 K show resolved structure. The dotted line gives the solution absorption spectrum...

The first absorption spectrum of pure Cf(iii) was obtained from the solid state (see Section 11.7.6) [155]. The first solution absorption spectrum was obtained shortly thereafter [164, 234], using 592 fig of mainly the Cf isotope, which introduced problems of shielding and radiolytic gassing to the experiment Nineteen absorption bands were recorded between 280 and 1600 nm from a 1 m DCIO4 solution (see Table 11.11). The absorption spectrum from this work [234]... 

---