Absorption Spectra of Formylchlorins
The absorption spectra of the formylchlorins (in toluene at room temperature) are summarized in Table 2. Three classes are noted: zinc chlorins bearing a 10-mesityl group (ZnC-M10 series); zinc chlorins bearing a 5-p-tolyl group and a 10-mesityl group (ZnC-T5M10 series); and various free base chlorins (FbC series). Selected absorption spectra of the ZnC-M10 series are shown in Figure 1 (see Supporting Information for additional spectra).
 | Table 2 Spectral Properties of Chlorins.a |
 | Figure 1 Absorption spectra (normalized) in toluene at room temperature of ZnC-M10 (trace a, λQy 606 nm),17ZnC-M10F13 (trace b, λQy 634 nm), ZnC-F5P10 (trace c, λQy 650 nm), and ZnC-F3M10F13 (trace d, λQy 667 nm). |
The long-wavelength absorption band can now be tuned over the range of 606 – 667 nm.
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