Anion-Responsive Molecules That Exhibit Switching of Two-Photon Optical Properties
Yohei Haketa1, Kenji Kamada2, Hiromitsu Maeda1
1Department of Applied Chemistry College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan.
Abstract:
Two-photon-excited fluorescent probes are important for two-photon microscopy for biomedical studies. In contrast to the many examples of probes for cationic species, such as metal ions, there have been fewer reports on the control of two-photon optical properties by anions because in such systems it is difficult to control the associated π-electronic states. This Minireview summarizes anion-responsive molecules that exhibit changes in two-photon optical properties and describes their molecular design and anion-response mechanisms, which are driven by changes in covalent bonds and noncovalent interactions. Results from a recent study of two-photon systems, where geometries and optical properties are modulated by anion binding, are also discussed.
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