NIR materials are designed as the substances that interact with NIR light absorption and emission under external stimulation such as photoexcitation, electric field, and chemical reaction. Doubly N-confused hexaphyrin (N2CH) is one of the synthetic NIR dyes based on expanded porphyrin analgoues containing two ‘‘confused’’ pyrrole rings. Upon metal complexation of N2CH, metal(II) centers are stabilized by two types of the coordination environments, that is, cis-(NNNN,NNCC) and trans-(NNNC,NNNC), in a rectangular geometry. Specifically, bis-organopalladium(II) complex, Pd2N2CH exhibits intriguing near IR absorption properties around 1500 nm. In order to further elucidate the structural effects of M2N2CH on their photophysical properties, we have synthesized and characterized a series of bis-metal(II) complexes with group 10 metal elements. The detailed structures and photophysical properties of M2N2CH will be presented.

Doubly N-confused hexaphyrin bis-metal complexes for near-IR optical materials

251st National Meeting (2016)

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