近赤外光と強く相互作用する有機金属錯体の開発

抄録

The design of near-infrared (NIR) materials is highly relevant to energy and pharmaceutical sciences due to the high proportion of NIR irradiation in the solar spectrum and NIR light's high penetration in biological samples. We show the synthesis of a series of "ball-shaped metal complexes" that absorb in the NIR window. The one-step condensation of cyanoaryls and diimines (known as precursors of phthalocyanines and tetraazaporphyrins) in the presence of a metal (Ru or Fe) afforded a series of compounds with various substituent groups/benzannulated moieties/central metals. The effects of the peripheral substituents and central metal on the NIR optical properties were rationalized based on a combination of theoretical calculations and experimental results. Low-symmetry substituted complexes were also synthesized via the mixed condensation. The concept underlying the synthetic strategy should open the door to a variety of applications of metal-based NIR materials.