Nanowerk June 17, 2024
Molecules that can absorb near-infrared light but not visible light have applications in everything from chemotherapy to photodetectors. Researchers in Japan were able to systematically design a large, complex molecule that does not absorb visible light, (it is completely colorless and transparent) but absorbs near-infrared radiation by carefully constructing molecules that have suitable arrangements of electrons. It showed an absorption band in the NIR region without distinct visible-light absorption, which has led to the establishment of colorless characteristics. Theoretical analyses indicated that the combination of a polyene-like electronic structure with orbital symmetry was important to obtain NIR wavelength-selective absorption. The study suggested that a molecular design based on electronic structures could be effective in the development of colorless NIR-absorbing dyes for organic electronics… read more. Open Access TECHNICAL ARTICLE.