In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Controlling Two-Photon Action Cross Section by Changing a Single Heteroatom Position in Fluorescent Dyes, published in 2020-08-04, which mentions a compound: 591-54-8, mainly applied to photoisomerization fluorescent dye fluorescence absorption preparation, Computed Properties of C4H5N3.
The optimization of nonlinear optical properties for “”real-life”” applications remains a key challenge for both exptl. and theor. approaches. In particular, for two-photon processes, maximizing the two-photon action cross section (TPACS), the figure of merit for two-photon bioimaging spectroscopy, requires simultaneously controlling all its components. In the present Letter, a series of difluoroborates presenting various heterocyclic rings as an electron acceptor have been synthesized and their absorption, fluorescence, photoisomerization, and two-photon absorption features have been analyzed using both exptl. and theor. approaches. Our results demonstrate that the TPACS values can be fine-tuned by changing the position of a single heteroatom, which alters the fluorescence quantum yields without changing the intrinsic two-photon absorption cross section. This approach offers a new strategy for optimizing TPACS.
This literature about this compound(591-54-8)Computed Properties of C4H5N3has given us a lot of inspiration, and I hope that the research on this compound(4-Aminopyrimidine) can be further advanced. Maybe we can get more compounds in a similar way.