2026-04-17T08:04:47Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/184542024-06-18T13:55:42Zcom_2072_452955com_2072_2054col_2072_453073

00925njm 22002777a 4500 dc Ośmiałowski, Borys author Petrusevich, Elizaveta F. author Antoniak, Magda A. author Grela, Izabela author Bin Jassar, Mohammed A. author Nyk, Marcin author Luis Luis, Josep Maria author Jędrzejewska, Beata author Zaleśny, Robert author Jacquemin, Denis author 2020-07-06 The optimization of nonlinear optical properties for “real-life” applications remains a key challenge for both experimental and theoretical 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 experimental and theoretical 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 J.M.L. is grateful for financial support from the Spanish MICIN PGC2018-098212-B-C22 and the Catalan DIUE 2017SGR39 http://hdl.handle.net/10256/18454 Fotons Photons Fisicoquímica Chemistry, Physical and theoretical Controlling Two-Photon Action Cross Section by Changing a Single Heteroatom Position in Fluorescent Dyes