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oai:docta.ucm.es:20.500.14352/1148602025-01-18T00:54:09Zcom_20.500.14352_14col_20.500.14352_15

“Push-no-pull” porphyrins for second harmonic generation imaging López Duarte, Ismael Reeve, James E. Pérez-Moreno, Javier Boczarow, Igor Depotter, Griet Fleischhauer, Jan Clays, Koen Anderson, Harry L. The established approach to design a molecule with strong second-order nonlinear optical (NLO) activity is to connect an electron-donor to an electron-acceptor via a pi-conjugated bridge, to generate push-pull system. Surprisingly, we have found that dyes with large first hyperpolarizabilities, and which exhibit strong second harmonic generation (SHG), can be created just by attaching an electron-donor to a porphyrin. The free-base porphyrin core is sufficiently electron-deficient that the hyperpolarizability does not increase on addition of a pyridinium electron-acceptor. 2025-01-17T10:06:44Z 2025-01-17T10:06:44Z 2025-01-17T10:06:44Z 2013 journal article https://hdl.handle.net/20.500.14352/114860 2041-6520 2041-6539 10.1039/c3sc22306j eng PIEF-GA2009-255164 López-Duarte I, Reeve JE, Pérez-Moreno J, Boczarow I, Depotter G, Fleischhauer J, et al. “Push-no-pull” porphyrins for second harmonic generation imaging. Chem Sci [Internet]. 2013 [citado 17 de enero de 2025];4(5):2024. Disponible en: https://xlink.rsc.org/?DOI=c3sc22306j http://creativecommons.org/licenses/by-nc-nd/4.0/ restricted access Attribution-NonCommercial-NoDerivatives 4.0 International Royal Society of Chemistry