Academic Journal
Difluorenyl carbo-benzenes: Synthesis, electronic structure, and two-photon absorption properties of hydrocarbon quadrupolar chromophores
| العنوان: | Difluorenyl carbo-benzenes: Synthesis, electronic structure, and two-photon absorption properties of hydrocarbon quadrupolar chromophores |
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| المؤلفون: | Baglai, Iaroslav, Anda-Villa, Manuel, De, Barba-Barba, Rodrigo M., Poidevin, Corentin, Ramos-Ortiz, Gabriel, Maraval, Valérie, Lepetit, Christine, Saffon-Merceron, N., Maldonado, José-Luis, Chauvin, Rémi |
| المساهمون: | Laboratoire de chimie de coordination (LCC), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Centro de Investigaciones en Optica (CIO), Consejo Nacional de Ciencia y Tecnología Mexico (CONACYT), Université de Toulouse (UT) |
| المصدر: | ISSN: 0947-6539. |
| بيانات النشر: | HAL CCSD Wiley-VCH Verlag |
| سنة النشر: | 2015 |
| المجموعة: | Université Toulouse III - Paul Sabatier: HAL-UPS |
| مصطلحات موضوعية: | [CHIM.COOR]Chemical Sciences/Coordination chemistry |
| الوصف: | International audience ; The synthesis, crystal and electronic structures, and one- and two-photon absorption properties of two quadrupolar fluorenyl-substituted tetra-Ph carbo-benzenes are described. These all-hydrocarbon chromophores, differing in the nature of the linkers between the fluorenyl substituents and the carbo-benzene core (C[n.63743]C bonds for 3 a, C[n.63743]C[n.63741]C[n.63743]C expanders for 3 b), exhibit quasi-superimposable one-photon absorption (1PA) spectra but different two-photon absorption (2PA) cross-sections σ2PA. Z-scan measurements (under NIR femtosecond excitation) indeed showed that the C[n.63741]C expansion results in an approx. twofold increase in the σ2PA value, from 336 to 656 GM (1 GM=10-50 cm4 s mol.-1 photon-1) at λ=800 nm. The first excited states of Au and Ag symmetry accounting for 1PA and 2PA, resp., were calcd. at the TDDFT level of theory and used for sum-over-state estns. of σ2PA(λi), in which λi=2 hc/Ei, h is Planck's const., c is the speed of light, and Ei is the energy of the 2PA-allowed transition. The calcd. σ2PA values of 227 GM at 687 nm for 3 a and 349 GM at 708 nm for 3 b are in agreement with the Z-scan results. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | hal-01915508; https://hal.science/hal-01915508 |
| DOI: | 10.1002/chem.201500482 |
| الاتاحة: | https://hal.science/hal-01915508 https://doi.org/10.1002/chem.201500482 |
| رقم الانضمام: | edsbas.CA7C01B2 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1002/chem.201500482 |
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