%0 Journal Article %T DFT study of two-photon absorption of octupolar molecules %+ Université Mouloud Mammeri [Tizi Ouzou] (UMMTO) %+ Institut des Sciences Chimiques de Rennes (ISCR) %A Amar, Anissa %A Boucekkine, Abdou %A Paul, Frédéric %A Mongin, Olivier %Z The authors are grateful to Prof. Lasse Jensen for his help regarding TPA calculations using the AORESPONSE module of ADF2017. The financial support of ANR (Isogate Project) is acknowledged as well as GENCI-IDRIS and GENCI-CINES for an allocation of computing time (Grant No. 2017-2018-080649). %Z GENCI-IDRIS [2017-2018-080649] %Z GENCI-CINES [2017-2018-080649] %< avec comité de lecture %@ 1432-881X %J Theoretical Chemistry Accounts: Theory, Computation, and Modeling %I Springer Verlag %V 138 %N 9 %P in press %8 2019 %D 2019 %R 10.1007/s00214-019-2494-2 %K Triphenyl-isocyanurate %K SAOP %K TD-DFT %K DFT %K Two-photon absorption %Z Chemical SciencesJournal articles %X The two-photon absorption (TPA) properties of octupolar molecules based on a triphenyl-isocyanurate cyclotrimer, a 1,3,5-triphenyl-benzene or a triphenyl-triazine core were theoretically investigated using DFT and TD-DFT computations. These compounds are very promising regarding their potential application especially for optical limitation. These systems, which exhibit a threefold axis, contain three arms with a terminal electron donating group linked in 1, 3 and 5 positions to the central C 3 N 3 O 3 isocyanurate, benzene or triazine ring. The SAOP functional and a DZP basis set were selected for the TPA computations. The so-computed TPA energies and cross sections are in good agreement with the observed data. Increasing the strength of the donor terminal group enhances the TPA cross-section values. The compound with triazine core presents the highest two photon cross-section value compared to the values found for the isocyanurate or the 1,3,5-phenyl core as central ring. Furthermore, this study brings to light a cooperative enhancement of the TPA property between the three arms attached to the isocyanurate ring. %G English %2 https://univ-rennes.hal.science/hal-02278413/document %2 https://univ-rennes.hal.science/hal-02278413/file/DTF%20TPA%20study_Boucekkine_TCAC_DOI-10.1007-s00214-019-2494-2-2.pdf %L hal-02278413 %U https://univ-rennes.hal.science/hal-02278413 %~ UNIV-RENNES1 %~ CNRS %~ INSA-RENNES %~ ENSC-RENNES %~ ISCR %~ SCR_OMC2012 %~ SCR_CPM %~ ISCR-CTI %~ STATS-UR1 %~ UR1-SPM %~ GENCI %~ INC-CNRS %~ UR1-UFR-SPM %~ UR1-HAL %~ ISCR-CORINT %~ UR1-SDLM %~ TEST-UR-CSS %~ UNIV-RENNES %~ INSA-GROUPE %~ ISCR-CORINT1 %~ TEST-HALCNRS %~ UR1-MMS %~ ISCR-CORINT3 %~ TEST2-HALCNRS