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Abegão LMG, Cocca LHZ, Mulatier JC, Pitrat D, Andraud C, Misoguti L, Mendonça CR, Vivas MG, De Boni L. Effective π-electron number and symmetry perturbation effect on the two-photon absorption of oligofluorenes. Phys Chem Chem Phys 2021; 23:18602-18609. [PMID: 34612397 DOI: 10.1039/d1cp02553h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fluorene-based molecules exhibit significant nonlinear optical responses and multiphoton absorption in the visible region, which, combined with the high fluorescence quantum yield in organic solvents, could make this class of materials potentially engaging in diverse photonics applications. Thus, herein, we have determined the two-photon absorption (2PA) of oligofluorenes containing three, five, and seven repetitive units by employing the wavelength-tunable femtosecond Z-scan technique. Our outcomes have shown that the 2PA cross-section in oligofluorenes presents an enhanced value of around 18 GM per Neff, in which Neff is the effective number of π-electrons, for the pure 2PA allowed transition (11Ag-like → 21Ag-like). Furthermore, a weak 2PA transition was observed in the same spectral region strongly allowed by one-photon absorption (11Ag-like → 11Bu-like). This last result suggests a molecular symmetry perturbation, probably induced by the molecular disorder triggered by the increase of moieties in the oligofluorene structure. We have calculated the permanent dipole moment difference related to the lowest-energy transition using the Lippert-Matagaformalism and the 2PA sum-over-states approach to confirm this assumption. Moreover, we have estimated the fundamental limits for the 2PA cross-section in oligofluorenes.
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Affiliation(s)
- Luis M G Abegão
- Photonics Group, Instituto de Física de São Carlos, Universidade de São Paulo, CP 369, 13560-970 São Carlos, SP, Brazil.
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Singh DP, De Oliveira N, Garcia GA, Vredenborg A, Powis I. Experimental and Theoretical Investigation of the 3sp(d) Rydberg States of Fenchone by Polarized Laser Resonance-Enhanced-Multiphoton-Ionization and Fourier Transform VUV Absorption Spectroscopy. Chemphyschem 2020; 21:2468-2483. [PMID: 32893958 DOI: 10.1002/cphc.202000365] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 09/04/2020] [Indexed: 11/08/2022]
Abstract
The VUV absorption spectrum of fenchone is re-examined using synchrotron radiation Fourier transform spectrometry, revealing new vibrational structure. Picosecond laser (2+1) resonance enhanced multiphoton ionization (REMPI) spectroscopy complements this, providing an alternative view of the 3spd Rydberg excitation region. These spectra display broadly similar appearance, with minor differences that are largely explained by referring to calculated one- and two-photon electronic excitation cross-sections. Both show good agreement with Franck-Condon simulations of the relevant vibrational structures. Parent ion REMPI ionization yields with both femtosecond and picosecond excitation laser pulses are studied as a function of laser polarization and intensity, the latter providing insight into the relative two-photon excitation and one-photon ionization rates. The experimental circular-linear dichroism observed in the parent ion yields varies strongly between the 3s and 3p Rydberg states, in good overall agreement with the calculated two-photon excitation circular-linear dichroism, while corroborating other evidence that the 3pz sub-state plays no more than a very minor role in the (2+1) REMPI spectrum. Vibrationally resolved photoelectron spectra are recorded with picosecond pulse duration (2+1) REMPI at selected intermediate vibrational excitations. The 3s intermediate state displays a very strong Δv=0 propensity on ionization, but the 3p intermediate evidences more complex vibronic dynamics, and we infer some 3p→3s internal conversion prior to ionization.
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Affiliation(s)
- Dhirendra P Singh
- School of Chemistry, The University of Nottingham, University Park, Nottingham, NG7 2RD, U.K
| | - Nelson De Oliveira
- Synchrotron SOLEIL, l'Orme des Merisiers, 91192 Cedex, Saint-Aubin BP 48, Gif-sur-Yvette, France
| | - Gustavo A Garcia
- Synchrotron SOLEIL, l'Orme des Merisiers, 91192 Cedex, Saint-Aubin BP 48, Gif-sur-Yvette, France
| | - Arno Vredenborg
- Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ, Nijmegen, Netherlands
- MassSpecpecD BV, Langenkampweg 101, 7522 LL, Enschede, Netherlands
| | - Ivan Powis
- School of Chemistry, The University of Nottingham, University Park, Nottingham, NG7 2RD, U.K
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Dipold J, Vivas MG, Koeckelberghs G, Siqueira JP, De Boni L, Mendonca CR. Probing the Strong Near-IR Two-Photon Transition in Supramolecular Triphenylamine-based Polymers by Nonlinear Absorption Spectroscopy. J Phys Chem B 2020; 124:6147-6153. [PMID: 32539394 DOI: 10.1021/acs.jpcb.0c04127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Due to their capability of film formation and remarkable optical features, semiconductor polymers with high two-photon absorption (2PA) have been studied as potential candidates for the development of organic photonic platforms. Furthermore, there is a high demand for photonic devices operating in the near-infrared (IR) region. However, the magnitude of the nonlinear optical response of random coil polymers in the IR region is weak due to the loss of molecular structure caused by increasing the π-conjugated backbone. Thus, herein we aim to investigate the molecular structure and 2PA features relationship for four polymers with supramolecular (helical) rodlike structure. Such polymers have a rigid core based on triphenylamine groups connected to the chiral binaphthalene units and a strong electron-withdrawing group (EWG). This kind of structure allows a very high chromophore density, which was responsible for generating 2PA cross-section between 305 GM and 565 GM in the near-IR (900-1300 nm), depending on the EWG strength. in light of the two-level model within the sum-overstates approach, we estimated the degree of intramolecular charge transfer induced by 2PA in the IR region, and values as high as 50-70% were found. Such a critical outcome allows the 2PA cross-section in the IR region to remain high even though the ratio between the visible/IR-band 2PA cross-section increases as a function of EWG strength.
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Affiliation(s)
- Jessica Dipold
- Instituto de Fı́sica de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, São Paulo, Brazil
| | - Marcelo G Vivas
- Laboratório de Espectroscopia Óptica e Fotônica, Universidade Federal de Alfenas, Poços de Caldas, Minas Gerais 37715-400, Brazil
| | - Guy Koeckelberghs
- Laboratory for Polymer Synthesis, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, B-3001 Leuven, Belgium
| | - Jonathas P Siqueira
- Instituto de Fı́sica de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, São Paulo, Brazil.,Instituto de Fı́sica "Gleb Wataghin", Universidade Estadual de Campinas, Campinas, São Paulo 13083-859, Brazil
| | - Leonardo De Boni
- Instituto de Fı́sica de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, São Paulo, Brazil
| | - Cleber R Mendonca
- Instituto de Fı́sica de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, São Paulo, Brazil
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Fonseca RD, Vivas MG, Silva DL, Eucat G, Bretonnière Y, Andraud C, Mendonca CR, De Boni L. Intramolecular Cooperative and Anti-Cooperative Effect on the Two-Photon Absorption Cross Section in Triphenylamine Derivatives. J Phys Chem Lett 2019; 10:2214-2219. [PMID: 30958006 DOI: 10.1021/acs.jpclett.9b00518] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The intramolecular cooperative effect in branched molecules is a consequence of the interaction and extent of electronic coupling among the different axes of charge transfer. Such an effect is the key to obtain remarkable nonlinear optical response in molecular systems. Here we show that triphenylamine derivative molecules containing only two branches present the strongest electronic interaction between them at the excited state, generating exponential enhancement of the 2PA cross section. The primary factor for such behavior was ascribed to the substantial extent and interaction of the π-electron delocalization promoted by the strong electron-donating and acceptor antisymmetrical groups present in each branch. However, for the three-branch molecules we observed an anticooperative effect, i.e., the 2PA cross section decreases as compared to the one-branch structure as we normalized the signal by the effective π-electron number in each molecule.
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Affiliation(s)
- Ruben D Fonseca
- Instituto de Física de São Carlos , Universidade de São Paulo , 13560-970 São Carlos , SP , Brazil
- Departamento de Fisica , Universidad popular del Cesar , Barrio Sabana , 2000004 Valledupar , Cesar , Colombia
| | - Marcelo G Vivas
- Laboratório de Espectroscopia Óptica e Fotônica , Universidade Federal de Alfenas , 37715-400 Poços de Caldas , MG , Brazil
| | - Daniel Luiz Silva
- Departamento de Ciências da Natureza, Matemática e Educação , Universidade Federal de São Carlos , Rod. Anhanguera - Km 174 , 13600-970 Araras , SP , Brazil
| | - Gwenaelle Eucat
- Laboratoire de Chimie , Univ Lyon, Ens de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1 , F69342 Lyon , France
| | - Yann Bretonnière
- Laboratoire de Chimie , Univ Lyon, Ens de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1 , F69342 Lyon , France
| | - Chantal Andraud
- Laboratoire de Chimie , Univ Lyon, Ens de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1 , F69342 Lyon , France
| | - Cleber R Mendonca
- Instituto de Física de São Carlos , Universidade de São Paulo , 13560-970 São Carlos , SP , Brazil
| | - Leonardo De Boni
- Instituto de Física de São Carlos , Universidade de São Paulo , 13560-970 São Carlos , SP , Brazil
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Abstract
Atomically-precise chiral gold nanoclusters hold promise for an accurate manipulation of chiro-optical properties, both in linear and nonlinear optics regimes. Here, we present the determination of two-photon linear-circular dichroism and two-photon circular dichroism (TPCD) of Au25[(Capt)18]- (where Capt is captopril). TPCD is found to be two orders of magnitude higher than one-photon circular dichroism.
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Affiliation(s)
- Joanna Olesiak-Banska
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wroclaw University of Science and Technology, Wroclaw 50-370, Poland.
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Vivas MG, Siqueira JP, Silva DL, de Boni L, Mendonca CR. Investigation of the nonlinear absorption spectrum of all-trans retinoic acid by using the steady and transient two-photon absorption spectroscopy. RSC Adv 2015. [DOI: 10.1039/c5ra10719a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This paper reports for the first time a complete study on the steady and transient excited state dynamics induced by 2PA for ATRA.
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Affiliation(s)
- M. G. Vivas
- Instituto de Física de São Carlos
- Universidade de São Paulo
- 13560-970 São Carlos
- Brazil
- Instituto de Ciência de Tecnologia
| | - J. P. Siqueira
- Instituto de Física de São Carlos
- Universidade de São Paulo
- 13560-970 São Carlos
- Brazil
| | - D. L. Silva
- Departamento de Ciências da Natureza
- Matemática e Educação
- Universidade Federal de São Carlos
- 13600-970 Araras
- Brazil
| | - L. de Boni
- Instituto de Física de São Carlos
- Universidade de São Paulo
- 13560-970 São Carlos
- Brazil
| | - C. R. Mendonca
- Instituto de Física de São Carlos
- Universidade de São Paulo
- 13560-970 São Carlos
- Brazil
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Vivas MG, De Boni L, Cooper TM, Mendonca CR. Understanding the Two-Photon Absorption Spectrum of PE2 Platinum Acetylide Complex. J Phys Chem A 2014; 118:5608-13. [DOI: 10.1021/jp503318u] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Marcelo G. Vivas
- Grupo
de Fotônica, Instituto de Física de São Carlos, Universidade de São Paulo, CP 369, 13560-970, São Carlos, SP Brazil
- Instituto
de Ciência de Tecnologia, Universidade Federal de Alfenas, Cidade
Universitária—BR 267 Km 533, 37715-400 Poços de Caldas, MG Brazil
| | - Leonardo De Boni
- Grupo
de Fotônica, Instituto de Física de São Carlos, Universidade de São Paulo, CP 369, 13560-970, São Carlos, SP Brazil
| | - Thomas M. Cooper
- Materials and Manufacturing
Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, United States
| | - Cleber R. Mendonca
- Grupo
de Fotônica, Instituto de Física de São Carlos, Universidade de São Paulo, CP 369, 13560-970, São Carlos, SP Brazil
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Vivas MG, Silva DL, Malinge J, Boujtita M, Zaleśny R, Bartkowiak W, Ågren H, Canuto S, De Boni L, Ishow E, Mendonca CR. Molecular structure-optical property relationships for a series of non-centrosymmetric two-photon absorbing push-pull triarylamine molecules. Sci Rep 2014; 4:4447. [PMID: 24658327 PMCID: PMC3963076 DOI: 10.1038/srep04447] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 03/07/2014] [Indexed: 12/31/2022] Open
Abstract
This article reports on a comprehensive study of the two-photon absorption (2PA) properties of six novel push-pull octupolar triarylamine compounds as a function of the nature of the electron-withdrawing groups. These compounds present an octupolar structure consisting of a triarylamine core bearing two 3,3′-bis(trifluoromethyl)phenyl arms and a third group with varying electron-withdrawing strength (H < CN < CHO < NO2 < Cyet < Vin). The 2PA cross-sections, measured by using the femtosecond open-aperture Z-scan technique, showed significant enhancement from 45 up to 125 GM for the lowest energy band and from 95 up to 270 GM for the highest energy band. The results were elucidated based on the large changes in the transition and permanent dipole moments and in terms of (i) EWG strength, (ii) degree of donor-acceptor charge transfer and (iii) electronic coupling between the arms. The 2PA results were eventually supported and confronted with theoretical DFT calculations of the two-photon transition oscillator strengths.
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Affiliation(s)
- Marcelo G Vivas
- 1] Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil [2] Instituto de Ciência e Tecnologia, Universidade Federal de Alfenas, Cidade Universitária - BR 267 Km 533, 37715-400 Poços de Caldas, MG, Brazil
| | - Daniel L Silva
- 1] Instituto de Física, Universidade de São Paulo, CP 66318, 05314-970, São Paulo, SP, Brazil [2] Departamento de Ciências da Natureza, Matemática e Educação, Universidade Federal de São Carlos, Rod. Anhanguera - Km 174, 13600-970 Araras, SP, Brazil
| | - Jérémy Malinge
- PPSM-UMR CNRS 8531, ENS Cachan, 61 avenue du Président Wilson, 94235 Cachan, France
| | - Mohammed Boujtita
- CEISAM-UMR CNRS 6230, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France
| | - Robert Zaleśny
- Theoretical Chemistry Group, Institute of Physical and Theoretical Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Wojciech Bartkowiak
- Theoretical Chemistry Group, Institute of Physical and Theoretical Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Hans Ågren
- Department of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| | - Sylvio Canuto
- Instituto de Física, Universidade de São Paulo, CP 66318, 05314-970, São Paulo, SP, Brazil
| | - Leonardo De Boni
- Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil
| | - Eléna Ishow
- 1] PPSM-UMR CNRS 8531, ENS Cachan, 61 avenue du Président Wilson, 94235 Cachan, France [2] CEISAM-UMR CNRS 6230, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France
| | - Cleber R Mendonca
- Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil
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