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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] [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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2
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Ledwon P, Wiosna-Salyga G, Chapran M, Motyka R. The Effect of Acceptor Structure on Emission Color Tuning in Organic Semiconductors with D-π-A-π-D Structures. NANOMATERIALS 2019; 9:nano9081179. [PMID: 31426483 PMCID: PMC6724117 DOI: 10.3390/nano9081179] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 08/07/2019] [Accepted: 08/13/2019] [Indexed: 12/16/2022]
Abstract
A series of novel donor-acceptor D-π-A-π-D compounds were synthesized and characterized in order to determine the influence of different acceptor units on their properties. The introduction of acceptor moieties had a direct impact on the HOMO and LUMO energy levels. Fluorescence spectra of compounds can be changed by the choice of an appropriate acceptor and were shifted from the green to the near-infrared part of spectra. Due to observed concentration induced emission quenching, the green exciplex type host was used to evaluate the potential of synthesized molecules as emitters in organic light emitting diodes (OLEDs).
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Affiliation(s)
- Przemyslaw Ledwon
- Faculty of Chemistry, Silesian University of Technology, Strzody 9, 44-100 Gliwice, Poland.
| | - Gabriela Wiosna-Salyga
- Department of Molecular Physics, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
| | - Marian Chapran
- Department of Molecular Physics, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Radoslaw Motyka
- Faculty of Chemistry, Silesian University of Technology, Strzody 9, 44-100 Gliwice, Poland
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3
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Morshedi M, Kodikara MS, Corkery TC, Hurst SK, Chavan SS, Kulasekera E, Stranger R, Samoc M, Van Cleuvenbergen S, Asselberghs I, Clays K, Cifuentes MP, Humphrey MG. Quadratic and Cubic Optical Nonlinearities of Y‐Shaped and Distorted‐H‐Shaped Arylalkynylruthenium Complexes. Chemistry 2018; 24:16332-16341. [DOI: 10.1002/chem.201803696] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 09/02/2018] [Indexed: 12/23/2022]
Affiliation(s)
- Mahbod Morshedi
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
| | - Mahesh S. Kodikara
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
| | | | - Stephanie K. Hurst
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
| | - Sanjay S. Chavan
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
| | - Erandi Kulasekera
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
| | - Rob Stranger
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
| | - Marek Samoc
- Advanced Materials Engineering and Modeling Group, Faculty of Chemistry Wroclaw University of Science and Technology 50-370 Wroclaw Poland
| | - Stijn Van Cleuvenbergen
- Centre for Research on Molecular Electronics and Photonics, Laboratory of Chemical and Biological Dynamics Katholieke Universiteit Leuven Celestijnenlaan 200D B-3001 Leuven Belgium
| | - Inge Asselberghs
- Centre for Research on Molecular Electronics and Photonics, Laboratory of Chemical and Biological Dynamics Katholieke Universiteit Leuven Celestijnenlaan 200D B-3001 Leuven Belgium
| | - Koen Clays
- Centre for Research on Molecular Electronics and Photonics, Laboratory of Chemical and Biological Dynamics Katholieke Universiteit Leuven Celestijnenlaan 200D B-3001 Leuven Belgium
| | - Marie P. Cifuentes
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
| | - Mark G. Humphrey
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
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4
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Schwich T, Barlow A, Cifuentes MP, Szeremeta J, Samoc M, Humphrey MG. Stellar Multi-Photon Absorption Materials: Beyond the Telecommunication Wavelength Band. Chemistry 2017; 23:8395-8399. [PMID: 28488357 DOI: 10.1002/chem.201702039] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Indexed: 11/07/2022]
Abstract
Very large molecular two- and three-photon absorption cross-sections are achieved by appending ligated bis(diphosphine)ruthenium units to oligo(p-phenyleneethynylene) (OPE)-based "stars" with arms up to 7 phenyleneethynylene (PE) units in length. Extremely large three- and four-photon absorption cross-sections, through the telecommunications wavelengths range and beyond, are obtained for these complexes upon optimizing OPE length and the ruthenium-coordinated peripheral ligand. Multi-photon absorption (MPA) cross-sections are optimized with stars possessing arms 2 PE units in length. Peripheral ligand variation modifies MPA merit and, in particular, 4-nitrophenylethynyl ligand incorporation enhances maximal MPA values and "switches on" four-photon absorption (4PA) in these low molecular-weight complexes. The 4-nitrophenylethynyl-ligated 2PE-armed star possesses a maximal four-photon absorption cross-section of 1.8×10-108 cm8 s3 at 1750 nm, and significant MPA activity extending beyond 2000 nm.
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Affiliation(s)
- Torsten Schwich
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Adam Barlow
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Marie P Cifuentes
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Janusz Szeremeta
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wroclaw University of Science and Technology, Wroclaw, 50-370, Poland
| | - Marek Samoc
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wroclaw University of Science and Technology, Wroclaw, 50-370, Poland
| | - Mark G Humphrey
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
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Gonçalves Vivas M, Dario Fonseca R, de Paula Siqueira J, Renato Mendonça C, Rodrigues PC, De Boni L. Femtosecond Two-Photon Absorption Spectroscopy of Poly(fluorene) Derivatives Containing Benzoselenadiazole and Benzothiadiazole. MATERIALS (BASEL, SWITZERLAND) 2017; 10:E512. [PMID: 28772872 PMCID: PMC5458991 DOI: 10.3390/ma10050512] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 04/19/2017] [Accepted: 04/28/2017] [Indexed: 11/23/2022]
Abstract
We have investigated the molecular structure and two-photon absorption (2PA) properties relationship of two push-pull poly(fluorene) derivatives containing benzoselenadiazole and benzothiadiazole units. For that, we have used the femtosecond wavelength-tunable Z-scan technique with a low repetition rate (1 kHz) and an energy per pulse on the order of nJ. Our results show that both 2PA spectra present a strong 2PA (around 600 GM (1 GM = 1 × 10-50 cm⁴·s·photon-1)) band at around 720 nm (transition energy 3.45 eV) ascribed to the strongly 2PA-allowed 1Ag-like → mAg-like transition, characteristic of poly(fluorene) derivatives. Another 2PA band related to the intramolecular charge transfer was also observed at around 900 nm (transition energy 2.75 eV). In both 2PA bands, we found higher 2PA cross-section values for the poly(fluorene) containing benzothiadiazole unit. This outcome was explained through the higher charge redistribution at the excited state caused by the benzothiadiazole group as compared to the benzoselenadiazole and confirmed by means of solvatochromic Stokes shift measurements. To shed more light on these results, we employed the sum-over-states approach within the two-energy level model to estimate the maximum permanent dipole moment change related to the intramolecular charge transfer transition.
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Affiliation(s)
- Marcelo Gonçalves Vivas
- Instituto de Ciência e Tecnologia, Universidade Federal de Alfenas, Poços de Caldas, MG 37715-400, Brazil.
| | - Ruben Dario Fonseca
- Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP 13566-590, Brazil.
- Departamento de Ciencias Naturales y Exactas, Universidad de la Costa, Barranquilla 080002, Colombia.
| | | | - Cleber Renato Mendonça
- Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP 13566-590, Brazil.
| | - Paula C Rodrigues
- Departamento Acadêmico de Química e Biologia, Universidade Tecnológica Federal do Paraná, Curitiba, PR 81280-340, Brazil.
| | - Leonardo De Boni
- Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP 13566-590, Brazil.
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Dini D, Calvete MJF, Hanack M. Nonlinear Optical Materials for the Smart Filtering of Optical Radiation. Chem Rev 2016; 116:13043-13233. [PMID: 27933768 DOI: 10.1021/acs.chemrev.6b00033] [Citation(s) in RCA: 245] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The control of luminous radiation has extremely important implications for modern and future technologies as well as in medicine. In this Review, we detail chemical structures and their relevant photophysical features for various groups of materials, including organic dyes such as metalloporphyrins and metallophthalocyanines (and derivatives), other common organic materials, mixed metal complexes and clusters, fullerenes, dendrimeric nanocomposites, polymeric materials (organic and/or inorganic), inorganic semiconductors, and other nanoscopic materials, utilized or potentially useful for the realization of devices able to filter in a smart way an external radiation. The concept of smart is referred to the characteristic of those materials that are capable to filter the radiation in a dynamic way without the need of an ancillary system for the activation of the required transmission change. In particular, this Review gives emphasis to the nonlinear optical properties of photoactive materials for the function of optical power limiting. All known mechanisms of optical limiting have been analyzed and discussed for the different types of materials.
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Affiliation(s)
- Danilo Dini
- Department of Chemistry, University of Rome "La Sapienza" , P.le Aldo Moro 5, I-00185 Rome, Italy
| | - Mário J F Calvete
- CQC, Department of Chemistry, Faculty of Science and Technology, University of Coimbra , Rua Larga, P 3004-535 Coimbra, Portugal
| | - Michael Hanack
- Institut für Organische Chemie, Universität Tübingen , Auf der Morgenstelle 18, D-72076 Tübingen, Germany
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Kundi V, Thankachan PP. Packing of Large Two- and Three-Photon Activity Into Smallest Possible Unsymmetrical Fluorene Chromophores. J Phys Chem A 2016; 120:2757-70. [DOI: 10.1021/acs.jpca.6b02364] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Varun Kundi
- Theoretical Chemistry Lab,
Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
| | - Pompozhi Protasis Thankachan
- Theoretical Chemistry Lab,
Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
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8
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Hanczyc P, Justyniarski A, Gedefaw DA, Andersson MR, Samoc M, Müller C. Two-photon absorption of polyfluorene aggregates stabilized by insulin amyloid fibrils. RSC Adv 2015. [DOI: 10.1039/c5ra08302h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report on the photophysical and optical properties of a polyfluorene derivative (PFO) and its binding to the amyloid-forming protein insulin.
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Affiliation(s)
- P. Hanczyc
- University of California
- Center for Oligomers & Organic Solids
- Santa Barbara
- USA
- Chalmers University of Technology
| | - A. Justyniarski
- Wroclaw University of Technology
- Advanced Materials Engineering and Modelling Group
- Faculty of Chemistry
- Wroclaw
- Poland
| | - D. A. Gedefaw
- Chalmers University of Technology
- Department of Chemistry and Chemical Engineering
- Gothenburg
- Sweden
| | - M. R. Andersson
- Chalmers University of Technology
- Department of Chemistry and Chemical Engineering
- Gothenburg
- Sweden
- University of South Australia
| | - M. Samoc
- Wroclaw University of Technology
- Advanced Materials Engineering and Modelling Group
- Faculty of Chemistry
- Wroclaw
- Poland
| | - C. Müller
- Chalmers University of Technology
- Department of Chemistry and Chemical Engineering
- Gothenburg
- Sweden
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