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Ahmed MS, Nayak SK, Bhavani B, Banerjee D, Prasanthkumar S, Giribabu L, Soma VR, Raavi SSK. Hot carrier dynamics in metalated porphyrin-naphthalimide thin films. Phys Chem Chem Phys 2024; 26:15681-15692. [PMID: 38766760 DOI: 10.1039/d4cp00359d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
This study employs femtosecond transient absorption spectroscopy to investigate the rapid dynamics of excited state carriers in three metalated porphyrin-naphthalimide (PN) molecules and one free-base molecule. The dynamics of electron injection, from PN to mesoporous titania (TiO2), in PN adsorbed TiO2 films (Ti-PN), were carefully investigated and compared to PN adsorbed ZrO2 films (Zr-PN). In addition, we examined the self-assembled PN films and found that, in their self-assembled state, these molecules exhibited a longer relaxation time than Zr-PN monomeric films, where the charge injection channel was insignificant. The ground-state bleach band in the Ti-PN films gradually shifted to longer wavelengths, indicating the occurrence of the Stark effect. Faster electron injection was observed for the metalated PN systems and the electron injection times from the various excited states to the conduction band of TiO2 (CB-TiO2) were obtained from the target model analysis of the transient absorption spectra data matrix. In these metal-organic complexes, hot electron injection from PN to CB-TiO2 occurred on a time scale of <360 fs. Importantly, Cu(II)-based PN complexes exhibited faster injection and longer recombination times. The injection times have been estimated to result from a locally excited state at ≈280 fs, a hot singlet excited state at 4.95 ps, and a vibrationally relaxed singlet excited state at 97.88 ps. The critical photophysical and charge injection processes seen here provide the potential for exploring the underlying factors involved and how they correlate with photocatalytic performance.
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Affiliation(s)
- Md Soif Ahmed
- Ultrafast Photophysics and Photonics Laboratory, Department of Physics, Indian Institute of Technology Hyderabad, Kandi 502285, Telangana, India.
| | - Sudhanshu Kumar Nayak
- Ultrafast Photophysics and Photonics Laboratory, Department of Physics, Indian Institute of Technology Hyderabad, Kandi 502285, Telangana, India.
| | - Botta Bhavani
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Dipanjan Banerjee
- Advanced Centre of Research in High Energy Materials (ACRHEM), DRDO Industry Academia - Centre of Excellence (DIA-COE), University of Hyderabad, Hyderabad 500046, Telangana, India
| | - Seelam Prasanthkumar
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Lingamallu Giribabu
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Venugopal Rao Soma
- School of Physics, University of Hyderabad, Hyderabad 500046, Telangana, India
- Advanced Centre of Research in High Energy Materials (ACRHEM), DRDO Industry Academia - Centre of Excellence (DIA-COE), University of Hyderabad, Hyderabad 500046, Telangana, India
| | - Sai Santosh Kumar Raavi
- Ultrafast Photophysics and Photonics Laboratory, Department of Physics, Indian Institute of Technology Hyderabad, Kandi 502285, Telangana, India.
- Department of Climate Change, Indian Institute of Technology Hyderabad, Kandi 502285, Telangana, India
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Ahmed MS, Biswas C, Bhavani B, Prasanthkumar S, Banerjee D, Kumar V, Chetti P, Giribabu L, Rao Soma V, Raavi SSK. Metalated porphyrin-napthalimide based donor-acceptor systems with long-lived triplet states and effective three-photon absorption. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
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3
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Experimental investigation to check the relation of third order optical nonlinearities of Dawson polyoxometalate-porphyrin hybrids with excited state dynamics by using ultrafast life time decay technique. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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4
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Srivishnu KS, Rajesh MN, Banerjee D, Soma VR, Giribabu L. Novel phosphorus(V) tetrabenzotriazacorroles: synthesis, characterization, optical, electrochemical, and femtosecond nonlinear optical studies. Dalton Trans 2022; 51:13779-13794. [PMID: 36039610 DOI: 10.1039/d2dt02298b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of three novel tetrabenzotriazacorroles (TBCs) designed with an alkyl substituent tert-butyl group (TBC-tert), an electron donor phenothiazine group (TBC-PTZ) and an energy donor carbazole group (TBC-CBZ) on the peripheral position with phosphorus metal in the cavity have been synthesized. All three compounds were characterized using various spectroscopic techniques and we assessed their femtosecond third-order nonlinear optical (NLO) properties. TBCs exhibit the properties of both phthalocyanines and corroles as they are derived from parent phthalocyanines. The optical studies revealed a new band at ∼450 nm, which was absent in the parent phthalocyanine molecules, and all three compounds obeyed Beer-Lambert's law. Singlet-state quantum yields were measured in different solvents and were found to be in the range of 0.3 to 0.6 for TBC-tert, 0.21 to 0.25 in the case of TBC-PTZ and 0.31 to 0.41 for TBC-CBZ. Time-resolved fluorescence studies revealed lifetimes in the ns regime (typically few ns). The redox properties of the TBCs suggest that they are easier to oxidize and harder to reduce and exhibit multiple oxidation and reduction potentials. Using the Z-scan technique, the third-order NLO properties were investigated with kilohertz and megahertz repetition rate femtosecond pulses at 800 nm. We report the first observation of strong three-photon absorption in these molecules with coefficients of ∼10-22 cm3 W-2 (∼10-13 cm3 W-2) with kHz (MHz) repetition rate fs pulse excitation.
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Affiliation(s)
- K S Srivishnu
- Polymers & Functional Materials Division, Tarnaka, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Manne Naga Rajesh
- Polymers & Functional Materials Division, Tarnaka, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Dipanjan Banerjee
- Advanced Centre of Research in High Energy Materials (ACRHEM), University of Hyderabad, Hyderabad 500046, Telangana, India.
| | - Venugopal Rao Soma
- Advanced Centre of Research in High Energy Materials (ACRHEM), University of Hyderabad, Hyderabad 500046, Telangana, India.
| | - Lingamallu Giribabu
- Polymers & Functional Materials Division, Tarnaka, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Asif HM, Khan MA, Zhou Y, Zhang L, Iqbal A, Hussain S, Khalid M, Rani S, Sun R. Synthesis, Characterization and Remarkable Nonlinear Absorption of a Pyridyl Containing Symmetrical Porphyrin-Polyoxometalate Hybrid. J CLUST SCI 2022. [DOI: 10.1007/s10876-022-02315-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Rani S, Khan R, Tariq M, Ahmad Z, Asif HM, Khan MA. Experimental analysis of excited state dynamics in Anderson-type POM@porphyrin hybrids in relevance to third-order nonlinear optical properties. J PORPHYR PHTHALOCYA 2022. [DOI: 10.1142/s1088424622500225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This work accounts for the active contribution of life time decay in the field of nonlinear optics, especially for an energetic donor acceptor couple (porphyrin and polyoxometalate (POM)). Currently, two POM free porphyrins (Di-Tris-N@Por and Di-Tris@Por) and their two hybrids with POM (Di-Tris-NPor@Di-AndPOM-1 and Di-TrisPor@Di-AndPOM-2) have been studied keenly in nanosecond time span and resulted lifetimes ([Formula: see text]1 and [Formula: see text]2) have been compared with nonlinear optical parameters. The results demonstrated that Di-Tris-NPor@Di-AndPOM-1 exhibited better third-order nonlinear optical susceptibility [Formula: see text]3, second hyperpolarizability [Formula: see text] and nonlinear absorption [Formula: see text] and Di-TrisPor@Di-AndPOM-2 than Di-TrisPor@Di-AndPOM-2. This superiority of nonlinear optical parameters was supported by lifetime decay studies and electrochemical studies. It is revealed that more relaxation time in excited states lower will be the NLO response. The lifetime decay ([Formula: see text]1) value of Di-Tris-NPor@Di-AndPOM-1 is 3.86ns which is higher than Di-TrisPor@Di-AndPOM-2 possessing lifetime decay ([Formula: see text]1) value of 2.45ns. Moreover, lower energy of charge separated state (-0.88 eV) of Di-Tris-NPor@Di-AndPOM-1 indicates the facile electron transfer in Di-Tris-NPor@Di-AndPOM-1 than Di-TrisPor@Di-AndPOM-2 which experienced more energy of charge separated state. Rapid intersystem crossing is also responsible for the electron transfer from porphyrin moiety to POM moiety.
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Affiliation(s)
- Sonia Rani
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan, 60800, Pakistan
| | - Rabbia Khan
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan, 60800, Pakistan
| | - Muhammad Tariq
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan, 60800, Pakistan
| | - Zahoor Ahmad
- Department of Chemistry, University of Engineering and Technology, Lahore, 54890, Pakistan
| | - Hafiz M. Asif
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan, 60800, Pakistan
| | - Muhammad A. Khan
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan, 60800, Pakistan
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Synthesis, characterization and solution behaviour of tin tetrachloride complexes with phosphoryl ligands bearing polyfluoroalkyl groups. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Zahn C, Stensitzki T, Berg A, Mahammed A, Zacarias A, Gross Z, Heyne K. Ultrafast Electron Transfer in a Self-Assembling Sulfonated Aluminum Corrole-Methylviologen Complex. J Phys Chem B 2021; 125:10571-10577. [PMID: 34506146 DOI: 10.1021/acs.jpcb.1c05687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Photoinduced electron transfer systems can mimic certain features of natural photosynthetic reaction centers, which are crucial for solar energy production. Among other tetra-pyrroles, the versatile chemical and photophysical properties of corroles make them very promising donors applicable in donor-acceptor complexes. Here, we present a first comprehensive study of ultrafast photoinduced electron transfer in a self-assembling sulfonated aluminum corrole-methylviologen complex combining visible and mid-IR transient absorption spectroscopy. The noncovalent D-A association of the corrole-methylviologen complex has the great advantage that photoinduced charge separation becomes possible even though the back electron transfer (BET) rate is large. Initial forward electron transfer from corrole to methylviologen is observed on an ∼130 fs time scale. Subsequent back electron transfer takes place with τBET = (1.8 ± 0.5) ps, revealing very complex relaxation dynamics. Direct probing in the mid-IR allows us to unravel the back electron transfer and cooling dynamics/electronic reorganization. Upon tracing the dynamics of the methylviologen-radical marker band at 1640 cm-1 and the C═C stretching of corrole at around 1500 cm-1, we observe that large amounts of excess energy survive the back transfer, leading to the formation of hot ground state absorption. A closer examination of the signal after 300 ps, surviving the back transfer, exhibits a charge-separation yield of 10-15%.
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Affiliation(s)
- Clark Zahn
- Department of Physics, Free University Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | - Till Stensitzki
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam-Golm, Germany
| | - Alexander Berg
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Atif Mahammed
- Schulich Faculty of Chemistry, Technion Institute of Technology, Haifa 3200008, Israel
| | - Angelica Zacarias
- Max Planck Institute of Microstructure Physics and ETSF, Weinberg 2, D06120 Halle, Germany
| | - Zeev Gross
- Schulich Faculty of Chemistry, Technion Institute of Technology, Haifa 3200008, Israel
| | - Karsten Heyne
- Department of Physics, Free University Berlin, Arnimallee 14, D-14195 Berlin, Germany
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Biswas C, Rao Soma V, Chetti P, Santosh Kumar Raavi S. Ultrafast Excited State Relaxation Dynamics of New Fuchsine- a Triphenylmethane Derivative Dye. Chemphyschem 2021; 22:2562-2572. [PMID: 34528749 DOI: 10.1002/cphc.202100562] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/07/2021] [Indexed: 11/11/2022]
Abstract
An all-inclusive investigation of the ultrafast excited state relaxation dynamics of a triphenylmethane derivative molecule, New Fuchsine (NF), using a combined approach of density functional theory (DFT), femtosecond transient absorption spectroscopy (fs-TAS), and photoluminescence spectroscopy is presented in this work. The DFT calculations confirmed the formation of twisted molecular structure in the excited state of NF in ethanol solution with bond rotation of ≈ 860 . TAS measurements of NF solution exhibited ultrafast ground state-recovery pathway via a conical intersection confirming an ultrafast structural reorientation. On the contrary, TAS measurements of NF thin-film exhibited a longer excited-state lifetime suggesting a hindered molecular twisted state formed as an intermediate step. Photophysical kinetic models are proposed to globally fit the fs-TAS data establishing the twisted intramolecular charge transfer (TICT) state mediated ground state recovery for NF in solution and thin film, respectively. Temperature-dependent photoluminescence study of NF film provided a clear insight into the effect of rotational motion of phenyl rings in NF molecules over the TICT mediated emission.
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Affiliation(s)
- Chinmoy Biswas
- Ultrafast Photophysics and Photonics Laboratory, Department of Physics, Indian Institute of Technology Hyderabad, Kandi 502285, Telangana, India
| | - Venugopal Rao Soma
- Advanced Centre of Research in High Energy Materials (ACRHEM), University of Hyderabad, Hyderabad 500046, Telangana, India
| | - Prabhakar Chetti
- Department of Chemistry, National Institute of Technology, Kurukshetra 136119, Haryana, India
| | - Sai Santosh Kumar Raavi
- Ultrafast Photophysics and Photonics Laboratory, Department of Physics, Indian Institute of Technology Hyderabad, Kandi 502285, Telangana, India
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Katturi NK, Balahoju SA, Ramya A, Biswas C, Raavi SSK, Giribabu L, Soma VR. Ultrafast photophysical and nonlinear optical properties of novel free base and axially substituted phosphorus (V) corroles. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113308] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Lai SH, Wang LL, Wan B, Lu AW, Wang H, Liu HY. Photophysical properties, singlet oxygen generation and DNA binding affinity of Tris(4-pyridyl)corrole and its phosphorous, gallium and tin complexes. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112283] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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12
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Bhattacharya S, Biswas C, Raavi SSK, Venkata Suman Krishna J, Koteshwar D, Giribabu L, Venugopal Rao S. Optoelectronic, femtosecond nonlinear optical properties and excited state dynamics of a triphenyl imidazole induced phthalocyanine derivative. RSC Adv 2019; 9:36726-36741. [PMID: 35539038 PMCID: PMC9075118 DOI: 10.1039/c9ra07758h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 11/05/2019] [Indexed: 11/21/2022] Open
Abstract
A novel zinc phthalocyanine derivative [2(3), 9(10), 16(17), 23(24) tetrakis-4-((4-(1,4,5-triphenyl-1H-imidazol-2-yl)phenyl)ethynyl)phthalocyanine zinc(ii) (PBIPC)] was synthesized by incorporating a triphenyl imidazole moiety at its peripheral positions. The detailed mechanisms of absorption, emission, electrochemical, nonlinear optical (NLO) and photophysical (excited state dynamics) properties of PBIPC were explored. The absorption and emission properties of the compound were studied in different solvents. The incorporation of a triphenyl imidazole moiety at the peripheral position of the zinc phthalocyanine slightly broadened the Soret band. The emission studies revealed fluorescence quantum yields to be in the range of 0.11-0.22. The time-resolved fluorescence data established the radiative lifetimes to be in the nanosecond range. The oxidation and reduction processes were found to be ring centered, which were studied using the cyclic voltammetry (CV) technique. The energy optimized structures and HOMO-LUMO levels were calculated using DFT, TD-DFT analysis and were employed by means of hybrid functional theory (B3LYP) at 6-31G (d,p) basis set in the Gaussian 09 package. Two-photon absorption was observed in the NLO studies performed in the visible wavelength range of 600-800 nm while the nonlinear absorption was dominated by three- and four-photon absorption processes in the NIR wavelength range (1.0-1.5 μm). The molecule exhibited self-focusing behavior for all the wavelengths. Finally, the excited state dynamics of the title molecule PBIPC were investigated using femtosecond transient absorption spectroscopy and the results obtained were understood on the basis of a simple three kinetic model, for excitation wavelengths of 400 nm (Soret band) and 650 nm (Q-band). Both the spectra demonstrated a broad positive transient absorption (TA) data which overlapped with the ground state bleach (GSB), which in turn displayed a red shift over a delay of ∼2 ns. The lifetimes revealed a possibility of intersystem crossing (τ > 1 ns) owing to the triplet state transition.
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Affiliation(s)
- Somdatta Bhattacharya
- Advanced Center for Research in High Energy Materials (ACRHEM), University of Hyderabad South Campus Hyderabad 500046 Telangana India
| | - Chinmoy Biswas
- Department of Physics, Ultrafast Photophysics and Photonics Laboratory, Indian Institute of Technology Hyderabad Kandi 502285 Hyderabad Telangana India
| | - Sai Santosh Kumar Raavi
- Department of Physics, Ultrafast Photophysics and Photonics Laboratory, Indian Institute of Technology Hyderabad Kandi 502285 Hyderabad Telangana India
| | - Jonnadula Venkata Suman Krishna
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology Tarnaka Hyderabad 500007 Telangana India
| | - Devulapally Koteshwar
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology Tarnaka Hyderabad 500007 Telangana India
| | - Lingamallu Giribabu
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology Tarnaka Hyderabad 500007 Telangana India
- Academy of Scientific and Innovative Research (AcSIR) Anusandhan Bhawan, 2 Rafi Marg New Delhi 110001 India
| | - Soma Venugopal Rao
- Advanced Center for Research in High Energy Materials (ACRHEM), University of Hyderabad South Campus Hyderabad 500046 Telangana India
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Mahammed A, Chen K, Vestfrid J, Zhao J, Gross Z. Phosphorus corrole complexes: from property tuning to applications in photocatalysis and triplet-triplet annihilation upconversion. Chem Sci 2019; 10:7091-7103. [PMID: 31588277 PMCID: PMC6677024 DOI: 10.1039/c9sc01463b] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 06/12/2019] [Indexed: 12/13/2022] Open
Abstract
Efficient triplet photosensitizers are important for fundamental photochemical studies and applications such as triplet-triplet annihilation upconversion (TTA UC), photoredox catalytic organic reactions and photovoltaics. We now report a series of phosphorus corrole compounds as efficient visible light-harvesting metal-free triplet photosensitizers. While the heavy-atom-free phosphorus corroles show absorption in the visible spectral region (centered at 573 nm) and have a decent triplet state quantum yield (Φ Δ = 49%), iodo-substitution on the corrole core induces red-shifted absorption (589 nm) and improves intersystem crossing significantly (Φ Δ = 67%). Nanosecond transient absorption spectra confirm triplet state formation upon photoexcitation (τ T = 312 μs) and the iodinated derivatives also display near IR phosphorescence in fluid solution at room temperature (λ em = 796 nm, τ p = 412 μs). Both singlet oxygen (1O2) and superoxide radical anions (O2 -˙) may be produced with the phosphorus corroles, which are competent photocatalysts for the oxidative coupling of benzylamine (the Aza Henry reaction). Very efficient TTA UC was observed with the phosphorus corroles as triplet photosensitizers and perylene as the triplet acceptor, with upconversion quantum yields of up to Φ UC = 38.9% (a factor of 2 was used in the equation) and a very large anti-Stokes effect of 0.5 eV.
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Affiliation(s)
- Atif Mahammed
- Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 32000 , Israel .
| | - Kepeng Chen
- State Key Laboratory of Fine Chemicals , School of Chemical Engineering , Dalian University of Technology , E-208 West Campus, 2 Ling-Gong Road , Dalian 116024 , P. R. China .
| | - Jenya Vestfrid
- Department of Chemistry , University of Toronto , Canada
| | - Jianzhang Zhao
- State Key Laboratory of Fine Chemicals , School of Chemical Engineering , Dalian University of Technology , E-208 West Campus, 2 Ling-Gong Road , Dalian 116024 , P. R. China .
| | - Zeev Gross
- Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 32000 , Israel .
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Pomarico E, Pospíšil P, Bouduban MEF, Vestfrid J, Gross Z, Záliš S, Chergui M, Vlček A. Photophysical Heavy-Atom Effect in Iodinated Metallocorroles: Spin–Orbit Coupling and Density of States. J Phys Chem A 2018; 122:7256-7266. [DOI: 10.1021/acs.jpca.8b05311] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Enrico Pomarico
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide, ISIC and Lausanne Centre for Ultrafast Science (LACUS), FSB, Station 6, CH-1015 Lausanne, Switzerland
| | - Petr Pospíšil
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 3, CZ-182 23 Prague, Czech Republic
| | - Marine E. F. Bouduban
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide, ISIC and Lausanne Centre for Ultrafast Science (LACUS), FSB, Station 6, CH-1015 Lausanne, Switzerland
| | - Jenya Vestfrid
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 32000, Israel
| | - Zeev Gross
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 32000, Israel
| | - Stanislav Záliš
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 3, CZ-182 23 Prague, Czech Republic
| | - Majed Chergui
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide, ISIC and Lausanne Centre for Ultrafast Science (LACUS), FSB, Station 6, CH-1015 Lausanne, Switzerland
| | - Antonín Vlček
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 3, CZ-182 23 Prague, Czech Republic
- School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
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Ultrafast Dynamics of Sb-Corroles: A Combined Vis-Pump Supercontinuum Probe and Broadband Fluorescence Up-Conversion Study. Molecules 2017; 22:molecules22071174. [PMID: 28703762 PMCID: PMC6152390 DOI: 10.3390/molecules22071174] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 07/01/2017] [Accepted: 07/10/2017] [Indexed: 12/17/2022] Open
Abstract
Corroles are a developing class of tetrapyrrole-based molecules with significant chemical potential and relatively unexplored photophysical properties. We combined femtosecond broadband fluorescence up-conversion and fs broadband Vis-pump Vis-probe spectroscopy to comprehensively characterize the photoreaction of 5,10,15-tris-pentafluorophenyl-corrolato-antimony(V)-trans-difluoride (Sb-tpfc-F₂). Upon fs Soret band excitation at ~400 nm, the energy relaxed almost completely to Q band electronic excited states with a time constant of 500 ± 100 fs; this is evident from the decay of Soret band fluorescence at around 430 nm and the rise time of Q band fluorescence, as well as from Q band stimulated emission signals at 600 and 650 nm with the same time constant. Relaxation processes on a time scale of 10 and 20 ps were observed in the fluorescence and absorption signals. Triplet formation showed a time constant of 400 ps, with an intersystem crossing yield from the Q band to the triplet manifold of between 95% and 99%. This efficient triplet formation is due to the spin-orbit coupling of the antimony ion.
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Gao D, Azarias C, D'Aléo A, Giorgi M, Siri O, Balaban TS, Jacquemin D, Canard G. Synthesis and Characterization of Ruffled Phosphorusmeso-Ester Corroles. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201601172] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Di Gao
- Aix Marseille Univ; CNRS; Centrale Marseille; 13288 Marseille Cedex 09 France
| | - Cloé Azarias
- Laboratoire CEISAM; Université de Nantes; CNRS; 2 rue de la Houssinière 44322 Nantes Cedex 03 France
| | - Anthony D'Aléo
- Aix Marseille Univ; CNRS; CINaM; Campus de Luminy, Case 913 13288 Marseille Cedex 09 France
| | - Michel Giorgi
- Aix Marseille Univ; Spectropole; 13288 Marseille Cedex 09 France
| | - Olivier Siri
- Aix Marseille Univ; CNRS; CINaM; Campus de Luminy, Case 913 13288 Marseille Cedex 09 France
| | | | - Denis Jacquemin
- Laboratoire CEISAM; Université de Nantes; CNRS; 2 rue de la Houssinière 44322 Nantes Cedex 03 France
- Institut Universitaire de France (IUF); 1 rue Descartes 75005 Paris Cedex 05 France
| | - Gabriel Canard
- Aix Marseille Univ; CNRS; CINaM; Campus de Luminy, Case 913 13288 Marseille Cedex 09 France
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Stensitzki T, Yang Y, Berg A, Mahammed A, Gross Z, Heyne K. Ultrafast electronic and vibrational dynamics in brominated aluminum corroles: Energy relaxation and triplet formation. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2016; 3:043210. [PMID: 27226980 PMCID: PMC4866960 DOI: 10.1063/1.4949363] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 04/29/2016] [Indexed: 06/05/2023]
Abstract
We combined femtosecond (fs) VIS pump-IR probe spectroscopy with fs VIS pump-supercontinuum probe spectroscopy to characterize the photoreaction of the hexacoordinated Al(tpfc-Br8)(py)2 in a comprehensive way. Upon fs excitation at ∼400 nm in the Soret band, the excitation energy relaxes with a time constant of (250 ± 80) fs to the S2 and S1 electronic excited states. This is evident from the rise time of the stimulated emission signal in the visible spectral range. On the same time scale, narrowing of broad infrared signals in the C=C stretching region around 1500 cm(-1) is observed. Energy redistribution processes are visible in the vibrational and electronic dynamics with time constants between ∼2 ps and ∼20 ps. Triplet formation is detected with a time constant of (95 ± 3) ps. This is tracked by the complete loss of stimulated emission. Electronic transition of the emerging triplet absorption band overlaps considerably with the singlet excited state absorption. In contrast, two well separated vibrational marker bands for triplet formation were identified at 1477 cm(-1) and at 1508 cm(-1). These marker bands allow a precise identification of triplet dynamics in corrole systems.
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Affiliation(s)
- T Stensitzki
- Institute of Experimental Physics, Free University Berlin , Arnimallee 14, 14195 Berlin, Germany
| | - Y Yang
- Institute of Experimental Physics, Free University Berlin , Arnimallee 14, 14195 Berlin, Germany
| | - A Berg
- Institute of Chemistry, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
| | - A Mahammed
- Technion-Israel Institute of Technology , Schulich Faculty of Chemistry, Haifa 32000, Israel
| | - Z Gross
- Technion-Israel Institute of Technology , Schulich Faculty of Chemistry, Haifa 32000, Israel
| | - K Heyne
- Institute of Experimental Physics, Free University Berlin , Arnimallee 14, 14195 Berlin, Germany
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