1
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Sláma V, Cupellini L, Mennucci B. Excitonic Nature of Carotenoid–Phthalocyanine Dyads and Its Role in Transient Absorption Spectra. ACS PHYSICAL CHEMISTRY AU 2022; 2:206-215. [PMID: 35637783 PMCID: PMC9136948 DOI: 10.1021/acsphyschemau.1c00049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/13/2022] [Accepted: 01/18/2022] [Indexed: 11/28/2022]
Abstract
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Artificial carotenoid–tetrapyrrole
dyads have been extensively
used as model systems to understand the quenching mechanisms that
occur in light-harvesting complexes during nonphotochemical quenching.
In particular, dyads containing a carotenoid covalently linked to
a zinc phthalocyanine have been studied by transient absorption spectroscopy,
and the observed signals have been interpreted in terms of an excitonically
coupled state involving the lowest excited states of the two fragments.
If present, such excitonic delocalization would have significant implications
on the mechanism of nonphotochemical quenching. Here, we use quantum
chemical calculations to show that this delocalization is not needed
to reproduce the transient absorption spectra. On the contrary, the
observed signals can be explained through excitonic couplings in the
higher-energy manifold of states. We also argue that the covalent
linkage between the two fragments allows for electronic communications,
which complicates the analysis of the spectra based on two independent
but coupled moieties. These findings call for a more thorough reassessment
of the photophysics in these dyads and its implications in the context
of natural nonphotochemical quenching.
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Affiliation(s)
- Vladislav Sláma
- Dipartimento di Chimica e Chimica Industriale, University of Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
| | - Lorenzo Cupellini
- Dipartimento di Chimica e Chimica Industriale, University of Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
| | - Benedetta Mennucci
- Dipartimento di Chimica e Chimica Industriale, University of Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
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2
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Ravensbergen J, Pillai S, Méndez-Hernández DD, Frese RN, van Grondelle R, Gust D, Moore TA, Moore AL, Kennis JTM. Dual Singlet Excited-State Quenching Mechanisms in an Artificial Caroteno-Phthalocyanine Light Harvesting Antenna. ACS PHYSICAL CHEMISTRY AU 2022; 2:59-67. [PMID: 35098245 PMCID: PMC8796278 DOI: 10.1021/acsphyschemau.1c00008] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 09/29/2021] [Accepted: 09/29/2021] [Indexed: 11/29/2022]
Abstract
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Under excess illumination,
photosystem II of plants dissipates
excess energy through the quenching of chlorophyll fluorescence in
the light harvesting antenna. Various models involving chlorophyll
quenching by carotenoids have been proposed, including (i) direct
energy transfer from chlorophyll to the low-lying optically forbidden
carotenoid S1 state, (ii) formation of a collective quenched
chlorophyll–carotenoid S1 excitonic state, (iii)
chlorophyll–carotenoid charge separation and recombination,
and (iv) chlorophyll–chlorophyll charge separation and recombination.
In previous work, the first three processes were mimicked in model
systems: in a Zn-phthalocyanine–carotenoid dyad with an amide
linker, direct energy transfer was observed by femtosecond transient
absorption spectroscopy, whereas in a Zn-phthalocyanine–carotenoid
dyad with an amine linker excitonic quenching was demonstrated. Here,
we present a transient absorption spectroscopic study on a Zn-phthalocyanine–carotenoid
dyad with a phenylene linker. We observe that two quenching phases
of the phthalocyanine excited state exist at 77 and 213 ps in addition
to an unquenched phase at 2.7 ns. Within our instrument response of
∼100 fs, carotenoid S1 features rise which point
at an excitonic quenching mechanism. Strikingly, we observe an additional
rise of carotenoid S1 features at 3.6 ps, which shows that
a direct energy transfer mechanism in an inverted kinetics regime
is also in effect. We assign the 77 ps decay component to excitonic
quenching and the 3.6 ps/213 ps rise and decay components to direct
energy transfer. Our results indicate that dual quenching mechanisms
may be active in the same molecular system, in addition to an unquenched
fraction. Computational chemistry results indicate the presence of
multiple conformers where one of the dihedral angles of the phenylene
linker assumes distinct values. We propose that the parallel quenching
pathways and the unquenched fraction result from such conformational
subpopulations. Our results suggest that it is possible to switch
between different regimes of quenching and nonquenching through a
conformational change on the same molecule, offering insights into
potential mechanisms used in biological photosynthesis to adapt to
light intensity changes on fast time scales.
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Affiliation(s)
- Janneke Ravensbergen
- Department of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Smitha Pillai
- School of Molecular Sciences and Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | | | - Raoul N. Frese
- Department of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Rienk van Grondelle
- Department of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Devens Gust
- School of Molecular Sciences and Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - Thomas A. Moore
- School of Molecular Sciences and Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - Ana L. Moore
- School of Molecular Sciences and Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1605, United States
| | - John T. M. Kennis
- Department of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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3
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Gacek DA, Betke A, Nowak J, Lokstein H, Walla PJ. Two-photon absorption and excitation spectroscopy of carotenoids, chlorophylls and pigment-protein complexes. Phys Chem Chem Phys 2021; 23:8731-8738. [PMID: 33876032 DOI: 10.1039/d1cp00656h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In addition to (bacterio)chlorophylls, (B)Chls, photosynthetic pigment-protein complexes bind carotenoids (Cars) that fulfil various important functions which are not fully understood, yet. However, certain excited states of Cars are optically one-photon forbidden ("dark") and can potentially undergo excitation energy transfer (EET) to (B)Chls following two-photon absorption (TPA). The amount of EET is reflected by the differences in TPA and two-photon excitation (TPE) spectra of a complex (multi-pigment) system. Since it is technically and analytically demanding to resolve optically forbidden states, different studies reported varying contributions of Cars and Chls to TPE/TPA spectra. In a study using well-defined 1 : 1 Car-tetrapyrrole dyads TPE contributions of tetrapyrrole molecules, including Chls, and Cars were measured. In these experiments, TPE of Cars dominated over Chl a TPE in a broad wavelength range. Another study suggested only minor contributions of Cars to TPE spectra of pigment-protein complexes such as the plant main light-harvesting complex (LHCII), in particular for wavelengths longer than ∼600/1200 nm. By joining forces and a combined analysis of all available data by both teams, we try to resolve this apparent contradiction. Here, we demonstrate that reconstruction of a wide spectral range of TPE for LHCII and photosystem I (PSI) requires both, significant Car and Chl contributions. Direct comparison of TPE spectra obtained in both studies demonstrates a good agreement of the primary data. We conclude that in TPE spectra of LHCII and PSI, the contribution of Chls is dominating above 600/1200 nm, whereas the contributions of forbidden Car states increase particularly at wavelengths shorter than 600/1200 nm. Estimates of Car contributions to TPA as well as TPE spectra are given for various wavelengths.
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Affiliation(s)
- Daniel A Gacek
- Technische Universität Braunschweig, Institute for Physical and Theoretical Chemistry, Department for Biophysical Chemistry, Gaußstr. 17, 38106 Braunschweig, Germany.
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4
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Hart SM, Banal JL, Bathe M, Schlau-Cohen GS. Identification of Nonradiative Decay Pathways in Cy3. J Phys Chem Lett 2020; 11:5000-5007. [PMID: 32484350 DOI: 10.1021/acs.jpclett.0c01201] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Photoexcited fluorescent markers are extensively used in spectroscopy, imaging, and analysis of biological systems. The performance of fluorescent markers depends on high levels of emission, which are limited by competing nonradiative decay pathways. Small-molecule fluorescent dyes have been increasingly used as markers due to their high and stable emission. Despite their prevalence, the nonradiative decay pathways of these dyes have not been determined. Here, we investigate these pathways for a widely used indocarbocyanine dye, Cy3, using transient grating spectroscopy. We identify a nonradiative decay pathway via a previously unknown dark state formed within ∼1 ps of photoexcitation. Our experiments, in combination with electronic structure calculations, suggest that the generation of the dark state is mediated by picosecond vibrational mode coupling, likely via a conical intersection. We further identify the vibrational modes, and thus structural elements, responsible for the formation and dynamics of the dark state, providing insight into suppressing nonradiative decay pathways in fluorescent markers such as Cy3.
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Affiliation(s)
- Stephanie M Hart
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - James L Banal
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Mark Bathe
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Gabriela S Schlau-Cohen
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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5
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Zatsikha YV, Swedin RK, Healy AT, Goff PC, Didukh NO, Blesener TS, Kayser M, Kovtun YP, Blank DA, Nemykin VN. Synthesis, Characterization, and Electron‐Transfer Properties of Ferrocene–BODIPY–Fullerene Near‐Infrared‐Absorbing Triads: Are Catecholopyrrolidine‐Linked Fullerenes a Good Architecture to Facilitate Electron‐Transfer? Chemistry 2019; 25:8401-8414. [DOI: 10.1002/chem.201901225] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 04/16/2019] [Indexed: 01/27/2023]
Affiliation(s)
- Yuriy V. Zatsikha
- Department of Chemistry University of Manitoba Winnipeg MB R3T 2N2 Canada
- Department of Chemistry & Biochemistry University of Minnesota Duluth Duluth MN 55812 USA
| | - Rachel K. Swedin
- Department of Chemistry University of Minnesota Minneapolis MN 55455 USA
| | - Andrew T. Healy
- Department of Chemistry University of Minnesota Minneapolis MN 55455 USA
| | - Philip C. Goff
- Department of Chemistry University of Minnesota Minneapolis MN 55455 USA
| | - Natalia O. Didukh
- Department of Chemistry University of Manitoba Winnipeg MB R3T 2N2 Canada
- Institute of Organic Chemistry National Academy of Sciences Kyiv 02660 Ukraine
| | - Tanner S. Blesener
- Department of Chemistry University of Manitoba Winnipeg MB R3T 2N2 Canada
| | - Mathew Kayser
- Department of Chemistry & Biochemistry University of Minnesota Duluth Duluth MN 55812 USA
| | - Yuriy P. Kovtun
- Institute of Organic Chemistry National Academy of Sciences Kyiv 02660 Ukraine
| | - David A. Blank
- Department of Chemistry University of Minnesota Minneapolis MN 55455 USA
| | - Victor N. Nemykin
- Department of Chemistry University of Manitoba Winnipeg MB R3T 2N2 Canada
- Department of Chemistry & Biochemistry University of Minnesota Duluth Duluth MN 55812 USA
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6
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Gorski A, Knyukshto V, Zenkevich E, Starukhin A, Kijak M, Solarski J, Semeikin A, Lyubimova T. Temperature dependent steric hindrance effects in triplet state relaxation of meso-phenyl-substituted Pd-octaethylporphyrins. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.09.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Gacek DA, Moore AL, Moore TA, Walla PJ. Two-Photon Spectra of Chlorophylls and Carotenoid–Tetrapyrrole Dyads. J Phys Chem B 2017; 121:10055-10063. [DOI: 10.1021/acs.jpcb.7b08502] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel A. Gacek
- Technische Universität Braunschweig, Institute for Physical and Theoretical Chemistry, Department of Biophysical
Chemistry, Gaußstraße.
17, 38106 Braunschweig, Germany
| | - Ana L. Moore
- School
of Molecular Sciences and Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Thomas A. Moore
- School
of Molecular Sciences and Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Peter Jomo Walla
- Technische Universität Braunschweig, Institute for Physical and Theoretical Chemistry, Department of Biophysical
Chemistry, Gaußstraße.
17, 38106 Braunschweig, Germany
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8
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Lee SH, Blake IM, Larsen AG, McDonald JA, Ohkubo K, Fukuzumi S, Reimers JR, Crossley MJ. Synthetically tuneable biomimetic artificial photosynthetic reaction centres that closely resemble the natural system in purple bacteria. Chem Sci 2016; 7:6534-6550. [PMID: 27928494 PMCID: PMC5125414 DOI: 10.1039/c6sc01076h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 06/16/2016] [Indexed: 12/18/2022] Open
Abstract
Porphyrin-based photosynthetic reaction centre (PRC) mimics, ZnPQ-Q2HP-C60 and MP2Q-Q2HP-C60 (M = Zn or 2H), designed to have a similar special-pair electron donor and similar charge-separation distances, redox processes and photochemical reaction rates to those in the natural PRC from purple bacteria, have been synthesised and extensive photochemical studies performed. Mechanisms of electron-transfer reactions are fully investigated using femtosecond and nanosecond transient absorption spectroscopy. In benzonitrile, all models show picosecond-timescale charge-separations and the final singlet charge-separations with the microsecond-timescale. The established lifetimes are long compared to other processes in organic solar cells or other organic light harvesting systems. These rigid, synthetically flexible molecules provide the closest mimics to the natural PRC so far synthesised and present a future direction for the design of light harvesters with controllable absorption, redox, and kinetics properties.
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Affiliation(s)
- Sai-Ho Lee
- School of Chemistry F11 , The University of Sydney , 2006 , NSW , Australia .
| | - Iain M Blake
- School of Chemistry F11 , The University of Sydney , 2006 , NSW , Australia .
| | - Allan G Larsen
- School of Chemistry F11 , The University of Sydney , 2006 , NSW , Australia .
| | - James A McDonald
- School of Chemistry F11 , The University of Sydney , 2006 , NSW , Australia .
| | - Kei Ohkubo
- Department of Material and Life Science , Graduate School of Engineering , Osaka University , Suita , Osaka 565-0871 , Japan .
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 120-750 , Korea ; Faculty of Science and Engineering , Meijo University , Nagoya , Aichi 468-0073 , Japan
| | - Jeffrey R Reimers
- School of Chemistry F11 , The University of Sydney , 2006 , NSW , Australia . ; International Centre for Quantum and Molecular Structure , Shanghai University , 200444 , Shanghai , China . ; School of Mathematical and Physical Sciences , The University of Technology Sydney , 2007 , NSW , Australia .
| | - Maxwell J Crossley
- School of Chemistry F11 , The University of Sydney , 2006 , NSW , Australia .
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9
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Balevičius V, Abramavicius D, Polívka T, Galestian
Pour A, Hauer J. A Unified Picture of S* in Carotenoids. J Phys Chem Lett 2016; 7:3347-3352. [PMID: 27509302 PMCID: PMC5011297 DOI: 10.1021/acs.jpclett.6b01455] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 08/10/2016] [Indexed: 05/29/2023]
Abstract
In π-conjugated chain molecules such as carotenoids, coupling between electronic and vibrational degrees of freedom is of central importance. It governs both dynamic and static properties, such as the time scales of excited state relaxation as well as absorption spectra. In this work, we treat vibronic dynamics in carotenoids on four electronic states (|S0⟩, |S1⟩, |S2⟩, and |Sn⟩) in a physically rigorous framework. This model explains all features previously associated with the intensely debated S* state. Besides successfully fitting transient absorption data of a zeaxanthin homologue, this model also accounts for previous results from global target analysis and chain length-dependent studies. Additionally, we are able to incorporate findings from pump-deplete-probe experiments, which were incompatible to any pre-existing model. Thus, we present the first comprehensive and unified interpretation of S*-related features, explaining them by vibronic transitions on either S1, S0, or both, depending on the chain length of the investigated carotenoid.
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Affiliation(s)
- Vytautas Balevičius
- Department
of Theoretical Physics, Faculty of Physics, Vilnius University, Sauletekio Avenue 9, Building 3, LT-10222 Vilnius, Lithuania
| | - Darius Abramavicius
- Department
of Theoretical Physics, Faculty of Physics, Vilnius University, Sauletekio Avenue 9, Building 3, LT-10222 Vilnius, Lithuania
| | - Tomáš Polívka
- Institute
of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská 1760, 37005 České Budějovice, Czech
Republic
| | | | - Jürgen Hauer
- Photonics
Institute, TU Wien, Gusshausstrasse
27, 1040 Vienna, Austria
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10
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Tosi I, Segado Centellas M, Campioli E, Iagatti A, Lapini A, Sissa C, Baldini L, Cappelli C, Di Donato M, Sansone F, Santoro F, Terenziani F. Excitation Dynamics in Hetero-bichromophoric Calixarene Systems. Chemphyschem 2016; 17:1686-706. [PMID: 26867716 DOI: 10.1002/cphc.201501065] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 01/22/2016] [Indexed: 11/06/2022]
Abstract
In this work, the dynamics of electronic energy transfer (EET) in bichromophoric donor-acceptor systems, obtained by functionalizing a calix[4]arene scaffold with two dyes, was experimentally and theoretically characterized. The investigated compounds are highly versatile, due to the possibility of linking the dye molecules to the cone or partial cone structure of the calix[4]arene, which directs the two active units to the same or opposite side of the scaffold, respectively. The dynamics and efficiency of the EET process between the donor and acceptor units was investigated and discussed through a combined experimental and theoretical approach, involving ultrafast pump-probe spectroscopy and density functional theory based characterization of the energetic and spectroscopic properties of the system. Our results suggest that the external medium strongly determines the particular conformation adopted by the bichromophores, with a direct effect on the extent of excitonic coupling between the dyes and hence on the dynamics of the EET process itself.
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Affiliation(s)
- Irene Tosi
- Dipartimento di Chimica, Università di Parma, Parco Area delle Scienze 17/a, 43124, Parma, Italy
| | | | - Elisa Campioli
- Dipartimento di Chimica, Università di Parma, Parco Area delle Scienze 17/a, 43124, Parma, Italy
| | - Alessandro Iagatti
- LENS (European Laboratory for Non Linear Spectroscopy), via N. Carrara 1, 50019, Sesto Fiorentino (FI), Italy.,INO (Istituto Nazionale di Ottica), Largo Fermi 6, 50125, Firenze, Italy
| | - Andrea Lapini
- LENS (European Laboratory for Non Linear Spectroscopy), via N. Carrara 1, 50019, Sesto Fiorentino (FI), Italy.,Dipartimento di Chimica "Ugo Schiff", Università di Firenze, via della Lastruccia 13, 50019, Sesto Fiorentino (FI), Italy
| | - Cristina Sissa
- Dipartimento di Chimica, Università di Parma, Parco Area delle Scienze 17/a, 43124, Parma, Italy
| | - Laura Baldini
- Dipartimento di Chimica, Università di Parma, Parco Area delle Scienze 17/a, 43124, Parma, Italy.
| | - Chiara Cappelli
- Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126, Pisa, Italy.
| | - Mariangela Di Donato
- LENS (European Laboratory for Non Linear Spectroscopy), via N. Carrara 1, 50019, Sesto Fiorentino (FI), Italy. .,INO (Istituto Nazionale di Ottica), Largo Fermi 6, 50125, Firenze, Italy. .,Dipartimento di Chimica "Ugo Schiff", Università di Firenze, via della Lastruccia 13, 50019, Sesto Fiorentino (FI), Italy.
| | - Francesco Sansone
- Dipartimento di Chimica, Università di Parma, Parco Area delle Scienze 17/a, 43124, Parma, Italy
| | - Fabrizio Santoro
- CNR-Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), UOS di Pisa, Area della Ricerca via G. Moruzzi 1, I-56124, Pisa, Italy
| | - Francesca Terenziani
- Dipartimento di Chimica, Università di Parma, Parco Area delle Scienze 17/a, 43124, Parma, Italy.
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11
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He G, Shao J, Li Y, Hu J, Zhu H, Wang X, Guo Q, Chi C, Xia A. Photophysical properties of octupolar triazatruxene-based chromophores. Phys Chem Chem Phys 2016; 18:6789-98. [DOI: 10.1039/c5cp07563g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The intramolecular charge transfer properties of tribranched chromophores related to their TPA properties are explored by estimating the TPA essential factors.
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Affiliation(s)
- Guiying He
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Photochemistry, Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- People's Republic of China
| | - Jinjun Shao
- Department of Chemistry
- National University of Singapore
- Singapore
| | - Yang Li
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Photochemistry, Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- People's Republic of China
| | - Jiangpu Hu
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Photochemistry, Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- People's Republic of China
| | - Huaning Zhu
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Photochemistry, Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- People's Republic of China
| | - Xian Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Photochemistry, Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- People's Republic of China
| | - Qianjin Guo
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Photochemistry, Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- People's Republic of China
| | - Chunyan Chi
- Department of Chemistry
- National University of Singapore
- Singapore
| | - Andong Xia
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Photochemistry, Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- People's Republic of China
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12
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Zhu H, Li Y, Chen J, Zhou M, Niu Y, Zhang X, Guo Q, Wang S, Yang G, Xia A. Excited-State Deactivation of Branched Phthalocyanine Compounds. Chemphyschem 2015; 16:3893-901. [DOI: 10.1002/cphc.201500738] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Revised: 09/29/2015] [Indexed: 01/22/2023]
Affiliation(s)
- Huaning Zhu
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Yang Li
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Jun Chen
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
- School of Materials Science and Engineering; Jiangxi University of Science and Technology; Ganzhou 341000 China
| | - Meng Zhou
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Yingli Niu
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Xinxing Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Qianjin Guo
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Shuangqing Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Guoqiang Yang
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
| | - Andong Xia
- Beijing National Laboratory for Molecular Sciences (BNLMS) and Key Laboratory of Photochemistry; Institute of Chemistry; Chinese Academy of Sciences; Bejing 100190 China
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13
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Ragnoni E, Di Donato M, Iagatti A, Lapini A, Righini R. Mechanism of the Intramolecular Charge Transfer State Formation in all-trans-β-Apo-8′-carotenal: Influence of Solvent Polarity and Polarizability. J Phys Chem B 2014; 119:420-32. [DOI: 10.1021/jp5093288] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Elena Ragnoni
- LENS (European
Laboratory for Non-Linear Spectroscopy) via N. Carrara 1, 50019 Sesto Fiorentino (Florence) Italy
- INO (Istituto
Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
| | - Mariangela Di Donato
- LENS (European
Laboratory for Non-Linear Spectroscopy) via N. Carrara 1, 50019 Sesto Fiorentino (Florence) Italy
- INO (Istituto
Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
- Dipartimento
di Chimica “Ugo Schiff”, Università di Firenze, via della
Lastruccia 13, 50019 Sesto Fiorentino (Florence), Italy
| | - Alessandro Iagatti
- LENS (European
Laboratory for Non-Linear Spectroscopy) via N. Carrara 1, 50019 Sesto Fiorentino (Florence) Italy
- INO (Istituto
Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
| | - Andrea Lapini
- LENS (European
Laboratory for Non-Linear Spectroscopy) via N. Carrara 1, 50019 Sesto Fiorentino (Florence) Italy
- INO (Istituto
Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
- Dipartimento
di Chimica “Ugo Schiff”, Università di Firenze, via della
Lastruccia 13, 50019 Sesto Fiorentino (Florence), Italy
| | - Roberto Righini
- LENS (European
Laboratory for Non-Linear Spectroscopy) via N. Carrara 1, 50019 Sesto Fiorentino (Florence) Italy
- INO (Istituto
Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
- Dipartimento
di Chimica “Ugo Schiff”, Università di Firenze, via della
Lastruccia 13, 50019 Sesto Fiorentino (Florence), Italy
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14
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Ferretti M, Duquesne K, Sturgis JN, van Grondelle R. Ultrafast excited state processes in Roseobacter denitrificans antennae: comparison of isolated complexes and native membranes. Phys Chem Chem Phys 2014; 16:26059-66. [DOI: 10.1039/c4cp02986k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Fathalla M, Barnes JC, Young RM, Hartlieb KJ, Dyar SM, Eaton SW, Sarjeant AA, Co DT, Wasielewski MR, Stoddart JF. Photoinduced Electron Transfer within a Zinc Porphyrin-Cyclobis(paraquat-p-phenylene) Donor-Acceptor Dyad. Chemistry 2014; 20:14690-7. [DOI: 10.1002/chem.201403744] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Indexed: 12/12/2022]
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16
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Di Donato M, Segado Centellas M, Lapini A, Lima M, Avila F, Santoro F, Cappelli C, Righini R. Combination of transient 2D-IR experiments and ab initio computations sheds light on the formation of the charge-transfer state in photoexcited carbonyl carotenoids. J Phys Chem B 2014; 118:9613-30. [PMID: 25050938 DOI: 10.1021/jp505473j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The excited state dynamics of carbonyl carotenoids is very complex because of the coupling of single- and doubly excited states and the possible involvement of intramolecular charge-transfer (ICT) states. In this contribution we employ ultrafast infrared spectroscopy and theoretical computations to investigate the relaxation dynamics of trans-8'-apo-β-carotenal occurring on the picosecond time scale, after excitation in the S2 state. In a (slightly) polar solvent like chloroform, one-dimensional (T1D-IR) and two-dimensional (T2D-IR) transient infrared spectroscopy reveal spectral components with characteristic frequencies and lifetimes that are not observed in nonpolar solvents (cyclohexane). Combining experimental evidence with an analysis of CASPT2//CASSCF ground and excited state minima and energy profiles, complemented with TDDFT calculations in gas phase and in solvent, we propose a photochemical decay mechanism for this system where only the bright single-excited 1Bu(+) and the dark double-excited 2Ag(-) states are involved. Specifically, the initially populated 1Bu(+) relaxes toward 2Ag(-) in 200 fs. In a nonpolar solvent 2Ag(-) decays to the ground state (GS) in 25 ps. In polar solvents, distortions along twisting modes of the chain promote a repopulation of the 1Bu(+) state which then quickly relaxes to the GS (18 ps in chloroform). The 1Bu(+) state has a high electric dipole and is the main contributor to the charge-transfer state involved in the dynamics in polar solvents. The 2Ag(-) → 1Bu(+) population transfer is evidenced by a cross peak on the T2D-IR map revealing that the motions along the same stretching of the conjugated chain on the 2Ag(-) and 1Bu(+) states are coupled.
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Affiliation(s)
- Mariangela Di Donato
- LENS (European Laboratory for Nonlinear Spectroscopy) via N. Carrara 1, 50019 Sesto Fiorentino (FI), Italy
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