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Datar A, Wright C, Matthews DA. Theoretical Investigation of the X-ray Stark Effect in Small Molecules. J Phys Chem A 2023; 127:1576-1587. [PMID: 36787229 DOI: 10.1021/acs.jpca.2c08311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
We have studied the Stark effect in the soft x-ray region for various small molecules by calculating the field-dependent x-ray absorption spectra. This effect is explained in terms of the response of molecular orbitals (core and valence), the molecular dipole moment, and the molecular geometry to the applied electric field. A number of consistent trends are observed linking the computed shifts in absorption energies and intensities with specific features of the molecular electronic structure. We find that both the virtual molecular orbitals (valence and/or Rydberg) as well as the core orbitals contribute to observed trends in a complementary fashion. This initial study highlights the potential impact of x-ray Stark spectroscopy as a tool to study electronic structure and environmental perturbations at a submolecular scale.
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Affiliation(s)
- Avdhoot Datar
- Department of Chemistry, Southern Methodist University, Dallas, Texas 75275, United States
| | - Catherine Wright
- Department of Chemistry, Southern Methodist University, Dallas, Texas 75275, United States
| | - Devin A Matthews
- Department of Chemistry, Southern Methodist University, Dallas, Texas 75275, United States
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2
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Braver Y, Valkunas L, Gelzinis A. Stark absorption and Stark fluorescence spectroscopies: Theory and simulations. J Chem Phys 2021; 155:244101. [PMID: 34972359 DOI: 10.1063/5.0073962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Stark spectroscopy experiments are widely used to study the properties of molecular systems, particularly those containing charge-transfer (CT) states. However, due to the small transition dipole moments and large static dipole moments of the CT states, the standard interpretation of the Stark absorption and Stark fluorescence spectra in terms of the Liptay model may be inadequate. In this work, we provide a theoretical framework for calculations of Stark absorption and Stark fluorescence spectra and propose new methods of simulations that are based on the quantum-classical theory. In particular, we use the forward-backward trajectory solution and a variant of the Poisson bracket mapping equation, which have been recently adapted for the calculation of conventional (field-free) absorption and fluorescence spectra. For comparison, we also apply the recently proposed complex time-dependent Redfield theory, while exact results are obtained using the hierarchical equations of motion approach. We show that the quantum-classical methods produce accurate results for a wide range of systems, including those containing CT states. The CT states contribute significantly to the Stark spectra, and the standard Liptay formalism is shown to be inapplicable for the analysis of spectroscopic data in those cases. We demonstrate that states with large static dipole moments may cause a pronounced change in the total fluorescence yield of the system in the presence of an external electric field. This effect is correctly captured by the quantum-classical methods, which should therefore prove useful for further studies of Stark spectra of real molecular systems. As an example, we calculate the Stark spectra for the Fenna-Matthews-Olson complex of green sulfur bacteria.
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Affiliation(s)
- Yakov Braver
- Faculty of Physics, Institute of Chemical Physics, Vilnius University, Saulėtekio Ave. 9-III, LT-10222 Vilnius, Lithuania and Department of Molecular Compound Physics, Center for Physical Sciences and Technology, Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
| | - Leonas Valkunas
- Faculty of Physics, Institute of Chemical Physics, Vilnius University, Saulėtekio Ave. 9-III, LT-10222 Vilnius, Lithuania and Department of Molecular Compound Physics, Center for Physical Sciences and Technology, Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
| | - Andrius Gelzinis
- Faculty of Physics, Institute of Chemical Physics, Vilnius University, Saulėtekio Ave. 9-III, LT-10222 Vilnius, Lithuania and Department of Molecular Compound Physics, Center for Physical Sciences and Technology, Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
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3
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Ara AM, Ahmed MK, D'Haene S, van Roon H, Ilioaia C, van Grondelle R, Wahadoszamen M. Absence of far-red emission band in aggregated core antenna complexes. Biophys J 2021; 120:1680-1691. [PMID: 33675767 DOI: 10.1016/j.bpj.2021.02.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 01/31/2021] [Accepted: 02/22/2021] [Indexed: 10/22/2022] Open
Abstract
Reported herein is a Stark fluorescence spectroscopy study performed on photosystem II core antenna complexes CP43 and CP47 in their native and aggregated states. The systematic mathematical modeling of the Stark fluorescence spectra with the aid of conventional Liptay formalism revealed that induction of aggregation in both the core antenna complexes via detergent removal results in a single quenched species characterized by a remarkably broad and inhomogenously broadened emission lineshape peaking around 700 nm. The quenched species possesses a fairly large magnitude of charge-transfer character. From the analogy with the results from aggregated peripheral antenna complexes, the quenched species is thought to originate from the enhanced chlorophyll-chlorophyll interaction due to aggregation. However, in contrast, aggregation of both core antenna complexes did not produce a far-red emission band at ∼730 nm, which was identified in most of the aggregated peripheral antenna complexes. The 730-nm emission band of the aggregated peripheral antenna complexes was attributed to the enhanced chlorophyll-carotenoid (lutein1) interaction in the terminal emitter locus. Therefore, it is very likely that the no occurrence of the far-red band in the aggregated core antenna complexes is directly related to the absence of lutein1 in their structures. The absence of the far-red band also suggests the possibility that aggregation-induced conformational change of the core antenna complexes does not yield a chlorophyll-carotenoid interaction associated energy dissipation channel.
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Affiliation(s)
- Anjue Mane Ara
- Biophysics of Photosynthesis, Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, Amsterdam, the Netherlands; Department of Physics, Jagannath University, Dhaka, Bangladesh
| | | | - Sandrine D'Haene
- Biophysics of Photosynthesis, Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, Amsterdam, the Netherlands
| | - Henny van Roon
- Biophysics of Photosynthesis, Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, Amsterdam, the Netherlands
| | - Cristian Ilioaia
- Institute for Integrative Biology of the Cell, CEA, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Rienk van Grondelle
- Biophysics of Photosynthesis, Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, Amsterdam, the Netherlands
| | - Md Wahadoszamen
- Biophysics of Photosynthesis, Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, Amsterdam, the Netherlands; Department of Physics, University of Dhaka, Dhaka, Bangladesh.
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Maduwantha K, Yamada S, Koswattage KR, Konno T, Hosokai T. Excited-State Dynamics of Room-Temperature Phosphorescent Organic Materials Based on Monobenzil and Bisbenzil Frameworks. MATERIALS (BASEL, SWITZERLAND) 2020; 13:ma13173904. [PMID: 32899342 PMCID: PMC7504296 DOI: 10.3390/ma13173904] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 08/28/2020] [Accepted: 08/28/2020] [Indexed: 06/11/2023]
Abstract
Room-temperature phosphorescent (RTP) materials have been attracting tremendous interest, owing to their unique material characteristics and potential applications for state-of-the-art optoelectronic devices. Recently, we reported the synthesis and fundamental photophysical properties of new RTP materials based on benzil, i.e., fluorinated monobenzil derivative and fluorinated and non-fluorinated bisbenzil derivative analogues [Yamada, S. et al., Beilstein J. Org. Chem. 2020, 16, 1154-1162.]. To deeply understand their RTP properties, we investigated the excited-state dynamics and photostability of the derivatives by means of time-resolved and steady-state photoluminescence spectroscopies. For these derivatives, clear RTP emissions with lifetimes on the microsecond timescale were identified. Among them, the monobenzil derivative was found to be the most efficient RTP material, showing both the longest lifetime and highest amplitude RTP emission. Time-resolved photoluminescence spectra, measured at 77 K, and density functional theory calculations revealed the existence of a second excited triplet state in the vicinity of the first excited singlet state for the monobenzil derivative, indicative of the presence of a fast intersystem crossing pathway. The correlation between the excited state dynamics, emission properties, and conformational flexibility of the three derivatives is discussed.
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Affiliation(s)
- Kaveendra Maduwantha
- Faculty of Graduate Studies, Sabaragamuwa University of Sri Lanka, P.O. Box 02, Belihuloya 70140, Sri Lanka;
- National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba 305-8565, Japan;
| | - Shigeyuki Yamada
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan; (S.Y.); (T.K.)
| | - Kaveenga Rasika Koswattage
- National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba 305-8565, Japan;
- Department of Engineering Technology, Faculty of Technology, Sabaragamuwa University of Sri Lanka, P.O. Box 02, Belihuloya 70140, Sri Lanka
| | - Tsutomu Konno
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan; (S.Y.); (T.K.)
| | - Takuya Hosokai
- National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba 305-8565, Japan;
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5
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Wahadoszamen M, Krüger TPJ, Ara AM, van Grondelle R, Gwizdala M. Charge transfer states in phycobilisomes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2020; 1861:148187. [PMID: 32173383 DOI: 10.1016/j.bbabio.2020.148187] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 02/17/2020] [Accepted: 03/09/2020] [Indexed: 10/24/2022]
Abstract
Phycobilisomes (PBs) absorb light and supply downstream photosynthetic processes with excitation energy in many cyanobacteria and algae. In response to a sudden increase in light intensity, excess excitation energy is photoprotectively dissipated in PBs by means of the orange carotenoid protein (OCP)-related mechanism or via a light-activated intrinsic decay channel. Recently, we have identified that both mechanisms are associated with far-red emission states. Here, we investigate the far-red states involved with the light-induced intrinsic mechanism by exploring the energy landscape and electro-optical properties of the pigments in PBs. While Stark spectroscopy showed that the far-red states in PBs exhibit a strong charge-transfer (CT) character at cryogenic temperatures, single molecule spectroscopy revealed that CT states should also be present at room temperature. Owing to the strong environmental sensitivity of CT states, the knowledge gained from this study may contribute to the design of a new generation of fluorescence markers.
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Affiliation(s)
- Md Wahadoszamen
- Department of Physics, University of Dhaka, Dhaka 1000, Bangladesh
| | - Tjaart P J Krüger
- Department of Physics, University of Pretoria, Pretoria 0023, South Africa
| | - Anjue Mane Ara
- Department of Physics, Jagannath University, Dhaka 1100, Bangladesh
| | - Rienk van Grondelle
- Faculty of Science, Vrije Universiteit Amsterdam, Amsterdam 1081 HV, the Netherlands
| | - Michal Gwizdala
- Department of Physics, University of Pretoria, Pretoria 0023, South Africa; Faculty of Science, Vrije Universiteit Amsterdam, Amsterdam 1081 HV, the Netherlands.
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6
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Ara AM, Shakil Bin Kashem M, van Grondelle R, Wahadoszamen M. Stark fluorescence spectroscopy on peridinin-chlorophyll-protein complex of dinoflagellate, Amphidinium carterae. PHOTOSYNTHESIS RESEARCH 2020; 143:233-239. [PMID: 31768715 DOI: 10.1007/s11120-019-00688-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Accepted: 10/30/2019] [Indexed: 06/10/2023]
Abstract
Because of their peculiar but intriguing photophysical properties, peridinin-chlorophyll-protein complexes (PCPs), the peripheral light-harvesting antenna complexes of photosynthetic dinoflagellates have been unique targets of multidimensional theoretical and experimental investigations over the last few decades. The major light-harvesting chlorophyll a (Chl a) pigments of PCP are hypothesized to be spectroscopically heterogeneous. To study the spectral heterogeneity in terms of electrostatic parameters, we, in this study, implemented Stark fluorescence spectroscopy on PCP isolated from the dinoflagellate Amphidinium carterae. The comprehensive theoretical modeling of the Stark fluorescence spectrum with the help of the conventional Liptay formalism revealed the simultaneous presence of three emission bands in the fluorescence spectrum of PCP recorded upon excitation of peridinin. The three emission bands are found to possess different sets of electrostatic parameters with essentially increasing magnitude of charge-transfer character from the blue to redder ones. The different magnitudes of electrostatic parameters give good support to the earlier proposition that the spectral heterogeneity in PCP results from emissive Chl a clusters anchored at a different sites and domains within the protein network.
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Affiliation(s)
- Anjue Mane Ara
- Biophysics of Photosynthesis, Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, Amsterdam, The Netherlands
- Department of Physics, Jagannath University, Dhaka, 1100, Bangladesh
| | | | - Rienk van Grondelle
- Biophysics of Photosynthesis, Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, Amsterdam, The Netherlands
| | - Md Wahadoszamen
- Biophysics of Photosynthesis, Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, Amsterdam, The Netherlands.
- Department of Physics, University of Dhaka, Dhaka, 1000, Bangladesh.
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7
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Rozental E, Altus E, Major DT, Hoz S. Shaping Polyyne Rods by Using an Electric Field. ChemistryOpen 2017; 6:733-738. [PMID: 29226061 PMCID: PMC5715300 DOI: 10.1002/open.201700132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Indexed: 01/09/2023] Open
Abstract
When a homogenous electric field is applied to polyynes (C10 and C20) perpendicular to their long axis, they bend to form an arch. The height of the arch is proportional to the intensity of the electric field. The direction of the bend and its magnitude depend on the electronic nature (donor/acceptor) of the substituents at the termini of the polyyne. The driving force for the formation of the arch is the dipole moment produced in the system parallel to the electric field. This dipole moment stems from the substituents and from additional polarization by the field. The bend of the linear polyyne fits a parabolic distortion. According to mechanical engineering analysis, this results from a moment that operates at the two end zones of the polyynes, in accordance with the natural bond order (NBO) charge distribution. It is shown that solutions relevant to beam deflection due to a central load or a uniformly distributed load are not satisfactory. Various parameters, such as the dipole moment and the height of the arch, are better correlated with σ than with σ+ or σ−. Application of the electric field to more complex systems enables the sculpting of interesting nanoshapes.
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Affiliation(s)
- Esther Rozental
- Department of Chemistry and the Institute for Nanotechnology and Advanced Materials Bar Ilan University Ramat Gan 5290002 Israel
| | - Eli Altus
- Department of Mechanical Engineering Technion Israel Institute of Technology Haifa 5290002 Israel
| | - Dan Thomas Major
- Department of Chemistry and the Institute for Nanotechnology and Advanced Materials Bar Ilan University Ramat Gan 5290002 Israel
| | - Shmaryahu Hoz
- Department of Chemistry and the Institute for Nanotechnology and Advanced Materials Bar Ilan University Ramat Gan 5290002 Israel
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8
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Wahadoszamen M, Belgio E, Rahman MA, Ara AM, Ruban AV, van Grondelle R. Identification and characterization of multiple emissive species in aggregated minor antenna complexes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2016; 1857:1917-1924. [PMID: 27666345 DOI: 10.1016/j.bbabio.2016.09.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 09/10/2016] [Accepted: 09/21/2016] [Indexed: 11/16/2022]
Abstract
Aggregation induced conformational change of light harvesting antenna complexes is believed to constitute one of the pathways through which photosynthetic organisms can safely dissipate the surplus of energy while exposed to saturating light. In this study, Stark fluorescence (SF) spectroscopy is applied to minor antenna complexes (CP24, CP26 and CP29) both in their light-harvesting and energy-dissipating states to trace and characterize different species generated upon energy dissipation through aggregation (in-vitro) induced conformational change. SF spectroscopy could identify three spectral species in the dissipative state of CP24, two in CP26 and only one in CP29. The comprehensive analysis of the SF spectra yielded different sets of molecular parameters for the multiple spectral species identified in CP24 or CP26, indicating the involvement of different pigments in their formation. Interestingly, a species giving emission around the 730nm spectral region is found to form in both CP24 and CP26 following transition to the energy dissipative state, but not in CP29. The SF analyses revealed that the far red species has exceptionally large charge transfer (CT) character in the excited state. Moreover, the far red species was found to be formed invariably in both Zeaxanthin (Z)- and Violaxathin (V)-enriched CP24 and CP26 antennas with identical CT character but with larger emission yield in Z-enriched ones. This suggests that the carotenoid Z is not directly involved but only confers an allosteric effect on the formation of the far red species. Similar far red species with remarkably large CT character were also observed in the dissipative state of the major light harvesting antenna (LHCII) of plants [Wahadoszamen et al. PCCP, 2012], the fucoxanthin-chlorophyll protein (FCP) of brown algae [Wahadoszamen et al. BBA, 2014] and cyanobacterial IsiA [Wahadoszamen et al. BBA, 2015], thus pointing to identical sites and pigments active in the formation of the far red quenching species in different organisms.
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Affiliation(s)
- Md Wahadoszamen
- Biophysics of Photosynthesis, Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, The Netherlands; Department of Physics, University of Dhaka, Dhaka 1000, Bangladesh.
| | - Erica Belgio
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Opatovický mlýn, 379 81 Třeboň, Czech Republic; School of Biological and Chemical Sciences, Department of Cell and Molecular Biology, Queen Mary University of London
| | - Md Ashiqur Rahman
- Department of Physics, Khulna University of Engineering and Technology (KUET), Khulna 9203, Bangladesh
| | - Anjue Mane Ara
- Department of Physics, Jagannath University, Dhaka 1100, Bangladesh
| | - Alexander V Ruban
- School of Biological and Chemical Sciences, Department of Cell and Molecular Biology, Queen Mary University of London
| | - Rienk van Grondelle
- Biophysics of Photosynthesis, Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, The Netherlands.
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Wahadoszamen M, D'Haene S, Ara AM, Romero E, Dekker JP, Grondelle RV, Berera R. Identification of common motifs in the regulation of light harvesting: The case of cyanobacteria IsiA. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2015; 1847:486-492. [PMID: 25615585 DOI: 10.1016/j.bbabio.2015.01.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 11/27/2014] [Accepted: 01/12/2015] [Indexed: 10/24/2022]
Abstract
When cyanobacteria are grown under iron-limited or other oxidative stress conditions the iron stress inducible pigment-protein IsiA is synthesized in variable amounts. IsiA accumulates in aggregates inside the photosynthetic membrane that strongly dissipate chlorophyll excited state energy. In this paper we applied Stark fluorescence (SF) spectroscopy at 77K to IsiA aggregates to gain insight into the nature of the emitting and energy dissipating state(s). Our study shows that two emitting states are present in the system, one emitting at 684 nm and the other emitting at about 730 nm. The new 730 nm state exhibits strongly reduced fluorescence (F) together with a large charge transfer character. We discuss these findings in the light of the energy dissipation mechanisms involved in the regulation of photosynthesis in plants, cyanobacteria and diatoms. Our results suggest that photosynthetic organisms have adopted common mechanisms to cope with the deleterious effects of excess light under unfavorable growth conditions.
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Affiliation(s)
- Md Wahadoszamen
- Biophysics of Photosynthesis/Physics of Energy, Department of Physics Astronomy, Faculty of Sciences, VU University Amsterdam, The Netherlands; Department of Physics, University of Dhaka, Dhaka 1000, Bangladesh.
| | - Sandrine D'Haene
- Biophysics of Photosynthesis/Physics of Energy, Department of Physics Astronomy, Faculty of Sciences, VU University Amsterdam, The Netherlands
| | - Anjue Mane Ara
- Biophysics of Photosynthesis/Physics of Energy, Department of Physics Astronomy, Faculty of Sciences, VU University Amsterdam, The Netherlands; Department of Physics, Jagannath University, Dhaka 1100, Bangladesh
| | - Elisabet Romero
- Biophysics of Photosynthesis/Physics of Energy, Department of Physics Astronomy, Faculty of Sciences, VU University Amsterdam, The Netherlands
| | - Jan P Dekker
- Biophysics of Photosynthesis/Physics of Energy, Department of Physics Astronomy, Faculty of Sciences, VU University Amsterdam, The Netherlands
| | - Rienk van Grondelle
- Biophysics of Photosynthesis/Physics of Energy, Department of Physics Astronomy, Faculty of Sciences, VU University Amsterdam, The Netherlands
| | - Rudi Berera
- Biophysics of Photosynthesis/Physics of Energy, Department of Physics Astronomy, Faculty of Sciences, VU University Amsterdam, The Netherlands.
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Wahadoszamen M, Margalit I, Ara AM, van Grondelle R, Noy D. The role of charge-transfer states in energy transfer and dissipation within natural and artificial bacteriochlorophyll proteins. Nat Commun 2014; 5:5287. [PMID: 25342121 PMCID: PMC4255223 DOI: 10.1038/ncomms6287] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 09/17/2014] [Indexed: 11/23/2022] Open
Abstract
Understanding how specific protein environments affect the mechanisms of non-radiative energy dissipation within densely assembled chlorophylls in photosynthetic protein complexes is of great interest to the construction of bioinspired solar energy conversion devices. Mixing of charge-transfer and excitonic states in excitonically interacting chlorophylls was implicated in shortening excited states lifetimes but its relevance to active control of energy dissipation in natural systems is under considerable debate. Here we show that the degree of fluorescence quenching in two similar pairs of excitonically interacting bacteriochlorophyll derivatives is directly associated with increasing charge transfer character in the excited state, and that the protein environment may control non-radiative dissipation by affecting the mixing of charge transfer and excitonic states. The capability of local protein environments to determine the fate of excited states, and thereby to confer different functionalities to excitonically coupled dimers substantiates the dimer as the basic functional element of photosynthetic enzymes.
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Affiliation(s)
- Md Wahadoszamen
- 1] Section of Biophysics, Department of Physics and Astronomy, VU University Amsterdam, Amsterdam 1081 HV, The Netherlands [2] Department of Physics, University of Dhaka, Dhaka 1000, Bangladesh
| | - Iris Margalit
- 1] Plant Sciences Department, Weizmann Institute of Science, Rehovot 7610001, Israel [2] Migal-Galilee Research Institute, Kiryat-Shmona 1101602, Israel
| | - Anjue Mane Ara
- 1] Section of Biophysics, Department of Physics and Astronomy, VU University Amsterdam, Amsterdam 1081 HV, The Netherlands [2] Department of Physics, Jagannath University, Dhaka 1100, Bangladesh
| | - Rienk van Grondelle
- Section of Biophysics, Department of Physics and Astronomy, VU University Amsterdam, Amsterdam 1081 HV, The Netherlands
| | - Dror Noy
- Migal-Galilee Research Institute, Kiryat-Shmona 1101602, Israel
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11
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Wahadoszamen M, Ghazaryan A, Cingil HE, Ara AM, Büchel C, van Grondelle R, Berera R. Stark fluorescence spectroscopy reveals two emitting sites in the dissipative state of FCP antennas. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2013; 1837:193-200. [PMID: 24036191 DOI: 10.1016/j.bbabio.2013.09.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 08/31/2013] [Accepted: 09/04/2013] [Indexed: 10/26/2022]
Abstract
Diatoms are characterized by very efficient photoprotective mechanisms where the excess energy is dissipated as heat in the main antenna system constituted by fucoxanthin-chlorophyll (Chl) protein complexes (FCPs). We performed Stark fluorescence spectroscopy on FCPs in their light-harvesting and energy dissipating states. Our results show that two distinct emitting bands are created upon induction of energy dissipation in FCPa and possibly in FCPb. More specifically one band is characterized by broad red shifted emission above 700nm and bears strong similarity with a red shifted band that we detected in the dissipative state of the major light-harvesting complex II (LHCII) of plants [26]. We discuss the results in the light of different mechanisms proposed to be responsible for photosynthetic photoprotection.
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Affiliation(s)
- Md Wahadoszamen
- Division of Physics and Astronomy, Department of Biophysics, VU University Amsterdam, The Netherlands; Department of Physics, University of Dhaka, Dhaka 1000, Bangladesh.
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12
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Maity SK, Bera S, Paikar A, Pramanik A, Haldar D. Halogen bond induced phosphorescence of capped γ-amino acid in the solid state. Chem Commun (Camb) 2013; 49:9051-3. [DOI: 10.1039/c3cc44231d] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Sebree JA, Zwier TS. The excited states and vibronic spectroscopy of diphenyldiacetylene and diphenylvinylacetylene. Phys Chem Chem Phys 2012; 14:173-83. [DOI: 10.1039/c1cp22857a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Wahadoszamen M, Berera R, Ara AM, Romero E, van Grondelle R. Identification of two emitting sites in the dissipative state of the major light harvesting antenna. Phys Chem Chem Phys 2011; 14:759-66. [PMID: 22120671 DOI: 10.1039/c1cp23059j] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In order to cope with the deleterious effects of excess light, photosynthetic organisms have developed remarkable strategies where the excess energy is dissipated as heat by the antenna system. In higher plants one main player in the process is the major light harvesting antenna of Photosystem II (PSII), LHCII. In this paper we applied Stark fluorescence spectroscopy to LHCII in different quenching states to investigate the possible contribution of charge-transfer states to the quenching. We find that in the quenched state the fluorescence displays a remarkable sensitivity to the applied electric field. The resulting field-induced emission spectra reveal the presence of two distinct energy dissipating sites both characterized by a strong but spectrally very different response to the applied electric field. We propose the two states to originate from chlorophyll-chlorophyll and chlorophyll-carotenoid charge transfer interactions coupled to the chlorophyll exciton state in the terminal emitter locus and discuss these findings in the light of the different models proposed to be responsible for energy dissipation in photosynthesis.
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Affiliation(s)
- Md Wahadoszamen
- Division of Physics and Astronomy, Department of Biophysics, VU University Amsterdam, Amsterdam, The Netherlands.
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15
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Ma X, Yan L, Wang X, Guo Q, Xia A. Spectral and intramolecular charge transfer properties in terminal donor/acceptor-substituted all-trans-α,ω-diphenylpolyenes and α,ω-diphenylpolyynes. Phys Chem Chem Phys 2011; 13:17273-83. [DOI: 10.1039/c1cp21036j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Deperasińska I, Szemik-Hojniak A, Osowska K, Rode M, Szczepanik A, Wiśniewski Ł, Lis T, Szafert S. Synthesis, photophysics and excited state structure of 1,8-di(p-tolyl)-1,3,5,7-octatetrayne. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2010.10.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Cataldo F, Ravagnan L, Cinquanta E, Castelli IE, Manini N, Onida G, Milani P. Synthesis, Characterization, and Modeling of Naphthyl-Terminated sp Carbon Chains: Dinaphthylpolyynes. J Phys Chem B 2010; 114:14834-41. [DOI: 10.1021/jp104863v] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Franco Cataldo
- Actinium Chemical Research, Via Casilina 1626/A, I-00133 Rome, Italy, Istituto Nazionale di Astrofisica. Osservatorio Astrofisica di Catania, Via S. Sofia 78, I-95123 Catania, Italy, Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy, CIMAINA, Via Celoria 16, I-20133 Milano, Italy, Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, Via Cozzi 53, I-20125 Milano, Italy, and European Theoretical Spectroscopy Facility (ETSF), Via
| | - Luca Ravagnan
- Actinium Chemical Research, Via Casilina 1626/A, I-00133 Rome, Italy, Istituto Nazionale di Astrofisica. Osservatorio Astrofisica di Catania, Via S. Sofia 78, I-95123 Catania, Italy, Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy, CIMAINA, Via Celoria 16, I-20133 Milano, Italy, Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, Via Cozzi 53, I-20125 Milano, Italy, and European Theoretical Spectroscopy Facility (ETSF), Via
| | - Eugenio Cinquanta
- Actinium Chemical Research, Via Casilina 1626/A, I-00133 Rome, Italy, Istituto Nazionale di Astrofisica. Osservatorio Astrofisica di Catania, Via S. Sofia 78, I-95123 Catania, Italy, Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy, CIMAINA, Via Celoria 16, I-20133 Milano, Italy, Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, Via Cozzi 53, I-20125 Milano, Italy, and European Theoretical Spectroscopy Facility (ETSF), Via
| | - Ivano Eligio Castelli
- Actinium Chemical Research, Via Casilina 1626/A, I-00133 Rome, Italy, Istituto Nazionale di Astrofisica. Osservatorio Astrofisica di Catania, Via S. Sofia 78, I-95123 Catania, Italy, Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy, CIMAINA, Via Celoria 16, I-20133 Milano, Italy, Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, Via Cozzi 53, I-20125 Milano, Italy, and European Theoretical Spectroscopy Facility (ETSF), Via
| | - Nicola Manini
- Actinium Chemical Research, Via Casilina 1626/A, I-00133 Rome, Italy, Istituto Nazionale di Astrofisica. Osservatorio Astrofisica di Catania, Via S. Sofia 78, I-95123 Catania, Italy, Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy, CIMAINA, Via Celoria 16, I-20133 Milano, Italy, Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, Via Cozzi 53, I-20125 Milano, Italy, and European Theoretical Spectroscopy Facility (ETSF), Via
| | - Giovanni Onida
- Actinium Chemical Research, Via Casilina 1626/A, I-00133 Rome, Italy, Istituto Nazionale di Astrofisica. Osservatorio Astrofisica di Catania, Via S. Sofia 78, I-95123 Catania, Italy, Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy, CIMAINA, Via Celoria 16, I-20133 Milano, Italy, Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, Via Cozzi 53, I-20125 Milano, Italy, and European Theoretical Spectroscopy Facility (ETSF), Via
| | - Paolo Milani
- Actinium Chemical Research, Via Casilina 1626/A, I-00133 Rome, Italy, Istituto Nazionale di Astrofisica. Osservatorio Astrofisica di Catania, Via S. Sofia 78, I-95123 Catania, Italy, Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy, CIMAINA, Via Celoria 16, I-20133 Milano, Italy, Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, Via Cozzi 53, I-20125 Milano, Italy, and European Theoretical Spectroscopy Facility (ETSF), Via
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Rampon DS, Rodembusch FS, Schneider JMFM, Bechtold IH, Gonçalves PFB, Merlo AA, Schneider PH. Novel selenoesters fluorescent liquid crystalline exhibiting a rich phase polymorphism. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b917366h] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hong Y, Lam JWY, Tang BZ. Aggregation-induced emission: phenomenon, mechanism and applications. Chem Commun (Camb) 2009:4332-53. [DOI: 10.1039/b904665h] [Citation(s) in RCA: 3109] [Impact Index Per Article: 207.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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