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Satapathy S, Khatoniar M, Parappuram DK, Liu B, John G, Feist J, Garcia-Vidal FJ, Menon VM. Selective isomer emission via funneling of exciton polaritons. SCIENCE ADVANCES 2021; 7:eabj0997. [PMID: 34714684 PMCID: PMC8555889 DOI: 10.1126/sciadv.abj0997] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 09/08/2021] [Indexed: 06/13/2023]
Abstract
Polaritons in organic systems has shown the potential to modify chemical properties and to mediate long-range energy transfer between individual chromophores, among other capabilities. Here, we demonstrate that strong coupling and formation of organic exciton-polaritons can be used to selectively tune the isomer emission of organic molecules. By taking advantage of their delocalized and hybrid character, polaritons emerging in the strong coupling regime open a new relaxation pathway that allows for an efficient funneling of the excitation between the molecular isomers. We implement this by strong coupling to trans-DCS (E-4-dimethylamino-4′cyanostilbene)molecules, which present two isomers in different amounts when immersed in a polymer matrix. Thanks to this new relaxation pathway, the photoexcitation that is first shared by the common polaritonic mode is then selectively funneled to the excited states of one of the isomers, recognizing pure emission from the isomeric states that do not contribute to emission under normal conditions.
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Affiliation(s)
- Sitakanta Satapathy
- Department of Physics, Center for Discovery and Innovation, City College of New York, City University of New York, 85 St. Nicholas Terrace, New York, NY 10031, USA
| | - Mandeep Khatoniar
- Department of Physics, Center for Discovery and Innovation, City College of New York, City University of New York, 85 St. Nicholas Terrace, New York, NY 10031, USA
- PhD Program in Physics, The Graduate Center, City University of New York, 365 5th Avenue, New York, NY, 10016, USA
| | - Divya K. Parappuram
- Department of Chemistry, Center for Discovery and Innovation, City College of New York, City University of New York, 85 St. Nicholas Terrace, New York, NY 10031, USA
| | - Bin Liu
- Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - George John
- Department of Chemistry, Center for Discovery and Innovation, City College of New York, City University of New York, 85 St. Nicholas Terrace, New York, NY 10031, USA
| | - Johannes Feist
- Departamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Francisco J. Garcia-Vidal
- Departamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Vinod M. Menon
- Department of Physics, Center for Discovery and Innovation, City College of New York, City University of New York, 85 St. Nicholas Terrace, New York, NY 10031, USA
- PhD Program in Physics, The Graduate Center, City University of New York, 365 5th Avenue, New York, NY, 10016, USA
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Zimányi L, Thekkan S, Eckert B, Condren AR, Dmitrenko O, Kuhn LR, Alabugin IV, Saltiel J. Determination of the p Ka Values of trans-Resveratrol, a Triphenolic Stilbene, by Singular Value Decomposition. Comparison with Theory. J Phys Chem A 2020; 124:6294-6302. [PMID: 32635729 DOI: 10.1021/acs.jpca.0c04792] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Several independent determinations of the pKa values of trans-resveratrol in water have led to conflicting results. Singular value decomposition analysis of UV absorption spectra of trans-resveratrol (t-Resv) in N2-outgased aqueous solutions buffered to pH values in the 7.0-13.6 range yielded the UV spectra of the three anionic forms and the corresponding pKa values: pKa1 = 9.16, pKa2 = 9.77, and pKa3 = 10.55 in very good agreement with calculated theoretical values. The analysis of the absorption spectra guided the assignment of the fluorescence spectrum of each anionic form. With the resolved spectra on hand, we applied the Förster equation to estimate pKa* values of 2.5 and 0, respectively, for the p- and m-OH substituents of t-Resv in S1. Theory supports a proposed mechanism for the reaction of t-Resv anions with O2.
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Affiliation(s)
- László Zimányi
- Institute of Biophysics, Biological Research Centre, P.O. Box 521, Szeged, Hungary H-6701
| | - Shareefa Thekkan
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Brett Eckert
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Alanna R Condren
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Olga Dmitrenko
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Leah R Kuhn
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Jack Saltiel
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
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Simkovitch R, Huppert D. Excited-State Proton Transfer in Resveratrol and Proposed Mechanism for Plant Resistance to Fungal Infection. J Phys Chem B 2015; 119:11684-94. [PMID: 26247232 DOI: 10.1021/acs.jpcb.5b06440] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Steady-state and time-resolved fluorescence techniques were employed to study the photophysics and photochemistry of trans-resveratrol. trans-Resveratrol is found in large quantities in fungi-infected grapevine-leaf tissue and plays a direct role in the resistance to plant disease. We found that trans-resveratrol in liquid solution undergoes a trans-cis isomerization process in the excited state at a rate that depends partially on the solvent viscosity, as was found in previous studies on trans-stilbene. The hydroxyl groups of the phenol moieties in resveratrol are weak photoacids. In water and methanol solutions containing weak bases such as acetate, a proton is transferred to the base within the lifetime of the excited state. When resveratrol is adsorbed on cellulose (also a component of the plant's cell wall), the cis-trans process is slow and the lifetime of the excited state increases from several tens of picoseconds in ethanol to about 1.5 ns. Excited-state proton transfer occurs when resveratrol is adsorbed on cellulose and acetate ions are in close proximity to the phenol moieties. We propose that proton transfer from excited resveratrol to the fungus acid-sensing chemoreceptor is one of the plant's resistance mechanisms to fungal infection.
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Affiliation(s)
- Ron Simkovitch
- Raymond and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University , Tel Aviv 69978, Israel
| | - Dan Huppert
- Raymond and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University , Tel Aviv 69978, Israel
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Resveratrol is not compatible with a Fura-2-based assay for measuring intracellular Ca2+ signaling. Biochem Biophys Res Commun 2014; 450:1626-30. [DOI: 10.1016/j.bbrc.2014.07.049] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Accepted: 07/10/2014] [Indexed: 11/23/2022]
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