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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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Ünsalan O, Kuş N, Jarmelo S, Fausto R. Trans- and cis-stilbene isolated in cryogenic argon and xenon matrices. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 136 Pt A:81-94. [PMID: 24211173 DOI: 10.1016/j.saa.2013.10.050] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 08/30/2013] [Accepted: 10/10/2013] [Indexed: 06/02/2023]
Abstract
Monomers of trans- (TS) and cis-stilbene (CS) were isolated in cryogenic argon and xenon matrices, and their infrared (IR) spectra were fully assigned and interpreted. The interpretation of the vibrational spectra received support from theoretical calculations undertaken at the DFT(B3LYP)/6-311++G(d,p) level of theory. In situ broadband UV irradiation of the matrix-isolated CS led to its isomerization to TS, which appeared in the photolysed matrices in both non-planar and planar configurations. The non-planar species was found to convert into the more stable planar form upon subsequent annealing of the matrices at higher temperature. TS was found to be photostable under the used experimental conditions. The structure of the non-planar TS form was assigned based on the comparison of its observed IR spectrum with those theoretically predicted for different conformations of TS. Chemometrics was used to make this assignment. Additional reasoning on the structure of the studied stilbenes is presented taking as basis results of the Natural Bond Orbital analysis.
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Affiliation(s)
- Ozan Ünsalan
- Department of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal; Department of Physics, Faculty of Sciences, University of Istanbul, Turkey
| | - Nihal Kuş
- Department of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal; Department of Physics, Anadolu University, Eskişehir, Turkey
| | - Susana Jarmelo
- Department of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal
| | - Rui Fausto
- Department of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal.
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