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Clark JA, Robinson S, Espinoza EM, Bao D, Derr JB, Croft L, O'Mari O, Grover WH, Vullev VI. Poly(dimethylsiloxane) as a room-temperature solid solvent for photophysics and photochemistry. Phys Chem Chem Phys 2024; 26:8062-8076. [PMID: 38372740 DOI: 10.1039/d3cp05413f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Medium viscosity strongly affects the dynamics of solvated species and can drastically alter the deactivation pathways of their excited states. This study demonstrates the utility of poly(dimethylsiloxane) (PDMS) as a room-temperature solid-state medium for optical spectroscopy. As a thermoset elastic polymer, PDMS is transparent in the near ultraviolet, visible, and near infrared spectral regions. It is easy to mould into any shape, forming surfaces with a pronounced smoothness. While PDMS is broadly used for the fabrication of microfluidic devices, it swells in organic solvents, presenting severe limitations for the utility of such devices for applications employing non-aqueous fluids. Nevertheless, this swelling is reversible, which proves immensely beneficial for loading samples into the PDMS solid matrix. Transferring molecular-rotor dyes (used for staining prokaryotic cells and amyloid proteins) from non-viscous solvents into PDMS induces orders-of-magnitude enhancement of their fluorescence quantum yield and excited-state lifetimes, providing mechanistic insights about their deactivation pathways. These findings demonstrate the unexplored potential of PDMS as a solid solvent for optical applications.
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Affiliation(s)
- John A Clark
- Department of Bioengineering, University of California, Riverside, CA 92521, USA.
| | - Samantha Robinson
- Department of Bioengineering, University of California, Riverside, CA 92521, USA.
| | - Eli M Espinoza
- Department of Chemistry, University of California, Riverside, CA 92521, USA
| | - Duoduo Bao
- Department of Bioengineering, University of California, Riverside, CA 92521, USA.
| | - James B Derr
- Department of Biochemistry, University of California, Riverside, CA 92521, USA
| | - Luca Croft
- Department of Bioengineering, University of California, Riverside, CA 92521, USA.
| | - Omar O'Mari
- Department of Bioengineering, University of California, Riverside, CA 92521, USA.
| | - William H Grover
- Department of Bioengineering, University of California, Riverside, CA 92521, USA.
| | - Valentine I Vullev
- Department of Bioengineering, University of California, Riverside, CA 92521, USA.
- Department of Chemistry, University of California, Riverside, CA 92521, USA
- Department of Biochemistry, University of California, Riverside, CA 92521, USA
- Materials Science and Engineering Program, University of California, Riverside, CA 92521, USA
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Hupfer ML, Dellith J, Seyring M, Diegel M, Dellith A, Ghosh S, Rettenmayr M, Dietzek-Ivanšić B, Presselt M. Bifacial Dye Membranes: Ultrathin and Free-Standing although not Being Covalently Bound. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2204874. [PMID: 36300596 DOI: 10.1002/adma.202204874] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 10/04/2022] [Indexed: 06/16/2023]
Abstract
Layers of aligned dyes are key to photo-driven charge separation in dye sensitized solar cells, but cannot be exploited as rectifying membranes in photocatalysis to separate half-cells because they are not sufficiently stable. While impressive work on the fabrication of stable noncovalent membranes has been recently demonstrated, these membranes are inherently suffering from non-uniform orientation of the constituting dyes. To stabilize layers made from uniformly assembled and aligned dyes, they can be covalently cross-linked via functional groups or via chromophores at the expense of their optical properties. Here stable membranes from established dyes are reported that do not need to be elaborately functionalized nor do their chromophores need to be destroyed. These membranes are free-standing, although being only non-covalently linked. To enable uniform dye-alignment, Langmuir layers made from linear, water-insoluble dyes are used. That water-soluble charge transfer dyes adsorb onto and intercalate into the Langmuir layer from the aqueous subphase, thus yielding free-standing, molecularly thin membranes are demonstrated. The developed bifacial layers consist almost entirely of π-conjugated units and thus can conduct charges and can be further engineered for optoelectronic and photocatalytic applications.
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Affiliation(s)
- Maximilian L Hupfer
- Leibniz Institute of Photonic Technology (Leibniz-IPHT), Albert-Einstein-Str. 9, 07745, Jena, Germany
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743, Jena, Germany
| | - Jan Dellith
- Leibniz Institute of Photonic Technology (Leibniz-IPHT), Albert-Einstein-Str. 9, 07745, Jena, Germany
| | - Martin Seyring
- Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Löbdergraben 32, 07743, Jena, Germany
| | - Marco Diegel
- Leibniz Institute of Photonic Technology (Leibniz-IPHT), Albert-Einstein-Str. 9, 07745, Jena, Germany
| | - Andrea Dellith
- Leibniz Institute of Photonic Technology (Leibniz-IPHT), Albert-Einstein-Str. 9, 07745, Jena, Germany
| | - Soumik Ghosh
- Leibniz Institute of Photonic Technology (Leibniz-IPHT), Albert-Einstein-Str. 9, 07745, Jena, Germany
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743, Jena, Germany
- Sciclus GmbH & Co. KG, Moritz-von-Rohr-Str. 1a, 07745, Jena, Germany
| | - Markus Rettenmayr
- Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Löbdergraben 32, 07743, Jena, Germany
| | - Benjamin Dietzek-Ivanšić
- Leibniz Institute of Photonic Technology (Leibniz-IPHT), Albert-Einstein-Str. 9, 07745, Jena, Germany
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743, Jena, Germany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743, Jena, Germany
| | - Martin Presselt
- Leibniz Institute of Photonic Technology (Leibniz-IPHT), Albert-Einstein-Str. 9, 07745, Jena, Germany
- Sciclus GmbH & Co. KG, Moritz-von-Rohr-Str. 1a, 07745, Jena, Germany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743, Jena, Germany
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Manandhar P, Vokatá T, Lee S, Lee Y, Jung HM, Shim S, Moon JH. Controlled ionic complexation of positively charged phenylene‐based conjugated polymers by modulated backbone structures. POLYM INT 2018. [DOI: 10.1002/pi.5686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Prakash Manandhar
- Department of Chemistry and Biochemistry Florida International University Miami FL USA
| | - Tereza Vokatá
- Department of Chemistry and Biochemistry Florida International University Miami FL USA
| | - Sunyoung Lee
- Department of Applied Chemistry Kumoh National Institute of Technology Gumi South Korea
| | - Yejin Lee
- Department of Chemistry Sunchon National University Suncheon South Korea
| | - Hyun Min Jung
- Department of Applied Chemistry Kumoh National Institute of Technology Gumi South Korea
| | - Sangdeok Shim
- Department of Chemistry Sunchon National University Suncheon South Korea
| | - Joong Ho Moon
- Department of Chemistry and Biochemistry Florida International University Miami FL USA
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Kaerkitcha N, Sagawa T. Highly Efficient Fluorescence Resonance Energy Transfer in Electrospun Nanofibers Containing Pyrene and Porphyrin. CHEM LETT 2018. [DOI: 10.1246/cl.180177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Navaporn Kaerkitcha
- Graduate School of Energy Science, Kyoto University, Sakyo, Kyoto 606-8501, Japan
| | - Takashi Sagawa
- Graduate School of Energy Science, Kyoto University, Sakyo, Kyoto 606-8501, Japan
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Kaerkitcha N, Sagawa T. Amplified polarization properties of electrospun nanofibers containing fluorescent dyes and helical polymer. Photochem Photobiol Sci 2018; 17:342-351. [DOI: 10.1039/c7pp00413c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Well-aligned nanofibers containing cationic fluorescent dyes and anionic chiral polymers prepared via electrospinning exhibit an enhanced circular dichroism, which is mainly caused by linear dichroism and linear birefringence.
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Affiliation(s)
- N. Kaerkitcha
- Graduate School of Energy Science
- Kyoto University
- Kyoto 606-8501
- Japan
| | - T. Sagawa
- Graduate School of Energy Science
- Kyoto University
- Kyoto 606-8501
- Japan
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