1
|
Polyakov NE, Mastova AV, Kruppa AI, Asfandiarov NL, Pshenichnyuk SA. Glycyrrhetinic acid interaction with solvated and free electrons studied by the CIDNP and dissociative electron attachment techniques. J Chem Phys 2024; 161:035102. [PMID: 39007395 DOI: 10.1063/5.0214342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Accepted: 07/01/2024] [Indexed: 07/16/2024] Open
Abstract
Electron transfer plays a crucial role in living systems, including the generation of reactive oxygen species (ROS). Oxygen acts as the terminal electron acceptor in the respiratory chains of aerobic organisms as well as in some photoinduced processes followed by the formation of ROS. This is why the participation of exogenous antioxidants in electron transfer processes in living systems is of particular interest. In the present study, using chemically induced dynamic nuclear polarization (CIDNP) and dissociative electron attachment (DEA) techniques, we have elucidated the affinity of solvated and free electrons to glycyrrhetinic acid (GA)-the aglicon of glycyrrhizin (the main active component of Licorice root). CIDNP is a powerful instrument to study the mechanisms of electron transfer reactions in solution, but the DEA technique shows its effectiveness in gas phase processes. For CIDNP experiments, the photoionization of the dianion of 5-sulfosalicylic acid (HSSA2-) was used as a model reaction of solvated electron generation. DEA experiments testify that GA molecules are even better electron acceptors than molecular oxygen, at least under gas-phase conditions. In addition, the effect of the solvent on the energetics of the reactants is discussed.
Collapse
Affiliation(s)
- Nikolay E Polyakov
- Voevodsky Institute of Chemical Kinetics and Combustion, Russian Academy of Sciences, Institutskaya Str. 3, 630090 Novosibirsk, Russia
| | - Anna V Mastova
- Voevodsky Institute of Chemical Kinetics and Combustion, Russian Academy of Sciences, Institutskaya Str. 3, 630090 Novosibirsk, Russia
| | - Alexander I Kruppa
- Voevodsky Institute of Chemical Kinetics and Combustion, Russian Academy of Sciences, Institutskaya Str. 3, 630090 Novosibirsk, Russia
| | - Nail L Asfandiarov
- Institute of Molecule and Crystal Physics, Ufa Federal Research Centre, Russian Academy of Sciences, Prospekt Oktyabrya 151, 450075 Ufa, Russia
| | - Stanislav A Pshenichnyuk
- Institute of Molecule and Crystal Physics, Ufa Federal Research Centre, Russian Academy of Sciences, Prospekt Oktyabrya 151, 450075 Ufa, Russia
| |
Collapse
|
2
|
van der Linde C, Ončák M, Cunningham EM, Tang WK, Siu CK, Beyer MK. Surface or Internal Hydration - Does It Really Matter? JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2023; 34:337-354. [PMID: 36744598 PMCID: PMC9983018 DOI: 10.1021/jasms.2c00290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 01/26/2023] [Accepted: 01/26/2023] [Indexed: 06/18/2023]
Abstract
The precise location of an ion or electron, whether it is internally solvated or residing on the surface of a water cluster, remains an intriguing question. Subtle differences in the hydrogen bonding network may lead to a preference for one or the other. Here we discuss spectroscopic probes of the structure of gas-phase hydrated ions in combination with quantum chemistry, as well as H/D exchange as a means of structure elucidation. With the help of nanocalorimetry, we look for thermochemical signatures of surface vs internal solvation. Examples of strongly size-dependent reactivity are reviewed which illustrate the influence of surface vs internal solvation on unimolecular rearrangements of the cluster, as well as on the rate and product distribution of ion-molecule reactions.
Collapse
Affiliation(s)
- Christian van der Linde
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020Innsbruck, Austria
| | - Milan Ončák
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020Innsbruck, Austria
| | - Ethan M. Cunningham
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020Innsbruck, Austria
| | - Wai Kit Tang
- Institute
of Research Management and Services (IPPP), Research and Innovation
Management Complex, University of Malaya, Kuala Lumpur50603, Malaysia
| | - Chi-Kit Siu
- Department
of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, PR China
| | - Martin K. Beyer
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020Innsbruck, Austria
| |
Collapse
|
3
|
Bachman B, Zhu D, Bandy J, Zhang L, Hamers RJ. Detection of Aqueous Solvated Electrons Produced by Photoemission from Solids Using Transient Absorption Measurements. ACS MEASUREMENT SCIENCE AU 2022; 2:46-56. [PMID: 36785590 PMCID: PMC9838729 DOI: 10.1021/acsmeasuresciau.1c00025] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Solvated electrons in water have long been of interest to chemists. While readily produced using intense multiphoton excitation of water and/or irradiation with high-energy particles, the possible role of solvated electrons in electrochemical and photoelectrochemical reactions at electrodes has been controversial. Recent studies showed that excitation of electrons to the conduction band of diamond leads to barrier-free emission of electrons into water. While these electrons can be inferred from the reactions they induce, direct detection by transient absorption measurements provides more direct evidence. Here, we present studies demonstrating direct detection of solvated electrons produced at diamond electrode surfaces and the influence of electrochemical potential and solution-phase electron scavengers. We further present a more detailed analysis of experimental conditions needed to detect solvated electrons emitted from diamond and other solid materials through transient optical absorption measurements.
Collapse
|
4
|
Kitajima K, Nakai Y, Sameera WMC, Tsuge M, Miyazaki A, Hidaka H, Kouchi A, Watanabe N. Delivery of Electrons by Proton-Hole Transfer in Ice at 10 K: Role of Surface OH Radicals. J Phys Chem Lett 2021; 12:704-710. [PMID: 33400539 DOI: 10.1021/acs.jpclett.0c03345] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Although water ice has been widely accepted to carry a positive charge via the transfer of excess protons through a hydrogen-bonded system, ice was recently found to be a negative charge conductor upon simultaneous exposure to electrons and ultraviolet photons at temperatures below 50 K. In this work, the mechanism of electron delivery was confirmed experimentally by both measuring currents through ice and monitoring photodissociated OH radicals on ice by using a novel method. The surface OH radicals significantly decrease upon the appearance of negative current flow, indicating that the electrons are delivered by proton-hole (OH-) transfer in ice triggered by OH- production on the surface. The mechanism of proton-hole transfer was rationalized by density functional theory calculations.
Collapse
Affiliation(s)
- Kensei Kitajima
- Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan
| | - Yoichi Nakai
- Radioactive Isotope Physics Laboratory, RIKEN Nishina Center, Saitama 351-0198, Japan
| | - W M C Sameera
- Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan
| | - Masashi Tsuge
- Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan
| | - Ayane Miyazaki
- Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan
| | - Hiroshi Hidaka
- Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan
| | - Akira Kouchi
- Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan
| | - Naoki Watanabe
- Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan
| |
Collapse
|
5
|
Signorell R. Electron Scattering in Liquid Water and Amorphous Ice: A Striking Resemblance. PHYSICAL REVIEW LETTERS 2020; 124:205501. [PMID: 32501058 DOI: 10.1103/physrevlett.124.205501] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 04/29/2020] [Indexed: 05/25/2023]
Abstract
The lack of accurate low-energy electron scattering cross sections for liquid water is a substantial source of uncertainty in the modeling of radiation chemistry and biology. The use of existing amorphous ice scattering cross sections for the lack of liquid data has been discussed controversially for decades. Here, we compare experimental photoemission data of liquid water with corresponding predictions using amorphous ice cross sections, with the aim of resolving the debate regarding the difference of electron scattering in liquid water and amorphous ice. We find very similar scattering properties in the liquid and the ice for electron kinetic energies up to a few hundred electron volts. The scattering cross sections recommended here for liquid water are an extension of the amorphous ice cross sections. Within the framework of currently available experimental data, our work answers one of the most debated questions regarding electron scattering in liquid water.
Collapse
Affiliation(s)
- Ruth Signorell
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
| |
Collapse
|
6
|
Abstract
Intriguing properties of photoemission from free, unsupported particles and droplets were predicted nearly 50 years ago, though experiments were a technical challenge. The last few decades have seen a surge of research in the field, due to advances in aerosol technology (generation, characterization, and transfer into vacuum), the development of photoelectron imaging spectrometers, and advances in vacuum ultraviolet and ultrafast light sources. Particles and droplets offer several advantages for photoemission studies. For example, photoemission spectra are dependent on the particle's size, shape, and composition, providing a wealth of information that allows for the retrieval of genuine electronic properties of condensed phase. In this review, with a focus on submicrometer-sized, dielectric particles and droplets, we explain the utility of photoemission from such systems, summarize several applications from the literature, and present some thoughts on future research directions.
Collapse
Affiliation(s)
- Loren Ban
- Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland;
| | - Bruce L Yoder
- Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland;
| | - Ruth Signorell
- Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland;
| |
Collapse
|
7
|
Hahn MB, Smales GJ, Seitz H, Solomun T, Sturm H. Ectoine interaction with DNA: influence on ultraviolet radiation damage. Phys Chem Chem Phys 2020; 22:6984-6992. [PMID: 32188961 DOI: 10.1039/d0cp00092b] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Ectoine is a small zwitterionic osmolyte and compatible solute, which does not interfere with cell metabolism even at molar concentrations. Plasmid DNA (pUC19) was irradiated with ultraviolet radiation (UV-C at 266 nm) under quasi physiological conditions (PBS) and in pure water in the presence and absence of ectoine (THP(B)) and hydroxyectoine (THP(A)). Different types of UV induced DNA damage were analysed: DNA single-strand breaks (SSBs), abasic sites and cyclobutane pyrimidine dimers (CPDs). A complex interplay between these factors was observed with respect to the nature and occurrence of DNA damage with 266 nm photons. In PBS, the cosolutes showed efficient protection against base damage, whilst in pure water, a dramatic shift from SSB damage to base damage was observed when cosolutes were added. To test whether these effects are caused by ectoine binding to DNA, further experiments were conducted: small-angle X-ray scattering (SAXS), surface-plasmon resonance (SPR) measurements and Raman spectroscopy. The results show, for the first time, a close interaction between ectoine and DNA. This is in stark contrast to the assumption made by preferential exclusion models, which are often used to interpret the behaviour of compatible solutes within cells and with biomolecules. It is tentatively proposed that the alterations of UV damage to DNA are attributed to ectoine influence on nucleobases through the direct interaction between ectoine and DNA.
Collapse
Affiliation(s)
- Marc Benjamin Hahn
- Freie Universität Berlin, Institut für Experimentalphysik, 14195 Berlin, Germany. and Bundesanstalt für Materialforschung und -prüfung (BAM), 12205 Berlin, Germany
| | - Glen J Smales
- Bundesanstalt für Materialforschung und -prüfung (BAM), 12205 Berlin, Germany
| | - Harald Seitz
- Universität Potsdam, Institut für Biochemie und Biologie, 14476 Potsdam, Germany and Fraunhofer Institute for Cell Therapy and Immunology, 14476 Potsdam, Germany
| | - Tihomir Solomun
- Bundesanstalt für Materialforschung und -prüfung (BAM), 12205 Berlin, Germany
| | - Heinz Sturm
- Bundesanstalt für Materialforschung und -prüfung (BAM), 12205 Berlin, Germany
| |
Collapse
|
8
|
Cheng M, Rivas N, Lim SJ, Pichugin K, Petruk AA, Klinkova A, Smith R, Hopkins WS, Sciaini G. Trapping a Photoelectron behind a Repulsive Coulomb Barrier in Solution. J Phys Chem Lett 2019; 10:5742-5747. [PMID: 31498643 DOI: 10.1021/acs.jpclett.9b01712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Multiply charged anions (MCAs) display unique photophysics and solvent-stabilizing effects. Well-known aqueous species such as SO42- and PO43- experience spontaneous electron detachment or charge-separation fragmentation in the gas phase owing to the strong Coulomb repulsion arising from the excess of negative charge. Thus, anions often present low photodetachment thresholds and the ability to quickly eject electrons into the solvent via charge-transfer-to-solvent (CTTS) states. Here, we report spectroscopic evidence for the existence of a repulsive Coulomb barrier (RCB) that blocks the ejection of "CTTS-like" electrons of the aqueous B12F122- dianion. Our spectroscopic experimental and theoretical studies indicate that despite the exerted Coulomb repulsion by the nascent radical monoanion B12F12-•aq, the photoexcited electron remains about the B12F12-• core. The RCB is an established feature of the potential energy landscape of MCAs in vacuo, which seems to extend to the liquid phase highlighting recent observations about the dielectric behavior of confined water.
Collapse
Affiliation(s)
- Meixin Cheng
- Department of Chemistry, and Waterloo Institute for Nanotechnology , University of Waterloo , 200 University Avenue W. , Waterloo , ON N2L 3G1 , Canada
| | - Nicolás Rivas
- Department of Chemistry, and Waterloo Institute for Nanotechnology , University of Waterloo , 200 University Avenue W. , Waterloo , ON N2L 3G1 , Canada
| | - Su Ji Lim
- Department of Chemistry, and Waterloo Institute for Nanotechnology , University of Waterloo , 200 University Avenue W. , Waterloo , ON N2L 3G1 , Canada
| | - Kostyantyn Pichugin
- Department of Chemistry, and Waterloo Institute for Nanotechnology , University of Waterloo , 200 University Avenue W. , Waterloo , ON N2L 3G1 , Canada
| | - Ariel A Petruk
- Department of Chemistry, and Waterloo Institute for Nanotechnology , University of Waterloo , 200 University Avenue W. , Waterloo , ON N2L 3G1 , Canada
| | - Anna Klinkova
- Department of Chemistry, and Waterloo Institute for Nanotechnology , University of Waterloo , 200 University Avenue W. , Waterloo , ON N2L 3G1 , Canada
| | - Rodney Smith
- Department of Chemistry, and Waterloo Institute for Nanotechnology , University of Waterloo , 200 University Avenue W. , Waterloo , ON N2L 3G1 , Canada
| | - W Scott Hopkins
- Department of Chemistry, and Waterloo Institute for Nanotechnology , University of Waterloo , 200 University Avenue W. , Waterloo , ON N2L 3G1 , Canada
| | - Germán Sciaini
- Department of Chemistry, and Waterloo Institute for Nanotechnology , University of Waterloo , 200 University Avenue W. , Waterloo , ON N2L 3G1 , Canada
| |
Collapse
|
9
|
Henley A, Patel AM, Parkes MA, Anderson JC, Fielding HH. Role of Photoisomerization on the Photodetachment of the Photoactive Yellow Protein Chromophore. J Phys Chem A 2018; 122:8222-8228. [PMID: 30234981 DOI: 10.1021/acs.jpca.8b07770] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The photocycle of photoactive yellow protein (PYP) is initiated by a photoinduced trans-cis isomerization around a C═C bond in the chromophore that lies at the heart of the protein; however, in addition to the desired photochemical pathway, the chromophore can undergo competing electronic relaxation processes. Here we combine gas-phase anion photoelectron spectroscopy and quantum chemistry calculations to investigate how locking the C═C bond in the chromophore controls the competition between these electronic relaxation processes following photoexcitation in the range 400-310 nm. We find evidence to suggest that preventing trans-cis isomerization effectively turns off internal conversion to the ground electronic state and enhances electron emission from the first electronically excited state.
Collapse
Affiliation(s)
- Alice Henley
- Department of Chemistry , University College London , London WC1H 0AJ , United Kingdom
| | - Anand M Patel
- Department of Chemistry , University College London , London WC1H 0AJ , United Kingdom
| | - Michael A Parkes
- Department of Chemistry , University College London , London WC1H 0AJ , United Kingdom
| | - James C Anderson
- Department of Chemistry , University College London , London WC1H 0AJ , United Kingdom
| | - Helen H Fielding
- Department of Chemistry , University College London , London WC1H 0AJ , United Kingdom
| |
Collapse
|
10
|
Kettner M, Zhou M, Brill J, Blom PWM, Weitz RT. Complete Suppression of Bias-Induced Threshold Voltage Shift below 273 K in Solution-Processed High-Performance Organic Transistors. ACS APPLIED MATERIALS & INTERFACES 2018; 10:35449-35454. [PMID: 30251831 DOI: 10.1021/acsami.8b13035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Despite their importance for future applications, the operational electrical stability of organic thin-film transistors is far from being understood. Even in the most stable organic field-effect transistors (OFETs) operated under vacuum, a hitherto unknown source leads to bias stress. Here, we investigate the electrical characteristics and operational stability of a high-performance diketopyrrolopyrrole- alt-terthiophene organic semiconductor. Even though the OFETs are characterized by a high mobility of 3 cm2 V-1 s-1 and trap-free transport, the threshold voltage shift in all stress modes remains sensitive to the presence of water even when operating devices in high vacuum. Exponential fitting from current bias-stress measurement up to 500 000 s showed a bias-voltage shift of <1 V, which corresponds to the density of the bias-induced trap states at infinite time NT∞ = 7.6 × 1010 cm-2. We have surprisingly found that electrical stress could be completely suppressed when devices are cooled to below 273 K. We present evidence that H3O+ and OH- stemming from the autoionization of liquid water is the hitherto unidentified universal trap (i.e., an extrinsic trap not stemming from the semiconductor itself) causing threshold voltage shift even in the otherwise stable devices. This interpretation would also clarify why in the literature similar NT have been reported in various semiconductors, suggesting that this number is independent of the organic semiconductor, processing and measurement environment but only dependent on residual contaminants-most notably water.
Collapse
Affiliation(s)
- Michel Kettner
- BASF SE, FET Systems , Carl-Bosch-Straße 38 , 67056 Ludwigshafen , Germany
- InnovationLab GmbH , Speyerer Str. 4 , 69115 Heidelberg , Germany
| | - Mi Zhou
- BASF SE, FET Systems , Carl-Bosch-Straße 38 , 67056 Ludwigshafen , Germany
- InnovationLab GmbH , Speyerer Str. 4 , 69115 Heidelberg , Germany
| | - Jochen Brill
- BASF SE, FET Systems , Carl-Bosch-Straße 38 , 67056 Ludwigshafen , Germany
- InnovationLab GmbH , Speyerer Str. 4 , 69115 Heidelberg , Germany
| | - Paul W M Blom
- Max-Planck-Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - R Thomas Weitz
- Physics of Nanosystems, Faculty of Physics , Ludwig-Maximilians University , Amalienstr. 54 , 80799 Munich , Germany
- Center for Nanoscience (CeNS) , Ludwig-Maximilians University Munich , Schellingstr. 4 , 80799 Munich , Germany
- Nanosystems Initiative Munich (NIM) , Schellingstr. 4 , 80799 Munich , Germany
| |
Collapse
|
11
|
Pshenichnyuk SA, Modelli A, Komolov AS. Interconnections between dissociative electron attachment and electron-driven biological processes. INT REV PHYS CHEM 2018. [DOI: 10.1080/0144235x.2018.1461347] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Stanislav A. Pshenichnyuk
- Institute of Molecule and Crystal Physics – Subdivision of the Ufa Research Centre of the Russian Academy of Sciences, Ufa, Russia
| | - Alberto Modelli
- Dipartimento di Chimica ‘G. Ciamician’, Università di Bologna, Bologna, Italy
- Centro Interdipartimentale di Ricerca in Scienze Ambientali, Ravenna, Italy
| | - Alexei S. Komolov
- Department of Solid State Electronics, St. Petersburg State University, St. Petersburg, Russia
| |
Collapse
|
12
|
Liu G, Landry C, Ghandi K. Prediction of rate constants of important chemical reactions in water radiation chemistry in sub and supercritical water – non-equilibrium reactions. CAN J CHEM 2018. [DOI: 10.1139/cjc-2017-0315] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The rate constants for reactions involved in the radiolysis of water under relevant thermodynamic conditions in supercritical water-cooled reactors are estimated for inputs in simulations of the radiation chemistry in Generation IV nuclear reactors. We have discussed the mechanism of each chemical reaction with a focus on non-equilibrium reactions. We found most of the reactions are activation controlled above the critical point and that the rate constants are not significantly pressure dependent below 300 °C. This work will aid industry with developing chemical control strategies to suppress the concentration of eroding species.
Collapse
Affiliation(s)
- Guangdong Liu
- Department of Physics, Mount Allison University, Sackville, NB E4L 1E2, Canada
| | - Cody Landry
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1E2, Canada
| | - Khashayar Ghandi
- Department of Physics, Mount Allison University, Sackville, NB E4L 1E2, Canada
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1E2, Canada
| |
Collapse
|
13
|
Park J, Song S, Yang Y, Kwon SH, Sim E, Kim YS. Identification of Droplet-Flow-Induced Electric Energy on Electrolyte–Insulator–Semiconductor Structure. J Am Chem Soc 2017; 139:10968-10971. [DOI: 10.1021/jacs.7b05030] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Junwoo Park
- Program
in Nano Science and Technology, Graduate School of Convergence Science
and Technology, Seoul National University, Seoul 08826, Korea
| | - Suhwan Song
- Department
of Chemistry, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
| | - YoungJun Yang
- Program
in Nano Science and Technology, Graduate School of Convergence Science
and Technology, Seoul National University, Seoul 08826, Korea
| | - Soon-Hyung Kwon
- Program
in Nano Science and Technology, Graduate School of Convergence Science
and Technology, Seoul National University, Seoul 08826, Korea
- Display
Materials and Components Research Center, Korea Electronics Technology Institute, Seongnam 13509, Korea
| | - Eunji Sim
- Department
of Chemistry, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
| | - Youn Sang Kim
- Program
in Nano Science and Technology, Graduate School of Convergence Science
and Technology, Seoul National University, Seoul 08826, Korea
- Advanced Institutes of Convergence Technology, 864-1 Iui-dong, Yeongtong-gu, Suwon-si, Gyeonggi-do 16229, Korea
| |
Collapse
|
14
|
Pohl MN, Richter C, Lugovoy E, Seidel R, Slavíček P, Aziz EF, Abel B, Winter B, Hergenhahn U. Sensitivity of Electron Transfer Mediated Decay to Ion Pairing. J Phys Chem B 2017; 121:7709-7714. [PMID: 28696722 DOI: 10.1021/acs.jpcb.7b06061] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ion pairing in electrolyte solutions remains a topic of discussion despite a long history of research. Very recently, nearest-neighbor mediated electronic de-excitation processes of core hole vacancies (electron transfer mediated decay, ETMD) were proposed to carry a spectral fingerprint of local solvation structure and in particular of contact ion pairs. Here, for the first time, we apply electron-electron coincidence detection to a liquid microjet, and record ETMD spectra of Li 1s vacancies in aqueous solutions of lithium chloride (LiCl) in direct comparison to lithium acetate (LiOAc). A change in the ETMD spectrum dependent on the electrolyte anion identity is observed for 4.5 M salt concentration. We discuss these findings within the framework of the formation and presence of contact ion pairs and the unique sensitivity of ETMD spectroscopy to ion pairing.
Collapse
Affiliation(s)
- Marvin N Pohl
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development , Albert-Einstein-Str. 15, 12489 Berlin, Germany.,Department of Physics, Freie Universität Berlin , Arnimallee 14, 14195 Berlin, Germany
| | - Clemens Richter
- Department of Physics, Freie Universität Berlin , Arnimallee 14, 14195 Berlin, Germany.,Leibniz Institute of Surface Modification (HZB-IOM Joint-Photonic Lab) , Permoserstr. 15, 04318 Leipzig, Germany
| | - Evgeny Lugovoy
- Leibniz Institute of Surface Modification (HZB-IOM Joint-Photonic Lab) , Permoserstr. 15, 04318 Leipzig, Germany
| | - Robert Seidel
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development , Albert-Einstein-Str. 15, 12489 Berlin, Germany
| | - Petr Slavíček
- Department of Physical Chemistry, University of Chemistry and Technology , Technická 5, 16628 Prague, Czech Republic
| | - Emad F Aziz
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development , Albert-Einstein-Str. 15, 12489 Berlin, Germany.,Department of Physics, Freie Universität Berlin , Arnimallee 14, 14195 Berlin, Germany.,School of Chemistry, Monash University , 3800 Clayton, Victoria, Australia
| | - Bernd Abel
- Leibniz Institute of Surface Modification (HZB-IOM Joint-Photonic Lab) , Permoserstr. 15, 04318 Leipzig, Germany.,Wilhelm-Ostwald-Institute for Physical and Theoretical Chemistry, University of Leipzig , Linnéstr. 2, 04103 Leipzig, Germany
| | - Bernd Winter
- Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development , Albert-Einstein-Str. 15, 12489 Berlin, Germany
| | - Uwe Hergenhahn
- Leibniz Institute of Surface Modification (HZB-IOM Joint-Photonic Lab) , Permoserstr. 15, 04318 Leipzig, Germany.,Max Planck Institute for Plasma Physics , Wendelsteinstr. 1, 17491 Greifswald, Germany
| |
Collapse
|
15
|
Affiliation(s)
- John M. Herbert
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210
| | - Marc P. Coons
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210
| |
Collapse
|
16
|
Luckhaus D, Yamamoto YI, Suzuki T, Signorell R. Genuine binding energy of the hydrated electron. SCIENCE ADVANCES 2017; 3:e1603224. [PMID: 28508051 PMCID: PMC5409453 DOI: 10.1126/sciadv.1603224] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 03/02/2017] [Indexed: 05/24/2023]
Abstract
The unknown influence of inelastic and elastic scattering of slow electrons in water has made it difficult to clarify the role of the solvated electron in radiation chemistry and biology. We combine accurate scattering simulations with experimental photoemission spectroscopy of the hydrated electron in a liquid water microjet, with the aim of resolving ambiguities regarding the influence of electron scattering on binding energy spectra, photoelectron angular distributions, and probing depths. The scattering parameters used in the simulations are retrieved from independent photoemission experiments of water droplets. For the ground-state hydrated electron, we report genuine values devoid of scattering contributions for the vertical binding energy and the anisotropy parameter of 3.7 ± 0.1 eV and 0.6 ± 0.2, respectively. Our probing depths suggest that even vacuum ultraviolet probing is not particularly surface-selective. Our work demonstrates the importance of quantitative scattering simulations for a detailed analysis of key properties of the hydrated electron.
Collapse
Affiliation(s)
- David Luckhaus
- Laboratory of Physical Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
| | - Yo-ichi Yamamoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-Ku, Kyoto 606-8502, Japan
| | - Toshinori Suzuki
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-Ku, Kyoto 606-8502, Japan
| | - Ruth Signorell
- Laboratory of Physical Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
| |
Collapse
|
17
|
Hartweg S, Yoder BL, Garcia GA, Nahon L, Signorell R. Size-Resolved Photoelectron Anisotropy of Gas Phase Water Clusters and Predictions for Liquid Water. PHYSICAL REVIEW LETTERS 2017; 118:103402. [PMID: 28339280 DOI: 10.1103/physrevlett.118.103402] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Indexed: 05/05/2023]
Abstract
We report the first measurements of size-resolved photoelectron angular distributions for the valence orbitals of neutral water clusters with up to 20 molecules. A systematic decrease of the photoelectron anisotropy is found for clusters with up to 5-6 molecules, and most remarkably, convergence of the anisotropy for larger clusters. We suggest the latter to be the result of a local short-range scattering potential that is fully described by a unit of 5-6 molecules. The cluster data and a detailed electron scattering model are used to predict the anisotropy of slow photoelectrons in liquid water. Reasonable agreement with experimental liquid jet data is found.
Collapse
Affiliation(s)
- Sebastian Hartweg
- Department of Chemistry and Applied Biosciences, Laboratory of Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
| | - Bruce L Yoder
- Department of Chemistry and Applied Biosciences, Laboratory of Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
| | - Gustavo A Garcia
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin BP 48, 91192 Gif sur Yvette, France
| | - Laurent Nahon
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin BP 48, 91192 Gif sur Yvette, France
| | - Ruth Signorell
- Department of Chemistry and Applied Biosciences, Laboratory of Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
| |
Collapse
|
18
|
Coons MP, You ZQ, Herbert JM. The Hydrated Electron at the Surface of Neat Liquid Water Appears To Be Indistinguishable from the Bulk Species. J Am Chem Soc 2016; 138:10879-86. [DOI: 10.1021/jacs.6b06715] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marc P. Coons
- Department of Chemistry and
Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Zhi-Qiang You
- Department of Chemistry and
Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - John M. Herbert
- Department of Chemistry and
Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| |
Collapse
|
19
|
Tong Y, Kampfrath T, Campen RK. Experimentally probing the libration of interfacial water: the rotational potential of water is stiffer at the air/water interface than in bulk liquid. Phys Chem Chem Phys 2016; 18:18424-30. [PMID: 27339861 DOI: 10.1039/c6cp01004k] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Most properties of liquid water are determined by its hydrogen-bond network. Because forming an aqueous interface requires termination of this network, one might expect the molecular level properties of interfacial water to markedly differ from water in bulk. Intriguingly, much prior experimental and theoretical work has found that, from the perspective of their time-averaged structure and picosecond structural dynamics, hydrogen-bonded OH groups at an air/water interface behave the same as hydrogen-bonded OH groups in bulk liquid water. Here we report the first experimental observation of interfacial water's libration (i.e. frustrated rotation) using the laser-based technique vibrational sum frequency spectroscopy. We find this mode has a frequency of 834 cm(-1), ≈165 cm(-1) higher than in bulk liquid water at the same temperature and similar to bulk ice. Because libration frequency is proportional to the stiffness of water's rotational potential, this increase suggests that one effect of terminating bulk water's hydrogen bonding network at the air/water interface is retarding rotation of water around intact hydrogen bonds. Because in bulk liquid water the libration plays a key role in stabilizing reaction intermediates and dissipating excess vibrational energy, we expect the ability to probe this mode in interfacial water to open new perspectives on the kinetics of heterogeneous reactions at aqueous interfaces.
Collapse
Affiliation(s)
- Yujin Tong
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany.
| | | | | |
Collapse
|
20
|
Effects of halide ions on the acceptor phase in spontaneous chemical oscillations in donor/membrane/acceptor systems. J Colloid Interface Sci 2016; 462:351-8. [DOI: 10.1016/j.jcis.2015.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Revised: 10/03/2015] [Accepted: 10/06/2015] [Indexed: 11/20/2022]
|
21
|
Chen H, Ruckenstein E. Hydrated Ions: From Individual Ions to Ion Pairs to Ion Clusters. J Phys Chem B 2015; 119:12671-6. [DOI: 10.1021/acs.jpcb.5b06837] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Houyang Chen
- Department of Chemical and
Biological Engineering, State University of New York at Buffalo, Buffalo, New York 14260-4200, United States
| | - Eli Ruckenstein
- Department of Chemical and
Biological Engineering, State University of New York at Buffalo, Buffalo, New York 14260-4200, United States
| |
Collapse
|
22
|
McWilliams LE, Valley NA, Wren SN, Richmond GL. A means to an interface: investigating monoethanolamine behavior at an aqueous surface. Phys Chem Chem Phys 2015. [PMID: 26220791 DOI: 10.1039/c5cp02931g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of amine scrubbers to trap carbon dioxide from flue gas streams is one of the most promising avenues for atmospheric carbon dioxide reduction. However, modifications are necessary to efficiently scale these scrubbers for use in fossil fuel plants. Current advances in tailoring amines for CO2 capture involve improvements of bulk kinetic and thermodynamic parameters, with little consideration to surface chemistry and behavior. Aqueous alkanolamine solutions, such as monoethanolamine (MEA), are currently highly favored sorbents in CO2 post-combustion capture. Although numerous studies have explored MEA-CO2 chemistry at the macroscopic scale, few have investigated the role of the interface in the gas adsorption process. Additionally, as these amines become more industrially ubiquitous, their presence on and the need to understand their behavior at atmospheric and environmental surfaces will increase. This study investigates the surface behavior of monoethanolamine at the vapor/water interface, with particular focus on MEA's surface orientation and footprint. Using vibrational sum frequency spectroscopy, surface tensiometry, and computational techniques, MEA is found to adopt a constrained gauche interfacial conformation with its methylene backbone oriented toward the vapor phase and its functional groups solvated in the bulk solution. Computational and experimental analysis agree well, giving a complete picture with vibrational mode assignments and surface orientation of MEA. These findings can assist in the tailoring of amine structures or to facilitate improvements in engineering design to exploit favorable surface chemistry, as well as to serve as a starting point toward understanding aqueous amine surface behavior relevant to environmental systems.
Collapse
|
23
|
Elkins MH, Williams HL, Neumark DM. Dynamics of electron solvation in methanol: Excited state relaxation and generation by charge-transfer-to-solvent. J Chem Phys 2015; 142:234501. [DOI: 10.1063/1.4922441] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Affiliation(s)
- Madeline H. Elkins
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Holly L. Williams
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Daniel M. Neumark
- Department of Chemistry, University of California, Berkeley, California 94720, USA
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| |
Collapse
|
24
|
Park J, Yang Y, Kwon SH, Kim YS. Influences of Surface and Ionic Properties on Electricity Generation of an Active Transducer Driven by Water Motion. J Phys Chem Lett 2015; 6:745-9. [PMID: 26262497 DOI: 10.1021/jz502613s] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In this Letter, we discuss the surface, ionic properties, and scale-up potential of an active transducer that generated electricity from natural water motion. When a liquid contacts a solid surface, an electrical double layer (EDL) is always formed at the solid/liquid interface. By modulating the EDL, the active transducer could generate a peak voltage of ∼3 V and a peak power of ∼5 μW. Interestingly, there were specific salinities of solution droplets that showed maximum performance and different characteristics according to the ions' nature. Analyzing the results macroscopically, we tried to figure out the origins of the active transducing precipitated by ions dynamics. Also, we demonstrated the scale-up potential for practical usage by multiple electrode design.
Collapse
Affiliation(s)
- Junwoo Park
- †Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 151-744, Republic of Korea
| | - YoungJun Yang
- †Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 151-744, Republic of Korea
| | - Soon-Hyung Kwon
- †Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 151-744, Republic of Korea
- ‡Flexible Display Research Center, Korea Electronics Technology Institute, Seongnam, Gyeonggi-do 463-816, Republic of Korea
| | - Youn Sang Kim
- †Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 151-744, Republic of Korea
- §Advanced Institutes of Convergence Technology, 864-1 Iui-dong, Yeongtong-gu, Suwon-si, Gyeonggi-do 443-270, Republic of Korea
| |
Collapse
|
25
|
On the electron affinity of cytosine in bulk water and at hydrophobic aqueous interfaces. J Mol Model 2014; 20:2453. [DOI: 10.1007/s00894-014-2453-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Accepted: 09/01/2014] [Indexed: 10/24/2022]
|
26
|
Ion Interactions with the Air–Water Interface Using a Continuum Solvent Model. J Phys Chem B 2014; 118:8700-10. [DOI: 10.1021/jp502887e] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
27
|
Plasmon-assisted radiolytic energy conversion in aqueous solutions. Sci Rep 2014; 4:5249. [PMID: 24918356 PMCID: PMC4052741 DOI: 10.1038/srep05249] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 05/14/2014] [Indexed: 11/23/2022] Open
Abstract
The field of conventional energy conversion using radioisotopes has almost exclusively focused on solid-state materials. Herein, we demonstrate that liquids can be an excellent media for effective energy conversion from radioisotopes. We also show that free radicals in liquid, which are continuously generated by beta radiation, can be utilized for electrical energy generation. Under beta radiation, surface plasmon obtained by the metallic nanoporous structures on TiO2 enhanced the radiolytic conversion via the efficient energy transfer between plasmons and free radicals. This work introduces a new route for the development of next-generation power sources.
Collapse
|
28
|
Piatkowski L, Zhang Z, Backus EHG, Bakker HJ, Bonn M. Extreme surface propensity of halide ions in water. Nat Commun 2014; 5:4083. [DOI: 10.1038/ncomms5083] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2013] [Accepted: 05/09/2014] [Indexed: 11/09/2022] Open
|
29
|
Elkins MH, Williams HL, Shreve AT, Neumark DM. Relaxation mechanism of the hydrated electron. Science 2014; 342:1496-9. [PMID: 24357314 DOI: 10.1126/science.1246291] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The relaxation dynamics of the photoexcited hydrated electron have been subject to conflicting interpretations. Here, we report time-resolved photoelectron spectra of hydrated electrons in a liquid microjet with the aim of clarifying ambiguities from previous experiments. A sequence of three ultrashort laser pulses (~100 femtosecond duration) successively created hydrated electrons by charge-transfer-to-solvent excitation of dissolved anions, electronically excited these electrons via the s→p transition, and then ejected them into vacuum. Two distinct transient signals were observed. One was assigned to the initially excited p-state with a lifetime of ~75 femtoseconds, and the other, with a lifetime of ~400 femtoseconds, was attributed to s-state electrons just after internal conversion in a nonequilibrated solvent environment. These assignments support the nonadiabatic relaxation model.
Collapse
Affiliation(s)
- Madeline H Elkins
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | | | | | | |
Collapse
|
30
|
Fedoseeva M, Fita P, Vauthey E. Excited-state dynamics of charged dyes at alkane/water interfaces in the presence of salts and ionic surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:14865-14872. [PMID: 24245476 DOI: 10.1021/la402191p] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The excited-state dynamics of the cationic dye malachite green (MG) and of the dianionic dye eosin B at the dodecane/water interface has been investigated using femtosecond time-resolved surface second harmonic generation (TR-SSHG). By using different probe wavelengths, the contributions of monomeric and aggregated MG to the signal could be spectroscopically distinguished. The effect of the addition of a small amount of surfactants was found to strongly depend on the relative charges of surfactant and dye. For surfactant/dye pairs with opposite charges, the TR-SSHG signal is dominated by the contribution from aggregates, whereas for pairs with the same charges, the signal intensity becomes vanishingly small. These effects are explained in terms of electrostatic interactions between surfactants and dyes that favor either attraction of the dye toward the interface or its repulsion toward the bulk. As a very similar behavior is observed with MG upon addition of NaSCN, we conclude that, in this case, this effect reflects the affinity of SCN¯ for the interface. On the other hand, the guanidinium cation was found to have a different effect than that of a positively charged surfactant on the SSHG signal of MG, indicating this cation does not accumulate in the interfacial region.
Collapse
Affiliation(s)
- Marina Fedoseeva
- Department of Physical Chemistry, University of Geneva , 30 Quai Ernest-Ansermet, Geneva, Switzerland
| | | | | |
Collapse
|