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  1. Article ; Online: Unified picture of vibrational relaxation of OH stretch at the air/water interface.

    Sung, Woongmo / Inoue, Ken-Ichi / Nihonyanagi, Satoshi / Tahara, Tahei

    Nature communications

    2024  Volume 15, Issue 1, Page(s) 1258

    Abstract: The elucidation of the energy dissipation process is crucial for understanding various phenomena occurring in nature. Yet, the vibrational relaxation and its timescale at the water interface, where the hydrogen-bonding network is truncated, are not well ... ...

    Abstract The elucidation of the energy dissipation process is crucial for understanding various phenomena occurring in nature. Yet, the vibrational relaxation and its timescale at the water interface, where the hydrogen-bonding network is truncated, are not well understood and are still under debate. In the present study, we focus on the OH stretch of interfacial water at the air/water interface and investigate its vibrational relaxation by femtosecond time-resolved, heterodyne-detected vibrational sum-frequency generation (TR-HD-VSFG) spectroscopy. The temporal change of the vibrationally excited hydrogen-bonded (HB) OH stretch band (ν=1→2 transition) is measured, enabling us to determine reliable vibrational relaxation (T
    Language English
    Publishing date 2024-02-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-024-45388-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Elucidation of the pH-Dependent Electric Double Layer Structure at the Silica/Water Interface Using Heterodyne-Detected Vibrational Sum Frequency Generation Spectroscopy.

    Wei, Feng / Urashima, Shu-Hei / Nihonyanagi, Satoshi / Tahara, Tahei

    Journal of the American Chemical Society

    2023  Volume 145, Issue 16, Page(s) 8833–8846

    Abstract: The silica/water interface is one of the most abundant charged interfaces in natural environments, and the elucidation of the water structure at the silica/water interface is essential. In the present study, we measured the interface-selective ... ...

    Abstract The silica/water interface is one of the most abundant charged interfaces in natural environments, and the elucidation of the water structure at the silica/water interface is essential. In the present study, we measured the interface-selective vibrational (χ
    Language English
    Publishing date 2023-04-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.2c11344
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Ultrafast vibrational dynamics of the free OD at the air/water interface: Negligible isotopic dilution effect but large isotope substitution effect.

    Ahmed, Mohammed / Nihonyanagi, Satoshi / Tahara, Tahei

    The Journal of chemical physics

    2022  Volume 156, Issue 22, Page(s) 224701

    Abstract: Vibrational relaxation dynamics of the OH stretch of water at the air/water interface has been a subject of intensive research, facilitated by recent developments in ultrafast interface-selective nonlinear spectroscopy. However, a reliable determination ... ...

    Abstract Vibrational relaxation dynamics of the OH stretch of water at the air/water interface has been a subject of intensive research, facilitated by recent developments in ultrafast interface-selective nonlinear spectroscopy. However, a reliable determination of the vibrational relaxation dynamics in the OD stretch region at the air/D
    Language English
    Publishing date 2022-06-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3113-6
    ISSN 1089-7690 ; 0021-9606
    ISSN (online) 1089-7690
    ISSN 0021-9606
    DOI 10.1063/5.0085320
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: The photochemical reaction of phenol becomes ultrafast at the air-water interface.

    Kusaka, Ryoji / Nihonyanagi, Satoshi / Tahara, Tahei

    Nature chemistry

    2021  Volume 13, Issue 4, Page(s) 306–311

    Abstract: Reactions at the interface between water and other phases play important roles in nature and in various chemical systems. Although some experimental and theoretical studies suggest that chemical reactions at water interfaces can be different from those ... ...

    Abstract Reactions at the interface between water and other phases play important roles in nature and in various chemical systems. Although some experimental and theoretical studies suggest that chemical reactions at water interfaces can be different from those in bulk water-for example, 'on-water catalysis' and the activation of photochemically inert fatty acids at the air-water interface upon photoexcitation-directly investigating these differences and generating molecular-level understanding has proved difficult. Here, we report on the direct probing of a photochemical reaction occurring at the air-water interface, using ultrafast phase-sensitive interface-selective nonlinear vibrational spectroscopy. The femtosecond time-resolved data obtained clearly show that the photoionization reaction of phenol proceeds 10
    Language English
    Publishing date 2021-02-08
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2464596-5
    ISSN 1755-4349 ; 1755-4330
    ISSN (online) 1755-4349
    ISSN 1755-4330
    DOI 10.1038/s41557-020-00619-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: DNA-Induced Reorganization of Water at Model Membrane Interfaces Investigated by Heterodyne-Detected Vibrational Sum Frequency Generation Spectroscopy

    Singh, Prashant Chandra / Ahmed, Mohammed / Nihonyanagi, Satoshi / Yamaguchi, Shoichi / Tahara, Tahei

    Journal of physical chemistry. 2022 Jan. 21, v. 126, no. 4

    2022  

    Abstract: Lipid–DNA complexes are important nonviral vectors to be used in gene therapy, which is one of the promising strategies for the cure of many diseases. Although interfacial water is expected to play a significant role in lipid–DNA complexation, a ... ...

    Abstract Lipid–DNA complexes are important nonviral vectors to be used in gene therapy, which is one of the promising strategies for the cure of many diseases. Although interfacial water is expected to play a significant role in lipid–DNA complexation, a molecular-level understanding about the role of interfacial water in the DNA–lipid complexation is still sparse. In this study, the structure and orientation of water at cationic and zwitterionic lipid monolayer/water interfaces in the presence of DNA are studied by the use of interface-selective heterodyne-detected vibrational sum frequency generation (HD-VSFG) spectroscopy. It is found that the adsorption of DNA at a cationic lipid interface drastically decreases the orientation of interfacial water reflecting the neutralization of the positively charged interface, whereas the adsorption of DNA at a zwitterionic lipid interface makes interfacial water become more “H-up”, indicating that the originally zwitterionic interface becomes negatively charged due to the DNA adsorption. Furthermore, interfacial water having relatively strong hydrogen bonds is observed at both the cationic and zwitterionic lipid interfaces in the presence of DNA.
    Keywords DNA ; adsorption ; gene therapy ; hydrogen ; lipids ; neutralization ; spectroscopy ; zwitterions
    Language English
    Dates of publication 2022-0121
    Size p. 840-846.
    Publishing place American Chemical Society
    Document type Article
    ISSN 1520-5207
    DOI 10.1021/acs.jpcb.1c08581
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: In situ observation of the potential-dependent structure of an electrolyte/electrode interface by heterodyne-detected vibrational sum frequency generation.

    Sayama, Atsushi / Nihonyanagi, Satoshi / Ohshima, Yasuhiro / Tahara, Tahei

    Physical chemistry chemical physics : PCCP

    2020  Volume 22, Issue 4, Page(s) 2580–2589

    Abstract: Elucidating the structure of electrolyte/electrode interfaces is of essential importance not only for understanding of the fundamental process of electrochemistry but also for developing next-generation rechargeable batteries. In this study, we applied ... ...

    Abstract Elucidating the structure of electrolyte/electrode interfaces is of essential importance not only for understanding of the fundamental process of electrochemistry but also for developing next-generation rechargeable batteries. In this study, we applied HD-VSFG spectroscopy to study a prototypical non-aqueous electrochemical interface of a platinum electrode in 0.1 M LiCF
    Language English
    Publishing date 2020-01-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 1476244-4
    ISSN 1463-9084 ; 1463-9076
    ISSN (online) 1463-9084
    ISSN 1463-9076
    DOI 10.1039/c9cp06253j
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: DNA-Induced Reorganization of Water at Model Membrane Interfaces Investigated by Heterodyne-Detected Vibrational Sum Frequency Generation Spectroscopy.

    Singh, Prashant Chandra / Ahmed, Mohammed / Nihonyanagi, Satoshi / Yamaguchi, Shoichi / Tahara, Tahei

    The journal of physical chemistry. B

    2022  Volume 126, Issue 4, Page(s) 840–846

    Abstract: Lipid-DNA complexes are important nonviral vectors to be used in gene therapy, which is one of the promising strategies for the cure of many diseases. Although interfacial water is expected to play a significant role in lipid-DNA complexation, a ... ...

    Abstract Lipid-DNA complexes are important nonviral vectors to be used in gene therapy, which is one of the promising strategies for the cure of many diseases. Although interfacial water is expected to play a significant role in lipid-DNA complexation, a molecular-level understanding about the role of interfacial water in the DNA-lipid complexation is still sparse. In this study, the structure and orientation of water at cationic and zwitterionic lipid monolayer/water interfaces in the presence of DNA are studied by the use of interface-selective heterodyne-detected vibrational sum frequency generation (HD-VSFG) spectroscopy. It is found that the adsorption of DNA at a cationic lipid interface drastically decreases the orientation of interfacial water reflecting the neutralization of the positively charged interface, whereas the adsorption of DNA at a zwitterionic lipid interface makes interfacial water become more "H-up", indicating that the originally zwitterionic interface becomes negatively charged due to the DNA adsorption. Furthermore, interfacial water having relatively strong hydrogen bonds is observed at both the cationic and zwitterionic lipid interfaces in the presence of DNA.
    MeSH term(s) DNA ; Hydrogen Bonding ; Spectrum Analysis ; Vibration ; Water/chemistry
    Chemical Substances Water (059QF0KO0R) ; DNA (9007-49-2)
    Language English
    Publishing date 2022-01-21
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1520-5207
    ISSN (online) 1520-5207
    DOI 10.1021/acs.jpcb.1c08581
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Adsorption of SARS-CoV-2 Spike (N501Y) RBD to Human Angiotensin-Converting Enzyme 2 at a Lipid/Water Interface.

    Rozak, Harison / Nihonyanagi, Satoshi / Myalitsin, Anton / Roy, Subhadip / Ahmed, Mohammed / Tahara, Tahei / Rzeznicka, Izabela I

    The journal of physical chemistry. B

    2023  Volume 127, Issue 20, Page(s) 4406–4414

    Abstract: The receptor binding domain (RBD) of spike proteins plays a crucial role in the process of severe acute respiratory syndrome corona virus 2 (SARS-CoV-2) attachment to the human angiotensin-converting enzyme 2 (ACE2). The N501Y mutation and later ... ...

    Abstract The receptor binding domain (RBD) of spike proteins plays a crucial role in the process of severe acute respiratory syndrome corona virus 2 (SARS-CoV-2) attachment to the human angiotensin-converting enzyme 2 (ACE2). The N501Y mutation and later mutations introduced extra positive charges on the spike RBD and resulted in higher transmissibility, likely due to stronger binding with the highly negatively charged ACE2. Consequently, many studies have been devoted to understanding the molecular mechanism of spike protein binding with the ACE2 receptor. Most of the theoretical studies, however, have been done on isolated proteins. ACE2 is a transmembrane protein; thus, it is important to understand the interaction of spike proteins with ACE2 in a lipid matrix. In this study, the adsorption of ACE2 and spike (N501Y) RBD at a lipid/water interface was studied using the heterodyne-detected vibrational sum frequency generation (HD-VSFG) technique. The technique is a non-linear optical spectroscopy which measures vibrational spectra of molecules at an interface and provides information on their structure and orientation. It is found that ACE2 is effectively adsorbed at the positively charged 1,2-dipalmitoyl-3-trimethylammonium-propane (DPTAP) lipid monolayer via electrostatic interactions. The adsorption of ACE2 at the DPTAP monolayer causes a reorganization of interfacial water (D
    MeSH term(s) Humans ; Adsorption ; Angiotensin-Converting Enzyme 2 ; Lipids ; Mutation ; Propane ; Protein Binding ; SARS-CoV-2 ; Spike Glycoprotein, Coronavirus ; Water
    Chemical Substances Angiotensin-Converting Enzyme 2 (EC 3.4.17.23) ; Lipids ; Propane (T75W9911L6) ; Spike Glycoprotein, Coronavirus ; spike protein, SARS-CoV-2 ; Water (059QF0KO0R)
    Language English
    Publishing date 2023-05-12
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1520-5207
    ISSN (online) 1520-5207
    DOI 10.1021/acs.jpcb.3c00832
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Reorientation-induced relaxation of free OH at the air/water interface revealed by ultrafast heterodyne-detected nonlinear spectroscopy.

    Inoue, Ken-Ichi / Ahmed, Mohammed / Nihonyanagi, Satoshi / Tahara, Tahei

    Nature communications

    2020  Volume 11, Issue 1, Page(s) 5344

    Abstract: The uniqueness of water originates from its three-dimensional hydrogen-bond network, but this hydrogen-bond network is suddenly truncated at the interface and non-hydrogen-bonded OH (free OH) appears. Although this free OH is the most characteristic ... ...

    Abstract The uniqueness of water originates from its three-dimensional hydrogen-bond network, but this hydrogen-bond network is suddenly truncated at the interface and non-hydrogen-bonded OH (free OH) appears. Although this free OH is the most characteristic feature of interfacial water, the molecular-level understanding of its dynamic property is still limited due to the technical difficulty. We study ultrafast vibrational relaxation dynamics of the free OH at the air/water interface using time-resolved heterodyne-detected vibrational sum frequency generation (TR-HD-VSFG) spectroscopy. With the use of singular value decomposition (SVD) analysis, the vibrational relaxation (T
    Language English
    Publishing date 2020-10-22
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-020-19143-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Comment on "Phase-sensitive sum frequency vibrational spectroscopic study of air/water interfaces: H

    Ahmed, Mohammed / Nojima, Yuki / Nihonyanagi, Satoshi / Yamaguchi, Shoichi / Tahara, Tahei

    The Journal of chemical physics

    2020  Volume 152, Issue 23, Page(s) 237101

    Language English
    Publishing date 2020-07-07
    Publishing country United States
    Document type Journal Article ; Comment
    ZDB-ID 3113-6
    ISSN 1089-7690 ; 0021-9606
    ISSN (online) 1089-7690
    ISSN 0021-9606
    DOI 10.1063/1.5126062
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

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