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Hirano T, Kumagai K, Ishiyama T, Morita A. Comment on "Sum-frequency vibrational spectroscopy of centrosymmetric molecule at interfaces" [J. Chem. Phys. 158, 074701 (2023)]. J Chem Phys 2024; 160:107101. [PMID: 38466566 DOI: 10.1063/5.0167357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 11/13/2023] [Indexed: 03/13/2024] Open
Affiliation(s)
- Tomonori Hirano
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Koichi Kumagai
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Tatsuya Ishiyama
- Department of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan
| | - Akihiro Morita
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
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Antalicz B, Sengupta S, Vilangottunjalil A, Versluis J, Bakker HJ. Orientational Behavior and Vibrational Response of Glycine at Aqueous Interfaces. J Phys Chem Lett 2024; 15:2075-2081. [PMID: 38358315 PMCID: PMC10895693 DOI: 10.1021/acs.jpclett.3c02930] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Aqueous glycine plays many different roles in living systems, from being a building block for proteins to being a neurotransmitter. To better understand its fundamental behavior, we study glycine's orientational behavior near model aqueous interfaces, in the absence and presence of electric fields and biorelevant ions. To this purpose, we use a surface-specific technique called heterodyne-detected vibrational sum-frequency generation spectroscopy (HD-VSFG). Using HD-VSFG, we directly probe the symmetric and antisymmetric stretching vibrations of the carboxylate group of zwitterionic glycine. From their relative amplitudes, we infer the zwitterion's orientation near surfactant-covered interfaces and find that it is governed by both electrostatic and surfactant-specific interactions. By introducing additional ions, we observe that the net orientation is altered by the enhanced ionic strength, indicating a change in the balance of the electrostatic and surfactant-specific interactions.
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Affiliation(s)
- Balázs Antalicz
- Ultrafast Spectroscopy, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
| | - Sanghamitra Sengupta
- Ultrafast Spectroscopy, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
| | | | - Jan Versluis
- Ultrafast Spectroscopy, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
| | - Huib J Bakker
- Ultrafast Spectroscopy, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
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Puro RL, Gray TP, Kapfunde TA, Richter-Addo GB, Raschke MB. Vibrational Coupling Infrared Nanocrystallography. NANO LETTERS 2024; 24:1909-1915. [PMID: 38315708 DOI: 10.1021/acs.nanolett.3c03958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Coupling between molecular vibrations leads to collective vibrational states with spectral features sensitive to local molecular order. This provides spectroscopic access to the low-frequency intermolecular energy landscape. In its nanospectroscopic implementation, this technique of vibrational coupling nanocrystallography (VCNC) offers information on molecular disorder and domain formation with nanometer spatial resolution. However, deriving local molecular order relies on prior knowledge of the transition dipole magnitude and crystal structure of the underlying ordered phase. Here we develop a quantitative model for VCNC by relating nano-FTIR collective vibrational spectra to the molecular crystal structure from X-ray crystallography. We experimentally validate our approach at the example of a metal organic porphyrin complex with a carbonyl ligand as the probe vibration. This framework establishes VCNC as a powerful tool for measuring low-energy molecular interactions, wave function delocalization, nanoscale disorder, and domain formation in a wide range of molecular systems.
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Affiliation(s)
- Richard L Puro
- Department of Physics and JILA, University of Colorado, Boulder, Colorado 80309, United States
| | - Thomas P Gray
- Department of Physics and JILA, University of Colorado, Boulder, Colorado 80309, United States
| | - Tsitsi A Kapfunde
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - George B Richter-Addo
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Markus B Raschke
- Department of Physics and JILA, University of Colorado, Boulder, Colorado 80309, United States
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Noblet T, Busson B. Diagrammatic theory of magnetic and quadrupolar contributions to sum-frequency generation in composite systems. J Chem Phys 2024; 160:024704. [PMID: 38193549 DOI: 10.1063/5.0187520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 12/15/2023] [Indexed: 01/10/2024] Open
Abstract
Second-order nonlinear processes like Sum-Frequency Generation (SFG) are essentially defined in the electric dipolar approximation. However, when dealing with the SFG responses of bulk, big nanoparticles, highly symmetric objects, or chiral species, magnetic and quadrupolar contributions play a significant role in the process too. We extend the diagrammatic theory for linear and nonlinear optics to include these terms for single objects as well as for multipartite systems in interaction. Magnetic and quadrupolar quantities are introduced in the formalism as incoming fields, interaction intermediates, and sources of optical nonlinearity. New response functions and complex nonlinear processes are defined, and their symmetry properties are analyzed. This leads to a focus on several kinds of applications involving nanoscale coupled objects, symmetric molecular systems, and chiral materials, both in line with the existing literature and opening new possibilities for original complex systems.
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Affiliation(s)
- Thomas Noblet
- GRASP-Biophotonics, CESAM, University of Liege, Institute of Physics, Allée du 6 août 17, 4000 Liège, Belgium
| | - Bertrand Busson
- Université Paris-Saclay, CNRS, Institut de Chimie Physique, UMR 8000, 91405 Orsay, France
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Hirano T, Morita A. Boundary effects and quadrupole contribution in sum frequency generation spectroscopy. J Chem Phys 2022; 156:154109. [PMID: 35459322 DOI: 10.1063/5.0076400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Calculation of time correlation functions is a primary task in the computational analysis of sum frequency generation spectroscopy. This paper resolved basic issues to extract interface signals from the calculation. These issues stem from the boundary to restrict the bulk region, which renders the practical computation feasible at a finite and affordable cost. The boundary is found to have significant influences on the time correlation functions, which is closely related to the quadrupole contribution in the nonlinear susceptibility. Thus, we thoroughly examined these influences to establish a proper treatment in performing reliable spectroscopic analysis. We elucidated the distinction of the present boundary effects from the quadrupole contribution and also established a proper center of molecule to minimize the quadrupole effect in the time correlation functions. In the case of liquid water, the proper center was found to be close to the center of mass of a water molecule.
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Affiliation(s)
- Tomonori Hirano
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Akihiro Morita
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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Moll CJ, Versluis J, Bakker HJ. Bulk Response of Carboxylic Acid Solutions Observed with Surface Sum-Frequency Generation Spectroscopy. J Phys Chem B 2021; 126:270-277. [PMID: 34962792 PMCID: PMC8762667 DOI: 10.1021/acs.jpcb.1c09051] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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We study the molecular
properties of aqueous acetic acid and formic
acid solutions with heterodyne-detected vibrational sum-frequency
generation spectroscopy (HD-VSFG). For acid concentrations up to ∼5
M, we observe a strong increase of the responses of the acid hydroxyl
and carbonyl stretch vibrations with increasing acid concentration
due to an increase of the surface coverage by the acid molecules.
At acid concentrations >5 M we observe first a saturation of these
responses and then a decrease. For pure carboxylic acids we even observe
a change of sign of the Im[χ(2)] response of the
carbonyl vibration. The decrease of the response of the hydroxyl vibration
and the decrease and sign change of the response of the carbonyl vibration
indicate the formation of cyclic dimers, which only show a quadrupolar
bulk response in the HD-VSFG spectrum because of their antiparallel
conformation. We also find evidence for the presence of a quadrupolar
response of the CH vibrations of the acid molecules.
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Affiliation(s)
- Carolyn J Moll
- Ultrafast Spectroscopy, AMOLF, Science Park 104,1098 XG Amsterdam, Netherlands
| | - Jan Versluis
- Ultrafast Spectroscopy, AMOLF, Science Park 104,1098 XG Amsterdam, Netherlands
| | - Huib J Bakker
- Ultrafast Spectroscopy, AMOLF, Science Park 104,1098 XG Amsterdam, Netherlands
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Mori W, Wang L, Sato Y, Morita A. Development of quadrupole susceptibility automatic calculator in sum frequency generation spectroscopy and application to methyl C-H vibrations. J Chem Phys 2020; 153:174705. [PMID: 33167643 DOI: 10.1063/5.0026341] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Sum frequency generation (SFG) spectroscopy has been established as a powerful interface probe technique based on the electric dipole approximation, while possible signals of quadrupole and bulk origin have also been known for a long time. In this work, we developed a computational tool, namely, Qsac (quadrupole susceptibility automatic calculator), to evaluate the comprehensive contributions of the dipole/quadrupole and interface/bulk in the arbitrary vibrational bands of SFG spectra. The calculations of relevant susceptibility terms are performed on the basis of the theory of energy representation using quantum chemical calculation and molecular dynamics simulation, which allows for semi-quantitative comparison among these terms on the same footing. We applied the Qsac to the methyl C-H stretching bands of organic molecules and found a general trend that the weak asymmetric bands are more sensitive to the bulk contribution than the symmetric ones. The phases of interface and bulk terms tend to cancel in the asymmetric band, which results in the reduced band intensity in the SFG spectra.
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Affiliation(s)
- Wataru Mori
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Lin Wang
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Yamato Sato
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Akihiro Morita
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
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