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Sakakibara K, Nishiumi K, Shimoaka T, Hasegawa T, Tsujii Y. pMAIRS Analysis on Chain-End Functionalization of Densely Grafted, Concentrated Polymer Brushes. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Keita Sakakibara
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Kosuke Nishiumi
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Takafumi Shimoaka
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Takeshi Hasegawa
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Yoshinobu Tsujii
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
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2
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Nonkumwong J, Erasquin UJ, Sy Piecco KW, Premadasa UI, Aboelenen AM, Tangonan A, Chen J, Ingram D, Srisombat L, Cimatu KLA. Successive Surface Reactions on Hydrophilic Silica for Modified Magnetic Nanoparticle Attachment Probed by Sum-Frequency Generation Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:12680-12693. [PMID: 30300547 DOI: 10.1021/acs.langmuir.8b01333] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Successive surface reactions on hydrophilic silica substrates were designed and performed to immobilize ethanolamine-modified magnetic ferrite-based nanoparticle (NP) for surface characterization. The various surfaces were monitored using sum-frequency generation (SFG) spectroscopy. The surface of the hydrophilic quartz substrate was first converted to a vinyl-terminated surface by utilizing a silanization reaction, and then, the surface functional groups were converted to carboxylic-terminated groups via a thiol-ene reaction. The appearance and disappearance of the vinyl (═CH2) peak at ∼2990 cm-1 in the SFG spectra were examined to confirm the success of the silanization and thiol-ene reactions, respectively. Acyl chloride (-COCl) formation from carboxy (-COOH) functional group was then performed for further attachment of magnetic amine-functionalized magnesium ferrite nanoparticles (NPs) via amide bond formation. The scattered NPs attached on the modified silica substrate was then used to study the changes in the spectral profile of the ethanolamine modifier of the NPs for in situ lead(II) (Pb2+) adsorption at the solid-liquid interface using SFG spectroscopy. However, due to the limited number of NPs attached and sensitivity of SFG spectroscopy toward expected change in the modifier spectroscopically, no significant change was observed in the SFG spectrum of the modified silica with magnetic NPs during exposure to Pb2+ solution. Nevertheless, SFG spectroscopy as a surface technique successfully monitored the modifications from a clean fused substrate to -COCl formation that was used to immobilize the decorated magnetic nanoparticles. The method developed in this study can provide a reference for many surface or interfacial studies important for selective attachment of adsorbed organic or inorganic materials or particles.
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Affiliation(s)
- Jeeranan Nonkumwong
- Department of Chemistry and Biochemistry , Ohio University , 100 University Terrace, 136 Clippinger Laboratories , Athens , Ohio 45701-2979 , United States
- Department of Chemistry, Faculty of Science , Chiang Mai University , Chiang Mai 50200 , Thailand
| | - Uriel Joseph Erasquin
- Department of Chemistry and Biochemistry , Ohio University , 100 University Terrace, 136 Clippinger Laboratories , Athens , Ohio 45701-2979 , United States
| | - Kurt Waldo Sy Piecco
- Department of Chemistry and Biochemistry , Ohio University , 100 University Terrace, 136 Clippinger Laboratories , Athens , Ohio 45701-2979 , United States
| | - Uvinduni I Premadasa
- Department of Chemistry and Biochemistry , Ohio University , 100 University Terrace, 136 Clippinger Laboratories , Athens , Ohio 45701-2979 , United States
| | - Ahmed M Aboelenen
- Department of Chemistry and Biochemistry , Ohio University , 100 University Terrace, 136 Clippinger Laboratories , Athens , Ohio 45701-2979 , United States
| | - Andrew Tangonan
- Department of Chemistry and Biochemistry , Ohio University , 100 University Terrace, 136 Clippinger Laboratories , Athens , Ohio 45701-2979 , United States
| | - Jixin Chen
- Department of Chemistry and Biochemistry , Ohio University , 100 University Terrace, 136 Clippinger Laboratories , Athens , Ohio 45701-2979 , United States
| | - David Ingram
- Department of Physics and Astronomy , Ohio University , 139 University Terrace, 136 Clippinger Laboratories , Athens , Ohio 45701-2979 , United States
| | - Laongnuan Srisombat
- Department of Chemistry, Faculty of Science , Chiang Mai University , Chiang Mai 50200 , Thailand
| | - Katherine Leslee Asetre Cimatu
- Department of Chemistry and Biochemistry , Ohio University , 100 University Terrace, 136 Clippinger Laboratories , Athens , Ohio 45701-2979 , United States
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Mousli Y, Rouvière L, Traboulsi I, Hunel J, Buffeteau T, Heuzé K, Vellutini L, Genin E. Hydrosilylation of Azide-Containing Olefins as a Convenient Access to Azidoorganotrialkoxysilanes for Self-Assembled Monolayer Elaboration onto Silica by Spin Coating. ChemistrySelect 2018. [DOI: 10.1002/slct.201800858] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yannick Mousli
- ISM, UMR 5255 CNRS; University of Bordeaux; F-33400 Talence France
| | - Lisa Rouvière
- ISM, UMR 5255 CNRS; University of Bordeaux; F-33400 Talence France
| | - Iman Traboulsi
- ISM, UMR 5255 CNRS; University of Bordeaux; F-33400 Talence France
| | - Julien Hunel
- ISM, UMR 5255 CNRS; University of Bordeaux; F-33400 Talence France
| | | | - Karine Heuzé
- ISM, UMR 5255 CNRS; University of Bordeaux; F-33400 Talence France
| | - Luc Vellutini
- ISM, UMR 5255 CNRS; University of Bordeaux; F-33400 Talence France
| | - Emilie Genin
- ISM, UMR 5255 CNRS; University of Bordeaux; F-33400 Talence France
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Rehl B, Li Z, Gibbs JM. Influence of High pH on the Organization of Acetonitrile at the Silica/Water Interface Studied by Sum Frequency Generation Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:4445-4454. [PMID: 29580058 DOI: 10.1021/acs.langmuir.7b04289] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The acetonitrile-water mixture is one of the most commonly used solvents in hydrophilic interaction chromatography, which contains silica as the solid phase. As such, the silica/acetonitrile-water interface plays a large role in the separation of compounds. Varying the pH is one way to influence retention times, particularly of ionizable solutes, yet the influence of high pH is often unpredictable. To determine how the structure of this interface changes with pH, we utilized the surface specific technique sum frequency generation (SFG). Previous SFG studies at neutral pH have suggested the existence of acetonitrile bilayers at the aqueous silica interface even at low acetonitrile mole fractions. Here we find that the SFG signal from 2900 to 3040 cm-1 at the silica/acetonitrile-water interface increased as we adjusted the aqueous pH from near neutral to high values. This increase in signal was attributed to a greater amount of aligned water which is consistent with an increase in silica surface charge at high pH. In contrast, complementary measurements of the silica/acetonitrile-deuterium oxide interface revealed that the acetonitrile methyl mode nearly vanished as the aqueous pH was increased. This loss of methyl mode signal is indicative of a decrease in the number density of acetonitrile molecules at the interface, as orientation analysis indicates no significant change in the net orientation of the outer leaflet of the acetonitrile bilayer over the pH range studied.
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Affiliation(s)
- Benjamin Rehl
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Zhiguo Li
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Julianne M Gibbs
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
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Chase HM, Chen S, Fu L, Upshur MA, Rudshteyn B, Thomson RJ, Wang HF, Batista VS, Geiger FM. Orientations of nonlocal vibrational modes from combined experimental and theoretical sum frequency spectroscopy. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.01.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Li Z, Weeraman CN, Azam MS, Osman E, Gibbs-Davis JM. The thermal reorganization of DNA immobilized at the silica/buffer interface: a vibrational sum frequency generation investigation. Phys Chem Chem Phys 2015; 17:12452-7. [DOI: 10.1039/c5cp00781j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Vibrational SFG reveals that C–H stretches associated with the nucleobase rather than the phosphate-sugar backbone are most sensitive to DNA duplex “melting” at the silica/buffer interface.
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Affiliation(s)
- Zhiguo Li
- Department of Chemistry
- University of Alberta
- Edmonton
- Canada
| | | | | | - Eiman Osman
- Department of Chemistry
- University of Alberta
- Edmonton
- Canada
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