Structure of water and polymer at the buried polymer/water interface unveiled using heterodyne-detected vibrational sum frequency generation

The structure of the prototypical acrylic polymer (poly(methyl methacrylate): PMMA)/water interface is elucidated at the molecular level using heterodyne-detected sum-frequency generation. Two distinct OH groups of interfacial water are found at the interface: one forms hydrogen bonds with the carbo...

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Published inPhysical chemistry chemical physics : PCCP Vol. 22; no. 29; pp. 16527 - 16531
Main Authors Myalitsin, Anton, Ghosh, Sanat, Urashima, Shu-hei, Nihonyanagi, Satoshi, Yamaguchi, Shoichi, Aoki, Takashi, Tahara, Tahei
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 07.08.2020
Subjects
Bonding strength
Buried structures
Calibration
Carbonyl groups
Carbonyls
Hydrogen bonds
Polymers
Polymethyl methacrylate
Silicon dioxide
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Summary:The structure of the prototypical acrylic polymer (poly(methyl methacrylate): PMMA)/water interface is elucidated at the molecular level using heterodyne-detected sum-frequency generation. Two distinct OH groups of interfacial water are found at the interface: one forms hydrogen bonds with the carbonyl group and the other weakly interacts with the ester methyl group of the polymer surface. Heterodyne-detected vibrational sum frequency generation reveals the molecular-level structure of the polymer/water interface that is different from what has been argued.
Bibliography:10.1039/d0cp02618b
Electronic supplementary information (ESI) available: (1) Sample preparation and characterization, (2) phase calibration procedure, (3) Fresnel factor and reflectivity correction, (4) verification of the phase calibration procedure, (5) contribution of the silica/polymer interface. See DOI
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ISSN:1463-9076
1463-9084
DOI:10.1039/d0cp02618b