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Sawvel AM, Crowhurst JC, Mason HE, Oakdale JS, Ruelas S, Eshelman HV, Maxwell RS. Spectroscopic Signatures of MQ-Resins in Silicone Elastomers. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00086] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- April M. Sawvel
- Physical and Life Sciences Directorate, Materials Science Division, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States
| | - Jonathan C. Crowhurst
- Physical and Life Sciences Directorate, Materials Science Division, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States
| | - Harris E. Mason
- Physical and Life Sciences Directorate, Atmospheric, Earth, and Energy Division, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States
| | - James S. Oakdale
- Physical and Life Sciences Directorate, Materials Science Division, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States
| | - Samantha Ruelas
- Physical and Life Sciences Directorate, Materials Science Division, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States
| | - Hannah V. Eshelman
- Physical and Life Sciences Directorate, Materials Science Division, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States
| | - Robert S. Maxwell
- Physical and Life Sciences Directorate, Materials Science Division, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States
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Zhang C, Wang J, Ding B, Jasensky J. Quantitative Spectral Analysis of Coherent Anti-Stokes Raman Scattering Signals: C-H Stretching Modes of the Methyl Group. J Phys Chem B 2014; 118:7647-7656. [PMID: 24911655 DOI: 10.1021/jp5035807] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Coherent anti-Stokes Raman scattering (CARS) vibrational spectroscopy has been extensively developed into a powerful analytical technique to study various molecules. Quantitative interpretation of CARS spectra can help to improve CARS for chemical analysis and extend its analytical applications. In this work, we quantitatively analyzed CARS signals originating from the methyl groups in poly(dimethylsiloxane) (PDMS), with the help of the bond additivity method. Experimentally, a home-built CARS spectrometer modified from a commercial sum frequency generation spectrometer was used to collect CARS spectra from a PDMS film. Theoretically, we successfully reproduced the peak intensity ratio of C-H symmetric and asymmetric stretching modes of the PDMS methyl group in different polarization combinations based on bond additivity method and Raman depolarization ratio. This research shows that bond additivity theory can help to obtain the third-order nonlinear susceptibility tensor properties probed by different polarization combinations used in CARS spectroscopy. The method developed in this work could also be applied to CARS vibrational stretching analysis of other functional groups, providing quantitative understanding of CARS spectrum for applications in spectroscopy.
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Affiliation(s)
- Chi Zhang
- Department of Chemistry and ‡Department of Biophysics, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Jie Wang
- Department of Chemistry and ‡Department of Biophysics, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Bei Ding
- Department of Chemistry and ‡Department of Biophysics, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Joshua Jasensky
- Department of Chemistry and ‡Department of Biophysics, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States
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Walczak WJ, Hoagland DA, Hsu SL. Spectroscopic Evaluation of Models for Polyelectrolyte Chain Conformation in Dilute Solution. Macromolecules 1996. [DOI: 10.1021/ma951359o] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wanda J. Walczak
- Polymer Science and Engineering Department and Materials Research Laboratory, University of Massachusetts, Amherst, Massachusetts 01003
| | - David A. Hoagland
- Polymer Science and Engineering Department and Materials Research Laboratory, University of Massachusetts, Amherst, Massachusetts 01003
| | - Shaw L. Hsu
- Polymer Science and Engineering Department and Materials Research Laboratory, University of Massachusetts, Amherst, Massachusetts 01003
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Adshead A, Lindsay S. Hypersonic loss processes in poly(dimethyl siloxane) and the effects of crosslinking. POLYMER 1980. [DOI: 10.1016/0032-3861(80)90128-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Abraham JL, Etz ES. Molecular microanalysis of pathological specimens in situ with a laser-Raman microprobe. Science 1979; 206:716-8. [PMID: 493979 DOI: 10.1126/science.493979] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A laser-Raman microprobe has been used to identify microscopic inclusions of silicone polymer in standard paraffin sections of lymph node. This example of organic chemical microanalysis in situ in pathological tissue represents an extension of microanalytical capabilities from elemental analysis, performed with electron and ion microprobes, to compound-specific molecular microanalysis.
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Maxfield J, Shepherd I. Effect of a non-uniform distribution of crosslinks on the analysis of Raman polarization data in stretched networks. POLYMER 1975. [DOI: 10.1016/0032-3861(75)90059-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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