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Experimental Determination of Polymer Microstructures with 13C-NMR Spectroscopy
| Content Provider | Scilit |
|---|---|
| Author | Tonelli, Alan Shen, Jialong |
| Copyright Year | 2020 |
| Description | In this chapter, we demonstrate how$ ^{13}$C-NMR, currently the method of choice, can be used to characterize the microstructures of polymers. We show that the use of empirical substituent effects (α-, β-, and γ-) developed from the spectra of small molecule models with known structures can be utilized to assign$ ^{13}$C-NMR resonances to the microstructures that produce them. In addition, substituents that are separated by three bonds from and are γ to a$ ^{13}$C atom shield its nucleus from the static applied magnetic field only when they are arranged proximally in a gauche conformation. We denote this as the γ-gauche nuclear shielding effect. Because we have just attempted to demonstrate that polymer conformations are dictated by their microstructures, we can connect and characterize their microstructures and their$ ^{13}$C-NMR spectra in the following manner. Book Name: Conformations |
| Related Links | https://content.taylorfrancis.com/books/download?dac=C2017-0-60777-6&isbn=9780203703601&doi=10.1201/b22496-4&format=pdf |
| DOI | 10.1201/b22496-4 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2020-04-06 |
| Access Restriction | Open |
| Subject Keyword | Book Name: Conformations Polymer Science Conformations 13c Nmr Shield Gauche Characterize Their Microstructures |
| Content Type | Text |
| Resource Type | Chapter |
