Notice bibliographique du personnel « Inside amber: New insights into the macromolecular structure of Class Ib resinite »
- Titre
- Inside amber: New insights into the macromolecular structure of Class Ib resinite
- Auteur ou éditeur
- Poulin, Jennifer
- Helwig, Kate
- Date de publication
- 2015
- Collation
- 94-106
- Titre de la source
- Organic geochemistry
- Numéro de la source
- vol. 86
- Résumé
- Class Ib resinites are the most common subclass of amber and are found throughout the world. They have a macromolecular structure based on co-polymerized communic acid, communol and biformenes. Because this class of resinite does not contain succinic acid, crosslinking of the polymer through esterification of communol moieties has never been theorized. Analysis of Class Ib resinites from Grassy Lake and Cedar Lake in western Canada was performed using pyrolysis–gas chromatography–mass spectrometry with in situ hexamethyldisilazane derivatization, using a thermal separation probe to perform the pyrolysis and sample introduction. This has allowed larger, more complex fragments to be released from the polymer matrix than previously possible using instantaneous pyrolysis methodologies. The results show for the first time that Class Ib resinite can undergo self-crosslinking between the communol and communic acid moieties in the polylabdane matrix. The chromatographic results also show that a portion of the monoterpenes and non-polymerizable diterpenes in the resinite are bound to the polymer matrix and not fully occluded as was previously theorized. Fourier transform infrared (FTIR) spectra of the resinites are presented and a more accurate spectral interpretation is proposed, based on the chromatographic results.
- Langue
- English = Anglais
- Sujet
- Amber
- Resinite
- Thermal separation probe
- Polylabdanoid
- Ambre
- Résine
- Sonde de séparation thermique
- Polylabdanoïde
- ISBN/ISSN
- 01466380
- Lien au document en anglais
- http://www.sciencedirect.com/science/article/pii/S0146638015001138
- Type de document
- Journal Article = Article de périodique
- Localisation
- #16445
- Clé
- 2040
- Collection
- Staff Bibliography