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π-Conjugated Carbon Radicals at Graphene Oxide to Initiate Ultrastrong Chemiluminescence.
- Source :
- Angewandte Chemie International Edition; Sep2014, Vol. 53 Issue 38, p10109-10113, 5p
- Publication Year :
- 2014
-
Abstract
- Graphene oxide has widely been employed in various fields, but its structure and composition has still not been fully understood. Here we report that freshly prepared graphene oxide exhibits a large number of π-conjugated carbon radicals at its π-network plane, which result from the addition reaction of hydroxyl radicals from H<subscript>2</subscript>O<subscript>2</subscript> onto the conjugated double bonds of graphene oxide. The π-conjugated carbon radicals can directly initiate the long-lasting visible chemiluminescence of luminol, which is even stronger than that obtained when horseradish peroxidase and H<subscript>2</subscript>O<subscript>2</subscript> are used. Previously, graphene oxide was mainly reported to be a quencher of chemiluminescence instead. Remarkably, the reacted radicals can be regenerated, thereby enabling the repetitive initiation of chemiluminescence by re-treatment of graphene oxide. The results reported here provide a new understanding of the structure, properties, and applications of graphene oxide. [ABSTRACT FROM AUTHOR]
- Subjects :
- CONJUGATED polymers
RADICAL ions
GRAPHENE oxide
CHEMILUMINESCENCE
LUMINOL
PEROXIDASE
Subjects
Details
- Language :
- English
- ISSN :
- 14337851
- Volume :
- 53
- Issue :
- 38
- Database :
- Complementary Index
- Journal :
- Angewandte Chemie International Edition
- Publication Type :
- Academic Journal
- Accession number :
- 97982416
- Full Text :
- https://doi.org/10.1002/anie.201405295