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Impact of pyrene orientation on the electronic properties and stability of graphene ribbons.
- Source :
- Journal of Materials Chemistry C; 10/7/2024, Vol. 12 Issue 37, p14816-14822, 7p
- Publication Year :
- 2024
-
Abstract
- We report the synthesis and study of trialkylsilylethyne-substituted "oblique" pyrene-fused acenes, carbon nanoribbons demonstrating near-IR absorption with reversible oxidation and reduction, and acene-like evolution of electronic properties upon extension of the aromatic core. Their electronic structures are investigated through DFT studies, which support the more delocalized nature of their frontier molecular orbitals compared to more common "vertical" pyrene systems. Despite a longer aromatic core, the more extended of the two examples demonstrates enhanced photostability compared to the shorter derivative, running counter to the trend in linear acenes. The unusual stability of the longer core is ultimately linked to its relatively low T<subscript>1</subscript> energy inhibiting the generation of reactive O<subscript>2</subscript> species. The byproduct generated upon photooxidation of the shorter nanoribbon appears to catalyze the generation of <superscript>1</superscript>O<subscript>2</subscript> due to its large T<subscript>1</subscript> energy, leading to its relatively decreased stability. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507526
- Volume :
- 12
- Issue :
- 37
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry C
- Publication Type :
- Academic Journal
- Accession number :
- 179871639
- Full Text :
- https://doi.org/10.1039/d4tc03072a