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Teprovich JA, Washington AL, Dixon J, Ward PA, Christian JH, Peters B, Zhou J, Giri S, Sharp DN, Velten JA, Compton RN, Jena P, Zidan R. Investigation of hydrogen induced fluorescence in C 60 and its potential use in luminescence down shifting applications. Nanoscale 2016; 8:18760-18770. [PMID: 27801449 DOI: 10.1039/c6nr05998h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Herein the photophysical properties of hydrogenated fullerenes (fulleranes) synthesized by direct hydrogenation utilizing hydrogen pressure (100 bar) and elevated temperatures (350 °C) are compared to the fulleranes C60H18 and C60H36 synthesized by amine reduction and the Birch reduction, respectively. Through spectroscopic measurements and density functional theory (DFT) calculations of the HOMO-LUMO gaps of C60Hx (0 ≤ x ≤ 60), we show that hydrogenation significantly affects the electronic structure of C60 by decreasing conjugation and increasing sp3 hybridization. This results in a blue shift of the emission maximum as the number of hydrogen atoms attached to C60 increases. Correlations in the emission spectra of C60Hx produced by direct hydrogenation and by chemical methods also support the hypothesis of the formation of C60H18 and C60H36 during direct hydrogenation with emission maxima of 435 and 550 nm respectively. We also demonstrate that photophysical tunability, stability, and solubility of C60Hx in a variety of organic solvents make them easily adaptable for application as luminescent down-shifters in heads-up displays, light-emitting diodes, and luminescent solar concentrators. The utilizization of carbon based materials in these applications can potentially offer advantages over commonly utilized transition metal based quantum dot chromophores. We therefore propose that the controlled modification of C60 provides an excellent platform for evaluating how individual chemical and structural changes affect the photophysical properties of a well-defined carbon nanostructure.
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Affiliation(s)
- J A Teprovich
- Savannah River National Laboratory, Aiken, SC 29808, USA.
| | - A L Washington
- Savannah River National Laboratory, Aiken, SC 29808, USA.
| | - J Dixon
- Savannah River National Laboratory, Aiken, SC 29808, USA.
| | - P A Ward
- Savannah River National Laboratory, Aiken, SC 29808, USA.
| | - J H Christian
- Savannah River National Laboratory, Aiken, SC 29808, USA.
| | - B Peters
- Savannah River National Laboratory, Aiken, SC 29808, USA.
| | - J Zhou
- Virginia Commonwealth University, Physics Department, Richmond, VA 23284, USA
| | - S Giri
- National Institute of Technology Rourkela, Department of Chemistry, Odisha 769008, India
| | - D N Sharp
- University of Tennessee, Department of Chemistry, Knoxville, TN 37996, USA
| | - J A Velten
- Savannah River National Laboratory, Aiken, SC 29808, USA.
| | - R N Compton
- University of Tennessee, Department of Chemistry, Knoxville, TN 37996, USA
| | - P Jena
- Virginia Commonwealth University, Physics Department, Richmond, VA 23284, USA
| | - R Zidan
- Savannah River National Laboratory, Aiken, SC 29808, USA.
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Christian JH, Teprovich JA, Wilson J, Nicholson JC, Truong TT, Kesterson MR, Velten JA, Wiedenhöver I, Baby LT, Anastasiou M, Rijal N, Washington II AL. Developing radiation tolerant polymer nanocomposites using C 60as an additive. RSC Adv 2016. [DOI: 10.1039/c6ra01126h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The attenuation of alpha particles is modelled using Monte-Carlo N-Particle Extended software. Using tandem Van de Graaff accelerator tests, it is shown that doping with C60fullerene can significantly enhance the lifetime of polymers in alpha radiation environments.
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Affiliation(s)
| | | | - J. Wilson
- Savannah River National Laboratory
- Aiken
- USA
| | | | | | | | | | - I. Wiedenhöver
- Department of Physics
- Florida State University
- Tallahassee
- USA
| | - L. T. Baby
- Department of Physics
- Florida State University
- Tallahassee
- USA
| | - M. Anastasiou
- Department of Physics
- Florida State University
- Tallahassee
- USA
| | - N. Rijal
- Department of Physics
- Florida State University
- Tallahassee
- USA
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