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Kurosu S, Hata S, Ukai T, Mashiko Y, Choi S, Minakawa T, Tanuma Y, Maekawa T. Thermal treatment of water-soluble particles formed by compounds composed of carbon nanobelts and C 60 molecules. Sci Rep 2023; 13:18480. [PMID: 37898707 PMCID: PMC10613224 DOI: 10.1038/s41598-023-45840-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 10/24/2023] [Indexed: 10/30/2023] Open
Abstract
It was previously shown that spherical particles are self-assembled by compounds composed of C60-(6,6)CNB-C60, where CNB stands for "carbon nanobelt", by mixing two individual solutions of C60 and (6,6)CNB molecules dissolved in 1,2-dichlorobenzene at room temperature. The particles are monodisperse in water thanks to their high absolute value of the zeta potential in water. In this report, we investigate the effect of thermal treatment of the particles on some changes in the physical properties and structures. We find that the particles become electrically conductive after thermal treatment at 600 °C for 1 h. We suppose that the change in the electrical characteristics might have been caused by the structural change of (6,6)CNBs into opened-up ribbons composed of fused benzene rings, which construct networks supported by C60 molecules in the particles, judging by the change in the absorption and mass spectra of the particles after thermal treatment and analysis of a possible change in the structure of C60-(6,6)CNB-C60 based on quantum chemical calculations employing the PM6 method, with which it is known that nanostructures such as carbon nanotubes (CNTs) and (6,6)CNBs can be correctly estimated.
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Affiliation(s)
- Shunji Kurosu
- Bio-Nano Electronics Research Centre, Toyo University, 2100, Kujirai, Kawagoe, 350-8585, Japan
- Graduate School of Interdisciplinary New Science, Toyo University, 2100, Kujirai, Kawagoe, 350-8585, Japan
| | - Sayaca Hata
- Graduate School of Science and Engineering, Toyo University, 2100, Kujirai, Kawagoe, 350-8585, Japan
| | - Tomofumi Ukai
- Bio-Nano Electronics Research Centre, Toyo University, 2100, Kujirai, Kawagoe, 350-8585, Japan
- Graduate School of Interdisciplinary New Science, Toyo University, 2100, Kujirai, Kawagoe, 350-8585, Japan
| | - Yuta Mashiko
- Graduate School of Interdisciplinary New Science, Toyo University, 2100, Kujirai, Kawagoe, 350-8585, Japan
| | - Sieun Choi
- Graduate School of Interdisciplinary New Science, Toyo University, 2100, Kujirai, Kawagoe, 350-8585, Japan
| | - Takanobu Minakawa
- Graduate School of Interdisciplinary New Science, Toyo University, 2100, Kujirai, Kawagoe, 350-8585, Japan
| | - Yuri Tanuma
- Bio-Nano Electronics Research Centre, Toyo University, 2100, Kujirai, Kawagoe, 350-8585, Japan
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
| | - Toru Maekawa
- Bio-Nano Electronics Research Centre, Toyo University, 2100, Kujirai, Kawagoe, 350-8585, Japan.
- Graduate School of Interdisciplinary New Science, Toyo University, 2100, Kujirai, Kawagoe, 350-8585, Japan.
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Oliveira RR, Molpeceres G, Montserrat R, Fantuzzi F, Rocha AB, Kästner J. Gas-phase C 60H n+q ( n = 0-4, q = 0,1) fullerenes and fulleranes: spectroscopic simulations shed light on cosmic molecular structures. Phys Chem Chem Phys 2023; 25:25746-25760. [PMID: 37724022 DOI: 10.1039/d3cp03254j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/20/2023]
Abstract
The discovery of C60, C60+, and C70 in the interstellar medium has ignited a profound interest in the astrochemistry of fullerene and related systems. In particular, the presence of diffuse interstellar bands and their association with C60+ has led to the hypothesis that hydrogenated derivatives, known as fulleranes, may also exist in the interstellar medium and contribute to these bands. In this study, we systematically investigated the structural and spectroscopic properties of C60Hn+q (n = 0-4, q = 0,1) using an automated global minimum search and density functional theory calculations. Our results revealed novel global minimum structures for C60H2 and C60H4, distinct from previous reports. Notably, all hydrogenated fullerenes exhibited lower ionization potentials and higher proton affinities compared to C60. From an astrochemical perspective, our results exposed the challenges in establishing definitive spectroscopic criteria for detecting fulleranes using mid-infrared and UV-Vis spectroscopies. However, we successfully identified distinct electronic transitions in the near-infrared range that serve as distinctive signatures of cationic fulleranes. We strongly advocate for further high-resolution experimental studies to fully explore the potential of these transitions for the interstellar detection of fulleranes.
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Affiliation(s)
- Ricardo R Oliveira
- Chemistry Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Germán Molpeceres
- Department of Astronomy, Graduate School of Science, The University of Tokyo, Tokyo 113 0033, Japan
| | - Ricardo Montserrat
- Chemistry Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Felipe Fantuzzi
- School of Chemistry and Forensic Science, University of Kent, Canterbury CT2 7NH, UK
| | - Alexandre B Rocha
- Chemistry Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Johannes Kästner
- Institute for Theoretical Chemistry, University of Stuttgart, Stuttgart, Germany
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