Results 161 to 170 of about 19,943 (186)

NMR characterization of isomers of C78, C82 and C84 fullerenes

Nature, 1992
FOLLOWING the development of a method for bulk synthesis of C60 and other fullerenes1, the isolation of higher fullerenes ranging from C76 to C96 has been achieved using chromatographic techniques2–5. Whereas C60 and C70 have unique, high-symmetry structures6, theoretical calculations for fullerenes larger than C76 have suggested that each may exist in
Koichi Kikuchi, Nobuo Nakahara, Tomonari Wakabayashi, Shinzo Suzuki, Haruo Shiromaru, Yoko Miyake, Kazuya Saito, Isao Ikemoto, Masatsune Kainosho, Yohji Achiba   +9 more
openaire   +1 more source

High Regioselective Cycloaddtion of Sc3N@C78 with Aryl Oxiranes

ECS Meeting Abstracts, 2019
Endohedral metallofullerenes (EMFs) with entrapping atoms and clusters have many superior properties due to the electron transfer from inner clusters to outer carbon cages, enabling them numerous potential applications in the fields of single molecule magnet, energy conversion, nano devices.
Muqing Chen, Runnan Guan, Fei Jin, Shangfeng Yang   +3 more
openaire   +1 more source

Formation of titanium-carbide in a nanospace of C78 fullerenes

Chemical Physics Letters, 2007
Abstract Geometric and electronic structures of C 78 fullerenes encapsulating two Ti atoms and a C 2 molecule are studied by the first-principle total energy calculations. We find that the substantial hybridization between the 3d state of Ti atoms and the 2p state of C atoms results in the formation of weak covalent bonds between them and that the ...
Minoru Otani, Susumu Okada, Atsushi Oshiyama   +2 more
openaire   +1 more source

Analysis of the structure of the C78 fullerene: A topological approach

Applied Physics A Solids and Surfaces, 1993
We report a detailed topological analysis of the C78 fullerene. The study was carried out via a graph-theoretic approach which is capable of predicting the number of lines and their relative intensities in the 13C NMR spectrum of any given fullerene isomer.
O. Ori, M. D'Mello
openaire   +1 more source

ChemInform Abstract: NMR Characterization of Isomers of C78, C82, and C84 Fullerenes.

ChemInform, 1993
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
K. KIKUCHI, N. NAKAHARA, T. WAKABAYASHI, S. SUZUKI, H. SHIROMARU, Y. MIYAKE, K. SAITO, I. IKEMOTO, M. KAINOSHO, Y. ACHIBA   +9 more
openaire   +1 more source

Electrochemistry of Sc3N@C78 embedded in didodecyldimethylammonium bromide films in aqueous solution

Microchimica Acta, 2008
The electrochemical behavior of trimetallic nitride clusterfullerene (Sc3N@C78) embedded in films of the cationic surfactant didodecyldimethylammonium bromide (DDAB) on glassy carbon (GC) electrodes in aqueous solution was investigated. Four pairs of reversible redox peaks were observed in the potential range between +0.6 and −0.9 V vs. SCE.
Zhao, Mingyan, Zhang, Lin, Chen, Ning, Wang, Chunru, Fan, Louzhen, Yang, Shihe   +5 more
openaire   +2 more sources

Electronic structure and spectroscopy of the five most stable isomers of C78 fullerene

The Journal of Physical Chemistry, 1995
Of the many possible isomers of C{sub 78} fullerene, five isomers, thought to be the most stable, have been examined using the semiempirical intermediate neglect of differential overlap INDO/1 and INDO/S models. Two of these structures have C{sub 2v} symmetry, two have D{sub 3h} symmetry, and one has D{sub 3} symmetry.
Rajiv D. Bendale, Michael C. Zerner
openaire   +1 more source

Abstract C78: Integrin αvβ3 drives stemness in the pregnant and neoplastic mammary gland

Cancer Research, 2013
Abstract Carcinoma cell expression of the integrin αvβ3 is associated with enhanced tumorigenicity and metastasis in a diverse array of human tumors. Here, we reveal αvβ3 expression in a subset of CD44+CD24-/low cancer stem cells in human breast tumor biopsies.
Jay Desgrosellier, Jacqueline Lesperance, Laetitia Seguin, David Cheresh   +3 more
openaire   +1 more source

Faraday communications. The higher fullerences: a candidate for the structure of C78

Journal of the Chemical Society, Faraday Transactions, 1991
A systematic search reveals five C78 fullerene cages with isolated pentagons, but only one with a closed electronic shell, as predicted by Fowler's leapfrog rule. The closed-shell isomer has D3h symmetry and is the most likely candidate for the structure of C78. Like C70, it corresponds to an expansion of the C60 structure by insertion of an equatorial
Patrick W. Fowler, Robin C. Batten, David E. Manolopoulos   +2 more
openaire   +1 more source

Calculations of Molar Fractions of the IPR C78 Fullerenes

AIP Conference Proceedings, 2002
There are five isolated‐pentagon‐rule (IPR) satisfying isomers of C78. In contradiction to theoretical predictions, only three isomers were observed in experiments and the fourth one was not identified until very recently. In this work we calculate structural and energetic data of the five IPR C78 fullerenes, namely we optimized their geometries with ...
openaire   +1 more source