Production and isolation of the isomers of dimetallofullerenes, HoTm@C82 and Tm2@C82

Kikuchi, Kôichi; Akiyama, Kazuhiko; Sakaguchi, Kôichi; Kodama, Tohru; Nishikawa, Hiroyuki; Ikemoto, Isao; Ishigaki, T.; Achiba, Yohji; Sueki, Keisuke; Nakahara, Hiromichi

doi:10.1016/s0009-2614(00)00164-0

Cited by 27 publications

(27 citation statements)

References 17 publications

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“…No trimetal nitride clusterfullerenes higher than C 80 have been isolated and characterised so far. Hence, the visible‐NIR signatures of Tm 3 N@C 82 , Tm 3 N@C 84 and Tm 3 N@C 86 (Figure 5) were compared to those of endohedral dimetallofullerenes: Tm 2 @C 82 (I, II, III),24 Er 2 @C 82 (I, III),24 Sc 2 @C 84 (I: C s , II: C 2 v , III: D 2 d ),25 Dy 2 @C 84 (I, III),26 Sc 2 @C 86 (II)27 and Er 2 @C 86 (I, II, III) 28. No reasonable correspondence was found between the Tm 3 N clusterfullerene spectra and those of the dimetallofullerenes.…”

Section: Resultsmentioning

confidence: 99%

Expanding the World of Endohedral Fullerenes—The Tm₃N@C_2n (39≤n≤43) Clusterfullerene Family

Krause

Wong

Dunsch

2004

Chemistry A European J

120

167

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A new family of endohedral fullerenes, based on an encaged trithulium nitride (Tm(3)N) cluster, was synthesised, isolated and characterised by HPLC, mass spectrometry, and visible-NIR and FTIR spectroscopy. Tm(3)N clusterfullerenes with cages as small as C(76) and as large as C(88) were prepared and six of them were isolated. Tm(3)N@C(78) is a small clusterfullerene. The two isomers of Tm(3)N@C(80) (I and II) were the most abundant structures in the fullerene soot. Tm(3)N@C(82), Tm(3)N@C(84), and Tm(3)N@C(86) represent a new series of higher clusterfullerenes. All six isolated Tm(3)N clusterfullerenes were classified as large energy-gap structures with optical energy gaps between approximately 1.2 and approximately 1.75 eV. Tm(3)N@C(80) (I) and Tm(3)N@C(80) (II) were assigned to the C(80) cages C(80):7 (I(h)) and C(80):6 (D(5h)). For Tm(3)N@C(78), the analysis pointed to an elliptical carbon cage with C(78):1 (D(3)) or C(78):4 (D(3h)) being the probable structures.

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Section: Resultsmentioning

confidence: 99%

Expanding the World of Endohedral Fullerenes—The Tm₃N@C_2n (39≤n≤43) Clusterfullerene Family

Krause

Wong

Dunsch

2004

Chemistry A European J

120

167

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“…They are cited as providing superior yields to metallofullerenes, for which the total yield of all metallofullerenes constitutes 2% or less of all fullerene species within the reaction products. 6,7 A far rarer form of endohedral fullerene is where the entrapped species consists of two different metal ions, of which there are only three examples, HoTm@C 82 , 8 CaHo@C 82 9 and ErYC 2 @C 82 , 10 for which identification has been limited to mass spectrometry and optical absorption spectroscopy. Few species of praseodymium metallofullerenes have ever been reported; these include Pr@C 60 and Pr@C 74 , 11 Pr@C 82 [11][12][13] and Pr 2 @C 80 .…”

mentioning

confidence: 99%

A bimetallic endohedral fullerene: PrSc@C80

Plant

Warner

et al. 2009

Chem. Commun.

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“…Endohedral thulium is divalent in Tm@C 82 ,13, 14 whereas a +3 state is discussed for Tm 2 @C 82 15. 16 Structural studies on Sc 2 @C 84 ,17 Sc 3 @C 82 ,12 La@C 82 18 and Er 2 @C 82 3 show the metal ions in an off‐center position in the cage causing a low symmetry of the fullerene. In Sc 3 @C 82 the scandium ions form a (nearly) equilateral triangle 12…”

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confidence: 99%

Magnetic Moments of the Endohedral Cluster Fullerenes Ho₃N@C₈₀ and Tb₃N@C₈₀: The Role of Ligand Fields

Wolf¹,

Müller²,

Skourski³

et al. 2005

Angew Chem Int Ed

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The electronic and magnetic properties of endohedral fullerenes M k @C 2n for different metals M (such as lanthanides R, Group 3 and Group 2 metals) is a current area of endohedral fullerene research.[1] The influence of the electron transfer from M to the carbon cage, the geometric structure of the M k @C 2n , as well as the location of the metal ion(s) in the cage on the magnetic properties are commonly studied. As shown by ESR spectroscopy, photoemission or Mössbauer spectroscopy, R ions are trivalent in most cases as in Er k @C 82 for k = 1 and 2 [2,3] and Dy@C 2n (2n = 80, 82, 84). [4] Detailed studies of the fullerene magnetization versus applied field and temperature have confirmed these results. [5][6][7][8][9][10][11] On the other hand europium was found to be divalent in fullerenes for 2n = 74 or

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Production and isolation of the isomers of dimetallofullerenes, HoTm@C82 and Tm2@C82

Cited by 27 publications

References 17 publications

Expanding the World of Endohedral Fullerenes—The Tm₃N@C_2n (39≤n≤43) Clusterfullerene Family

Expanding the World of Endohedral Fullerenes—The Tm₃N@C_2n (39≤n≤43) Clusterfullerene Family

A bimetallic endohedral fullerene: PrSc@C80

Magnetic Moments of the Endohedral Cluster Fullerenes Ho₃N@C₈₀ and Tb₃N@C₈₀: The Role of Ligand Fields

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Production and isolation of the isomers of dimetallofullerenes, HoTm@C82 and Tm2@C82

Cited by 27 publications

References 17 publications

Expanding the World of Endohedral Fullerenes—The Tm3N@C2n (39≤n≤43) Clusterfullerene Family

Expanding the World of Endohedral Fullerenes—The Tm3N@C2n (39≤n≤43) Clusterfullerene Family

A bimetallic endohedral fullerene: PrSc@C80

Magnetic Moments of the Endohedral Cluster Fullerenes Ho3N@C80 and Tb3N@C80: The Role of Ligand Fields

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Expanding the World of Endohedral Fullerenes—The Tm₃N@C_2n (39≤n≤43) Clusterfullerene Family

Expanding the World of Endohedral Fullerenes—The Tm₃N@C_2n (39≤n≤43) Clusterfullerene Family

Magnetic Moments of the Endohedral Cluster Fullerenes Ho₃N@C₈₀ and Tb₃N@C₈₀: The Role of Ligand Fields