参考文献
[1] Kroto H W, Heath J R, O’Brien S C, et al. C60: Buckminsterfullerene[J]. Nature,1985, 318: 162.
[2] Peters G, Jamen M. A new fullerene synthesis[J]. Angewandte Chemie International Edition in English, 1992, 31: 223.
[3] Krtschmer W, Fostiropoulos K, Huffman D R. The infrared and ultraviolet absorption spectra of laboratory-produced carbon dust: evidence for the presence of the C60 molecule[J]. Chemical Physics Letters, 1990, 170: 167.
[4] Popov A A, Yang S, Dunsch L. Endohedral fullerenes[J]. Chemical Reviews, 2013, 113 (8): 5989-6113.
[5] Howard J B, Mckinnon J T, Makarovsky Y,et al. Fullerenes C60 and C70 in flames[J]. Nature,1991, 352: 139.
[6] Taylor R, Langley G J, Kroto H W,et al. Formation of C60 by pyrolysis of naphthalene[J]. Nature,1993, 366: 728-731.
[7] Xie S, Huang R, Yu L,et al. Microwave synthesis of fullerenes from chloroform[J]. Applied Physics Letters, 1999, 75 (18): 2764-2766.
[8] Ivanov V, Nagy J B, Lambin P,et al. The study of carbon nanotubules produced by catalytic method[J]. Chemical Physics, Letters. 1994, 223(4): 329-335.
[9] Boorum M M, Vasil’Ev Y V, Drewello T,et al. Groundwork for a rational synthesis of C60: cyclodehydrogenation of a C60H30 polyarene[J]. Science, 2001, 294: 828-831.
[10]Olmstead M M, de Bettencourt-Dias A, Olmstead M M, et al. Isolation and structural characterization of the endohedral fullerene Sc3N@C78[J]. Angewandte Chemie International Edition, 2001, 40: 1223
[11] Fu W, Xu L, Azurmendi H,et al. 89Y and 13C NMR cluster and carbon cage studies of an yttrium metallofullerene family, Y3N@C2n (n=40-43)[J]. Journal of the American Chemical Society, 2009, 131 (33): 11762-11769.
[12] Stevenson S, Fowler P W, Heine T, et al. A stable non-classical metallofullerene family[J]. Nature,2000, 408: 427.
[13] Dunsch L, Krause M, Noack J,et al. Endohedral nitride cluster fullerenes Formation and spectroscopic analysis of L3–xMxN@C2n(0≤x≤3; n=39, 40)[J].Journal of Physics and Chemsitry of Solids, 2004, 65 (2-3): 309-315.
[14] Liu F, Guan J, Wei T, et al. A series of inorganic solid nitrogen sources for the synthesis of metal nitride clusterfullerenes: the dependence of production yield on the oxidation state of nitrogen and counter ion[J]. Inorganic Chemistry, 2013, 52 (7): 3814-3822.
[15] Yang S, Wei T, Jin F. When metal clusters meet carbon cages: endohedral clusterfullerenes[J]. Chemical Society Reviews, 2017, 46 (16): 5005-5058.
[16] Jiao M, Zhang W, Xu Y,et al. Urea as a new and cheap nitrogen source for the synthesis of metal nitride clusterfullerenes: the role of decomposed products on the selectivity of fullerenes[J]. Chemistry-A European Journal, 2012, 18 (9): 2666-2673.
[17] Yang S, Liu F, Chen C, et al. Fullerenes encaging metal clusters-clusterfullerenes[J]. Chemical Communications, 2011, 47 (43): 11822-11839.
[18] Popov A A, Yang S, Dunsch L. Endohedral fullerenes[J]. Chemical Reviews, 2013, 113 (8): 5989-6113.
[19] Lu X, Nakajima K, Iiduka Y,et al. Structural elucidation and regioselective functionalization of an unexplored carbide cluster metallofullerene Sc2C2@Cs(6)-C82[J]. Journal of the American Chemical Society, 2011, 133 (48): 19553-19558.
[20] Kurihara H, Lu X, Iiduka Y,et al. X-ray structures of Sc2C2@C2n (n=40-42): in-depth understanding of the core−shell interplay in carbide cluster Metallofullerenes[J]. Inorganic Chemistry, 2012, 51 (1): 746-750.
[21] Kurihara H, Lu X, Iiduka Y, et al. Sc2C2@C80 rather than Sc2@C82: templated formation of unexpected C2v(5)-C80 and temperature-dependent dynamic motion of internal Sc2C2 cluster[J]. Journal of the American Chemical Society, 2011, 133 (8): 2382-2385.
[22] Shi Z Q, Wu X, Wang C,et al. Isolation and characterization of Sc2C2@C68: a metal-carbide endofullerene with a non-IPR carbon cage[J]. Angewandte Chemie International Edition, 2006, 45(13):2107-2111.
[23] Ito Y, Okazaki T, Okubo S,et al.Enhanced 1520 nm photoluminescence from Er3+ ions in di-erbium-carbide metallofullerenes (Er2C2)@C82 (isomers Ⅰ, Ⅱ, and Ⅲ)[J]. ACS Nano, 2007, 1 (5): 456-462.
[24] Yang H, Lu C, Liu Z,et al. Detection of a family of gadolinium-containing endohedral fullerenes and the isolation and crystallographic characterization of one member as a metal−carbide encapsulated inside a large fullerene cage[J]. Journal of the American Chemical Society, 2008, 130 (51): 17296-17300.
[25] Popov A A, Chen N, Pinzón J R,et al. Redox-active scandium oxide cluster inside a fullerene cage: spectroscopic, voltammetric, electron spin resonance spectroelectrochemical, and extended density functional theory study of Sc4O2@C80 and its ion radicals[J]. Journal of the American Chemical Society,2012, 134 (48): 19607-19618.
[26] Mercado B Q, Olmstead M M, Beavers C M,et al. A seven atom cluster in a carbon cage, the crystallographically determined structure of Sc4(μ3-O)3@Ih-C80[J]. Chemical Communications, 2010, 46 (2): 279-281.
[27] Zhang M, Hao Y, Li X, et al. Facile synthesis of an extensive family of Sc2O@C2n (n=35-47) and chemical insight into the smallest member of Sc2O@C2(7892)-C70[J]. Journal of Physical Chemistry C, 2014, 118 (49): 28883-28889.
[28] Dunsch L, Yang S, Zhang L,et al. Metal sulfide in a C82 fullerene cage: a new form of endohedral clusterfullerenes[J]. Journal of the American Chemical Society, 2010, 132 (15): 5413-5421.
[29] Chen N, Chaur M N, Moore C,et al. Synthesis of a new endohedral fullerene family, Sc2S@C2n(n=40-50) by the introduction of SO2[J]. Chemical. Communications, 2010, 46: 4818-4820.
[30] Mercado B Q, Chen N, Rodríguez-Fortea A,et al. The shape of the Sc2(μ2-S) unit trapped in C82: crystallographic, computational, and electrochemical studies of the isomers, Sc2(μ2-S)@Cs(6)-C82 and Sc2(μ2-S)@C3v(8)-C82[J]. Journal of the American Chemical Society, 2011, 133 (17): 6752-6760.
[31] Li F, Chen N, Mulet-Gas M, et al. Ti2S@D3h(24109)-C78: a sulfide cluster metallofullerene containing only transition metals inside the cage[J]. Chemical Science, 2013, 4: 3404-3410.
[32] Liu F, Wang S, Gao C,et al. Mononuclear clusterfullerene single-molecule magnet containing strained fused-pentagons stabilized by a nearly linear metal cyanide cluster[J]. Angewandte Chemie International Edition, 2017, 56: 1830-1834.
[33] Liu F, Wang S, Guan J, et al. Putting a terbium-monometallic cyanide cluster into the C82 fullerene cage: TbCN@C2(5)-C82[J]. Inorganic Chemistry, 2014, 53 (10): 5201-5205.
[34] Krause M, Ziegs F, Popov A A, et al. Entrapped bonded hydrogen in a fullerene: the five-atom cluster Sc3CH in C80[J]. ChemPhysChem, 2007, 8 (4): 537-540.
[35] Jin P, Zhou Z, Hao C,et al. NC unit trapped by fullerenes: a density functional theory study on Sc3NC@C2n (2n=68, 78 and 80)[J]. Physical Chemistry Chemical Physics, 2010, 12 (39): 12442-12449.
[36] Wang T, Wu J, Feng Y. Scandium carbide/cyanide alloyed cluster inside fullerene cage: synthesis and structural studies of Sc3(μ3-C2)(μ3-CN)@Ih-C80[J]. Dalton Transactions, 2014, 43: 16270-16274.
[37] Fuchs D, Rietschel H, Michel R H,et al. Extraction and chromatographic elution behavior of endohedral metallofullerenes: Inferences regarding effective dipole moments[J]. Journal of Physical Chemistry, 1996, 100 (2): 725-729.
[38] Tsuchiya T, Wakahara T, Lian Y,et al. Selective extraction and purification of endohedral metallofullerene from carbon soot[J]. Journal of Physical Chemistry B, 2006, 110 (45): 22517-22520.
[39] Kareev I E, Bubnov V P, Laukhina E E, et al. Experimental evidence in support of the formation of anionic endohedral metallofullerenes during their extraction with N,N‐dimethylformamide[J]. Fullerenes Nanotubes Carbon Nanostructures, 2005, 12 (1-2): 65-69.
[40] Lian Y, Shi Z, Zhou X, et al. Different extraction behaviors between divalent and trivalent endohedral metallofullerenes[J]. Chemistry of Materials, 2004, 16 (9): 1704-1714.
[41] Solodovnikov S, Tumanskii B, Bashilov V,et al. Spectral study of reactions of La@ C82 and Y@C82 with amino-containing solvents[J]. Russian Chemical Bulletin, 2001, 50 (11): 2242-2244.
[42] Sun D, Liu Z, Guo X,et al. High-yield extraction of endohedral rare-earth fullerenes[J]. Journal of Physical Chemistry B,1997, 101 (20): 3927-3930.
[43] Laukhina E E, Bubnov V P, Estrin Y I, et al. Novel proficient method for isolation of endometallofullerenes from fullerene-containing soots by two-step o-xylene-N, N-dimethylformamide extraction[J]. Journal of Materials Chemistry, 1998, 8 (4): 893-895.
[44] Xiao J, Savina M R, Martin G B, et al. Efficient HPLC purification of endohedral metallofullerenes on a porphyrin-silica stationary phase. Journal of the American Chemical Society, 1994, 116 (20): 9341-9342.
[45] Huang H, Yang S. Toward efficient synthesis of endohedral metallofullerenes by arc discharge of carbon rods containing encapsulated rare earth carbides and ultrasonic Soxhlet extraction[J]. Chemistry of Materials, 2000, 12 (9): 2715-2720.
[46] Kubozono Y, Maeda H, Takabayashi Y, et al. Extractions of Y@C60, Ba@C60, La@C60, Ce@C60, Pr@C60, Nd@C60, and Gd@C60 with aniline[J]. Journal of the American Chemical Society, 1996, 118 (29): 6998-6999.
[47] Yang S, Kalbac M, Popov A, et al. A facile route to the non-IPR fullerene Sc3N@C68: synthesis, spectroscopic characterization, and density functional theory computations (IPR: isolated pentagon rule)[J]. Chemistry-A European Journal, 2006, 37 (52): 7856-7863.
[48] Yang S, Dunsch L. A large family of dysprosium-based trimetallic nitride endohedral fullerenes: Dy3N@C2n (39≤n≤44)[J]. Journal of Physical Chemistry B, 2005, 109 (25): 12320-12328.
[49] Shinohara H, Yamaguchi H, Hayashi N,et al. Isolation and spectroscopic properties of scandium fullerenes (Sc2@C74, Sc2@C82, and Sc2@C84)[J]. Journal of Physical Chemistry, 1993, (17): 4259-4261.
[50] Yamamoto K, Funasaka H, Takahasi T, et al. Isolation and characterization of an ESR-active La@C82 isomer[J]. Journal of Physical Chemistry,1994, 98 (49): 12831-12833.
[51] Xu Z D, Nakane T, Shinohara H, Production and isolation of Ca@C82 (Ⅰ-Ⅳ) and Ca@C84 (Ⅰ,Ⅱ)metallofullerenes[J]. Journal of the American Chemical Society, 1996, 118 (45): 11309-11310.
[52] Yang S, Popov A A, Dunsch L. Large mixed metal nitride clusters encapsulated in a small cage: the confinement of the C68-based clusterfullerenes[J]. Chemical. Communications,2008, 25 (25): 2885-2887.
[53] Yang S, Popov A A, Chen C,et al. Mixed metal nitride clusterfullerenes in cage isomers: LuxSc3–xN@C80 (x=1, 2) as compared with MxSc3–xN@C80 (M=Er, Dy, Gd, Nd)[J]. Journal of Physical Chemistry C, 2009, 113 (18): 7616-7623.
[54] Yang S, Kalbac M, Popov A,et al. Gadolinium-based mixed-metal nitride clusterfullerenes GdxSc3–xN@C80 (x=1,2)[J]. ChemPhysChem, 2006, 7 (9): 1990-1995.
[55] Yang S, Popov A, Kalbac M,et al. The isomers of gadolinium scandium nitride clusterfullerenes GdxSc3–xN@C80(x=1,2) and their influence on cluster structure[J]. Chemistry—A European Journal, 2008, 14 (7): 2084-2092.
[56] Okimoto H, Kitaura R, Nakamura T,et al. Element-specific magnetic properties of di-erbium Er2@C82 and Er2C2@C82 metallofullerenes: a synchrotron soft X-ray magnetic circular dichroism study[J]. Journal of Physical Chemistry C,2008, 112 (15): 6103-6109.
[57] Inoue T, Tomiyama T, Sugai T,et al. Trapping a C2 radical in endohedral metallofullerenes: synthesis and structures of (Y2C2)@C82 (isomers Ⅰ, Ⅱ, and Ⅲ)[J]. Journal of Physical Chemistry B, 2004, 108 (23): 7573-7579.
[58] Chen N, Beavers C M, Muletgas M,et al. Sc2S@Cs(10528)-C72: a dimetallic sulfide endohedral fullerene with a non isolated pentagon rule cage[J]. Journal of the American Chemical Society, 2012, 134 (18): 7851.
[59] Dunsch L, Yang S, Zhang L, et al. Metal sulfide in a C82 fullerene cage: a new form of endohedral clusterfullerenes[J]. Journal of the American Chemical Society, 2010, 132 (15): 5413.
[60] Tagmatarchis N, Shinohara H. Production, separation, isolation, and spectroscopic study of dysprosium endohedral metallofullerenes[J]. Chemistry of Materials, 2000, 12 (10): 3222-3226.
[61] Stevenson S, Mackey M A, Pickens J E, et al. Selective complexation and reactivity of metallic nitride and oxometallic fullerenes with Lewis acids and use as an effective purification method[J]. Inorganic Chemistry, 2009, 48 (24): 11685-11690.
[62] Wang Z, Nakanishi Y, Noda S,et al. The origin and mechanism of non-HPLC purification of metallofullerenes with TiCl4[J]. Journal of Physical Chemistry C, 2012, 116 (48): 25563-25567.
[63] Akiyama K, Hamano T, Nakanishi Y, et al. Non-HPLC rapid separation of metallofullerenes and empty cages with TiCl4 Lewis acid[J]. Journal of the American Chemical Society, 2012, 134 (23): 9762-9767.
[64] Wang Z Y, Omachi H, Shinohara H, Non-chromatographic purification of endohedral metallofullerenes[J]. Molecules, 2017, 22 (5): 14.
[65] Stevenson S, Rottinger K A, Fahim M,et al.Tuning the selectivity of Gd3N cluster endohedral metallofullerene reactions with lewis acids[J]. Inorganic Chemistry, 2014, 53 (24): 12939-12946.
[66] Stevenson S, Rottinger K A. CuCl2 for the isolation of a broad array of endohedral fullerenes containing metallic, metallic carbide, metallic nitride, and metallic oxide clusters, and separation of their structural isomers[J]. Inorganic Chemistry, 2013, 52 (16): 9606-9612.
[67] Ge Z, Duchamp J C, Cai T,et al. Purification of endohedral trimetallic nitride fullerenes in a single, facile step[J]. Journal of the American Chemical Society, 2005, 127 (46): 16292-16298.
[68] Merrifield R B. Solid phase peptide synthesis. Ⅰ. The synthesis of a tetrapeptide[J]. Journal of the American Chemical Society, 1963, 85 (14): 2149-2154.
[69] Stevenson S, Mackey M A, Coumbe C E,et al. Rapid removal of D5h isomer using the “stir and filter approach” and isolation of large quantities of isomerically pure Sc3N@C80 metallic nitride fullerenes[J]. Journal of the American Chemical Society, 2007, 129 (19): 6072-6073.
[70] Stevenson S, Harich K, Yu H,et al.Nonchromatographic “stir and filter approach”(SAFA) for isolating Sc3N@ C80 metallofullerenes[J]. Journal of the American Chemical Society, 2006, 128 (27): 8829-8835.
[71] Tsuchiya T, Wakahara T, Shirakura S,et al. Reduction of endohedral metallofullerenes: A convenient method for isolation[J]. Chemistry of Materials, 2004, 16 (22): 4343-4346.
[72] Sun B, Gu Z. Solvent-dependent anion studies on enrichment of metallofullerene[J]. Chemistry Letters, 2002, 31 (12): 1164-1165.
[73] Pagona G, Economopoulos S P, Aono T,et al.Molecular recognition of La@C82 endohedral metallofullerene by an isophthaloyl-bridged porphyrin dimer[J]. Tetrahedron Letters, 2010, 51 (45): 5896-5899.
[74] Nakanishi Y, Omachi H, Matsuura S,et al. Size-selective complexation and extraction of endohedral metallofullerenes with cycloparaphenylene[J]. Angewandte Chemie. International Editions,2014, 53 (12): 3102-3106.