Atomic Nitrogen Encapsulated in Fullerenes: Effects of Cage Variations

Autor:	Klaus Lips, Elke Dietel, B. Pietzak, Klaus-Peter Dinse, Alois Weidinger, Andreas Hirsch, M. Waiblinger, and Andrea Gruss
Rok vydání:	1999
Předmět:	Fullerene Chemistry General Chemistry Zero field splitting Biochemistry Catalysis law.invention Crystallography Colloid and Surface Chemistry Ion implantation Computational chemistry law Endohedral fullerene Reactivity (chemistry) Cage Ground state Electron paramagnetic resonance
Zdroj:	Journal of the American Chemical Society. 121:2432-2437
ISSN:	1520-5126 0002-7863
Popis:	The synthesis and EPR spectroscopic investigations of a family of six endohedral fullerenes, namely, N@C60 (1), N@C61(COOC2H5)2 (2), N@C66(COOC2H5)12 (3), N@C66(COOC2D5)12 (4), N@C61(COOC2D5)2 (5), and N@C70 (6), containing atomic nitrogen in the 4S3/2 ground state is described. The parent systems N@C60 (1) and N@C70 (6) were synthesized by nitrogen ion implantation. The syntheses of the C2v-symmetric monoadducts 2 and 5 and the Th symmetric hexaadducts 3 and 4 exhibiting well-defined cage distortions were accomplished via cyclopropanation with the corresponding malonates. With respect to these additions the reactivity of 1 is indistinguishable from that of empty C60. The quartet electronic spin of the encapsulated N-atoms is a very sensitive probe for cage modifications. In the monoadducts 2 and 5 a permanent zero field splitting (ZFS) tensor with rigidly aligned axes was revealed reflecting the intrinsic droplet like cage distortion. In contrast, no fine structure due to intrinsic distortions was monito...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::acb471ba57df36661d5bc9bb7b6c79bf https://doi.org/10.1021/ja983812s Zobrazit plný text záznamu