Portal de Periódicos da CAPES

Isolation and characterization of two Pr@C82 isomers

2000; Elsevier BV; Volume: 319; Issue: 1-2 Linguagem: Inglês

10.1016/s0009-2614(00)00120-2

1873-4448

Takeshi Akasaka, Shingo Okubo, Masahiro Kondo, Yutaka Maeda, Takatsugu Wakahara, Tatsuhisa Kato, Toshiyasu Suzuki, Kazunori Yamamoto, Kaoru Kobayashi, Shigeru Nagase,

Graphene research and applications

The second isomer of [email protected]82 ([email protected]82-II) has been isolated by a two-step HPLC method, separately from the known major isomer ([email protected]82-I). Visible and near-IR absorption spectra, as well as cyclic and differential pulse voltammograms show that the characteristic features of [email protected]82-II are significantly different from those of [email protected]82-I. The absorption peaks of [email protected]82-II have blue-shifts and the redox potentials have negative shifts, relative to those of [email protected]82-I. Chemical derivatization of both isomers with disilirane have also been achieved.