The Diffusion Coefficient of the 1:1 γ-Cyclodextrin Inclusion Complex of C[sub 60] via Hydrodynamic Modulation at a Rotating Disk Electrode

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Abstract
Structures of as‐prepared and annealed porous silicon samples have been characterized by nuclear magnetic resonance (NMR) spectroscopy. Magnetic shielding tensors have also been calculated using ab initio molecular orbital calculations to help the characterization. After the annealing at 300°C for 4 h, the NMR peak position shifted slightly and the chemical shift anisotropy increased. Hydrogen desorption during the annealing gives dimer structure from configuration. The assignments of NMR signals are as follows: −94 ppm due to SiH, −85 ppm due to , and about −85 ppm due to . The dimer has large chemical shift anisotropy and small magnetic shielding, which are caused by the strained conformation of the dimer. © 1999 The Electrochemical Society. All rights reserved.

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