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. Author manuscript; available in PMC: 2009 Aug 7.
Published in final edited form as: J Magn Reson. 2008 Apr 29;193(1):127–132. doi: 10.1016/j.jmr.2008.04.034

Fig. 6.

Fig. 6

Representation of columnar stacking arrangements in particulate probes. The smallest cross-sectional channel dimensions for LiPc, LiPc-α-PhO, LiNc, and LiNc-BuO are shown. In general the channels are wide enough for the diffusion of free oxygen molecules (size: 2.8 Å × 3.9 Å) into the lattice. Of the probes shown, LiPc-α-PhO has the smallest bore size (4.6 Å), which may hinder fast movement of oxygen molecule.