TABLE 2.
Structural parameters of the Cb. tepidum double-tube aggregates
| Parameter | Value | Mean deviation |
|---|---|---|
| Inner tube | ||
| Radius (with respect to Mg-atoms - z-axis) | 26.82 Å | ±0.7 Å (along x-axis) |
| ±0.8 Å (along y-axis) | ||
| Distance between chlorins in stacks (Mg-Mg distance; along z-axis in a stack) | 6.75 Å | ±0.3 Å |
| Shift between neighbors stacks along z-axis | 1.68 Å | ±0.5 Å |
| Angle* between transition dipole moment vector and symmetry axis (α) | 35.5° | ±0.8° |
| Angle* between transition dipole moment vector and radius-vector connecting Mg-atom and z-axis (β) | 274° | ±2.8° |
| Number of stacks per tube | 20 | – |
| Outer tube | ||
| Radius (with respect to Mg-atoms - z-axis) | 40.72 Å | ±0.6 Å (along x-axis) |
| ±0.6 Å (along y-axis) | ||
| Distance between chlorins in stacks (Mg-Mg distance; along z-axis in a stack) | 6.71 Å | ±0.1 Å |
| Shift between neighbors stacks along z-axis | 1.35 Å | ±0.23 Å |
| Angle* between transition dipole moment vector and symmetry axis (α) | 36° | ±0.6° |
| Angle* between transition dipole moment vector and radius-vector connecting Mg-atom and z-axis (β) | 265° | ±2° |
| Number of stacks per tube | 30 | – |
*
For the angle definition, see Table 1.