Light Absorption Properties
Methylene blue is a potent cationic dye with maximum absorption of light around 670 nm. The specifics of absorption depend on a number of factors, including protonation, adsorption to other materials, and metachromasy - the formation of dimers and higher-order aggregates depending on concentration and other interactions:
| Species | Absorption peak | Extinction coefficient (dm3/mole·cm) |
|---|---|---|
| MB+ (solution) | 664 | 95000 |
| MBH2+ (solution) | 741 | 76000 |
| (MB+)2 (solution) | 605 | 132000 |
| (MB+)3 (solution) | 580 | 110000 |
| MB+ (adsorbed on clay) | 673 | 116000 |
| MBH2+ (adsorbed on clay) | 763 | 86000 |
| (MB+)2 (adsorbed on clay) | 596 | 80000 |
| (MB+)3 (adsorbed on clay) | 570 | 114000 |
Read more about this topic: Methylene Blue
Famous quotes containing the words light, absorption and/or properties:
“So doth, so is Religion; and this blind-
ness too much light breeds; but unmoved thou
Of force must one, and forc’d but one allow;
And the right; ask thy father which is she,
let him ask his; though truth and falsehood be
Near twins, yet truth a little elder is;”
—John Donne (1572–1631)
“The great social adventure of America is no longer the conquest of the wilderness but the absorption of fifty different peoples.”
—Walter Lippmann (1889–1974)
“A drop of water has the properties of the sea, but cannot exhibit a storm. There is beauty of a concert, as well as of a flute; strength of a host, as well as of a hero.”
—Ralph Waldo Emerson (1803–1882)