| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 26421 | Journal of Photochemistry and Photobiology A: Chemistry | 2014 | 5 Pages |
•A novel methyl pyridinium salt based on dipicolinate was synthesized.•The molecule exhibits pronounced negative solvatochromism.•High spectral sensitivities to water content changes in solvents were observed.•The molecule possesses high absorption spectral sensitivities to pH variations.•Enhanced two-photon absorption activity was obtained.
A novel pyridinium salt based on dipicolinate, PM-1 was synthesized from the corresponding neutral chromophore and enhanced two-photon absorption activity was obtained. The two-photon absorption cross section value is 6.8 × 102 GM. PM-1 exhibits pronounced negative solvatochromism and possesses high absorption spectral sensitivities to pH and water content changes. PM-1 could be used as pH probe and to measure the water content, particularly for less than 10%, in common water miscible organic solvents such as THF, 1,4-dioxane, acetone and methanol.
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