The characteristics as a chemosensor of the compound 3-methyl-6,8-di(2-pyridyl)-[1,2,3]triazolo[5',1':6,1]pyrido[2,3-
d]pyrimidine (
1) have been analyzed. Interaction with Cu
2+ produces a quenching of thefluorescence, while interaction with Zn
2+ leads to a quenching of the fluorescence followed by abathochromic shift. The crystal structure of the [Zn(
1)(H
2O)
3](ClO
4)
2]·H
2O complex shows the coordinationof Zn
2+ through the terpyridine moiety. The octahedral site is completed by three water molecules.Interactions of the Zn
2+ complex with the anions sulfate, nitrate, nitrite, and dihydrogenphosphate inethanol produce hypsochromic shifts and restoration of the fluorescence whose magnitude depends onthe anion involved. The maximum interaction is observed for H
2PO
4-. Interactions of the Zn
2+ complexwith the amino acids
L-aspartate and
L-glutamate have also been explored showing a higher interactionwith
L-aspartate.
