title: Untangling interactions of a zinc(II) complex containing a coumarin-porphyrin unit with alkaloids in water solutions: a photophysical study.
abstract: A metal complex 1 derivative from a coumarin bearing a porphyrin unit was spectroscopically characterized and its sensing ability towards the alkaloids caffeine 2, nicotine 3 and cotinine 4 was evaluated in these studies. This probe shows to be sensitive to the alkaloids studied, where a detectable amount of 2.5 ± 0.3 μM of cotinine was determined in dam water from the Vigia Dam located in the Montoito village region, Alentejo district, Portugal. The interaction of 1 with cotinine was also verified by MALDI-TOF-MS, where it was found with peaks at 877.2 and 1053.3 m/z corresponding to the species [1H](+) and [1CotinineH](+), respectively.
authors.affiliation: ProteoMass Scientific Society, Madan Parque, Rua dos Inventores, 2825-182, Caparica, Portugal.
authors.forename: Carla I M
authors.initials: CI
authors.lastname: Santos
authors.forename: Elisabete
authors.initials: E
authors.lastname: Oliveira
authors.forename: Hugo M
authors.initials: HM
authors.lastname: Santos
authors.forename: José C J M D S
authors.initials: JC
authors.lastname: Menezes
authors.forename: M Amparo F
authors.initials: MA
authors.lastname: Faustino
authors.forename: José A S
authors.initials: JA
authors.lastname: Cavaleiro
authors.forename: J L
authors.initials: JL
authors.lastname: Capelo
authors.forename: Maria da Graça P M S
authors.initials: Mda G
authors.lastname: Neves
authors.forename: Carlos
authors.initials: C
authors.lastname: Lodeiro
mesh_terms: D002110:Caffeine / Q000737:chemistry*; D003367:Cotinine / Q000737:chemistry*; D003374:Coumarins / Q000737:chemistry*; D000431:Ethanol / Q000737:chemistry; D005618:Fresh Water / Q000737:chemistry*; D015394:Molecular Structure; D009538:Nicotine / Q000737:chemistry*; D055668:Photochemical Processes; D011166:Porphyrins / Q000737:chemistry*; D011174:Portugal; D012996:Solutions; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013057:Spectrum Analysis; D014466:Ultraviolet Rays; D015032:Zinc / Q000737:chemistry*
chemical_list: D003374:Coumarins; D011166:Porphyrins; D012996:Solutions; D002110:Caffeine; D000431:Ethanol; D009538:Nicotine; C030123:coumarin; D015032:Zinc; D003367:Cotinine