title: Fluorescence analysis of iodinated acetophenone derivatives.
abstract: In the present paper the synthesis and optical characterization of iodinated acetophenone, 4-hydroxy-3-iodoacetophenone and 4-hydroxy-3,5-diiodoacetophenone obtained from 4-hydroxyacetophenone, were carried out. The optical features of iodinated molecules were determined by performing the UV-Vis absorption, fluorescence and thermal lens spectroscopies. The results showed that the optical properties of the 4-hydroxyacetophenone is altered when the iodine atom is inserted, as substituent, in the aromatic ring. Although it was determined that the optical feature was changed when one iodine atom was inserted in the aromatic ring (4-hydroxy-3-iodoacetophenone), the results revealed that emission behavior was strongly altered when two iodine atoms (4-hydroxy-3,5-diiodoacetophenone) were acting as substituents: the fluorescence quantum efficiency increases approximately 60%.
authors.affiliation: Grupo de Óptica Aplicada, Universidade Federal da Grande Dourados, CP 533, 79804-970 Dourados, MS, Brazil.
authors.forename: F
authors.initials: F
authors.lastname: Crivelaro
authors.affiliation: Grupo de Óptica Aplicada, Universidade Federal da Grande Dourados, CP 533, 79804-970 Dourados, MS, Brazil.
authors.forename: M R S
authors.initials: MR
authors.lastname: Oliveira
authors.affiliation: Grupo de Espectroscopia Óptica e Fototérmica, Universidade Estadual do Mato Grosso do Sul, CP 351, 79804-970 Dourados, MS, Brazil.
authors.forename: S M
authors.initials: SM
authors.lastname: Lima
authors.affiliation: Grupo de Espectroscopia Óptica e Fototérmica, Universidade Estadual do Mato Grosso do Sul, CP 351, 79804-970 Dourados, MS, Brazil.
authors.forename: L H C
authors.initials: LH
authors.lastname: Andrade
authors.affiliation: Instituto de Química, Universidade Federal de Mato Grosso do Sul, CP 549, 79074-460 Campo Grande, MS, Brazil.
authors.forename: G A
authors.initials: GA
authors.lastname: Casagrande
authors.affiliation: Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Rua Prof. Artur Riedel, 275, Jd. Eldorado, 09972-270 Diadema, SP, Brazil.
authors.forename: C
authors.initials: C
authors.lastname: Raminelli
authors.affiliation: Grupo de Óptica Aplicada, Universidade Federal da Grande Dourados, CP 533, 79804-970 Dourados, MS, Brazil. Electronic address: andersoncaires@ufgd.edu.br.
authors.forename: A R L
authors.initials: AR
authors.lastname: Caires
mesh_terms: D000098:Acetophenones / Q000737:chemistry*; D054879:Halogenation; D011789:Quantum Theory; D012996:Solutions; D013050:Spectrometry, Fluorescence; D013696:Temperature
chemical_list: D000098:Acetophenones; D012996:Solutions; C038699:acetophenone
keywords: Acetophenone; Fluorescence; Fluorescence quantum yield; Iodine