title: ZnS:Mn nanoparticles functionalized by PAMAM-OH dendrimer based fluorescence ratiometric probe for cadmium.
abstract: We report a nanocomposite of ZnS:Mn quantum dots and a third generation PAMAM-OH dendrimer (ZnS:Mn@PAMAM-OH(G=3)) which was rationalized to be used as ratiometric nanosensor for Cd(2+) in aqueous solution. The nanoparticles exhibited a bright yellow-orange emission with peaks at 448 and 595 nm. The structure of ZnS:Mn was not changed after coupling with PAMAM-OH, which was evidenced by the analysis of the emission spectra of the compounds. The results confirm that the prepared fluorescence nanoparticles could selectively detect Cd(2+) in aqueous solution with a limit of detection of 24.34 μM and RSD 4.07%, obtained by using the ratio I448/I595. The method was applied to different water samples.
authors.affiliation: Centro de Investigação em Química, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Porto, Portugal.
authors.forename: Bruno B
authors.initials: BB
authors.lastname: Campos
authors.affiliation: Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos s/n, 29071 Málaga, Spain. Electronic address: malgarra67@gmail.com.
authors.forename: Manuel
authors.initials: M
authors.lastname: Algarra
authors.affiliation: Institute for Multidisciplinary Research, University of Belgrade, KnezaVišeslava 1, 11000 Beograd, Serbia.
authors.forename: Ksenija
authors.initials: K
authors.lastname: Radotić
authors.affiliation: Institute for Multidisciplinary Research, University of Belgrade, KnezaVišeslava 1, 11000 Beograd, Serbia.
authors.forename: Dragosav
authors.initials: D
authors.lastname: Mutavdžić
authors.affiliation: Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos s/n, 29071 Málaga, Spain.
authors.forename: Enrique
authors.initials: E
authors.lastname: Rodríguez-Castellón
authors.affiliation: Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos s/n, 29071 Málaga, Spain.
authors.forename: José
authors.initials: J
authors.lastname: Jiménez-Jiménez
authors.affiliation: Departamento de Química Inorgánica, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain.
authors.forename: Beatriz
authors.initials: B
authors.lastname: Alonso
authors.affiliation: Departamento de Química Inorgánica, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain.
authors.forename: Carmen M
authors.initials: CM
authors.lastname: Casado
authors.affiliation: Centro de Investigação em Química, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Porto, Portugal.
authors.forename: Joaquim C G
authors.initials: JCG
authors.lastname: Esteves da Silva
keywords: Cadmium; Dendrimer; Quantum dots; Ratiometric sensor; ZnS:Mn(2+)