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Photoemissive polymer composite based on new Y(III), Gd(III), and Tb(III) complexes with N-hydroxyphthalimide

In the present work, a green emitting composite with attractive photoluminescent properties was obtained through the embedding of the Tb3+ complex with N-hydroxyphthalimide in a poly-(N-vinyl-pyrrolidone) matrix, which was further processed in thin or thick films. First, several complexes of Gd3+, Tb3+, and Y3+ with N-hydroxyphthalimide with the general formula [M(NHF)3(DMF)2] were prepared at a 1:3 metal/ligand ratio. The Tb3+ complex presents specific emission peaks, with the most intense peak located at 543 nm, thus being selected for incorporation in the poly(N-vinyl-pyrrolidone) matrix. | Turkish Journal of Chemistry Turk J Chem 2017 41 648 657 http journals.tubitak.gov.tr chem ITAK c TUB Research Article doi 10.3906 kim-1609-69 Photoemissive polymer composite based on new Y III Gd III and Tb III complexes with N-hydroxyphthalimide Catalina Yarodara ROSCA Petronela HORLESCU Corneliu S. STAN Daniel SUTIMAN Department of Chemical Engineering Faculty of Chemical Engineering and Environmental Protection Gheorghe Asachi Technical University of Iasi Iasi Romania Received 28.09.2016 Accepted Published Online 13.03.2017 Final Version 10.11.2017 Abstract In the present work a green emitting composite with attractive photoluminescent properties was ob- tained through the embedding of the Tb 3 complex with N-hydroxyphthalimide in a poly- N-vinyl-pyrrolidone ma- trix which was further processed in thin or thick films. First several complexes of Gd 3 Tb 3 and Y 3 with N-hydroxyphthalimide with the general formula M NHF 3 DMF 2 were prepared at a 1 3 metal ligand ratio. The Tb 3 complex presents specific emission peaks with the most intense peak located at 543 nm thus being selected for incorporation in the poly N-vinyl-pyrrolidone matrix. The prepared complexes and composites were investigated through elemental analysis thermal analysis FT-IR P-XRD and SEM. The photoluminescent properties were studied in detail. Remarkably through the embedding in the poly vinyl-pyrrolidone matrix the photoluminescent properties of the Tb 3 complex are notably enhanced compared to the free complex. Key words Luminescent complexes poly- N-vinyl-pyrrolidone luminescent polymer composites 1. Introduction During the last decades growing research interest was noted for developing of new photoluminescent compounds and materials for optoelectronic devices special purpose inks or coatings bioimaging assays etc. 1 2 Many of their applications focused on optoelectronics devices ranging from LEDs and OLEDs 3 4 to solar cells or fiber optics communications. 5 6 The majority of lanthanide .