title: Surface modification of luminescent lanthanide phosphate nanorods with cationic "Quat-primer" polymers.
abstract: "Quat-primer" polymers bearing cationic groups were investigated as a surface modifier for Tb-doped cerium phosphate green-emitting fluorescent nanorods (NRs). The NRs were synthesized by a microwave process without using any complex agents or ligands and were characterized with different analytical tools such as X-ray diffraction, transmission electron microscopy, and fluorescence spectroscopy. Poly(ethyleneimine) partially quarternized with glycidyltrimethylammonium chloride was synthesized separately and characterized in detail. (1)H and (13)C NMR spectroscopic studies revealed that the quaternary ammonium group was covalently attached to the polymer. UV-vis spectroscopy was used to examine the stability of the colloidal dispersions of the bare NRs as well as the modified NRs. ζ potential, thermogravimetric analysis, and atomic force microscopy studies were carried out to confirm that the positively charged Quat-primer polymer is adsorbed on the negatively charged surface of the NRs, which results in high dispersion stability. Emission spectra of the modified NRs indicated that there was no interference of the Quat-primer polymer with the fluorescence behavior.
authors: Inorganic Chemistry 1, Institute of Chemistry, Barbara Street 7, University of Osnabrueck, D-49076 Osnabrueck, Germany. rkomban@uni-osnabrueck.de
authors: Rajesh
authors: R
authors: Komban
authors: Ralph
authors: R
authors: Beckmann
authors: Sebastian
authors: S
authors: Rode
authors: Sachar
authors: S
authors: Ichilmann
authors: Angelika
authors: A
authors: Kühnle
authors: Uwe
authors: U
authors: Beginn
authors: Markus
authors: M
authors: Haase
mesh_terms: D007811:Lanthanum / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D018625:Microscopy, Atomic Force; D046529:Microscopy, Electron, Transmission; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D010710:Phosphates / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D010710:Phosphates; D011108:Polymers; C551148:lanthanide phosphate; D007811:Lanthanum