The design of next-generation organic light-emitting diodes (OLEDs) is focused on polymers containing electroluminescent functionality with efficient chargetransport capability.It is desirable to investigate display materials which have excellent fluorescent properties of 8-hydroxyquinoline metal chelates and outstanding processing properties of polymers.An 8-hydroxyquinoline lithium (LiQ)-containing polymer (CPA-HQ-Li) was synthesized by chelating reaction of Li+ and HQ-pendant copolymer (CPA-HQ)

in which CPA-HQ was prepared with 5-chloromethyl-8-hydroxyquinoline (CHQ) and a copolymer (CPA) which was synthesized with n-butyl acrylate (BA)

2-(dimethylamino) ethyl methacrylate (DM)

methyl methacrylate (MMA)

2-hydroxyethyl acrylate (HEA) and styrene (ST).As a functional group

DM was added according to 9.69 wt% as original material in the process of synthesizing CPA.Moreover

this positive-charged polymer was suitable for thin film deposition from dilute polymer solutions

the quarternary amonium PDM was used as the cation first adsoption layer to abtain a flexible substrate

the sulfonated fluoropolymer (Nafion 117) was used as the anion hole electon transport

and then

multilayer thin films were obtained by electrostatic self-assembly (ESA).For the characterization of the structures and properties of these polymers and multilayer films

the technologies inclucding 1H-NMR

UVVis

FTIR

photoluminescence (PL) spectra and gel permeation chromatography analysis (GPC) etc. were used.FT-IR analysis displays that the stretching vibration peak located initially at 1638 cm-1 is blue shifted to 1593 cm-1 nearby.It is found from UV-Vis absorbance that the absorption peak corresponding to π→π* electron transition of quinoline is still present

but it is red shifted from 248 nm to 258 nm

and the n→π* electron transition at 320 nm weakens or disappears.In addition

there is a broad absorption at 371 nm corresponding to the chelating of the polymer containing 8-hydroxyquinoline ligands with metal ion Li+.It is an enantiomorphous symmetrical connection between excitation and emission spectra of CPA-HQ-Li at λexit=366 nm and λemit=482 nm.Both the UV-Vis absorptions and fluorescence spectra of the films show a red shift compared to those examinated in tetrahydrofuran solutions.The UV-Vis absorptions show that the maximum UV absorbances of the composite films increase linearly with the number of film layers

but the fluorescence spectra reveal that the fluorescence intensity decrease linearly with the number of film layers.The results of the present work implies that these kinds of materials could be used for practical applications in OLEDs.