Highly fluorescent metallo-supramolecules based on
terpyridine-based monomers and transition metals have been obtained. These robust supramolecules provide high
quantum yields with emissions from violet to blue, green or yellow color. They have emerged as promising emitters for polymeric light-emitting diodes (PLEDs) due to desirable properties such as
high luminance, high purity, low cost, and good thermal stabilities. The supramolecule has molecular structure represented by the formulawherein M represents Group IB, IIB VIIA, VIIIA or
lanthanide metals; R is independently in each occurrence and is selected from the group consisting of
hydrogen,
halogen,
alkyl, substituted
alkyl,
aryl, substituted
aryl, or recognized donor and
acceptor groups; X is independently in each occurrence and is
nitrogen or
carbon atom; R is selected from alkoxy, aryloxy, heteroaryloxy,
alkyl,
aryl, heteroaryl, alkyl
ketone,
aryl ketone, heteroaryl
ketone, alkylester, arylester, heteroarylester, alkylamide, arylamide, heteroarylamide, alkylthio, arylthio, fluoroalkyl, fluoroaryl, amine,
imide,
carboxylate,
sulfonyl, alkyleneoxy, polyalkyleneoxy, or combination thereof; n is an integer of 1 to 100,000; Z is a counter
ion and is selected from the group of acetate, acetylacetonate, cyclohexanebutyrate, ethylhexanoate,
halide,
hexafluorophosphate, hexafluoroacetylacetonate,
nitrate,
perchlorate,
phosphate,
sulfate,
tetrafluoroborate or fluoromethanesulfonate; y is an integer of 0 to 4.