Abstract: The compounds of the present invention are represented by the following formula (I): wherein M is represented by the following formula: with R1, R2, R3, R4, R5, R6, R7, R8, R10, R11, X1, X2, X3, L, a, b, c, d, e, x, y, and z defined herein.

Abstract: An Ir complex having a pyridyl triazole ligand substituted with at least one substituent on its pyridyl ring, and a light emitting material comprising such Ir complex. Such light emitting material was found to have a significantly enhanced photophosphorescence quantum yield and hypsochromic blue shifted photophosphorescent emission over other Ir complexes with a pyridyl triazole ligand having no substituent in its pyridine ring. Use of such light emitting material and an organic light emitting device including the same.

Abstract: The compounds of the present invention are represented by the following formula (I): wherein M is represented by the following formula: with R1, R2, R3, R4, R5, R6, R7, R8, R10, R11, X1, X2, X3, L, a, b, c, d, e, x, y, and z defined herein.

Abstract: The present invention relates to emitting compounds for organic electroluminescent device, particularly to phenyl pyridine-iridium metal complex compounds represented by the following formula (1): wherein R1 to R8, A1 to A3, and Py are as defined in the specification. In addition, the present invention relates to an organic electroluminescent device comprising the above material which has high luminescence efficiency, enhanced operating life time, and high purity of red chromaticity.

Abstract: The present invention relates to emitting compounds for organic electroluminescent device, particularly to porphines-platinum metal complex compounds represented by the following formula (1): wherein R1 and R2 are as defined in the specification. In addition, the present invention relates to an organic electroluminescent device comprising the above material which has high luminescence efficiency, enhanced operating life time, and high purity of red chromaticity.

Abstract: The present invention relates to antibiotics, functional cosmetics and functional foods comprising levulinic acid or its derivatives as effective ingredients. More particularly, the present invention relates to antibiotics comprising levulinic acid or its derivatives having antibiotic activities against various microorganisms including Gram positive bacteria, Gram negative bacteria, yeast and drug-resistant bacteria. Also, the present invention relates to functional cosmetics and functional foods comprising the same.

Abstract: The present invention relates to luminescence materials for an organic electroluminescent device (OELD), and particularly to phenyl pyridine-iridium metal complex compounds of formula (1), and preparation method thereof. In addition, the present invention relates to an organic electroluminescent device using the luminescence materials according to the present invention, which can greatly enhance the efficiency of luminescence and increase the operating life time of the device: wherein R1, R2 and R3 each are the same as defined in the specification.

Abstract: The present invention relates to emitting compounds for organic electroluminescent device, particularly to phenyl pyridine-iridium metal complex compounds represented by the following formula (1): wherein R1 to R8, A1 to A3, and Py are as defined in the specification. In addition, the present invention relates to an organic electroluminescent device comprising the above material which has high luminescence efficiency, enhanced operating life time, and high purity of red chromaticity.

Abstract: The present invention relates to emitting compounds for organic electroluminescent device, particularly to porphines-platinum metal complex compounds represented by the following formula (1): wherein R1 and R2 are as defined in the specification. In addition, the present invention relates to an organic electroluminescent device comprising the above material which has high luminescence efficiency, enhanced operating life time, and high purity of red chromaticity.

Abstract: The present invention relates to luminescence materials for an organic electroluminescent device (OELD), and particularly to phenyl pyridine-iridium metal complex compounds of formula (1), and preparation method thereof.

Abstract: The present invention relates to antibiotics, functional cosmetics and functional foods comprising levulinic acid or its derivatives as effective ingredients. More particularly, the present invention relates to antibiotics comprising levulinic acid or its derivatives having antibiotic activities against various microorganisms including Gram positive bacteria, Gram negative bacteria, yeast and drug-resistant bacteria. Also, the present invention relates to functional cosmetics and functional foods comprising the same.