Disclosed is an organic EL device comprising an electroluminescent layer having a single layer or a multilayered structure of two or more layers, the electroluminescent layer containing a pyridine derivative represented by the formula (1):
wherein Ar1 represents an aryl group, m represents an integer of 1 to 5, Φ represents a group represented by the formula (1a) :
(wherein Ar2 represents an aryl group, and p represents an integer of 1 to 5),
or the formula (1b):
(wherein Ar3 represents an aryl group, and q represents an integer of 1 to 5), and n represents an integer of 0 to 2. The organic EL device is excellent in luminescent efficiency, luminance and durability, and emits blue light with improved luminescent efficiency and luminance, which are the same as those of other colors, and is also is excellent in durability.
Disclosed is an organic EL device comprising an electroluminescent layer having a single layer or a multilayered structure of two or more layers, the electroluminescent layer containing a pyridine derivative represented by the formula (1):
wherein Ar
1
represents an aryl group, m represents an integer of 1 to 5, Φ represents a group represented by the formula (1a):
(wherein Ar
2
represents an aryl group, and p represents an integer of 1 to 5),
or the formula (1b):
(wherein Ar
3
represents an aryl group, and q represents an integer of 1 to 5), and n represents an integer of 0 to 2. The organic EL device is excellent in luminescent efficiency, luminance and durability, and emits blue light with improved luminescent efficiency and luminance, which are the same as those of other colors, and is also is excellent in durability.
Homogeneous Palladium Catalyst Suppressing Pd Black Formation in Air Oxidation of Alcohols
found to be excellent ligands with Pd(OAc)2 in the palladium-catalyzed air (balloon) oxidation of alcohols in toluene at 80 degrees C. Comparison with structurallyrelatedpyridine ligands revealed that introduction of the 2,3,4,5-tetraphenylphenyl substituent at the 3-position of pyridine ring effectively suppresses the Pd black formation, maintaining the catalytic activity for a long time to give aldehydes