760212-64-4

Upstream product

• 1137-68-4 2-(2'-pyridyl)benzimidazole 
• 106-37-6 1.4-dibromobenzene 
• 589-87-7 1,4-bromoiodobenzene 
• 760212-63-3 2-picolinic acid [2-(4-bromophenyl amino)-phenyl]-amide 

Relevant academic research and scientific papers

ORGANIC LIGHT-EMITTING DIODE COMPRISING DIFFERENT MATRIX COMPOUNDS IN THE FIRST AND SECOND ELECTRON TRANSPORT LAYER

The present invention is directed to matrix compounds and an organic light-emitting diode (OLED) comprising an emission layer and an electron transport layer stack of at least two electron transport layers, wherein a first electron transport layer and a second electron transport layer comprises at least one matrix compound, wherein the matrix compound or compounds of the first electron transport layer is/are different to the matrix compound or compounds of the second electron transport layer; and in addition, the first electron transport layer comprises a dopant of a lithium halide and/or lithium organic complex; and the second electron transport layer is free of a dopant; wherein at least one matrix compound of the second electron transport layer having the chemical formula Ia, Ib and/or Ic: (Ia) (Ib) (Ic) wherein Ar = substituted or unsubstituted arylene with 6 to 20 ring-forming carbon atoms; or carbazolylene; ET = substituted or unsubstituted aryl group with 13 to 40 ring-forming carbon atoms; or a substituted or unsubstituted heteroaryl group with 14 to 40 ring-forming atoms.

Ru-Pt and Ru-Pd heterobimetallic complexes based on a new ligand with two distinct chelate sites

A new ligand p-[N-2-(2′-pyridyl)benzimidazolyl]-[N-2-(2′- pyridyl)indolyl]-benzene (L1) has been synthesized and fully characterized. L1 has two distinct chelating sites: one N,N-chelate site and one N,C-chelate site. This ligand has been found to be very effective in selective binding to two different metal ions. Two new heterobimetallic complexes Ru-Pt and Ru-Pd using L1 as the bridging ligand have been successfully synthesized and fully characterized. To understand the mutual influence of the two metal centers on electronic and photophysical properties, the corresponding monometallic Ru(ii), Pt(ii) and Pd(ii) compounds have also been synthesized and investigated. All Ru(ii)-containing complexes have been found to be luminescent. Electronic communication between the two different metal centers in the heterobimetallic compounds was found to be weak. The Pt(ii) moiety appears to enhance the phosphorescent efficiency of the Ru(ii) unit while the Pd(ii) analogue has little influence.

NITROGEN-CONTAINING HETEROCYCLE DERIVATIVE AND ORGANIC ELECTROLUMINESCENT ELEMENT USING THE SAME

A novel derivative of heterocyclic compound having nitrogen atom with a structure made by bonding special groups to benzimidazole, a material for an organic electroluminescence (EL) device comprising the derivative of heterocyclic compound having nitrogen atom and an organic electroluminescence device comprising at least one organic compound layer containing a light emitting layer sandwiched between a pair of electrodes, wherein the device contains the derivative of heterocyclic compound having nitrogen atom. An organic EL device achieving elevation of luminance and of efficiency in light emission even under low driving voltage is obtainable by an employment of the derivative of heterocyclic compound having nitrogen atom for at least one layer composing organic compound layers of the EL device.