Cyanopyridone-cored fluorophores with triphenylamine peripheries: From molecular design to OLED fabrication studies

Utilization of newly configured carbazole-cyanopyridone structural hybrids towards achieving high-performance cyan fluorescent organic light-emitting diodes

“…Materials Advances balance in OLEDs, 39,40 we used 3 wt% of dyes as dopants in the wide energy host material, CBP (4,4 0 -bis(N-carbazolyl)-1, 1 0 -biphenyl). Low dopant concentrations allowed easy charge transmission and prevented concentration quenching, ensuring EL colour purity.…”

“…Low dopant concentrations allowed easy charge transmission and prevented concentration quenching, ensuring EL colour purity. 38,39 ITO (120 nm)/PEDOT: PSS (35 nm)/CBP: 3 wt% Cz-CyP 1-7 (35 nm)/TPBi (30 nm)/LiF (0.5 nm)/Al (150 nm). Pre-patterned ITO-coated glass substrates were used as transparent anodes.…”

“…40 The energy level alignment, bipolar nature, triplet energy, and thermal stability of CBP make it a promising host for an efficient host-guest system. [38][39][40] CBP acts as the primary charge carrier and efficiently transfers excitons to dopant emitters. In addition, the dopant molecules effectively absorb the excitons generated by the host, turning them into the emission source.…”

Simple and Efficient Synthesis of Highly Functional 2-Oxonicotino­nitriles from 2-Chloronicotinonitriles

“…Methyl-2-oxo-1,2-dihydropyridine-3,4-dicarbonitrile 2g: yield 77%. The compound was synthesized by another method and described by us earlier[1].5,6-Dimethyl-2-oxo-1,2-dihydropyridine-3,4-dicarbonitrile 2h: yield 74%. The compound was synthesized by another method and described by us earlier[2].2-Oxo-2,5,6,7,8,9-hexahydro-1H-cyclohepta[b]pyridine-3,4-dicarbonitrile 2i:yield 82%.…”

“…Derivatives of 2-oxo-1,2-dihydropyridine-3-carbonitrile (2-oxonicotinonitrile, 3-cyanopyridone) are important representatives of heterocyclic compounds with practically important properties. These compounds have been used in many fields, including creation of organic light-emitting diodes (OLEDs), 1 dye-sensitized solar cells, 2 organometallic compounds, 3,4 organic dyes, 5 fluorescent tags for latent fingerprints (LFP) visualization, 5,6 chemosensors for cadmium(II), 7 copper(II) and nickel(II) ions, 8 nitrites, 6,9 a polaritysensitive fluorescent probe, 10 and an image-sensor colorant. 11 The tandem effect of the pyridone fragment and the carbonitrile group significantly enhances the emission properties of the molecules.…”