The current density-luminance-voltage characteristics of organic light-emitting devices ~OLEDs! with N ,N8-Bis~naphthalen-1-yl)-N ,N8-bis~phenyl! benzidine ~NPB! of various thicknesses as the hole transport layer have been investigated. It is found that for conventional structures of indium– tin–oxide/NPB/tris~8-hydroxyquinoline! aluminum (Alq3) ~60 nm!/LiF ~0.5 nm!/Al the optimal hole injectio...

In this work, we present our achievements in color tunability in novel multilayer organic light-emitting diodes (OLEDs) based on DCM (4-(Dicyanomethylene)-2-methyl-6-[p(dimethylamino)styryl]-4H-pyran) as red emitter doped in a composite PVK:TPD holetransporting layer, DPVBi (4,4′-Bis(2,2-diphenylvinyl)-1,1′-biphenyl) as a separate blue emitting layer, BAlq (aluminum bis(2-methyl-8-quinolinate)-...

An efficient and convenient method for synthesis of 2,6-bis (4-(dialkylamino) styryl)-4H-pyran-4-one starting from 4- (dialkylamino) benzaldehyde with 2,6-dimethyl-4H-pyran-4-onein the presence of MeONa as the base was described. Additionally, preparation of novel compounds with bis-DCM-type skeleton for application in organic light-emitting diodes was developed via reactio...

The antioxidant and antimicrobial activities of three kinds of strawberry ethanol extracts from Robus corchorifolius L. f. (RCL), Rubus parvifolius L. var. parvifolius (RPL), and Duchesnea chrysantha Miq. (DCM) were investigated. The RPL was highest (P<0.05) in phenolic, flavonoid, and anthocyanin contents. 2,2-Diphenyl-1-picrylhydrazyl and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid...

Tuning and controlling the solid-state luminescence of molecular solids play a key role in developing multi-color displays and tunable dye laser. In this work, we report the tunable blue and red luminescence by the formation of solvate crystals of 1,4-bis(5-phenyl-2-oxazolyl)benzene (POPOP) and 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM). Upon introduction of guest so...

Abstract The new Fe(II) complex [Fe(trident)(bmik)](ClO 4 ) 2 ( 1 (trident = bis(2-pyridylmethyl)benzylamine and bmik bis(1-methylimidazole)ketone) exhibits a change of magnetic moment in dichloromethane (DCM) solution upon addition pyridine which is attributed to the Coordination-Induced Spin State Switching effect (CISSS). By attaching photoisomerizable azopyridine sidegroup tridentate ligand...

Vitrimers open new possibilities in the reprocess of epoxy and other thermosets. However, direct heating is not practical on many occasions, waste vitrimers would cause great harm to environment. In this work, we propose use kraft lignin (KL) fabricate vitrimer with reprocessability environmental friendliness. The lignin-based was fabricated by blending epoxy-modified KL poly(ethylene glycol) b...

A method for the prediction of a suitable solvent for the extraction of pesticides is outlined. The procedure is based on the Hildebrand solubility parameter, delta(t). The solubility parameter is broken down into three individual components, which are calculated by the addition of group contributions. To demonstrate the applicability of the approach pressurized fluid extraction was used to ext...

The genus Chremistica Stål, 1870 is reported from the northeastern region of India for the first time. A new species, Chremistica ribhoi, is described from this region and male genitalia illustrations and scanning electron microscope photographs of the pygofer for C. ribhoi are presented. Observations on mass emergence of C. ribhoi are described.