Ribbon-type columns linked to form a network are found in the crystal structure of 1, R = Br. This compound differs significantly from Kekulé-type analogue 2 terms its electron affinity and position UV/VIS absorption maximum. The monoselenium analogues 1 were also synthesized characterized.

Abstract In order to investigate an effective method for carrier injection into the phosphor of organic electroluminescent (EL)devices, we synthesized fac ‐tris(2‐phenylpyridine)iridium [Ir(ppy) 3 ] derivatives containing hole‐trapping moieties, such as diphenylamine, carbazole, and phenoxazine. Their photoluminescent maxima were observed around maximum Ir(ppy) . These values slightly shifted depending on moieties: redshifted due diphenylamine blueshifted carbazole Further, these moieties...

A BF(2) complex containing an octafluorotetracene moiety was synthesized as a new type of electron acceptor. This compound exhibits long-wavelength absorption based on the perfluorotetracene skeleton and high affinity due to its quadrupolar structure enhanced by fluorination. In crystal, molecules are arranged with short F...pi F...F contacts affording dense crystal packing. The exhibited n-type semiconducting behavior.

Abstract (Dibenzoylmethanato)boron difluoride derivatives containing triphenylamine moieties were synthesized as a new type of electron‐donor/π‐acceptor system. These compounds exhibited long‐wavelength absorptions in the UV/Vis spectra, and reversible oxidation reduction waves cyclic voltammetry experiments. Their amphoteric redox properties are based on their resonance hybrid forms, which positive charge is delocalized negative localized boron atoms. Molecular orbital (MO) calculations...

BF2 complexes containing tetracene and perylene moieties were synthesized as new types of electron-deficient arene compounds. These compounds exhibit long wavelength absorption high electron affinities, revealed through spectral electrochemical studies, due to their quadrupolar structures represented by resonance contributors. The complex exhibits an n-type semiconducting behavior. are acceptors functionalized chelation.

Abstract Terthiophene and bithiophene derivatives functionalized by BF 2 chelation were synthesized as a new type of electron acceptor, their properties compared to those bifuran biphenyl derivatives. These compounds are characterized quadrupolar structures due resonance contributors generated chelation. The derivative has strong character with the because hydrolytic analyses indicated that moiety larger on‐site Coulomb repulsion than others. terthiophene smaller addition thiophene spacer....

A macrocyclic tetramer of 2-phenyl-1,3,4-oxadiazole was synthesized, and its self-assembly investigated. The macrocycle stacked to form a one-dimensional (1D) columnar structure containing water molecules. nanotube self-assembled into bundle, which grew molecular wire. association the molecules in tubular cavity resulted shielding 1D chain by nanotube; these channels are promising candidates for nanotechnological applications.

Organoboron compounds containing curcumin (<italic>i.e.</italic>natural phenols) were synthesised as a new type of multifunctional organic dye.

Reactions of naphtho[b]cyclopropene with trithiocarbonyl derivatives in chloroform afforded 1,3-dihydrobenzo[2,3-c]thiophene moderate yields through a [2p + 2s] type cycloaddition process.The similar reaction dithiocarbonate compound gave recovery the starting material.A thiotropone resulted [8p adduct 5% yield.Solvent effects on product revealed that reactions proceeded via ionic intermediates.Naphtho[b]cyclopropene ( 1) is stable colorless crystalline material spite its large strain energy...

Abstract The title compounds were prepared and investigated for electron-transporting hole-blocking materials in organic electroluminescent (EL) devices. EL efficiencies of the phosphorescent devices indicated high performance ability compounds. A maximum external efficiency 18% was achieved a power luminous over 45 Lm W−1.

The synthesis, molecular structures, reactions, and properties of 4,5-diazafluorene derivatives have been studied because their potential applications in organic devices.These compounds similarities to 2,2′-bipyridyl 1,10-phenanthroline derivatives.They also exhibit unique reactivities different from these due the fluorene moieties.The 4,5-diazafluorenes widely investigated various research fields afford new functional materials such as electron-transporting materials, emitters, emissive...

A nonplanar molecule that forms stable ion radical salts is reported, demonstrating planar molecules are not a prerequisite for the preparation of organic conductors. The results cyclic voltammetry and X‐ray structural analysis presented single crystals cation salt dibenzo derivative 4,9‐bis(1,3,‐dithio‐2‐ylidene)‐4,9‐dihydronaphtho[2,3‐c][1,2,5]thiadiazole. This first to have been succesfully obtained from molecule.

Two polyfluorene derivatives containing a phenazasiline moiety and an electron acceptor were synthesized by the Suzuki coupling reaction.Molecular weight analysis showed that two polymers had approximately 14 9 fluorene units as well functional groups.Since these donor--acceptor systems, their absorption edges red-shifted compared to of polyfluorene.Cyclic voltammetry experiments indicated amphoteric redox behavior.Bulk heterojunction solar cells fabricated using films made fullerene...

Y. Yamashita, K. Ono, M. Tomura and Imaeda, Chem. Commun., 1997, 1851 DOI: 10.1039/A704375I

Bandartige Stapelstrukturen, die zu einem Netz verknüpft sind kennzeichnen Struktur von 1 , R = Br, im Kristall, das sich dem Kekulé‐Analogen 2 deutlich in der Elektronenaffinität und Lage des UV/VIS‐Absorptionsmaximums unter‐scheidet. Auch Monoselenanaloga wurden synthetisiert charakterisiert. magnified image

Abstract The reaction of ethyl 2-azabicyclo[2.2.1]hept-5-ene-3-carboxylate with aroyl chloride and the subsequent hydrolysis ester group provided 2-aroyl-2-azabicyclo[2.2.1]hept-5-ene-3-carboxylic acid derivatives, which underwent a stereospecific rearrangement giving 4-aroylamino-2-oxabicyclo[3.3.0]oct-7-en-3-ones by treatment trifluoroacetic acid. On other hand, 2-benzoyl-2-azabicyclo[2.2.1]hept-5-ene in heated benzene afforded 1-[(benzoylamino)methyl]-1,3-cyclopentadiene Diels–Alder...

Palladium(II) acetate catalyzed double substitution reaction of a bicyclo[2.2.2]octadiene derivative (1) with o-substituted iodobenzenes afforded six membered cyclic compounds (3b and 3c) via homo-conjugation type interaction accompanied by five-membered

Abstract The syntheses of a novel diphenyl-substituted thiophene, pyrrole, and furan fused at the 3- 4-positions with norbornadiene are described. Structures these molecules discussed on basis spectral properties by comparison those cyclohexene-fused derivatives. Single crystal X-ray structural analysis norbornadiene-fused thiophene as well PM3 calculations related compounds revealed that bond angles carbon atoms ring-junction heterocycles distorted.

Abstract Summary: Two types of bis(2,5‐diphenyl‐1,3,4‐oxadiazole)s, macrocyclic and acyclic, were prepared evaluated as electron‐transporting hole‐blocking materials in phosphorescent EL devices. Maximum efficiencies η ext = 10.4% at J 0.11 mA · cm −2 for the macrocycle 14.1% 3.01 acycle observed. X‐ray crystallographic analysis DSC measurements revealed a strong intermolecular interaction between macrocycles weaker interactions acycles. The characteristics depend on interactions. two...

Recrystallization of 1,4-dipropoxy-9,10-anthraquinone from hexane solution afforded two polymorphs: red prisms and yellow needles. X-ray crystallographic analyses revealed that the molecular arrang...