L. N. Bochkarev

Terbium-containing copolymers based on the norbornene functional derivatives. Synthesis, photoluminescent and electroluminescent properties

New carbazole- and terpyridine- containing norbornene derivatives were synthesized and structurally characterized. On the basis of these compounds by the method of metathesis polymerization copolymers were obtained with carbazole and terpyridine fragments in side chains. The synthesized copolymers react with terbium pyrazolonate complex to form the terbium-containing polymeric materials exhibiting the metalcentered photo- and electroluminescence.

Cyclometallated Iridium(III) Complex with the Norbornene Substituted Pyrazolonate Ligand and Related Copolymers: Syntheses, Structures, and Photophysical Properties

New cyclometallated iridium(III) complex (NBEpz)Ir(Ppy)2 · 2CH2Cl2 (I) (NBEpzH is 1-phenyl-3-methyl-4-(5-bicyclo[2.2.1]hept-5-en-2-yl)-5-pyrazolone, PpyH is 2-phenylpyridine) is synthesized and structurally characterized. Compound I undergoes metathesis polymerization and forms new iridium-containing copolymers. The photophysical properties of complex I and related copolymers are studied.

Cyclometallated Iridium(III) Complex with 2-(Benzo(b)thiophen-2- yl)pyridyl and Norbornene-Substituted Pyrazolonate Ligands and Related Electroluminescent Red Light-Emitting Polymers

New cyclometallated iridium(III) complex, (NBEpz)Ir(Btp)2 (I) (NBEpzH is 1-phenyl-3-methyl-4-(5-bicyclo[2.2.1]hept-5-en-2-yl)-5-pyrazolone, and BtpH is 2-(benzo[b]thiophen-2-yl)pyridine), is synthesized. The structure of the compound is determined by X-ray diffraction analysis (CIF file CCDC no. 1406737). Copolymers with the carbazole and iridium-containing fragments in the side chains (P1–P3) are prepared from monomer I using the ROMP method (ROMP is Ring-Opening Metathesis Polymerization). Their photoluminescence and electroluminescence properties are studied. Copolymers P1–P3 exhibit an intense photoluminescence and electroluminescence of red color. The maximum current efficiency (17.9 cd/A) and power efficiency (9.1 lm/W) are reached using emitter P2.

Iridium-containing polymers based on functionalized norbornenes as new efficient electroluminophores

The copolymer with carbazole and iridium-containing groups in the side chains (P1) and the terpolymer with additional organosilicon units (P2) were synthesized by the ring-opening metathesis polymerization (ROMP). The photoluminescence (PL) and electroluminescence (EL) properties of the synthesized polymeric materials were investigated. The iridium-containing terpolymer exhibited the most efficient EL characteristics: the maximum brightness is 1780 cd m−2 (21 V), the maximum current efficiency is 23.3 cd A−1 (13 V), and the maximum power efficiency is 6.4 lm W−1 (11 V). The color coordinates of the emission in the CIE (Commision Internationale de l’Eclairage) diagram (0.21, 0.71) correspond to the green color and remain virtually unchanged in the whole driving voltage range.

Complex of copper(I) with norbornene-substituted pyridinylbenzimidazole ligand and copper-containing carbochain copolymers based on this complex: Synthesis, photo- and electroluminescent properties

New complex of copper(I) with norbornene-substituted 1-H-2-pyridinylbenzimidazole ligand was synthesized. The compound obtained enters into a metathesis polymerization reaction to give carbochain coppercontaining copolymers exhibiting photo-and electroluminescent properties.

Copper-Containing Copolymers Based on the Norbornene Monomers. Synthesis, Photo-, and Electroluminescent Properties

New copper(I) complexes containing the norbornene-substituted phenanthroline ligand were synthesized. Based on these compounds, new carbon-chain copper-containing copolymers possessing the photo- and electroluminescent properties were obtained by the metathesis polymerization.

Cyclometallated iridium(III) complex with 2-(2,4-difluorophenyl)pyridyl and norbornene-substituted pyrazolonate ligands and related electroluminescent polymers

New cyclometallated iridium(III) complex, NBEPzIr(Dfppy)2 · 2CH2Cl2 (I) (NBEPzH is 1-phenyl-3-methyl-4-(5-bicyclo[2.2.1]hept-5-en-2-yl)-5-pyrazolone, and DfppyH is 2-(2,4-difluorophenyl)pyridine), is synthesized and structurally characterized. Copolymers with carbazole and iridium-containing fragments in side chains (P1–P4) are obtained from monomer I by the ROMP method (ROMP is Ring-Opening Metathesis Polymerization). Their photoluminescence and electroluminescence properties are studied. Copolymers P1–P4 exhibit the green electroluminescence. The maximum current efficiency (2.60 cd/A) and power efficiency (0.63 Lm/W) are reached using emitter P3.

Electroluminescent lanthanide-containing polymers

The data on the synthesis and physicochemical and photo- and electroluminescent properties of carbochain linear polymers containing ions of rare-earth metals bound via chemical or coordination bonds to the polymer chain are summarized. The effects of the ligand environment at lanthanide atoms and the structures of the polymers on their luminescence activity are considered. Possible approaches to increase the efficiency of electroluminescence of polymer lanthanide emitters are discussed.

Reactions of CpCuPPh3 with Lanthanides and Their Compounds

CpCuPPh3 reacts with Pr, Er, Yb, Cp2Yb, and SmI2(THF)4 to form, in high yields, lanthanide cyclopentadienyl derivatives Cp2Yb, Cp3Ln (Ln = Pr, Er, Yb), and CpSmI2(THF)2. The initial agent CpCuPPh3 can be prepared in 95-98% yield by the reaction of t-BuOCu with CpH in the presence of PPh3.

Cyclometallated iridium(III) complex with 1-phenylisoquinoline and norbornene-substituted pyrazolonate ligands and related electroluminescent polymers

A new cyclometallated iridium(III) complex NBEpzIr(Piq)2 (I) (NBEpzH is 1-phenyl-3-methyl- 4-(5-bicyclo[2.2.1]hept-5-en-2-yl)-5-pyrazolone, PiqH is 1-phenylisoquinoline) is synthesized. The structure of the compound is determined by X-ray diffraction analysis (СIF file CCDC no. 1521037). Copolymers with the carbazole and iridium-containing fragments in the side chains (P1–P3) are prepared from monomer I by the ring-opening metathesis polymerization method. Their photoluminescence and electroluminescence properties are studied. Copolymers P1–P3 exhibit an intense photoluminescence and electroluminesce of red color. The maximum luminance (3010 cd/m2) and current efficiency (15.1 cd/A) are achieved for emitter P2.