E. O. Platonova

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 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.

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.

The ruthenium pyrazolonate complex Ru(PMIP)2(PPh3)2: Synthesis, structure, and some properties

The new ruthenium(II) complex Ru(PMIP)2(PPh3)2 (HPMIP is 4-isobutyryl-3-methyl-1-phe-nylpyrazol-5-one) was obtained from RuCl2(PPh3)3 and Na(PMIP)(DME) (DME is dimethoxyethane). The structures of the complex obtained and the starting sodium pyrazolonate were determined by X-ray diffraction. The ruthenium pyrazolonate complex initiates metathetical norbornene polymerization producing high-molecular-weight polynorbornene in low yield.

Functionalized polynorbornenes with fragments of cholic acid and luminophore complexes of iridium(III) and copper(I) in side chains. Synthesis and photophysical properties

Copolymers containing fragments of cholic acid and luminophore complexes of iridium(III) and copper(I) in the side chains have been synthesized by metathesis polymerization. Photophysical properties of the obtained compounds have been investigated. Iridium-containing copolymers demonstrate intense photoluminescence of green, bluish-green and red colors. Copper-containing copolymers generate radiation of green and yellow-green colors. The color of photoluminescence of the metal-containing polymers is determined by the nature of copper(I) and iridium(III) complexes bonded to polymer chain.

Functionalized Polynorbornenes with Oligoether Units and Luminophoric Iridium(III) Complexes in Side Chains. Synthesis, Photophysical, and Biological Properties

Copolymers with oligoether units and luminophoric iridium(III) complexes in the side chains have been synthesized via metathesis polymerization. The copolymers containing different luminophoric iridium(III) complexes have exhibited strong green, blue-green, or red photoluminescence. The copolymers are soluble in water, forming micelles with average size 14‒20 nm. The copolymer with red photoluminescence has low cytotoxicity with respect to epidermoid human carcinoma cells (line A431).

Electroluminescent Iridium-Containing Functionalized Polynorbornenes Emitting Red Light

A new iridium(III) cyclometalated complex NBEpzIr(Tiq)2 {NBEpzH is 4-[(bicyclo[2.2.1]hept-5- en-2-yl)hydroxymethylidene]-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazole-3-on and TiqH is 1-(thien-2-yl)isoquinoline} was synthesized. Copolymers with carbazole and iridium-containing fragments in side chains were obtained on the basis of the synthesized monomer by the method of ring-opening metathesis polymerization. The copolymers exhibit intense photoluminescence and electroluminescence of deep red color.

Potassium carbazolyl complexes with coordinating solvents: Syntheses and crystal structures

The reaction of carbazole with KOH in dimethylformamide (DMF) at 75°C for 1.5 h affords CarbK(DMF) (CarbH is carbazole) in 90% yield. The crystallization of the compound from DME, CH3CN, and CD3CN gives complexes CarbK(DME)2, CarbK(DMF)(CH3CN), and CarbK(DMF)(CD3CN), respectively, whose structures are determined by X-ray diffraction analyses. The dissolution of CarbK(DMF)(CH3CN) in CD3CN results in the deuterium exchange in the bound solvent to form complex CarbK(DMF)0.5(CD2HCN)1.5, whose structure is also established by X-ray diffraction analysis.