57477-09-5

Upstream product

• 106-37-6 1.4-dibromobenzene 
• 136805-54-4 pyridin-2-ylboronic acid dimethyl ester 
• 17997-47-6 2-tri-n-butylstannylpyridine 
• 109-09-1 2-chloropyridine 
• 624-38-4 para-diiodobenzene 
• 13737-05-8 2-trimethylstannylpyridine 
• 109-04-6 2-bromo-pyridine 
• 4612-26-4 1,4-Phenyldiboronic acid 

Relevant academic research and scientific papers

Charge delocalization of 1,4-benzenedicyclometalated ruthenium: A comparison between tris-bidentate and bis-tridentate complexes

A dimetallic biscyclometalated ruthenium complex, [(bpy) 2Ru(dpb)Ru(bpy)2]2+ (bpy = 2,2′- bipyridine; dpb = 1,4-di-2-pyridylbenzene), with a tris-bidentate coordination mode has been prepared. The electronic properties of

Electronic Properties of Oxidized Cyclometalated Diiridium Complexes: Spin Delocalization Controlled by the Mutual Position of the Iridium Centers

Four cyclometalated diiridium complexes, with IrCp*Cl (Cp=η5-C5Me5 ?) termini bridged by 1,4- and 1,3-bis(p-tolyliminoethyl)benzene (1, 2), or 1,4- and 1,3-bis(2-pyridyl)benzene (3, 4), were prepared and characterized by nuclear magnetic resonance (NMR) spectroscopy and single-crystal X-ray diffraction (complexes 1, 2, and 4). The two iridium centers in complexes 1 and 3 are thus bound at the central benzene ring in the para-position (trans-Ir2), whereas those in complexes 2 and 4 are in the meta-position (cis-Ir2). Cyclic voltammograms of all four complexes show two consecutive one-electron oxidations. The potential difference between the two anodic steps in 1 and 3 is distinctly larger than that for 2 and 4. The visible–near-infrared (NIR)–short-wave infrared (SWIR) absorption spectra of trans-Ir2 monocations 1+ and 3+ are markedly different from those of cis-Ir2 monocations 2+ and 4+. Notably, strong near-infrared electronic absorption appears only in the spectra of 1+ and 3+ whereas 2+ and 4+ absorb only weakly in the NIR-SWIR region. Combined DFT and TD-DFT calculations have revealed that (a) 1+ and 3+ (the diiridium-benzene trans-isomers) display the highest occupied spin-orbitals (HOSO) and the lowest unoccupied spin-orbital (LUSO) evenly delocalized over both molecule halves, and (b) their electronic absorptions in the NIR-SWIR region are attributed to mixed metal-to-ligand and ligand-to-ligand charge transfers (MLCT and LLCT). In contrast, cis-isomers 2+ and 4+ do not feature this stabilizing π-delocalization but a localized mixed-valence state showing a weak intervalence charge-transfer (IVCT) absorption in the SWIR region.

Cathode electrochromic compound for electrochromic device

An electrochromic medium comprises a cathode electrochromic compound, wherein the structural formula of the cathode electrochromic compound is as shown in the specification, R1 is selected from normal alkyl or heterogeneous alkyl containing 1-20 carbon atoms; each of R2-R14 is independently selected from H, alkyl, cycloalkyl, polycyclic alkyl, aryl, heterocyclic alkyl, aromatic alkyl and alkaryl containing 1-50 carbon atoms or alkyl, cycloalkyl, polycyclic alkyl, aryl, heterocyclic alkyl, aromatic alkyl and alkaryl containing 1-50 carbon atoms and halogen, N, O, S, Si, P or unsaturated bond groups; X1 is selected from acetate anion, methyl phenyl acetate sulfonate anion, tetrafluoroborate anion, hexafluoroborate anion, tetraphenyl borate anion, trifluoro mesylate anion, perchlorate anion, bis-oxalate borate anion, oxalate difluoroborate anion, bis(trifluoromesyl) imide anion and tri(trifluoromesyl) methyl anion. The cathode electrochromic compound has the advantages that good electrochemical reversibility is achieved, fast color changing and good stability are achieved, the lowest value of visible light transmittance is small, and the like.

BORON-CONTAINING COMPOUND AND APPLICATION THEREFOR

PROBLEM TO BE SOLVED: To provide a boron-containing compound exhibiting excellent mobility by preparing a structure containing 2 or more nitrogen atoms in a center part of a skeleton and further crosslinked by boron. SOLUTION: There is provided a boron-containing compound represented by the following chemical formula (1), where rings X1 and X2 may be the same or different and represent a five-membered ring which may be substituted or a condensed ring having the five-membered ring, Y1 represents a condensed heterocyclic ring having a structure containing 2 or more nitrogen atoms where an azo group, a heterocycle or 2 or more rings are ring condensed and R1 to R6 may be the same or different and represent hydrogen, a halogen or a monovalent substituent. SELECTED DRAWING: None COPYRIGHT: (C)2018,JPOandINPIT

Two fluorescent cyclopalladated arylpyrazine complexes: synthesis, crystal structures and application in the double Suzuki coupling of N-heteroaryl halides with 1,4-benzenediboronic acid

Abstract Two 2-dicyclohexylphosphino-2',6'-dimethoxybiphenyl (Sphos) adducts of cyclopalladated arylpyrazine complexes have been synthesized and characterized. Additionally, the structures of both complexes were determined by single-crystal X-ray analysis

Palladium nanoparticles catalyzed Suzuki cross-coupling reactions in ambient conditions

An efficient pathway to synthesize biaryls and terphenyls through ligand-free palladium nanoparticles (PdNPs) catalyzed Suzuki cross-coupling reactions has been developed. Mild reaction conditions, high yields of desired products, absence of inert atmosphere and short reaction times are the notable features of this method.

Synthesis of pyridine-borane complexes via electrophilic aromatic borylation

Pyridine-borane complexes were synthesized from 2-arylpyridines through an electrophilic aromatic borylation reaction with BBr3. The intermediate 2-(2-dibromoborylaryl)pyridines were stable enough to be handled in air and served as the syntheti

Aromatic interactions in the synthesis and conformation of two collapsible tetracationic cyclophanes

The conformations of tetracationic paracyclophane and metacyclophane derivatives containing quaternary salts of para-2,2-diazaterphenyl were investigated. The molecules were synthesized as the bromide and hexafluorophosphate salts which allowed solubility in aqueous and organic solvents. Molecular mechanics led to the notion that these cyclophanes would populate collapsed and open conformations in water and only populate open conformers in organic solvent. VT NMR studies indicated that the open and the collapsed conformers did not exchange on the NMR timescale. Large, positively charged clefts in one of these conformers bound flat anions between pyridinium rings as would molecular-scale tweezers.