66228-76-0

Upstream product

• 79109-88-9 [4-(2,2-Dichloro-1-fluoro-vinyl)-phenylethynyl]-trimethyl-silane 
• 75-77-4 chloro-trimethyl-silane 
• 935-14-8 1,4-diethynylbenzene 
• 4526-07-2 1,4-bis(trimethylsilyl)-1,3-butadiyne 
• 589-87-7 1,4-bromoiodobenzene 
• 994-89-8 tributylethynyltin 
• 16116-78-2 (4-bromophenyl)(trimethylsilyl)acetylene 
• 1122-91-4 4-bromo-benzaldehyde 
• 77123-57-0 4-[(trimethylsilyl)ethynyl]bezaldehyde 
• 1066-54-2 trimethylsilylacetylene 
• 164467-29-2 1-(2,2-dibromoethenyl)-4-trimethylsilylethynyl benzene 
• 539021-46-0 3-(4-((trimethylsilyl)ethynyl)phenyl)prop-2-yn-1-ol 
• 2425-81-2 phen-1,4-ylenbis(magnesiumbromid) 
• 58229-01-9 1-Bromo-4-(2,2-dichloro-1-fluoro-vinyl)-benzene 

Downstream Products

• 886989-36-2 4-[p-(p-{trimethylsilylethynyl}phenylethynyl)phenyl]-2-methyl-3-butyn-2-ol 
• 346671-40-7 ((CH₃)3SiC₂C₆H₄C₂(P(C₂H₅)3)2PdC₂)3C₆H₃ 
• 1000864-06-1 C₆₂H₉₀O₂Si₂ 
• 1035343-16-8 1-iodo-2,5-didodecyloxy-4-{[(4-trimethylsilylethynyl)phenyl]ethynyl}benzene 
• 1262134-07-5 1,4-diethoxy-2,5-bis(4-bromophenyleethynyl)benzene 
• 256391-99-8 Ru(C_.tplbond.CC₆H₄C_.tplbond.CSiMe₃)(PPh₃)2Cp 
• 919076-61-2 1,4-bis((4-((trimethylsilyl)ethynyl)phenyl)ethynyl)benzene 
• 910467-54-8 4-((4-((4-((trimethylsilyl)ethynyl)phenyl)ethynyl)phenyl)ethynyl)aniline 
• 1431042-84-0 2-chloro-5-((4-((5-methylthiophen-2-yl)ethynyl)phenyl)ethynyl)thiophene 
• 1431042-97-5 1-(5-((4-((5-methoxythiophen-2-yl)ethynyl)phenyl)ethynyl)thiophen-2-yl)ethanone 
• 1431043-00-3 2-methoxy-5-((4-((5-methylthiophen-2-yl)ethynyl)phenyl)ethynyl)thiophene 
• 1431043-08-1 2-((5-((4-((5-methoxythiophen-2-yl)ethynyl)phenyl)ethynyl)thiophen-2-yl)methylene)malononitrile 
• 1431042-92-0 1-(5-((4-((trimethylsilyl)ethynyl)phenyl)ethynyl)thiophen-2-yl)ethanone 
• 1431042-95-3 ((4-((5-methoxythiophen-2-yl)ethynyl)phenyl)ethynyl)trimethylsilane 

Relevant academic research and scientific papers

Gold(i)-catalyzed cross-coupling reactions of aryldiazonium salts with organostannanes

Gold(i)-catalyzed cross-coupling reactions of aryldiazonium salts with organostannanes are described. This redox neutral strategy offers an efficient approach to diverse biaryls, vinyl arenes and arylacetylenes. Monitoring the reaction with NMR and ESI-MS provided strong evidence for the in situ formation of Ph3PAuIR (R = aryl, vinyl and alkynyl) species which is crucial for the activation of aryldiazonium salts.

One-pot transformation of Me3Si-/Ph2P(O)-protected ethynes to unsymmetrical arylethynes

Me3Si-/Ph2P(O)-protected ethynes were successfully transformed to unsymmetrical arylethynes via a one-pot Ph2P(O)-deprotection/ [Pd(dppf)Cl2]-catalysed coupling and one-pot Me3Si-deprotection/Sonogash

A Rotaxane-like Cage-in-Ring Structural Motif for a Metallosupramolecular Pd6L12 Aggregate

A BODIPY-based bis(3-pyridyl) ligand undergoes self-assembly upon coordination to tetravalent palladium(II) cations to form a Pd6L12 metallosupramolecular assembly with an unprecedented structural motif that resembles a rotaxane-like cage-in-ring arrangement. In this assembly the ligand adopts two different conformations—a C-shaped one to form a Pd2L4 cage which is located in the center of a Pd4L8 ring consisting of ligands in a W-shaped conformation. This assembly is not mechanically interlocked in the sense of catenation but it is stabilized only by attractive π-stacking between the peripheral BODIPY chromophores and the ligands’ skeleton as well as attractive van der Waals interactions between the long alkoxy chains. As a result, the co-arrangement of the two components leads to a very efficient space filling. The overall structure can be described as a rotaxane-like assembly with a metallosupramolecular cage forming the axle in a metallosupramolecular ring. This unique structural motif could be characterized via ESI mass spectrometry, NMR spectroscopy, and X-ray crystallography.

Direct Enzymatic Branch-End Extension of Glycocluster-Presented Glycans: An Effective Strategy for Programming Glycan Bioactivity

The sequence of a glycan and its topology of presentation team up to determine the specificity and selectivity of recognition by saccharide receptors (lectins). Structure–activity analysis would be furthered if the glycan part of a glycocluster could be efficiently elaborated in situ while keeping all other parameters constant. By using a bacterial α2,6-sialyltransferase and a small library of bi- to tetravalent glycoclusters, we illustrate the complete conversion of scaffold-presented lactoside units into two different sialylated ligands based on N-acetyl/glycolyl-neuraminic acid incorporation. We assess the ensuing effect on their bioactivity for a plant toxin, and present an analysis of the noncovalent substrate binding contacts that the added sialic acid moiety makes to the lectin. Enzymatic diversification of a scaffold-presented glycan can thus be brought to completion in situ, offering a versatile perspective for rational glycocluster engineering.

Photophysical Properties of Oligo(phenylene ethynylene) Iridium(III) Complexes Functionalized with Metal-Anchoring Groups

The electrochemical and photophysical properties of a family of conjugated ligands and their iridium(III) cyclometallated complexes are described. They consist of a series of monocationic IrIII bis-2-phenylpyridine complexes with p-phenylethynyl-1,10-phenanthroline ligands of different length. The structure of these ligands includes terminal acetylthiol or pyridine groups, which can provide good electrical contacts between metal electrodes. Cyclic voltammetry, absorption and emission spectroscopy, laser flash photolysis and density functional theory calculations reveal that the high conjugation of the diimine ligand affords small energy gaps between the frontier orbitals. Nevertheless, the nature of the terminal substituents and the extent of the conjugation in the diimine ligand have little influence on the photophysical features at room temperature. The spectroscopic data and theoretical calculations agree that the charge-transfer nature of the emitting excited state is maintained along the series at room temperature, whereas in rigid matrices ligand-centred states also contribute to the low-temperature emission. The good conducting features of the diimine ligands, the small dependence of the HOMO-LUMO (HOMO = highest occupied molecular orbital, LUMO = lowest unoccupied molecular orbital) gaps of these complexes on the ligands and the charge-transfer nature of the emitting excited state make these complexes promising test beds for the study of photoconducting phenomena in molecular junctions.

Compound has the negative light dispersion, negative dispersion of this compound-containing composition and containing the composition for preparing anisotropic optical (by machine translation)

The invention relates to a kind of reverse wdxrf compound, containing the compound reverse of wavelength dispersion composition and containing the optical anisotropic body. According to the present invention the reverse of wavelength dispersion composition is capable of providing a stronger and more stable reverse wdxrf nature, and can offer excellent optical performance of the optical anisotropic body. (by machine translation)

COMPOUNDS HAVING NEGATIVE OPTICAL DISPERSION, NEGATIVE OPTICAL DISPERSION COMPOSITION COMPRISING THE COMPOUNDS, AND OPTICALLY ANISOTROPIC BODY COMPRISING THE COMPOSITION (As Amended)

The present invention relates to a reverse wavelength dispersion compound, a reverse wavelength dispersion composition including the same, and an optically anisotropic body including the same. The reverse wavelength dispersion composition according to the present invention can provide a stronger and more stable reverse wavelength dispersion property, and makes it possible to provide an optically anisotropic body having excellent optical properties.

COMPOSITION FOR MANUFACTURING OPTICAL ELEMENTS WITH NEGATIVE OPTICAL DISPERSION AND OPTICALLY ANISOTROPIC BODY MANUFACTURED THEREFROM

The present invention relates to a composition for manufacturing optical elements with negative optical dispersion, and an optically anisotropic body prepared therefrom. According to the present invention, the optically anisotropic body showing stable reverse wavelength dispersion can be prepared more simply by using the composition for optical elements, and it is possible to apply the same to liquid crystal display devices as an optical film such as a thin-layer broadband λ/4 plate.

Arrays of Molecular Rotors with Triptycene Stoppers: Surface Inclusion in Hexagonal Tris(o -phenylenedioxy)cyclotriphosphazene

A new generation of rod-shaped dipolar molecular rotors designed for controlled insertion into channel arrays in the surface of hexagonal tris(o-phenylenedioxy)cyclotriphosphazene (TPP) has been designed and synthesized. Triptycene is used as a stopper intended to prevent complete insertion, forcing the formation of a surface inclusion. Two widely separated 13C NMR markers are present in the shaft for monitoring the degree of insertion. The structure of the two-dimensional rotor arrays contained in these surface inclusions was examined by solid-state NMR and X-ray powder diffraction. The NMR markers and the triptycene stopper functioned as designed, but half of the guest molecules were not inserted as deeply into the TPP channels as the other half. As a result, the dipolar rotators were distributed equally in two planes parallel to the crystal surface instead of being located in a single plane as would be required for ferroelectricity. Dielectric spectroscopy revealed rotational barriers of ～4 kcal/mol but no ferroelectric behavior.

Combined spectroscopic and quantum chemical study of [trans-Ru(C≡CC6H4R1-4)2(dppe)2]n+ and [trans-Ru(C≡CC6H4R1-4)(C≡CC6H4R2-4)(dppe)2]n+ (n = 0, 1) complexes: Interpretations beyond the lowest energy conformer paradigm

The reaction of trans-RuCl(C≡CC6H4R1-4)(dppe)2 (2: R1 = Me (a), C5H11 (b), OMe (c), CO2Me (d), NO2 (e), C≡CSiMe3 (f), C≡CBut (g), NH2 (h)), prepared in situ from reactions of [RuCl(dppe)2]OTf ([1]OTf) with terminal alkynes in CH2Cl2 solutions containing 1,8-diazabicycloundec-7-ene (DBU) and TlBF4, provides a convenient and rapid route to bis(acetylide) complexes trans-Ru(C≡CC6H4R1-4)2(dppe)2 (3a-h) and trans-Ru(C≡ CC6H4R1-4)(C≡CC6H4R2-4)(dppe)2 (4, R1 = C≡CSiMe3, R2 = NH2; 5, R1 = CO2Me, R2 = NH2; 6, R1 = CO2Me, R2 = OMe). However, even in the absence of the chloride abstracting reagent, more strongly electron donating substituents (e.g., R1 = OMe (2c), NH2 (2h)) promote sufficient ionization of the Ru-Cl bond in trans-RuCl(C≡CC6H4R -4)(dppe)2 to lead to slow conversion to bis(alkynyl) complexes 3c,h in the presence of excess alkyne and DBU. Desilylation of 2f and 3f affords 2i and 3i (R1 = C≡CH), respectively. The molecular structures of 3a-d,f-i have been determined and are reported together with the structures of the monoalkynyl complexes 2f,g,i and compared with related compounds from the literature. Complexes 3a-i and 4-6 undergo one reversible electrochemical oxidation process, which can be attributed to depopulation of an orbital with significant alkynyl ligand character. The one-electron-oxidation products [3f]?+, [3h]?+, [4]?+, and [5]?+, chosen to serve as representative examples of this family of complexes, each exhibit a series of NIR absorptions between 15000 and 5000 cm-1 which on the basis of TDDFT calculations cannot be attributed to a single, static lowest energy molecular structure. Rather, the transitions that are responsible for the absorption band envelope have varying degrees of LMCT and inter-alkynyl ligand IVCT or MLCT character that depend not only on the nature of the Rn groups but also on the ensemble of thermally populated molecular conformers in solution with various relative orientations of the metal fragment and arylethynyl moieties. (Figure Presented)