Category: 74029-40-6

Safety of 1,4-Diethynyl-2,5-dimethoxybenzeneOn May 3, 2019 ,《Synthesis of Alkynyl Sulfides by Copper-Catalyzed Thiolation of Terminal Alkynes Using Thiosulfonates》 appeared in Organic Letters. The author of the article were Kanemoto, Kazuya; Yoshida, Suguru; Hosoya, Takamitsu. The article conveys some information:

A mild and odorless copper-catalyzed thiolation of terminal alkynes with thiosulfonates is described. The broad substrate scope provides convenient access to a wide variety of sulfur-containing heterocycles. In particular, divergent benzoheteroles are efficiently prepared in a simple manner by thiolation of ethynylbenzenes bearing ortho-nucleophilic functional groups followed by iodocyclization. In the experiment, the researchers used many compounds, for example, 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Safety of 1,4-Diethynyl-2,5-dimethoxybenzene)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers. Ethers lack the hydroxyl groups of alcohols. Without the strongly polarized O―H bond, ether molecules cannot engage in hydrogen bonding with each other. Safety of 1,4-Diethynyl-2,5-dimethoxybenzene

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Category: ethers-buliding-blocksOn June 9, 2020, Zhu, Junli; Chu, Ming; Chen, Zuowei; Wang, Liquan; Lin, Jiaping; Du, Lei published an article in Chemistry of Materials. The article was 《Rational Design of Heat-Resistant Polymers with Low Curing Energies by a Materials Genome Approach》. The article mentions the following:

Designing high-temperature polymers with excellent processability is a long-standing challenge due to the implacable contradiction between high thermal stability and low curing energy. Traditional designs based on scientific intuition and trial-and-error experiments have not been efficient strategies for the discovery of new heat-resistant resins. In this work, we developed a materials genome approach to facilitate the design of new heat-resistant resins with the desired properties. By defining the gene and extracting the “”genetic”” features, we proposed a two-step strategy to screen candidate resins obtained from combinations of genes. A new kind of heat-resistant resin was predicted by rapid screening and was further verified by theor. simulations and exptl. studies. The basic framework developed for the present materials genome approach can be generalized for the rapid design of other high-performance materials. The experimental process involved the reaction of 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Category: ethers-buliding-blocks)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.Category: ethers-buliding-blocksAlthough ethers resist hydrolysis, they are cleaved by hydrobromic acid and hydroiodic acid. Hydrogen chloride cleaves ethers only slowly.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

In 2012,Analytical Methods included an article by Chu, Chengchao; Wang, Xiu; Li, Shuai; Ge, Shenguang; Ge, Lei; Yu, Jinghua; Yan, Mei. Recommanded Product: 1,4-Diethynyl-2,5-dimethoxybenzene. The article was titled 《Synthesis, characterization of a novel phenyleneethynylene derivative and application in a fluorescence DNA sensor》. The information in the text is summarized as follows:

In this paper, a novel phenyleneethynylene derivative 4,4′-(2,5-dimethoxy-1,4-phenylene)bis(ethyne-2,1-diyl) dibenzoic acid (p-acid) was synthesized. IR spectroscopy (IR), NMR, photoluminescence (PL) spectroscopy and UV visible (UV-vis) spectroscopy were applied to characterize p-acid. The p-acid doped silica nanoparticle (p-acid@SiO2) was assembled in layer-by-layer (LBL) self-assembling processes using tetraethoxysilane (TEOS). Scanning electron microscope (SEM) and transmission electron microscope (TEM) were applied to characterize p-acid@SiO2. To research the practical applicability, a sample DNA sensor was constructed using p-acid@SiO2 label, in which the PL intensity response was proportion to the target-DNA (S2) concentration in the range of 0.05-1000 fM, with a detection limit of 20 pM. Furthermore, the DNA sensor showed high specificity, excellent stability, and good reproducibility. The p-acid@SiO2-based DNA sensor can also provide potential application for detection of other pathogen DNA. In the experimental materials used by the author, we found 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Recommanded Product: 1,4-Diethynyl-2,5-dimethoxybenzene)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.Ethers do have nonbonding electron pairs on their oxygen atoms, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds. Recommanded Product: 1,4-Diethynyl-2,5-dimethoxybenzene The ability to form hydrogen bonds with other compounds makes ethers particularly good solvents for a wide variety of organic compounds and a surprisingly large number of inorganic compounds.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

In 2015,Dalton Transactions included an article by Figueira, Joao; Czardybon, Wojciech; Mesquita, Jose Carlos; Rodrigues, Joao; Lahoz, Fernando; Russo, Luca; Valkonen, Arto; Rissanen, Kari. Recommanded Product: 74029-40-6. The article was titled 《Synthesis, characterization and solid-state photoluminescence studies of six alkoxy phenylene ethynylene dinuclear palladium(II) rods》. The information in the text is summarized as follows:

A rare family of six discrete binuclear [PdCl(PEt3)2] phenylene ethynylene rods with alkoxy side chains (methoxy, ethoxy and heptoxy) were developed, and their solid-state photoluminescence results were presented and discussed. The shorter bridging ligands are H-CC-C6H2(R)2-CC-H, where R = H, OCH3, OC2H5, and OC7H15, whereas the longer ones are based on H-CC-C6H4-CC-C6H2(R)2-CC-C6H4-CC-H, where R = OCH3, OC2H5. These ligands display increasing length in both the main dimension (backbone length) as well as the number of carbons in the side chains (R, alkoxide side chain) that stem from the central phenylene moiety. The x-ray crystal structures of two of the prepared complexes are reported: one corresponds to a shorter rod, 1,4-bis[trans-(PEt3)2ClPd-CC]-2,5-diethoxybenzene (6c), while the 2nd one is associated with a longer rod, the binuclear complex 1,4-bis[trans-(PEt3)2ClPd-4-(-CC-C6H4-CC)]-2,5-diethoxybenzene (7c). All new compounds were characterized by NMR spectroscopy (1H, 13C{1H} and 31P{1H}) as well as ESI-MS(TOF), EA, FTIR, UV-visible, cyclic voltammetry and solid-state photoluminescence. The authors’ work shows the influence of the alkoxy side chains on the electronic structure of the family of binuclear Pd rods by lowering its oxidation potential. In addition to this, the increase of the length of the bridge results in a higher oxidation potential. Solid state photoluminescence results indicate that Pd complexes were characterized by a marked decrease in both the emission intensity and the fluorescence lifetime values as compared to their ligands. This behavior could be due to some degree of ligand-to-metal charge transfer. The experimental part of the paper was very detailed, including the reaction process of 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Recommanded Product: 74029-40-6)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.Ethers do have nonbonding electron pairs on their oxygen atoms, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds. The ability to form hydrogen bonds with other compounds makes ethers particularly good solvents for a wide variety of organic compounds and a surprisingly large number of inorganic compounds.Recommanded Product: 74029-40-6

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Resta, C.; Pescitelli, G.; Di Bari, L. published an article on January 31 ,2018. The article was titled 《Impact and amplification of chirality in the aggregation of leucine-appended poly(p-phenylene ethynylene) (PPE)》, and you may find the article in European Polymer Journal.Related Products of 74029-40-6 The information in the text is summarized as follows:

A leucine-appended poly(p-phenyleneethynylene) (PPE) was prepared in enantiomeric stereoregular (L-1 and D-1) and stereorandom (rac-1) forms. The solution aggregates of L-1, D-1, rac-1, and mixtures of L-1/D-1, were characterized by absorption, electronic CD and emission spectra. Both rac-1 and L-1/D-1 mixtures are more prone to aggregate than L-1 and D-1. Upon aggregating, the enantiomeric mixtures manifest an apparent majority-rules effect, which is mostly due to the greater tendency to form heterochiral aggregates with respect to homochiral ones. The impact of chirality on the aggregation behavior of the aminoacid-appended PPE is demonstrated. The experimental part of the paper was very detailed, including the reaction process of 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Related Products of 74029-40-6)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers. Ethers lack the hydroxyl groups of alcohols. Without the strongly polarized O―H bond, ether molecules cannot engage in hydrogen bonding with each other. Related Products of 74029-40-6

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Van Averbeke, Bernard; Beljonne, David published their research in ChemPhysChem on December 7 ,2009. The article was titled 《Energy Transport along Conjugated Polymer Chains with Extended Radiative Lifetimes: A Theoretical Study》.Related Products of 74029-40-6 The article contains the following contents:

The ability to improve exciton diffusion lengths is a key issue in optimizing many opto-electronic devices based on conjugated polymers. On the basis of quantum-chem. calculations, we investigate a strategy consisting of extending the radiative lifetime of energy carriers through incorporation along the polymer backbone of repeating units with forbidden optical transition. The results obtained for poly(p-phenylenebutadiyne), PPE, and poly(p-triphenylenebutadiyne), PTPE, show that the larger number of hops performed by the electronic excitations during their lifetime in PTPE is compensated by the smaller hopping length (associated with the reduced conjugation length), so that similar on-chain diffusion lengths are predicted in both polymers. The results came from multiple reactions, including the reaction of 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Related Products of 74029-40-6)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.Oxygen is more electronegative than carbon, thus the alpha hydrogens of ethers are more acidic than those of simple hydrocarbons. Related Products of 74029-40-6 They are far less acidic than alpha hydrogens of carbonyl groups (such as in ketones or aldehydes), however.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Wuttke, Evelyn; Pevny, Florian; Hervault, Yves-Marie; Norel, Lucie; Drescher, Malte; Winter, Rainer F.; Rigaut, Stephane published an article on February 6 ,2012. The article was titled 《Fully Delocalized (Ethynyl)(vinyl)phenylene Bridged Triruthenium Complexes in up to Five Different Oxidation States》, and you may find the article in Inorganic Chemistry.Application In Synthesis of 1,4-Diethynyl-2,5-dimethoxybenzene The information in the text is summarized as follows:

Triruthenium [(dppe)2Ru{-CC-1,4-C6H2-2,5-R2-CH:CH-RuCl(CO)(PiPr3)2}2]n+ (4a, R = H; 4b, R = OMe) containing unsym. (ethynyl)(vinyl)phenylene bridging ligands and displaying five well-separated redox states (n = 0-4) are compared to their bis(alkynyl)ruthenium precursors (dppe)2Ru{-CC-1,4-C6H2-2,5-R2-CCR’} (2a,b: R’ = TMS; 3a,b: R’ = H) and their sym. substituted bimetallic congeners, complexes {Cl(dppe)2Ru}2{μ-CC-1,4-C6H2-2,5-R2-CC} (Aa, R = H; Ab, R = OMe) and {RuCl(CO)(PiPr3)2}2{μ-CH:CH-1,4-C6H2-2,5-R2-CH:CH} (Va, R = H; Vb, R = OMe) as well as the mixed (ethynyl)(vinyl)phenylene bridged [Cl(dppe)2Ru-CC-1,4-C6H4-CH:CH-RuCl(CO)(PiPr3)2] (Ma). Successive 1-electron transfer steps were studied by cyclic voltammetry, EPR and UV-visible-NIR-IR spectroelectrochem. The 1st oxidation mainly involves the central bis(alkynyl) Ru moiety with only limited effects on the appended vinyl Ru moieties. The 2nd to 4th oxidations (n = 2, 3, 4) involve the entire C-rich conjugated path of the mol. with an increased charge uniformly distributed between the two arms of the mols., including the terminal vinyl Ru sites. To assess the charge distribution, the authors judiciously use 13CO labeled analogs to distinguish stretching vibrations due to the acetylide triple bonds and the intense and charge-sensitive Ru(CO) IR probe in different oxidation states. The comparison between complex pairs 4a,bn+ (n = 0-3), Aa,bn+ and Va,bn+ (n = 0-2) serves to elucidate the effect of the methoxy donor substituents on the redox and spectroscopic properties of these systems in their various oxidation states and on the metal/ligand contributions to their frontier orbitals. In the experimental materials used by the author, we found 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Application In Synthesis of 1,4-Diethynyl-2,5-dimethoxybenzene)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.Although ethers resist hydrolysis, they are cleaved by hydrobromic acid and hydroiodic acid. Hydrogen chloride cleaves ethers only slowly. Application In Synthesis of 1,4-Diethynyl-2,5-dimethoxybenzene

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Computed Properties of C12H10O2On November 5, 2021 ,《Effects of side alkoxy groups on the arylacetylene unit on properties of Poly(silylene arylacetylene)s》 appeared in European Polymer Journal. The author of the article were Li, Jixian; Gong, Changjun; Lv, Shuaikang; Huang, Farong. The article conveys some information:

A series of poly(dimethylsilylene arylacetylene)s with different side alkoxy groups on the arylacetylene unit (named as PSA-(AO) resins), including methoxy (MO), ethoxy (EO), pentyloxy (PO), and decyloxy (DO), were synthesized from corresponding disubstituted diethynylbenzene and dichlorodimethylsilane. The processability, heat resistance and mech. properties, and the effects of side alkoxy groups were investigated. The results show the processability of PSA-(AO) resins is improved, while the flexural properties and heat resistance of the relative cured resins decrease with the increase in the length of side alkoxy groups. The flexural strength and degradation temperature of 5% weight loss for the cured PSA-(EO) resin with side ethoxy groups reach 20.8 MPa and 415°, resp. In the experiment, the researchers used 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Computed Properties of C12H10O2)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.Although ethers resist hydrolysis, they are cleaved by hydrobromic acid and hydroiodic acid. Hydrogen chloride cleaves ethers only slowly. Computed Properties of C12H10O2

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Category: ethers-buliding-blocksOn March 31, 2020, Albano, Gianluigi; Colli, Tony; Nucci, Luigi; Charaf, Rima; Biver, Tarita; Pucci, Andrea; Aronica, Laura Antonella published an article in Dyes and Pigments. The article was 《Synthesis of new bis[1-(thiophenyl)propynones] as potential organic dyes for colorless luminescent solar concentrators (LSCs)》. The article mentions the following:

New luminophores having different aryl nuclei and propynones moieties have been obtained via Sonogashira reactions. Their optical properties were evaluated and indicated that carbonyl groups are responsible for significant bathochromic effects and high Stokes shifts. The insertion of -OMe groups on the central benzene unit gives to the fluorophore high optical efficiency (7.7%) when homogeneously dispersed in a poly(cyclohexyl methacrylate) (PCMA) film and connected to a PV cell. In the experiment, the researchers used many compounds, for example, 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Category: ethers-buliding-blocks)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.Ethers do have nonbonding electron pairs on their oxygen atoms, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds. Category: ethers-buliding-blocks The ability to form hydrogen bonds with other compounds makes ethers particularly good solvents for a wide variety of organic compounds and a surprisingly large number of inorganic compounds.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

《Synthesis and optical properties of a novel sugar coated poly(p-phenyleneethynylene) effectively quenched by concanavalin A》 was written by Tsakama, Madalitso; Shang, Yuting; He, Yonghuang; Fan, Bei; Wang, Fengzhong; Chen, Weihua; Dai, Xiaofeng. Name: 1,4-Diethynyl-2,5-dimethoxybenzene And the article was included in Tetrahedron Letters on April 20 ,2016. The article conveys some information:

The synthesis of a novel sugar coated poly(p-phenyleneethynylene) (PPE) via Pd-catalyzed Sonogashira reaction and its subsequent interaction with Con A are described. UV-visible and fluorescence spectra were employed to study the response of the polymer toward various concentrations of Con A. The polymer showed a green fluorescence which can be quenched by Con A due to complex formation at ground state. The protocols reported herein provide intermediate products that can be converted into useful sensing elements from cheap and com. available starting materials, in a few number of steps. In the part of experimental materials, we found many familiar compounds, such as 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Name: 1,4-Diethynyl-2,5-dimethoxybenzene)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.Although ethers resist hydrolysis, they are cleaved by hydrobromic acid and hydroiodic acid. Hydrogen chloride cleaves ethers only slowly. Name: 1,4-Diethynyl-2,5-dimethoxybenzene

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem