Category: 74029-40-6

HPLC of Formula: 74029-40-6On October 12, 2016 ,《Tuning the backbones and side chains of cationic meta-linked poly(phenylene ethynylene)s: Different conformational modes, tunable light emission, and helical wrapping of multi-walled carbon nanotubes》 was published in Polymer. The article was written by Huang, Yan-Qin; Zhong, Yi-You; Zhang, Rui; Zhao, Yong-Kang; Liu, Xing-Fen; Zhang, Guang-Wei; Fan, Qu-Li; Wang, Lian-Hui; Huang, Wei. The article contains the following contents:

We have an ongoing interest in the design and control of helical conformation of water-soluble meta-linked poly(phenylene ethynylene)s (PPEs) and the further development of novel functional materials. Four cationic meta-linked PPEs (P1′-P4′) were synthesized to study the influence of differences in the backbone and side chain structure on their conformations. For P1′ and P4′ without side chains on the para-phenylene units, fluorescence spectroscopic investigations indicated obvious intramol. helical folding, whereas for P2′ and P3′ with nonpolar and polar side chains on the para-phenylene units resp., a significantly different conformational mode, namely, cofacial intermol. aggregation was suggested. The side chains on the para-phenylene units of P2′ and P3′ may be located in the interior cavity of helix and induce steric effect on the formation of helix. However, the introduction of 2,1,3-benzothiadiazole (BT), a low energy gap unit, into the backbone of P4′ showed little influence on the formation of helix despite its larger and more rigid structure than the phenylene unit. Thus, the light emission of these polymers can be tuned in the range from blue, green to yellow with the changes of conformational modes. Moreover, the functionalization of multi-walled carbon nanotubes (MWCNTs) by P4′ in methanol and water, and by using its neutral precursory polymer P4 in THF was explored through transmission electron microscopy and fluorescence spectroscopy. P4′ was directly observed to individualize MWCNT by forming a monolayer helical wrapping on the nanotube surface, which may be attributed to the backbone flexibility of meta-linked PPE and the strong π-π interactions between the PPE backbone and the CNT surface. Moreover, P4′ served as a better dispersing agent for MWCNT than P4, suggesting that the cationic side groups may act as solubilizing groups which also separated the individual nanotubes because of charge repulsion.1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6HPLC of Formula: 74029-40-6) was used in this study.

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. They are far less acidic than alpha hydrogens of carbonyl groups (such as in ketones or aldehydes), however. HPLC of Formula: 74029-40-6

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

The author of 《A novel fluorescence probe based on p-acid-Br and its application in thiourea detection》 were Wang, Xiu; Yang, Chunlei; Yan, Mei; Ge, Shenguang; Yu, Jinghua. And the article was published in RSC Advances in 2016. Reference of 1,4-Diethynyl-2,5-dimethoxybenzene The author mentioned the following in the article:

In this paper, a novel phenyleneethynylene derivative 4,4′-(2,5-dimethoxy-1,4-phenylene)bis(ethyne-2,1-diyl) dibenzoic acid (p-acid) and its derivative p-acid-Br were synthesized. IR spectroscopy (IR), fluorescence (FL) spectroscopy and UV visible (UV-vis) spectroscopy were applied to characterize p-acid and p-acid-Br. To research the practical applicability, a sample thiourea sensor was constructed using the p-acid-Br label, in which the FL intensity response was proportional to the thiourea concentration in the range of 0.5-1000 nM, with a detection limit of 0.26 nM. Furthermore, the sensor showed high specificity, excellent stability, and good reproducibility. The p-acid-Br-based thiourea sensor can also provide potential application for detection of other organics The method showed low detection limit, good specificity, high sensitivity and reproducibility. Satisfactory results were obtained for the determination of thiourea in various water samples and fruit juice samples. This work is to open new avenues in the application of the phenyleneethynylene derivative for a sensitive thiourea assay. Hence, the proposed fluorescence sensor could become a promising method for local market. In the experiment, the researchers used many compounds, for example, 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Reference of 1,4-Diethynyl-2,5-dimethoxybenzene)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.The C-O bonds that comprise simple ethers are strong. They are unreactive toward all but the strongest bases. Although generally of low chemical reactivity, they are more reactive than alkanes. Reference of 1,4-Diethynyl-2,5-dimethoxybenzene

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

Quality Control of 1,4-Diethynyl-2,5-dimethoxybenzeneOn June 11, 2001, Dirk, S. M.; Price, D. W.; Chanteau, S.; Kosynkin, D. V.; Tour, J. M. published an article in Tetrahedron. The article was 《Accoutrements of a molecular computer: switches, memory components and alligator clips》. The article mentions the following:

Several second generation memory components consisting of oligo(phenylene ethynylene)s containing easily reducible functionalities consisting of either nitro or quinone cores have been synthesized for incorporation into mol. electronic devices. Addnl., two new types of contacts between organic compounds and a metal surface based on diazonium salts or pyridine have been synthesized and integrated into mols. for use in mol. electronic devices. In the experiment, the researchers used 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Quality Control of 1,4-Diethynyl-2,5-dimethoxybenzene)

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. They are far less acidic than alpha hydrogens of carbonyl groups (such as in ketones or aldehydes), however. Quality Control of 1,4-Diethynyl-2,5-dimethoxybenzene

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

Pelter, Andrew; Jones, D. Elfyn published an article in Perkin 1. The title of the article was 《The preparation and some properties of substituted phenylene-ethynylene and phenylenebuta-1,3-diynylene polymers》.Related Products of 74029-40-6 The author mentioned the following in the article:

Syntheses are described for the preparation of a variety of diynes which are converted to high mol. weight substituted arylenebuta-1,3-diynylene polymers by oxidative coupling and to high mol. weight substituted arylene-ethynylene polymers by Pd(II) catalyzed cross coupling reactions. The products tend to be insoluble in normal organic solvents. Doping with ferric chloride produces significant changes in conductivity but these are less than those produced on equivalently substituted thienylene-phenylene polymers.1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Related Products of 74029-40-6) was used in this study.

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. Related Products of 74029-40-6

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

《Polytriazole bridged with 2,5-diphenyl-1,3,4-oxadiazole moieties: a highly sensitive and selective fluorescence chemosensor for Ag+》 was published in RSC Advances in 2015. These research results belong to Cao, Shoupeng; Pei, Zhichao; Xu, Yongqian; Zhang, Ruina; Pei, Yuxin. Quality Control of 1,4-Diethynyl-2,5-dimethoxybenzene The article mentions the following:

Fluorescent conjugated polytriazoles (FCP 1-4) containing both 2,5-diphenyl-1,3,5-oxadiazole (OXD) and 1,2,3-triazole moieties in the main chain were synthesized from aromatic diazide (1) and dialkynes (2-5) via click polymerization, resp. In the polymers, OXDs (fluorophores) and triazole rings (generated via CuAAC acting as metal ion ligands) comprise a fluorescent system. The polytriazoles displayed relatively strong emission with quantum yields in the range of 0.20-0.28 at room temperature in DMF. The study on their ion-responsive properties showed that, although all four FCPs have good selectivity for Ag+, the integration of alkoxy side groups (methoxy for FCP 2, hexyloxy for FCP 3 and 2-ethylhexyloxy for FCP 4) to the main chains of the polytriazoles decreased their sensitivity for Ag+via alteration of the polymer aggregation status and electron d. of the main chains. Thus FCP 1 is highly sensitive for Ag+, where its Ksv is as high as 1.44 × 105 M-1 and its lowest detection limit is in the ppb range (4.22 × 10-7 M). This study provides an efficient click approach to the synthesis of a novel fluorescence sensor for Ag+ detection, which could expand the application of click polymerization in designing fluorescence sensors based on the triazole unit. In addition to this study using 1,4-Diethynyl-2,5-dimethoxybenzene, there are many other studies that have used 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Quality Control of 1,4-Diethynyl-2,5-dimethoxybenzene) was used in this study.

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.The C-O bonds that comprise simple ethers are strong. Quality Control of 1,4-Diethynyl-2,5-dimethoxybenzene They are unreactive toward all but the strongest bases. Although generally of low chemical reactivity, they are more reactive than alkanes.

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

《Cu-Catalyzed four-component polymerization of alkynes, sulfonyl azides, nucleophiles and electrophiles》 was published in Polymer Chemistry in 2021. These research results belong to He, Junnan; Zheng, Nan; Li, Ming; Zheng, YuBin; Song, Wangze. Safety of 1,4-Diethynyl-2,5-dimethoxybenzene The article mentions the following:

Multicomponent polymerization has emerged as a promising strategy to develop functional polymers with versatile structures. In this work, a Cu-catalyzed four-component polymerization was developed using diynes, sulfonyl azides, nucleophiles, and a variety of electrophiles including alkyl glyoxylates, nitroalkenes, and Morita-Baylis-Hillman adducts to successfully synthesize a library of α-functionalized poly(N-sulfonylimidates)s with a wide substrate scope and high mol. weights (up to 20 000 g mol-1) in high yields (up to 86%). Such α-functionalized poly(N-sulfonylimidates)s could be further post-modified or utilized for the design of multi-functional and biodegradable polymers. In the experiment, the researchers used 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.The C-O bonds that comprise simple ethers are strong. Safety of 1,4-Diethynyl-2,5-dimethoxybenzene They are unreactive toward all but the strongest bases. Although generally of low chemical reactivity, they are more reactive than alkanes.

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

In 2018,Molecules included an article by Tsakama, Madalitso; Ma, Xiaochi; He, Yonghuan; Chen, Weihua; Dai, Xiaofeng. Formula: C12H10O2. The article was titled 《A simple mannose-coated poly (p-phenylene ethynylene) for qualitative bacterial capturing》. The information in the text is summarized as follows:

A mannose-functionalized poly (p-phenylene ethynylene) was rationally designed to achieve selective detection of bacteria. The polymer was constructed as a signaling unit and was modified by attaching aminoethyl mannose using the carboxylic acid group at the end of the linker. Incubation of Escherichia coli with the polymer yielded fluorescent bacteria aggregates through polyvalent interactions. The utility of the mannose functionalized polymer to detect E. coli expressing functional FimH mannose-specific lectin on their surface was also demonstrated. The sugar units displayed on the surface of the polymer retained their functional ability to interact with mannose-binding lectin. To determine the optimum binding time, we measured the fluorescence intensity of the polymer-bacteria suspension at intervals. Our results showed that binding in this system will reach an optimum level within 30 min of incubation. The polymers affinity for bacteria has been demonstrated and bacteria with a concentration of 103 CFU mL-1 can be detected by this system. After reading the article, we found that the author used 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Formula: C12H10O2)

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. Formula: C12H10O2 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

《Synthesis, Characterization, and Substituent Effects of Binuclear Ruthenium Vinyl Complexes [RuCl(CO)(PMe3)3]2(μ-CH:CH-Ar-CH:CH)》 was written by Wu, Xiang Hua; Jin, Shan; Liang, Jin Hua; Li, Zi Yong; Yu, Guang-ao; Liu, Sheng Hua. Application In Synthesis of 1,4-Diethynyl-2,5-dimethoxybenzene And the article was included in Organometallics on April 27 ,2009. The article conveys some information:

Reactions of 1,4-diethenylbenzene derivatives with Ru(H)(Cl)(CO)(PPh3)2 followed by PMe3 to give binuclear Ru divinylbenzene complexes [RuCl(CO)(PMe3)3]2(μ-CH:CH-Ar-CH:CH) (Ar = C6H4 (6a), C6H3CH3 (6b), C6H3OCH3 (6c), C6H3F (6d), C6H3Cl (6e), C6H3Br (6f), C6H3CN (6g), C6H3NO2 (6h), C6H2Me2-2,5 (6i), C6H2(OCH3)2-2,5 (6j), C6H2(F)2-2,5 (6k), C6H2(CF3)2-2,5 (6l), and C6H3CF3 (6m)). The resp. products were characterized by elemental analyses, NMR spectrometry, and UV/visible spectrophotometry. The structures of 6h, 6i, and 6j were established by x-ray crystallog. Electrochem. studies revealed that intermetallic electron communication between the two Ru centers may be fine-tuned by modification of the bridging spacers, i.e., by introducing one or two substituent groups on the 1,4-diethenylphenylene bridge. Electron-releasing substituents facilitate electron communication between the two metal centers. In the experiment, the researchers used many compounds, for example, 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.The C-O bonds that comprise simple ethers are strong. They are unreactive toward all but the strongest bases. Although generally of low chemical reactivity, they are more reactive than alkanes. Application In Synthesis of 1,4-Diethynyl-2,5-dimethoxybenzene

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

Safety of 1,4-Diethynyl-2,5-dimethoxybenzeneOn March 8, 2010, Wu, Xiang-Hua; Liang, Jin Hua; Xia, Jian-Long; Jin, Shan; Yu, Guang-Ao; Liu, Sheng Hua published an article in Organometallics. The article was 《Bimetallic Ruthenium Complexes: Synthesis, Characterization, and the Effect of Appending Long Carbon Chains to Their Bridges》. The article mentions the following:

A series of binuclear ruthenium complexes [RuCl(CO)(PMe3)3]2(μ-CH=CH-Ar-CH=CH) (Ar = C6H2(OR)2-2,5; R = CH3 (4a), nC4H9 (4b), nC6H13 (4c), nC8H17 (4d), nC10H21 (4e), nC12H25 (4f), nC14H29 (4g)), [RuCl(CO)(PMe3)3]2(μ-CH=CH-Ar--Ar-CH=CH) (Ar = C6H2(R)2-2,5; R = OCH3 (10a), OnC8H17 (10b), H (10c)), and [RuCl(CO)(PMe3)3]2(μ-CH=CH-Ar--Ar--Ar-CH=CH) (Ar = C6H2(R)2-2,5; R = OCH3 (13a), OnC8H17 (13b), H (13c)) have been synthesized. These complexes have been characterized by elemental anal., NMR, and UV/vis spectrophotometry. The structures of 4b and 4d have been determined by x-ray crystallog. Electrochem. studies have shown that long carbon chains attached to the bridges of the complexes facilitate the stability of mixed-valence bimetallic ruthenium complexes.1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Safety of 1,4-Diethynyl-2,5-dimethoxybenzene) was used in this study.

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

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

The author of 《Bimetallic ruthenium complexes bridged by divinylphenylene bearing oligo(ethylene glycol)methylether: synthesis, (spectro)electrochemistry and the lithium cation effect》 were Tian, Li Yan; Liu, Yuan Mei; Tian, Guang-Xuan; Wu, Xiang Hua; Li, Zhen; Kou, Jun-Feng; Ou, Ya-Ping; Liu, Sheng Hua; Fu, Wen-Fu. And the article was published in Dalton Transactions in 2014. Category: ethers-buliding-blocks The author mentioned the following in the article:

1,4-Disubstituted Ru-vinyl complexes, (E,E)-[{(PMe3)3(CO)ClRu}2(μ-HC:CHArCH:CH)] (Ar = C6H2(OR)2, OR = (OCH2CH2)nOMe, n = 0-3), in which the 1,4-diethenylphenylene bridge bears two oligo(ethylene glycol)methyl ether side chains at different positions (2,5- and 2,3-positions), were prepared The resp. products were characterized by elemental analyses and NMR spectroscopy. The structures of complexes (E,E)-[{(PMe3)3(CO)ClRu}2(μ-HC:CHC6H2(OR)2CH:CH)] (1b, n = 1; 2,5-positions) and (E,E)-[{(PMe3)3(CO)ClRu}2(μ-HC:CHC6H2(OR)2CH:CH)] (1e, n = 0; 2,3-positions) were established by x-ray crystallog. The electronic properties of the complexes were studied by cyclic voltammetry, IR, and UV-visible/NIR spectroscopies. Electrochem. studies showed that the 2,5-substituents better stabilized the mixed-valence states; the electrochem. behavior was greatly affected by Li cations, especially for complex (E,E)-[{(PMe3)3(CO)ClRu}2(μ-HC:CHC6H2(OR)2CH:CH)] (1g, n = 2) with 2,3-substituents, which was further supported by IR and UV-visible/NIR spectra changes. Spectroelectrochem. studies showed that the redox chem. was dominated by the noninnocent character of the bridging fragment. In the experimental materials used by the author, we found 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.The C-O bonds that comprise simple ethers are strong. Category: ethers-buliding-blocks They are unreactive toward all but the strongest bases. Although generally of low chemical reactivity, they are more reactive than alkanes.

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