Tag: 100-200

Phase Equilibria and Diffusivities of HFC-32 and HFC-125 in Ionic Liquids for the Separation of R-410A was written by Baca, Kalin R.;Olsen, Greta M.;Matamoros Valenciano, Lucia;Bennett, Madelyn G.;Haggard, Dorothy M.;Befort, Bridgette J.;Garciadiego, Alejandro;Dowling, Alexander W.;Maginn, Edward J.;Shiflett, Mark B.. And the article was included in ACS Sustainable Chemistry & Engineering in 2022.Quality Control of 1-Methyl-3-propylimidazolium Chloride This article mentions the following:

Current legislation calling for the phase out of hydrofluorocarbon (HFC) refrigerants is driving a global market shift that has prompted industry and research institutions to investigate new refrigerant mixtures and sustainable separation techniques for recycling refrigerants. The recent American Innovation and Manufacturing (AIM) Act of 2020 requires an 85% phase down of HFC production over the next 15 years. To achieve this goal, azeotropic refrigerant mixtures, such as R-410A composed of 50 wt % HFC-32 (difluoromethane, CH₂F₂) and 50 wt % HFC-125 (pentafluoroethane, CHF₂CF₃), will have to be separated to recycle the lower global warming HFC-32 component. The present work investigates the solubility of HFC-32 and HFC-125 in six ionic liquids (ILs) with halogen anions for the purpose of developing the thermophys. property data required for designing extractive distillation recycling processes and understanding the choice of cation and anion type. A gravimetric microbalance was used to collect isothermal vapor-liquid equilibrium data for each of the ILs at 298.15 K and pressures from 0.05 to 1.0 MPa. The Peng-Robinson equation of state was used to model the solubility of the HFCs in the ILs. The solubility of HFC-32 in the ILs showed small differences, while the solubility of HFC-125 had significant variations with respect to the anion type and the cation alkyl chain length. Fick’s law was applied to calculate diffusion coefficients for each HFC/IL system. HFC-32 has a greater diffusivity than HFC-125 based on the smaller mol. size. The 1-n-hexyl-3-methylimidazolium chloride and the trihexyl(tetradecyl)phosphonium chloride ILs have the highest HFC-125/HFC-32 selectivity at 298.15 K. Based on both the mass uptake and selectivity ratio, these two ILs are potential entrainers for the separation of R-410A using extractive distillation In the experiment, the researchers used many compounds, for example, 1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8Quality Control of 1-Methyl-3-propylimidazolium Chloride).

1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8) belongs to imidazole derivatives. 1H-imidazole is an imidazole tautomer which has the migrating hydrogen at position 1. It is a conjugate base of an imidazolium cation. It is a conjugate acid of an imidazolide. It is a tautomer of a 4H-imidazole. Imidazole based anticancer drug find applications in cancer chemotherapy. It is used as buffer component for purification of the histidine tagged recombinant proteins in immobilized metal-affinity chromatography (IMAC).Quality Control of 1-Methyl-3-propylimidazolium Chloride

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Separation of nitroimidazoles by reversed-phase high-pressure liquid chromatography was written by Sithole, Bishop B.;Guy, Robert D.. And the article was included in Talanta in 1986.Quality Control of 1-Methyl-4-nitroimidazole This article mentions the following:

A mixture of 8 N-substituted and unsubstituted nitroimidazoles was separated by high-pressure liquid chromatog. with 5% EtOH as the eluent. Compounds with the same capacity ratios were selectively detected electrochem. by differential pulse polarog. with a hanging Hg drop electrode (HMDE). The HMDE detector had higher detection limits than the photometric detector set at 315 nm. In the experiment, the researchers used many compounds, for example, 1-Methyl-4-nitroimidazole (cas: 3034-41-1Quality Control of 1-Methyl-4-nitroimidazole).

1-Methyl-4-nitroimidazole (cas: 3034-41-1) belongs to imidazole derivatives. The solubility of imidazoles in ethers is lower than that in alcohols and decreases with increasing chain length of the ethers . In contrast, the solubility of benzimidazoles in alcohols (C3–C6) is higher than in water and generally decreases with a The pharmacophore of imidazole exists in bioactive compounds including amino acids, plant growth regulators and therapeutic agents.n increase of the alkyl chain length of the alcohols. Quality Control of 1-Methyl-4-nitroimidazole

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Synthesis and pharmacological activity N-aryloxyethyl derivatives of 9H-2,3-dihydroimidazo- and 10H-2,3,4,10-tetrahydropyrimido[1,2-a]benzimidazoles was written by Anisimova, V. A.;Spasov, A. A.;Stepanov, A. V.;Ar’kova, N. V.;Jakovlev, D. S.. And the article was included in Pharmaceutical Chemistry Journal in 2006.HPLC of Formula: 24134-26-7 This article mentions the following:

A series of N-aryloxyethyl derivatives of 9H-2,3-dihydroimidazo- and 10H-2,3,4,10-tetrahydropyrimido-[1,2-a]benzimidazoles, e.g. I·HCl, have been synthesized and tested for pharmacol. properties. It is established that most of the synthesized substances exhibit antiarrhythmic, antiaggregant and hemorheol. activity. In the experiment, the researchers used many compounds, for example, 2,3-Dihydro-1H-benzo[d]imidazo[1,2-a]imidazole (cas: 24134-26-7HPLC of Formula: 24134-26-7).

2,3-Dihydro-1H-benzo[d]imidazo[1,2-a]imidazole (cas: 24134-26-7) belongs to imidazole derivatives. Many natural products, especially alkaloids, contain the imidazole ring. These imidazoles share the 1,3-C3N2 ring but feature varied substituents. Imidazole also acts as a microtubule destabilizing agents and inhibits topoisomerase and Cytochrome P450 Family 26 Subfamily A Member 1 (CYP26A1) enzymes.HPLC of Formula: 24134-26-7

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Toughening Poly(lactic acid) with Imidazolium-based Elastomeric Ionomers was written by Chen, Lu;Hu, Kuan;Sun, Si-Ting;Jiang, Hai;Huang, Dong;Zhang, Kun-Yu;Pan, Li;Li, Yue-Sheng. And the article was included in Chinese Journal of Polymer Science in 2018.Related Products of 21252-69-7 This article mentions the following:

Imidazolium-based elastomeric ionomers (i-BIIR) were facilely synthesized by ionically modified brominated poly(isobutylene-co-isoprene) (BIIR) with different alkyl chain imidazole and thoroughly explored as novel toughening agents for poly(lactic acid) (PLA). The miscibility, thermal behavior, phase morphol. and mech. property of ionomers and blends were investigated through dynamic mech. analyses (DMA), differential scanning calorimetry (DSC), SEM, tensile and impact testing. DMA and SEM results showed that better compatibility between the PLA and i-BIIR was achieved compared to the PLA/unmodified BIIR elastomer. A remarkable improvement in ductility with an optimum elongation at break up to 235% was achieved for the PLA/i-BIIR blends with 1-dodecylimidazole alkyl chain (i-BIIR-12), more than 10 times higher than that of pure PLA. The impact strengths of PLA were enhanced from 1.9 kJ/m² to 4.1 kJ/m² for the PLA/10 wt% i-BIIR-12 blend. Toughening mechanism had been established by systematical anal. of the compatibility, intermol. interaction and phase structures of the blends. Interfacial cavitations initiated massive shear yielding of the PLA matrix owing to a suitable interfacial adhesion which played a key role in the enormous toughening effect in these blends. We believed that introducing imidazolium group into the BIIR elastomer was vital for the formation of a suitable interfacial adhesion. In the experiment, the researchers used many compounds, for example, 1-Octyl-1H-imidazole (cas: 21252-69-7Related Products of 21252-69-7).

1-Octyl-1H-imidazole (cas: 21252-69-7) belongs to imidazole derivatives. Imidazole is the basic core of some natural products such as histidine, purine, histamine and DNA based structures, etc. Among the different heterocyclic compounds, imidazole is better known due to its broad range of chemical and biological properties. Imidazole derivatives have antibacterial, antifungal and anticancer functionality. It interacts with DNA and also binds to protein and stops cell division.Related Products of 21252-69-7

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Synthesis and pharmacological activity of aroylmethyl derivatives of tricyclic benzimidazole systems containing hydroxy groups in aroyl radicals was written by Anisimova, V. A.;Tolpygin, I. E.;Spasov, A. A.;Kosolapov, V. A.;Stepanov, A. V.;Orlova, A. A.;Naumenko, L. V.. And the article was included in Pharmaceutical Chemistry Journal in 2007.Application of 24134-26-7 This article mentions the following:

The synthesis and pharmacol. properties of a series of hydroxybenzoylmethylimidazo- and pyrimidobenzimidazoles are described. Most of the products exhibit a high antioxidant activity, possess pronounced hemorheol. properties, and influence the blood glucose level. In the experiment, the researchers used many compounds, for example, 2,3-Dihydro-1H-benzo[d]imidazo[1,2-a]imidazole (cas: 24134-26-7Application of 24134-26-7).

2,3-Dihydro-1H-benzo[d]imidazo[1,2-a]imidazole (cas: 24134-26-7) belongs to imidazole derivatives. Imidazole is a heterocyclic compound with a five-membered planar ring. It is amphoteric and highly polar. Imidazole based anticancer drug find applications in cancer chemotherapy. It is used as buffer component for purification of the histidine tagged recombinant proteins in immobilized metal-affinity chromatography (IMAC).Application of 24134-26-7

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Unraveling the antitrypanosomal mechanism of benznidazole and related 2-nitroimidazoles: From prodrug activation to DNA damage was written by Dattani, Ambika;Drammeh, Isatou;Mahmood, Aishah;Rahman, Mahbubur;Szular, Joanna;Wilkinson, Shane R.. And the article was included in Molecular Microbiology in 2021.Application In Synthesis of 2-(2-Nitro-1H-imidazol-1-yl)acetic acid This article mentions the following:

Nitroheterocycles represent an important class of compound used to treat trypanosomiasis. They often function as prodrugs and can undergo type I nitroreductase (NTR1)-mediated activation before promoting their antiparasitic activities although the nature of these downstream effects has yet to be determined Here, we show that in an NTR1-dependent process, benznidazole promotes DNA damage in the nuclear genome of Trypanosoma brucei, providing the first direct link between activation of this prodrug and a downstream trypanocidal mechanism. Phenotypic and protein expression studies revealed that components of the trypanosome′s homologous recombination (HR) repair pathway (TbMRE11, γH2A, TbRAD51) cooperate to resolve the benznidazole-induced damage, indicating that the prodrug-induced lesions are most likely double stand DNA breaks, while the sequence/recruitment kinetics of these factors parallels that in other eukaryotes HR systems. When extended to other NTR1-activated 2-nitroimidazoles, some were shown to promote DNA damage. Intriguingly, the lesions induced by these required TbMRE11 and TbCSB activities to fix leading us to postulate that TbCSB may operate in systems other than the transcription-coupled nucleotide excision repair pathway. Understanding how existing trypanosomal drugs work will aid future drug design and help unlock novel reactions/pathways that could be exploited as targets for therapeutic intervention. In the experiment, the researchers used many compounds, for example, 2-(2-Nitro-1H-imidazol-1-yl)acetic acid (cas: 22813-32-7Application In Synthesis of 2-(2-Nitro-1H-imidazol-1-yl)acetic acid).

2-(2-Nitro-1H-imidazol-1-yl)acetic acid (cas: 22813-32-7) belongs to imidazole derivatives. Among the different heterocyclic compounds, imidazole is better known due to its broad range of chemical and biological properties. Imidazole has become an important synthon in the development of new drugs. Imidazole derivatives have antibacterial, antifungal and anticancer functionality. It interacts with DNA and also binds to protein and stops cell division.Application In Synthesis of 2-(2-Nitro-1H-imidazol-1-yl)acetic acid

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The effect of an electron-withdrawing group in the imidazolium cation: the case of nitro-functionalized imidazolium salts as acidic catalysts for the acetylation of glycerol was written by Morais, Eduardo M.;Grillo, Igor B.;Stassen, Hubert K.;Seferin, Marcus;Scholten, Jackson D.. And the article was included in New Journal of Chemistry in 2018.Quality Control of 1-Methyl-1H-imidazol-3-ium chloride This article mentions the following:

The acetylation of glycerol was achieved with high conversion and selectivity towards triacetin at low temperatures and short reaction times by using acidic imidazolium salts as catalysts. Moreover, the addition of a nitro group to the imidazolium cation affords a much more competent catalyst, indicating a significant effect provided by the simple electronic change in the imidazolium cation. Theor. calculations revealed increased polarization of the acidic hydrogen bond on the nitrated salts, which may be related to their superior catalytic behavior when compared to the non-functionalized salts. Combining the preliminary exptl. and theor. results, it is possible to suppose that the catalytic activity of acidic imidazolium salts may be better comprehended by its Bronsted acidities, but other parameters such as hardness, electronegativity, electrophilicity and ion-pair binding energy were also evaluated in order to investigate their effects in the acetylation of glycerol promoted by these acidic imidazolium salts. In the experiment, the researchers used many compounds, for example, 1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3Quality Control of 1-Methyl-1H-imidazol-3-ium chloride).

1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3) belongs to imidazole derivatives. Many natural products, especially alkaloids, contain the imidazole ring. These imidazoles share the 1,3-C3N2 ring but feature varied substituents. Imidazole derivatives have antibacterial, antifungal and anticancer functionality. It interacts with DNA and also binds to protein and stops cell division.Quality Control of 1-Methyl-1H-imidazol-3-ium chloride

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Reductive cyclization of o-phenylenediamine with CO₂ and BH₃NH₃ to synthesize 1H-benzoimidazole derivatives was written by Li, Xiao;Zhang, Junhua;Yang, Yue;Hong, Hailong;Han, Limin;Zhu, Ning. And the article was included in Journal of Organometallic Chemistry in 2021.COA of Formula: C8H8N2 This article mentions the following:

A simple and green protocol was developed for the reductive cyclization of o-phenylenediamine with CO₂ and BH₃NH₃ to yield 1H-benzimidazole. The desired 1H-benzimidazole derivatives were produced under mild conditions. Mechanism investigation indicated that the coordination of o-phenylenediamine with the boron atom of BH₃NH₃ promoted the transfer of the formyl group to form a stable intermediate, which facilitated the intramol. nucleophilic addition-elimination for the formation of target product. In this process, BH₃NH₃ served multifunctional roles, acting as a reducing agent and a formylation catalyst. In the experiment, the researchers used many compounds, for example, 7-Methyl-1H-benzo[d]imidazole (cas: 4887-83-6COA of Formula: C8H8N2).

7-Methyl-1H-benzo[d]imidazole (cas: 4887-83-6) belongs to imidazole derivatives. 1H-imidazole is an imidazole tautomer which has the migrating hydrogen at position 1. It is a conjugate base of an imidazolium cation. It is a conjugate acid of an imidazolide. It is a tautomer of a 4H-imidazole. Imidazole has been usedin the lysis, wash and elution buffer for the purification of histidine tagged Sonic Hedgehog(shh-N) protein, in elution buffer in stepwise gradient for the purification of histidine tagged aldo keto reductases using nickel affinity chromatography, as a component of homogenization buffer for the purification of phagosomal compartments from dendritic cells.COA of Formula: C8H8N2

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Effective Interface Defect Passivation via Employing 1-Methylbenzimidazole for Highly Efficient and Stable Perovskite Solar Cells was written by Zheng, Haiying;Liu, Guozhen;Wu, Weiwei;Xu, Huifen;Pan, Xu. And the article was included in ChemSusChem in 2021.Computed Properties of C8H8N2 This article mentions the following:

Although the power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) have made great progress, the surface and interface defects still affect their PCE and stability and hinder the commercialization. To overcome this problem, 1-methylimidazole (1-MIm) and 1-methylbenzimidazole (1-MBIm) were used as the interfacial passivation agents to passivate the defects at surface and interface. The results indicated that, in contrast to 1-MIm, 1-MBIm displayed a stronger Lewis coordination interaction with the uncoordinated Pb²⁺ to reduce the non-radiative recombination and also effectively improved the charge transfer capacity of perovskite films due to its strong Π-Π conjugate interaction, resulting in the better photovoltaic performance. As a result, the PCE of the champion 1-MBIm PSC was improved from 19.48 (pristine) to 21.22 % with a dramatically enhanced open-circuit voltage (V_oc=1.15 V). More importantly, a significant improvement in long-term stability was achieved for 1-MBIm perovskite devices, which was attributed to the high-quality perovskite film caused by the strong passivation effect of 1-MBIm and the hydrogen bond with water mols. The results offers an efficient and facile strategy by interface engineering to fabricate high-performance and stable PSCs for com. application. In the experiment, the researchers used many compounds, for example, 1-Methylbenzimidazole (cas: 1632-83-3Computed Properties of C8H8N2).

1-Methylbenzimidazole (cas: 1632-83-3) belongs to imidazole derivatives. Imidazole is the basic core of some natural products such as histidine, purine, histamine and DNA based structures, etc. Among the different heterocyclic compounds, imidazole is better known due to its broad range of chemical and biological properties. Imidazole has been usedin the lysis, wash and elution buffer for the purification of histidine tagged Sonic Hedgehog(shh-N) protein, in elution buffer in stepwise gradient for the purification of histidine tagged aldo keto reductases using nickel affinity chromatography, as a component of homogenization buffer for the purification of phagosomal compartments from dendritic cells.Computed Properties of C8H8N2

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Experimental study on the pyrolysis of sewage sludge was written by Shen, Boxiong;Zhang, Zenghui;Chen, Jianhong;Hao, Xiaocui;Wen, Jie. And the article was included in Anquan Yu Huanjing Xuebao in 2011.Recommanded Product: 3034-41-1 This article mentions the following:

In this paper, the effect of final pyrolysis temperature on the yield of products from the pyrolysis of sewage sludge was studied. The light fraction from sludge pyrolysis oil was analyzed. The fundamental properties of the pyrolysis residues were also investigated briefly. The results showed that when the final pyrolysis temperature was between 450 °C to 500°C, the yield of liquid product was favorable. With the increase of final pyrolysis temperature, the decreasing trend of pyrolysis residue was similar to the increasing trend of liquid product. Both of them were steep when the temperature was under 450°C and mild when the temperature was higher than 450°C. Meanwhile the uncondensed gas increased smoothly with the increase of final pyrolysis temperature The light fractions of pyrolysis oil obtained at 450°C was mainly consisted of alkanes, alkenes, nitriles and nitrogen-containing heterocyclic compounds as well as MAHs etc. Among them, the concentration of toluene, 4-methyl-phenol, 1-methyl-2, 5-pyrrolidinedione, pyridine, 1-dodecene and pentadecane etc. were significant. The pyrolysis residues of sewage sludge contained low carbon and high ash. However, they still possessed some volatile content. With the increase of final pyrolysis temperature, the surface of pyrolysis residue became more and more looser and rougher. The residue obtained at 450°C exhibited highest pore volume Nevertheless, the residue obtained at 500°C owned maximum sp. surface area in respect that it possessed highest number of micropores. In the experiment, the researchers used many compounds, for example, 1-Methyl-4-nitroimidazole (cas: 3034-41-1Recommanded Product: 3034-41-1).

1-Methyl-4-nitroimidazole (cas: 3034-41-1) belongs to imidazole derivatives. Imidazole is a heterocyclic compound with a five-membered planar ring. It is amphoteric and highly polar. Imidazole derivatives have antibacterial, antifungal and anticancer functionality. It interacts with DNA and also binds to protein and stops cell division.Recommanded Product: 3034-41-1

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem