Month: April 2022

Hardt, Steffen; Stapf, Stefanie; Filmon, Dawit T.; Birrell, James A.; Ruediger, Olaf; Fourmond, Vincent; Leger, Christophe; Plumere, Nicolas published an article about the compound: 5,5′-Dimethyl-2,2′-bipyridine( cas:1762-34-1,SMILESS:CC1=CN=C(C=C1)C1=NC=C(C)C=C1 ).Category: benzodioxans. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:1762-34-1) through the article.

Efficient electrocatalytic energy conversion requires devices to function reversibly, i.e., to deliver a substantial current at a minimal overpotential. Redox-active films can effectively embed and stabilize mol. electrocatalysts, but mediated electron transfer through the film typically makes the catalytic response irreversible. Here we describe a redox-active film for bidirectional (oxidation or reduction) and reversible hydrogen conversion, which consists of [FeFe] hydrogenase embedded in a low-potential, 2,2′-viologen-modified hydrogel. When this catalytic film served as the anode material in a H2/O2 biofuel cell, an open circuit voltage of 1.16 V was obtained-a benchmark value near the thermodn. limit. The same film also acted as a highly energy efficient cathode material for H2 evolution. We explained the catalytic properties using a kinetic model, which shows that reversibility can be achieved even though intermol. electron transfer is slower than catalysis. This understanding of reversibility simplifies the design principles of highly efficient and stable bioelectrocatalytic films, advancing their implementation in energy conversion.

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Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Product Details of 1762-34-1. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 5,5′-Dimethyl-2,2′-bipyridine, is researched, Molecular C12H12N2, CAS is 1762-34-1, about Water-stable Zn-based metal-organic framework with hydrophilic-hydrophobic surface for selective adsorption and sensitive detection of oxo-anions and pesticides in aqueous medium. Author is Kaur, Harpreet; Walia, Sidharth; Karmakar, Anirban; Krishnan, Venkata; Koner, Rik Rani.

Given the importance of surface-functionalized materials with improved adsorption and detection properties for targeted applications, we report herein the design and development of a water-stable luminescent Zn-based metal-organic framework (Zn-MOF) with the hydrophobic-hydrophilic surface property. The developed luminescent Zn(II)-MOF {[Zn(PA2-)(dmbpy)](DMF)}n was synthesized via a solvothermal method using pamoic acid (PA) and 5,5′-dimethyl-2,2′-bipyridine (dmbpy) with free functional groups (hydroxyl and Me groups). Careful single-crystal structure anal. revealed a 3-dimensional hydrogen-bonded network with a one-dimensional channel and functionalized surface. The surface functionalization was achieved through rational choice of ligands bearing Me and hydroxyl groups as suitable hydrophobic and hydrophilic functionalities resp., leading to a stable MOF in the aqueous medium. The MOF was used as an adsorbent for selective adsorption of monovalent permanganate anion (MnO4-) over other polyvalent oxo-anions as well as an optical platform for the detection of oxo-anions (permanganate (MnO-4), dichromate (Cr2O72-) and chromate (CrO42-)) and pesticide (2,6-dichloro-4-nitroaniline (2,6-DCNA)) in the aqueous medium. Overall, a combination of luminescent nature and hydrophilic-hydrophobic surface property makes the developed Zn-MOF an interesting platform for environmental application.

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Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Product Details of 1762-34-1. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 5,5′-Dimethyl-2,2′-bipyridine, is researched, Molecular C12H12N2, CAS is 1762-34-1, about Crystal structure, thermochemical and fluorescent properties of two novel binuclear lanthanide complexes with 3-chloro-4-methoxybenzoic acid and 5,5′-dimethy-2,2′-bipyridine. Author is Wu, Xiao-Hui; Ning, Ren; Zhang, Jian-Jun.

Two novel binuclear lanthanide complexes, [Ln(3-Cl-4-MOBA)3(5,5′-DM-2,2′-bipy)]2(5,5′-DM-2,2′-bipy) (Ln=Eu(1), Gd(2)), (3-Cl-4-MOBA=3-chloro-4-methoxybenzoate; 5,5′-DM-2,2′-bipy=5,5′-dimethy-2,2′-bipyridine) have been successfully synthesized under hydrothermal conditions. The complexes are characterized by single-crystal X-ray diffraction and elemental anal. Complexes 1 and 2 are isomorphous, and each metal center is eight-coordinated with a distorted square-antiprism coordination geometry. The binuclear units are assembled into 1D, 2D and 3D supramol. structures by weak hydrogen bonds (C-H···O and C-H···Cl) and π-π stacking interactions. Thermal behavior of the complexes 1 and 2 was determined by TG/DSC-FTIR techniques. Heat capacities of the complexes are measured by a DSC instrument in the temperature range of 283.15-393.15K. Based on the heat capacities date, the thermodn. functions (HT-H298.15K) and (ST-S298.15K) were obtained. The activation energy E values of the first decomposition stage for complexes 1 and 2 were calculated by integral iso-conversional nonlinear (NL-INT) method. The fluorescence spectra and lifetime of complex 1 (Eu3+ ion) were studied in depth.

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Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 5,5′-Dimethyl-2,2′-bipyridine, is researched, Molecular C12H12N2, CAS is 1762-34-1, about [Ni(5,5′-dmbpy)3]2Ag4.9I8.9·4H2O: A discrete iodoargentate with transition metal complexes, the main research direction is nickel bipyridine iodoargentate complex preparation photocurrent photoelec; crystal structure nickel bipyridine iodoargentate complex.Computed Properties of C12H12N2.

Using the transition metal complex as templating agent, a new discrete iodoargentate compound, [Ni(5,5′-dmbpy)3]2Ag4.9I8.9·4H2O (5,5′-dmbpy = 5,5′-dimethyl-2,2′-bipyridine) (1) was solvothermally prepared and structurally characterized. Compound 1 has a discrete anionic moiety of [Ag4.9I8.9]4- constructed by three types of fundamental building units, i.e., [AgI2] dumbbell, [AgI3] triangle and [AgI4] tetrahedron. It possesses a band gap of 2.07 eV, and exhibits fascinating photoelec. property with the photocurrent value of around 0.5μA/cm2. Its thermal stability and Hirshfeld surface analyses were also investigated.

This literature about this compound(1762-34-1)Computed Properties of C12H12N2has given us a lot of inspiration, and I hope that the research on this compound(5,5′-Dimethyl-2,2′-bipyridine) can be further advanced. Maybe we can get more compounds in a similar way.

Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Product Details of 1762-34-1. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 5,5′-Dimethyl-2,2′-bipyridine, is researched, Molecular C12H12N2, CAS is 1762-34-1, about Syntheses, molecular structures, and spectroscopic properties of manganese(II)/(III) complexes with tetraphenylimidodiphosphinato and bi-pyridine or salicylaldehyde ligands. Author is Qian, Zhe; Zhang, Ying; Jia, Ai-Quan; Shi, Hua-Tian; Zhang, Qian-Feng.

Treatment of [Mn(CH3COO)2·4H2O] with two equivalent of K[N(Ph2PO)2] in the presence of one equivalent of 2,2′-bipyridine (bpy) or 5,5′-dimethyl-2,2′-bipyridine(dmbpy) in ethanol gave the mono-nuclear manganese(II) complexes [Mn{η1-O-N(Ph2PO)2}{N(Ph2PO)2}(EtOH)(bpy)] (1) and [Mn{N(Ph2PO)2}2(dmbpy)] (2), resp. Interaction of [Mn(CH3COO)2·4H2O], K[N(Ph2PO)2] and salicylaldehyde or 5-chlorosalicylaldehyde or 3,5-dibromosalicylaldehyde in the presence of triethylamine in methanol gave the bi-nuclear manganese(II) complexes [Mn2{N(Ph2PO)2}2(μ,η2-O,O’-Sal)2(MeOH)2] (3) and [Mn2{N(Ph2PO)2}2(μ,η2-O,O’-5-Cl-Sal)2(MeOH)2] (4), and a tetra-nuclear manganese(II)/(III) complex [Mn4{N(Ph2PO)2}2(μ,η2-O,O’-3,5-Br2-Sal’)2(MeOH)4(μ-OMe)2(μ3-OMe)2] (5), resp. All complexes were characterized by IR and UV spectroscopy, their mol. structures were unambiguously established by single crystal x-ray diffraction. The electrochem. properties of complexes 1-5 were also studied.

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Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Safety of 5,5′-Dimethyl-2,2′-bipyridine. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 5,5′-Dimethyl-2,2′-bipyridine, is researched, Molecular C12H12N2, CAS is 1762-34-1, about Theoretical and experimental study of torsional potentials, molecular structure (monomer and dimer), vibrational analysis and molecular characteristics of some dimethyl bipyridines. Author is Ravindranath, L.; Reddy, B. Venkatram.

This study deals with the determination of torsional potentials, mol. geometry in monomer and dimer form and vibrational assignments of 4,4′-dimethyl-2,2′-bipyridine (4DB); 5,5′-dimethyl-2,2′-bipyridine (5DB); and 6,6′-dimethyl-2,2′-bipyridine (6DB) using quantum chem. calculations carried out by d. functional theory (DFT) employing B3LYP functional in conjunction with 6-311++G(d,p) basis set. Existence of inter-mol. hydrogen bonds was predicted. Fourier Transform IR (FTIR) and Fourier Transform Raman (FT-Raman) spectra were recorded and vibrational anal. of the mols. was made using potential energy distribution (PED) and eigen vectors obtained in the computations. Observed and calculated frequencies agreed with an rms error 9.20, 8.21, and 8.33 cm-1 for 4DB, 5DB, and 6DB, resp. 1H and 13C NMR spectra were simulated using time-dependent DFT ; compared with the recorded exptl. spectra of the samples in Chloroform-d (CDCl3) solvent and observed that the chem. shifts agree well with their theor. counterparts. Electronic transitions were analyzed using exptl. and simulated UV-Vis spectra of the three mols. Mol. characteristics like HOMO-LUMO; thermodn. parameters; and mol. electrostatic surface potential (MESP) quantified with natural charges obtained by NBO anal. are also investigated.

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Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Recommanded Product: 5,5′-Dimethyl-2,2′-bipyridine. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 5,5′-Dimethyl-2,2′-bipyridine, is researched, Molecular C12H12N2, CAS is 1762-34-1, about Mechanism of Formic Acid Disproportionation Catalyzed by an Iridium Complex Immobilized on Bipyridine-Periodic Mesoporous Organosilica: A Case Study based on Kinetics Analysis.

This work investigated the kinetics of formic acid (FA) disproportionation using an Ir complex immobilized on bipyridine-periodic mesoporous organosilica (BPy-PMO). The selectivity for methanol (MeOH) is increased using this catalyst compared to conventional homogeneous Ir complexes. This enhanced selectivity is attributed to the retention of H2 and CO2 generated by the competing FA dehydrogenation in PMO mesochannels having a high aspect ratio. However, no direct evidence for this process was previously obtained. The present work clarified the unique catalysis mechanism associated with a PMO catalyst exhibiting higher MeOH selectivity based on a hypothesis that the generation of MeOH via FA hydrogenation is promoted by the confinement of H2 in the PMO pores. The results obtained from the present kinetics study and data regarding H2 diffusion in the PMO pores strongly support this hypothesis.

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Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 5,5′-Dimethyl-2,2′-bipyridine( cas:1762-34-1 ) is researched.Recommanded Product: 5,5′-Dimethyl-2,2′-bipyridine.Li, Rong-Yun; Liu, Hou-Ting; Chu, Zhi-Tong; Zhou, Chuan-Cong; Lu, Jing; Wang, Su-Na published the article 《Two nonporous MOFs with uncoordinated carboxylate groups: Fillers for enhancing the proton conductivities of nafion membrane》 about this compound( cas:1762-34-1 ) in Journal of Solid State Chemistry. Keywords: nickel cadmium bipyridine isophthalate MOF preparation crystal structure; thermal stability nickel cadmium bipyridine isophthalate MOF; proton conductivity nickel cadmium bipyridine isophthalate MOF composite membrane. Let’s learn more about this compound (cas:1762-34-1).

Two nonporous MOFs [Ni(L)0.5 (Mbpy)(H2O)2]2 (1) and [Cd(H2L)(Mbpy)]n (2) (H4L = 5,5′-(butane-1,4-diylbis (oxy))diisophthalic acid, Mbpy = 5,5′-dimethyl-2,2′-bipyridine) were obtained through hydrothermal reactions under different pH values reaction condition. Structure analyses reveal that there are uncoordinated deprotonated and protonated carboxylate groups in compounds 1 and 2, resp., which are confirmed by IR spectra. The XRD and TG studies indicate that both of compounds exhibit good water and thermal stability. The proton conductivities of the Nafion membrane doped by compounds 1 and 2 were studied. Compound 2 can enhance the proton conductivity of the composite membrane ∼29% higher than that of pure Nafion. The water uptakes of 1/Nafion and 2/Nafion composite membrane are similar and slightly higher than that of pure Nafion membrane. The apparently high proton conductivity of 2/Nafion membrane should be attributed to the high proton d. of 2 framework, which is resulted by the protonated uncoordinated carboxylate acid groups.

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Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 1762-34-1, is researched, SMILESS is CC1=CN=C(C=C1)C1=NC=C(C)C=C1, Molecular C12H12N2Journal, ACS Applied Energy Materials called Ultrafine palladium nanoparticles stabilized in the porous liquid of covalent organic cages for photocatalytic hydrogen evolution, Author is Zhang, Jian-Hua; Wei, Mei-Juan; Lu, Yu-Lin; Wei, Zhang-Wen; Wang, Hai-Ping; Pan, Mei, the main research direction is palladium nanoparticle cryptand hydrogen evolution reaction photocatalyst.HPLC of Formula: 1762-34-1.

Soluble covalent organic cages (COCs) were designed to comprise cryptand inner cavities and multiple metal-chelating sites on windows. The porous liquid formed by well-dispersed COCs in solution proves to be an excellent stabilizer for ultrafine palladium nanoparticles with a critical size of 1-3 nm using NaBH4 or methanol as a reductant. When transferring palladium nanoparticles stabilized in the porous liquid of COCs onto carbon nitride (g-C3N4), an efficient heterogeneous photocatalyst could be obtained to possess high catalytic activity for hydrogen evolution from water with long-term durability. This provides prospects for the application of porous liquids in various fields by combining advantages of homogeneous and heterogeneous attributes together.

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Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Zhang, Li; Cao, Qingbin; Gao, Fei; Dong, Yuping; Li, Xiaofang published the article 《Self-supported rhodium catalysts based on a microporous metal-organic framework for polymerization of phenylacetylene and its derivatives》. Keywords: metal organic framework supported rhodium catalyst phenylacetylene polymerization.They researched the compound: 5,5′-Dimethyl-2,2′-bipyridine( cas:1762-34-1 ).Application of 1762-34-1. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:1762-34-1) here.

A series of heterogeneous metal-organic framework (MOF)-supported rhodium (Rh) hybrid catalysts with varying amounts of Rh are first applied to the coordination polymerization of phenylacetylene and its derivatives with or without cocatalysts in different organic solvents under a nitrogen atm. or in water media under an air atm. In comparison with the known homogeneous and heterogeneous Rh catalysts, these MOF-supported Rh catalysts exhibit not only a channel confinement effect on the polymer mol. weight distribution but also a more remarkable cooperation effect, polar solvent acceleration effect, “”on water”” effect, and cocatalyst acceleration effect on the catalytic activity. As a result, these heterogeneous Rh catalysts have the advantages of an extremely high activity of up to 1.5 x 107 g molRh-1 h-1, cis-selectivity of up to 99%, and reusability of up to 10 times, affording cis-transoidal PPAs and their functional derivatives having single-handed helical conformation or aggregation-induced emission properties with moderate mol. weights and narrow mol. weight distributions. As far as we are aware, such extremely efficient Rh catalysts as well as multiple reusable heterogeneous Rh catalysts have never been reported.

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Reference:
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem