Category: 1134-35-6

Joyce, Justin P.; Portillo, Romeo I.; Nite, Collette M.; Nite, Jacob M.; Nguyen, Michael P.; Rappe, Anthony K.; Shores, Matthew P. published their research in Inorganic Chemistry in 2021. The article was titled 《Electronic Structures of Cr(III) and V(II) Polypyridyl Systems: Undertones in an Isoelectronic Analogy》.Safety of 4,4′-Dimethyl-2,2′-bipyridine The article contains the following contents:

A recently reported description of the photophys. properties of V2+ polypyridyl systems has highlighted several distinctions between isoelectronic, d3, Cr3+, and V2+ tris-homoleptic polypyridyl complexes of 2,2′-bipyridine (bpy) and 1,10-phenanthroline (phen). Here, we combine theory and exptl. data to elucidate the differences in electronic structures. We provide the first crystallog. structures of the V2+ complexes [V(bpy)3](BPh4)2 (V-1B) and [V(phen)3](OTf)2 (V2) and observe pronounced trigonal distortion relative to analogous Cr3+ complexes. We use electronic absorption spectroscopy in tandem with TD-DFT computations to assign metal-ligand charge transfer (MLCT) properties of V-1B and V2 that are unique from the intraligand transitions, 4(3IL), solely observed in Cr3+ analogs. Our newly developed natural transition spin d. (NTρα,β) plots characterize both the Cr3+ and V2+ absorbance properties. A multideterminant approach to DFT assigns the energy of the 2E state of V-1B as stabilized through electron delocalization. We find that the profound differences in excited state lifetimes for Cr3+ and V2+ polypyridyls arise from differences in the characters of their lowest doublet states and pathways for intersystem crossing, both of which stem from trigonal structural distortion and metal-ligand π-covalency. In addition to this study using 4,4′-Dimethyl-2,2′-bipyridine, there are many other studies that have used 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Safety of 4,4′-Dimethyl-2,2′-bipyridine) was used in this study.

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.Safety of 4,4′-Dimethyl-2,2′-bipyridine Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Category: pyridine-derivativesIn 2021 ,《Covalent immobilization of ruthenium polypyridyl complex on multi-walled carbon nanotube supports for oxygen evolution reaction in an alkaline solution》 was published in Journal of Power Sources. The article was written by Wu, Zhen-Yi; Zhang, Qian-Xin; Huang, Li-Jing; Xu, Yu-Jin; Tang, Ding-Liang. The article contains the following contents:

Electrocatalytic water splitting to realize the sustainable production of hydrogen is one of the key ways to gain renewable clean energy. The development of the ruthenium-terpyridine-bipyridine (bpyRutpy) complexes used as efficient homogeneous water oxidation catalysts is one of the currently hot research fields. All catalytic active sites of the homogeneous mol. catalyst are fully utilized, and show a high catalytic efficiency. However, the homogeneous mol. catalyst has some intrinsic shortages such as difficulty on separation, recovery and regeneration, and high cost. In view of this, we synthesized the multi-walled carbon nanotube (MWCNT)-based heterogeneous catalyst, MWCNT-bpyRutpy, by covalently bonding the ruthenium-based complex onto the carbon nanotubes, in order to achieve the maximum mol. catalytic efficiency of the complex. The synthesized catalyst is fully characterized by mass spectrometry, NMR spectroscopy, IR spectroscopy, UV-visible spectroscopy, photoelectron spectroscopy, Raman spectroscopy, and thermogravimetry. The formation of the nanocatalyst via fusing Ruthenium complexes to MWCNTs promotes the oxygen evolution reaction (OER) kinetics, enhances intrinsic activity, and increases the sp. surface area of electrochem. activity, and achieve excellent OER performance with a low overpotential of 436 mV at 10mAcm2, a low Tafel slope of 77.2 mV, and a relatively high turnover frequency (TOF) of 0.5833 s-1 at an overpotential of 400 mV. In the experiment, the researchers used 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Category: pyridine-derivatives)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.Category: pyridine-derivatives Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Bhowmick, Indrani; Newell, Brian S.; Shores, Matthew P. published their research in Dalton Transactions in 2021. The article was titled 《A systematic study of the influence of ligand field on the slow magnetic dynamics of Co(II)-diimine compounds》.Synthetic Route of C12H12N2 The article contains the following contents:

Herein the authors report heteroleptic Co(II) diimine complexes [Co(H2bip)2Cl2] (1), [Co(H2bip)2Br2] (2), [Co(H2bip)3]Br2·MeOH (3) and [Co(H2bip)2(Me2bpy)]Br2·(MeCN)0.5·(H2O)0.25 (4) (H2bip = 2,2′-bi-1,4,5,6-tetrahydropyrimidine, bpy = 2,2′-dipyridyl, Me2bpy = 4,4′-Me-2,2′-dipyridyl), purposefully prepared to enable a systematic study of magnetic property changes arising from the increase of overall ligand field from σ/π-donor chlorido in 1 to π-acceptor 4,4’Me-2,2’bpy in 4. The axial and rhombic anisotropy (D and E) of these compounds is sufficient to allow 1-4 to show field-induced slow relaxation of magnetization. The authors found as the effective ligand field is increased in the series, rhombicity (E/D) decreases, and the magnetic relaxation profile changes significantly, where relaxation of magnetization at a specific temperature becomes gradually faster. The authors performed mechanistic analyses of the temperature dependence of magnetic relaxation times considering Orbach relaxation processes, Raman-like relaxation and quantum tunnelling of magnetization (QTM). The effective energy barrier of the Orbach relaxation process (Ueff) is largest in 1 (19.2 cm-1) and gradually decreases in the order 1 > 2 > 3 > 4 giving a min. value in 4 (8.3 cm-1), where the Raman-like mechanism showed the possibility of different types of phonon activity below and above ~2.5 K. As a precursor of 1, the tetrahedral complex [Co(H2bip)Cl2] (1a) was also synthesized and structurally and magnetically characterized. 1A exhibits slow relaxation of magnetization under an applied d.c. field (1800 Oe) with a record slow relaxation time of 3.39 s at 1.8 K. In the experiment, the researchers used many compounds, for example, 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Synthetic Route of C12H12N2)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.Synthetic Route of C12H12N2 Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reina, Miguel; Hernandez-Ayala, Luis Felipe; Bravo-Gomez, Maria Elena; Gomez, Virginia; Ruiz-Azuara, Lena published their research in Inorganica Chimica Acta in 2021. The article was titled 《Second generation of Casiopeinas: A joint experimental and theoretical study》.Recommanded Product: 1134-35-6 The article contains the following contents:

Herein, we present the synthesis, characterization, DFT calculations and in vitro evaluation of antiproliferative activity against HeLa and MCF-7 cancer tumor cell lines of three novel second generation Casiopeinas complexes. These compounds are characterized by the substitution of the usual neg. charged secondary ligand with a neutral bidentate ligand (2AMB = 2-aminomethylbenzimidazole), in order to improve both hydrophilicity and antiproliferative activity. Geometry for the compounds in this study assumes that complexes present a five-coordination number with a square pyramidal geometry, in which two bidentate ligands are in the plane and a nitrate anion is bonded in the axial position. Among analyzed complexes, only [Cu(4,7-dimethyl-1,10-phenanthroline)(2AMB)(NO3)]NO3 (1) is shown to be more effective than the referenced cisplatin drug, against both HeLa and MCF-7 tumor cell lines. Finally, for studied compounds, structure-activity relationships are strongly determined by either the calculated molar volume (V) or the redox potential (E1/2) of CuII/CuI of the complexes. These results aim to encourage further joint exptl. theor. studies, not only to describe biol. activity, but also to predict it. The experimental part of the paper was very detailed, including the reaction process of 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Recommanded Product: 1134-35-6)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.Recommanded Product: 1134-35-6 Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Giordana, Alessia; Priola, Emanuele; Pantaleone, Stefano; Andreo, Luca; Mortati, Leonardo; Benzi, Paola; Operti, Lorenza; Diana, Eliano published an article in Dalton Transactions. The title of the article was 《HgBrI: a possible tecton for NLO molecular materials?》.Reference of 4,4′-Dimethyl-2,2′-bipyridine The author mentioned the following in the article:

Mixed Hg(II) halides were known for a long time as good NLO (nonlinear optic) materials. The NLO properties are due to the halogen disposition in the solid state and the electron distribution among the bonds formed by soft elements. The possibility of using HgBrI as a asym. tecton in the preparation of noncentrosym. crystalline compounds was studied by exploiting the coordinating power of Hg(II) toward N-donor ligands, and 7 coordination complexes were obtained. To unravel the nature of these complex systems the authors combined the data from different techniques: Raman spectroscopy, SC-XRD and Second Harmonic Generation, supported by a periodic DFT computational approach. In HgBrI crystalline products with low symmetry, the presence of substitutional disorder leads to a lack of the inversion center conferring NLO activity, which is absent in analogous complexes of Hg(II) halides. These results indicate HgBrI as an interesting tecton to obtain metallorg. NLO materials. After reading the article, we found that the author used 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Reference of 4,4′-Dimethyl-2,2′-bipyridine)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.Reference of 4,4′-Dimethyl-2,2′-bipyridine Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《A near infrared light emitting electrochemical cell with a 2.3 V turn-on voltage》 were Nemati Bideh, Babak; Shahroosvand, Hashem; Sousaraei, Ahmad; Cabanillas-Gonzalez, Juan. And the article was published in Scientific Reports in 2019. COA of Formula: C12H12N2 The author mentioned the following in the article:

We report on an organic electroluminescent device with simplified geometry and emission in the red to near IR (NIR) spectral region which, has the lowest turn-on voltage value, 2.3 V, among light emitting electrochem. cells (LEECs). We have synthesized and characterized three novel ruthenium π-extended phenanthroimidazoles which differ on their NN̂ ligands. The use of di-Me electron donating groups along with the π-extended phenanthroimidazole moiety promotes ambipolar transport thereby avoiding the use of addnl. charge transport layers. Furthermore, a facile cathode deposition method based on transfer of a molten alloy (Ga:In) on top of the active layer is deployed, thus avoiding high vacuum thermal deposition which adds versatile assets to our approach. We combine ambipolar charge transport organic complex design and a simple ambient cathode deposition to achieve a potentially cost effective red to NIR emitting device with outstanding performance, opening new avenues towards the development of simplified light emitting sources through device optimization. The results came from multiple reactions, including the reaction of 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6COA of Formula: C12H12N2)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.COA of Formula: C12H12N2 Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Eremina, J. A.; Lider, E. V.; Kuratieva, N. V.; Samsonenko, D. G.; Klyushova, L. S.; Sheven’, D. G.; Trifonov, R. E.; Ostrovskii, V. A. published their research in Inorganica Chimica Acta in 2021. The article was titled 《Synthesis and crystal structures of cytotoxic mixed-ligand copper(II) complexes with alkyl tetrazole and polypyridine derivatives》.Category: pyridine-derivatives The article contains the following contents:

A series of mixed-ligand copper(II) complexes {[Cu(phen)(L1)2]·H2O}n (1), [Cu(dmphen)(L1)2] (2), [Cu(bipy)(L1)2] (3) and [Cu2(dmbipy)2(L1)4] (4), where HL1 – 5-methyltetrazole, bipy – 2,2′-bipyridine, dmbipy – 4,4′-dimethyl-2,2′-bipyridine, phen – 1,10-phenanthroline, dmphen – 4,7-dimethyl-1,10-phenanthroline, has been synthesized. The complexes have been characterized by elemental anal., IR spectroscopy and powder x-ray diffraction. Crystal structures of some complexes have been determined by single-crystal x-ray diffraction anal. and showed distorted tetragonal-pyramidal (1) and square pyramidal ([Cu2(bipy)2(L1)4]·DMSO and 4) geometries. The crystal structure of {(H3O)0.5[Cu(phen)(μ3-H2L2)0.5(μ3-HL2)0.5]·H2O}n (5) with alkyl tetrazole H4L2 (1,3,3,5-tetra-(1H-tetrazol-5-yl)-pentane) has also been determined The complexes 1 and 5 have a zig-zag polymeric structure in which each copper(II) ion is coordinated by five N atoms, belonging to three different tetrazolate rings and one 1,10-phenantroline ligand, while [Cu2(bipy)2(L1)4]·DMSO and 4 are binuclear complexes. The effect of the compounds on viability of MCF-7 and Hep-2 cell lines has been investigated. Complexes 1, 2, 4 possess significant dose-dependent cytotoxic effect and 1, 2 are the most cytotoxic. In addition, stability of copper(II) complexes 1-4 in water-ethanol solution and phosphate buffer saline has been investigated by UV-vis spectroscopy. The interaction of complexes 1 and 3 with calf thymus DNA (CT-DNA) has also been studied by UV-vis spectroscopy. The results came from multiple reactions, including the reaction of 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Category: pyridine-derivatives)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.Category: pyridine-derivatives Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Category: pyridine-derivativesIn 2020 ,《Efficient trinuclear Ru(II)-Re(I) supramolecular photocatalysts for CO2 reduction based on a new tris-chelating bridging ligand built around a central aromatic ring》 was published in Chemical Science. The article was written by Cancelliere, Ambra M.; Puntoriero, Fausto; Serroni, Scolastica; Campagna, Sebastiano; Tamaki, Yusuke; Saito, Daiki; Ishitani, Osamu. The article contains the following contents:

We have designed and synthesized a new tris-chelating polypyridine ligand (bpy3Ph) suitable to be used as a bridging ligand (BL) for constructing various supramol. photocatalysts. The ligand bpy3Ph has been used to prepare, according to a multi-step synthetic protocol, trinuclear supramol. photocatalysts containing different metal subunits. In particular, the compounds Ru2Re and RuRe2 have been prepared, containing different ratios of components based on Ru(dmb)32+-type and Re(dmb)(CO)3Cl-type units (dmb = 4,4′-dimethyl-2,2′-bipyridine), which can play the roles of photosensitizers and catalyst units for photocatalytic CO2 reduction, resp. The trinuclear model Ru3 and mononuclear and dinuclear Ru and Ru2 precursor metal complexes, containing free chelating sites, have also been synthesized using the same bridging ligand. The absence of negligible accumulation of the mono-reduced form of the photosensitizer indicates fast electron transfer to the catalyst unit(s) through the relatively large bridging ligand and is proposed to contribute to the outstanding photocatalytic properties of the new species, including their durability. The relevant photocatalytic behavior of the new systems indicates new avenues for the design of extended bridging ligands capable of efficiently and functionally integrating photosensitizers and catalysts towards the preparation of new, larger supramol. photocatalysts for selective CO2 reduction In the experimental materials used by the author, we found 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Category: pyridine-derivatives)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.Category: pyridine-derivatives Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Category: pyridine-derivativesIn 2019 ,《Mechanistic insights on the non-innocent role of electron donors: reversible photocapture of CO2 by RuII-polypyridyl complexes》 appeared in Dalton Transactions. The author of the article were Queyriaux, Nicolas; Swords, Wesley B.; Agarwala, Hemlata; Johnson, Ben A.; Ott, Sascha; Hammarstroem, Leif. The article conveys some information:

The ability of [RuII(tButpy)(dmbpy)(MeCN)]2+ (1-MeCN) to capture CO2, with the assistance of triethanolamine (TEOA), has been assessed under photocatalytically-relevant conditions. The photolability of 1-MeCN has proven essential to generate a series of intermediates which only differ by the nature of their monodentate ligand. In DMF, ligand photoexchange of 1-MeCN to give [RuII(tButpy)(dmbpy)(DMF)]2+ (1-DMF) proceeds smoothly with a quantum yield of 0.011. However, in the presence of TEOA, this process was disrupted, leading to the formation of a mixture of 1-DMF and [RuII(tButpy)(dmbpy)(TEOA)]+ (1-TEOA). An equilibrium constant of 3 was determined Interestingly, 1-TEOA demonstrated an ability to reversibly catch and release CO2 making it a potentially crucial intermediate towards CO2 reduction4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Category: pyridine-derivatives) was used in this study.

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.Category: pyridine-derivatives Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2019,Current Organic Synthesis included an article by Chen, Mingwei; Hu, Jinyu; Tang, Xiaoli; Zhu, Qiming. Name: 4,4′-Dimethyl-2,2′-bipyridine. The article was titled 《Piperazine as an Inexpensive and Efficient Ligand for Pd-Catalyzed Homocoupling Reactions to Synthesize Bipyridines and Their Analogues》. The information in the text is summarized as follows:

In the present work, a promising approach for preparation of bipyridines and their (hetero) aromatic analogs I (Ar = 2-pyridyl, 4-O2NC6H4, quinolin-2-yl, etc.) via a Pd-catalyzed reductive homocoupling reaction with simple piperazine as a ligand is discussed . The combination of Pd(OAc)2 and piperazine in DMF was observed to form an excellent catalyst system and efficiently catalyzed the homocoupling of azaarenyl halides, in which DMF was used as the solvent without excess reductants although stoichiometric reductant was generally required to generate the low-oxidation-state active metal species in the catalytic cycles. In this case, good to excellent yields of bipyridines were obtained in the presence of 2.5 mol% of Pd(OAc)2 and 5 mol% of piperazine, using K3PO4 as a base in DMF at 140°C. The coupling reaction was operationally simple and displayed good substrate compatibility.4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Name: 4,4′-Dimethyl-2,2′-bipyridine) was used in this study.

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.Name: 4,4′-Dimethyl-2,2′-bipyridine Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem