Category: 1134-35-6

The author of 《Reduced phosphomolybdate hybrids as efficient visible-light photocatalysts for Cr(VI) reduction》 were Hou, Lin; Zhang, Yaqi; Ma, Yuanyuan; Wang, Yali; Hu, Zhifei; Gao, Yuanzhe; Han, Zhangang. And the article was published in Inorganic Chemistry in 2019. Recommanded Product: 1134-35-6 The author mentioned the following in the article:

Photocatalytic reduction of hexavalent chromium [Cr(VI)] is a promising technol. approach to highly efficiently and environmentally tackle the problem of Cr(VI) pollution, in which the key challenge is in the development of effective photocatalysts. In this work, highly reduced hourglass-type molybdophosphate hybrids with the formulas [Zn(mbpy)(H2O)2]2[Zn(mbpy)(H2O)]2{Zn[P4Mo6O31H7]2}·9H2O (1), [Na(H2O)2]2[Zn(mbpy)(H2O)]2[Zn(mbpy)(H2O)2]2{Zn[P4Mo6O31H6]2}·15H2O (2), and (H2mbpy){[Zn(mbpy)(H2O)]2[Zn(H2O)]2}{Zn[P4Mo6O31H6]2}·10H2O (3) (mbpy = 4,4′-dimethyl-2,2′-bipyridine) have been hydrothermally synthesized and used as photocatalysts for the reduction of Cr(VI) under mild conditions. Structural anal. showed that the inorganic moieties in crystals 1-3 are composed of a unique 0D single cluster form, a 1D chainlike structure, and a 2D-layered structure, resp., in which polyanions were constructed by hourglass-type molybdophosphates with one Zn(II) ion as the central metal. These hybrids displayed good performance for the photocatalytic reduction of Cr(VI) by virtue of their wide visible-light adsorption, suitable energy band structures, and specific spatial arrangements of polyanionic species. Among them, hybrid 2 exhibits the best photocatalytic performance with a Cr(VI) reduction conversion rate of almost 94.7% within 180 min of reaction time. The photocatalysis mechanism investigation revealed that highly reduced hourglass-type molybdophosphate clusters can be illuminated by visible light. The photoinduced electrons induced by hourglass-type polyanions can directly reduce Cr(VI) to Cr(III), while the photogenerated holes are used to oxidize the sacrificial agent iso-Pr alc. to acetone. This work provides new guidance for the design and preparation of highly efficient photocatalysts for the reduction of Cr(VI). The hourglass-type polyanion-based hybrids have excellent photocatalytic performance that may provide some new guidance for the design and preparation of highly efficient Cr(VI) removal photocatalysts. 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: 1134-35-6Recommanded Product: 1134-35-6) 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.Recommanded Product: 1134-35-6 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

《Mixed ligand copper(II) chelates derived from an O, N, S- donor tridentate thiosemicarbazone: Synthesis, spectral aspects, FMO, and NBO analysisã€?was published in Polyhedron in 2020. These research results belong to Jacob, Jinsa Mary; Kurup, M. R. Prathapachandra; Nisha, K.; Serdaroglu, Goncagul; Kaya, Savas. Electric Literature of C12H12N2 The article mentions the following:

Five new copper(II) chelates [(Cu(bmct))2] (1), [Cu(bmct)(phen)] (2), [Cu(bmct)(bipy)] (3), [Cu(bmct)(4,4′-dmbipy)] (4) and [Cu(bmct)(5,5′-dmbipy)] (5) with 5-bromo-3-methoxysalicylaldehyde-N(4)-cyclohexylthiosemicarbazone (H2bmct) as the chelating ligand and 1,10-phenanthroline, 2,2′-bipyridine, 4,4′-dimethylbipyridine, 5,5′-dimethylbipyridine as coligands were synthesized and characterized by different physicochem. techniques like CHNS anal., molar conductivity and magnetic studies, IR, UV/Vis and EPR spectral studies. In all the complexes, the thiosemicarbazone exists in thioiminolate form and coordinates to the metal through azomethine nitrogen, thioiminolate sulfur, and phenolate oxygen. EPR spectra in polycrystalline state at 298 K showed that compounds 1, 4, and 5 are isotropic, 2 is axial and 3 is rhombic in nature. In DMF at 77 K, compound 1 showed hyperfine lines in the parallel and perpendicular regions as well as superhyperfine lines due to the interaction of copper center with azomethine nitrogen of the ligand. Complex 2, in which g-II > g âŠ? 2.0023 suggests a distorted square pyramidal structure. To analyze the stability of the complexes, quantum chem. parameters like hardness, softness, polarizability, electrophilicity, electronegativity, and dipole moment were calculated and discussed within the framework of electronic structure principles known as Maximum Hardness, Min. Polarizability and Min. Electrophilicity Principles. Besides, the intramol. donor-acceptor interactions for all complexes were evaluated by using NBO anal. All calculations proved that compound 3 is the most stable chelate among them. After reading the article, we found that the author used 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Electric Literature 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.Electric Literature 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

《Regulating the magnetic dynamics of mononuclear β-diketone Dy(III) single-molecule magnets through the substitution effect on capping N-donor coligandsã€?was written by Xi, Jing; Ma, Xiufang; Cen, Peipei; Wu, Yuewei; Zhang, Yi-Quan; Guo, Yan; Yang, Jinhui; Chen, Lei; Liu, Xiangyu. Reference of 4,4′-Dimethyl-2,2′-bipyridineThis research focused ontrifluoronaphthylbutanedione mononuclear beta diketone dysprosium nitrogen donor complex; single mol magnet substitution effect trifluoronaphthylbutanedione dysprosium nitrogen donor. The article conveys some information:

A series of five mononuclear β-diketonate-Dy(III) complexes, with formulas Dy(ntfa)3(Br-bpy) (1), Dy(ntfa)3(Br2-bpy) (2), Dy(ntfa)3(5,5-(CH3)2-bpy) (3), Dy(ntfa)3(4,4-((CH3)3)2-bpy) (4) and Dy(ntfa)3(4,4-(CH3)2-bpy) (5) (ntfa = 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedione, Br-bpy = 5-bromo-2,2′-bipyridine, Br2-bpy = 4,4′-dibromo-2,2′-bipyridine, 5,5-(CH3)2-bpy = 5,5′-di-methyl-2,2′-bipyridine, 4,4-((CH3)3)2-bpy = 4,4′-di-tert-butyl-2,2′-bipyridine, and 4,4-(CH3)2-bpy = 4,4′-di-methyl-2,2′-bipyridine), have been prepared by altering the capping N-donor coligands. Dy(III) ions in all complexes possess N2O6 octa-coordinated environments, displaying a distorted square antiprismatic D4d symmetry in complexes 1-4, as well as a triangular dodecahedron D2d symmetry in 5. Magnetic investigations evidence the SIM behavior in the five complexes with the energy barriers (Ueff) of 104.19 K (1), 122.93 K (2), 84.20 K (3), 64.16 K (4) and 80.23 K (5) under zero applied dc field. The potential QTM effects in the title complexes are successfully suppressed in the presence of the extra applied fields. The crystal field parameters and orientations of the magnetic easy axes were obtained from the simulation of the magnetic data and the electrostatic model calculation The distinct electronic effects originating from the subtle changes of the substituents on the capping N-donor coligands induce varying coordination microenvironments and geometries on the Dy(III) sites, further drastically impacting the overall magnetic properties of the title complexes. The disparities of the uniaxial anisotropy and the magnetic dynamics for 1-5 have been elucidated by ab initio calculations as well. In the experiment, the researchers 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 in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.Reference of 4,4′-Dimethyl-2,2′-bipyridine 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

The author of 《Synthesis and biological properties of tetranuclear ruthenium complexes containing the bis[4(4′-methyl-2,2′-bipyridyl)]-1,7-heptane ligandã€?were Sun, Biyun; Sundaraneedi, Madhu K.; Southam, Hannah M.; Poole, Robert K.; Musgrave, Ian F.; Keene, F. Richard; Collins, J. Grant. And the article was published in Dalton Transactions in 2019. Reference of 4,4′-Dimethyl-2,2′-bipyridine The author mentioned the following in the article:

Linear and non-linear tetranuclear ruthenium(II) complexes containing the bridging ligand bis[4(4′-methyl-2,2′-bipyridyl)]-1,7-heptane have been synthesized and their biol. properties examined The min. inhibitory concentrations (MIC) and the min. bactericidal concentrations (MBC) of the ruthenium(II) complexes were determined against six strains of bacteria: Gram-pos. Staphylococcus aureus (S. aureus) and methicillin-resistant S. aureus (MRSA); and the Gram-neg. Escherichia coli (E. coli) strains MG1655, APEC, UPEC and Pseudomonas aeruginosa (P. aeruginosa). The results showed that both tetranuclear complexes had significant antimicrobial activity, with the non-linear (branched) species (Rubb7-TNL) having slightly higher activity than the corresponding linear analog (Rubb7-TL). The corresponding toxicity against three eukaryotic cell lines – BHK (baby hamster kidney), Caco-2 (heterogeneous human epithelial colorectal adenocarcinoma) and Hep-G2 (liver carcinoma) – have also been determined Interestingly, both Rubb7-TNL and Rubb7-TL were as toxic to the eukaryotic cells as they were to the bacteria, a rarity for kinetically-inert cationic polypyridylruthenium(II) complexes, and exhibited lower IC50 values than cisplatin over 24-, 48- or 72-h incubation times. Fluorescence spectroscopy was used to study the binding of the ruthenium complexes with human serum albumin (HSA). Rubb7-TNL and Rubb7-TL exhibited strong HSA binding, with equilibrium binding constants in the order of 107 M-1. Confocal microscopy was used to examine the cellular localization of Rubb7-TNL in BHK cells. The results indicated that the ruthenium complex localized in the nucleolus. Significant accumulation was also observed in the cytoplasm, but not in the mitochondria. Taken together, the results of this study suggest that Rubb7-TNL is an unlikely candidate as an antimicrobial agent, but may have potential as an anticancer drug.4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Reference 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.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 《Synthesis and biological properties of tetranuclear ruthenium complexes containing the bis[4(4′-methyl-2,2′-bipyridyl)]-1,7-heptane ligand》 were Sun, Biyun; Sundaraneedi, Madhu K.; Southam, Hannah M.; Poole, Robert K.; Musgrave, Ian F.; Keene, F. Richard; Collins, J. Grant. And the article was published in Dalton Transactions in 2019. Reference of 4,4′-Dimethyl-2,2′-bipyridine The author mentioned the following in the article:

Linear and non-linear tetranuclear ruthenium(II) complexes containing the bridging ligand bis[4(4′-methyl-2,2′-bipyridyl)]-1,7-heptane have been synthesized and their biol. properties examined The min. inhibitory concentrations (MIC) and the min. bactericidal concentrations (MBC) of the ruthenium(II) complexes were determined against six strains of bacteria: Gram-pos. Staphylococcus aureus (S. aureus) and methicillin-resistant S. aureus (MRSA); and the Gram-neg. Escherichia coli (E. coli) strains MG1655, APEC, UPEC and Pseudomonas aeruginosa (P. aeruginosa). The results showed that both tetranuclear complexes had significant antimicrobial activity, with the non-linear (branched) species (Rubb7-TNL) having slightly higher activity than the corresponding linear analog (Rubb7-TL). The corresponding toxicity against three eukaryotic cell lines – BHK (baby hamster kidney), Caco-2 (heterogeneous human epithelial colorectal adenocarcinoma) and Hep-G2 (liver carcinoma) – have also been determined Interestingly, both Rubb7-TNL and Rubb7-TL were as toxic to the eukaryotic cells as they were to the bacteria, a rarity for kinetically-inert cationic polypyridylruthenium(II) complexes, and exhibited lower IC50 values than cisplatin over 24-, 48- or 72-h incubation times. Fluorescence spectroscopy was used to study the binding of the ruthenium complexes with human serum albumin (HSA). Rubb7-TNL and Rubb7-TL exhibited strong HSA binding, with equilibrium binding constants in the order of 107 M-1. Confocal microscopy was used to examine the cellular localization of Rubb7-TNL in BHK cells. The results indicated that the ruthenium complex localized in the nucleolus. Significant accumulation was also observed in the cytoplasm, but not in the mitochondria. Taken together, the results of this study suggest that Rubb7-TNL is an unlikely candidate as an antimicrobial agent, but may have potential as an anticancer drug.4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Reference 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.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

Tomas, Federico M. A.; Peyrot, Analia M.; Fagalde, Florencia published their research in Polyhedron in 2021. The article was titled 《Synthesis, spectroscopic characterization and theoretical studies of polypyridine homoleptic Cu (I) complexes》.Computed Properties of C12H12N2 The article contains the following contents:

The authors focus on the synthesis and physicochem. characterization of four mononuclear copper(I) complexes with π-conjugated ligands substituted by Me groups of formulas [CuL2]+ with L = dmb, dmp, tmp and phen (dmb = 4,4′-dimethyl-2,2′-bipyridine; dmp = 5,6-dimethyl-1,10- phenanthroline; tmp = 3,4,7,8-tetramethyl-1,10-phenanthroline and phen = 1,10-phenanthroline). By TD-DFT it was possible to discuss and rationalize the geometry of the complexes and the origin of metal-to-ligand charge transfer in a square-planar distortion state. In the part of experimental materials, we found many familiar compounds, such as 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Computed Properties 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.Computed Properties 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

In 2022,Itagaki, Ren; Takizawa, Shin-ya; Chang, Ho-Chol; Nakada, Akinobu published an article in Dalton Transactions. The title of the article was 《Light-induced electron transfer/phase migration of a redox mediator for photocatalytic C-C coupling in a biphasic solution》.Synthetic Route of C12H12N2 The author mentioned the following in the article:

Photocatalytic mol. conversions that lead to value-added chems. are of considerable interest. To achieve highly efficient photocatalytic reactions, it is equally important as it is challenging to construct systems that enable effective charge separation Here, we demonstrate that the rational construction of a biphasic solution system with a ferrocenium/ferrocene (Fc+/Fc) redox couple enables efficient photocatalysis by spatial charge separation using the liquid-liquid interface. In a single-phase system, exposure of a 1,2-dichloroethane (DCE) solution containing a Ru(II)- or Ir(III)-based photosensitizer, Fc, and benzyl bromide (Bn-Br) to visible-light irradiation failed to generate any product. However, the photolysis in a H2O/DCE biphasic solution, where the compounds are initially distributed in the DCE phase, facilitated the reductive coupling of Bn-Br to dibenzyl (Bn2) using Fc as an electron donor. The key result of this study is that Fc+, generated by photooxidation of Fc in the DCE phase, migrates to the aqueous phase due to the drastic change in its partition coefficient compared to that of Fc. This liquid-liquid phase migration of the mediator is essential for facilitating the reduction of Bn-Br in the DCE phase as it suppresses backward charge recombination. The co-existence of anions can further modify the driving force of phase migration of Fc+ depending on their hydrophilicity; the best photocatalytic activity was obtained with a turnover frequency of 79.5 h-1 and a quantum efficiency of 0.2% for the formation of Bn2 by adding NBu4+Br- to the biphasic solution This study showcases a potential approach for rectifying electron transfer with suppressed charge recombination to achieve efficient photocatalysis. The experimental part of the paper was very detailed, including the reaction process of 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

《Green to blue-green-emitting cationic iridium complexes with a CF3-substituted phenyl-triazole type cyclometalating ligand: synthesis, characterization and their use for efficient light-emitting electrochemical cells》 was written by Yu, Renyou; Song, Yongjun; Chen, Mengzhen; He, Lei. Electric Literature of C12H12N2This research focused ontrifluoromethyl phenyltriazole green preparation iridium complexation; cyclometalated trifluoromethyl phenyltriazole iridium complex preparation electrochem cell; crystal mol structure electroluminescence cyclometalated trifluoromethyl phenyltriazole iridium complex. The article conveys some information:

Green to blue-green-emitting cationic iridium complexes free of sp2 C-F bonds, namely [Ir(CF3-dPhTAZ)2(bpy)]PF6 (1), [Ir(CF3-dPhTAZ)2(dmebpy)]PF6 (2) and [Ir(CF3-dPhTAZ)2(phpyim)]PF6 (3), have been designed and synthesized with 3,4-diphenyl-5-(trifluoromethyl)-4H-1,2,4-triazole (CF3-dPhTAZ) as the cyclometalating ligand (C^N) and 2,2′-bipyridine (bpy), 4,4′-dimethyl-2,2′-bipyridine (dmebpy) or 2-(1-phenyl-1H-imidazol-2-yl)pyridine (phpyim) as the ancillary ligand (N^N). In CH3CN solution, complexes 1-3 afford green to blue-green emission centered at 521, 508 and 498 nm, resp. The electron-withdrawing CF3 group attached at the triazole ring in CF3-dPhTAZ largely blue-shifts (by over 20 nm) the emission of the complex through stabilizing the HOMO. In doped films, the complexes afford sky-blue emission with near-unity phosphorescent efficiencies. In neat films, the complexes show largely suppressed phosphorescence concentration-quenching, with phosphorescent efficiencies of up to 0.66. Theor. calculations reveal that the emission of the complexes can arise from either charge-transfer (Ir → C^N/C^N → N^N) or C^N/N^N-centered 3π-π* states, depending on the local environment of the complexes. Solid-state light-emitting electrochem. cells (LECs) based on the complexes afford green to blue-green electroluminescence centered at 525, 517 and 509 nm, resp., with high current efficiencies of up to 35.1 cd A-1. The work reveals that CF3-dPhTAZ is a promising C^N ligand free of sp2 C-F bonds for constructing efficient cationic iridium complexes with blue-shifted emission. In the experiment, the researchers used many compounds, for example, 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Electric Literature of C12H12N2)

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.Electric Literature of C12H12N2 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,Dalton Transactions included an article by Wang, Yaqin; Xu, Xinxin; Liu, Luyao; Chen, Jin; Shi, Guimei. Related Products of 1134-35-6. The article was titled 《A coordination polymer-derived Co3O4/Co-N@NMC composite material as a Zn-air battery cathode electrocatalyst and microwave absorber》. The information in the text is summarized as follows:

Zn-air batteries, promising energy storage equipment with high energy d., light weight and a compact structure, are a perfect power source for elec. vehicles. For a Zn-air battery, the activity of the air cathode electrocatalyst plays an important role in its performance. Here, employing a coordination polymer as a precursor, a composite material built from Co3O4 and Co-N active centers with nitrogen-doped mesoporous carbon as a matrix has been synthesized successfully. This composite material possesses outstanding activity and stability in the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) processes. It possesses a small half-wave potential (ORR1/2 = 0.786 V) and low overpotential (OER10 = 1.575 V) for the ORR and OER, resp. With this composite material as an air cathode electrocatalyst, a rechargeable Zn-air battery was assembled successfully. During the discharge process, the maximum power d. of this Zn-air battery is 122 mW cm-2 at 0.76 V. The specific capacity of this battery is 505 mA h g-1 at 25 mA cm-2. The voltage gap between the charge and discharge processes is only 0.744 V at 10 mA cm-2 and 1.308 V at 100 mA cm-2. This rechargeable battery also shows promising stability after long-term charge-discharge experiments Furthermore, the composite material also exhibits outstanding microwave adsorption properties. Its maximum reflection loss (RL) arrives at -13.9 dB with a thickness of only 1.0 mm. Thus, we find that coordination polymers are an ideal precursor for Zn-air battery cathode electrocatalysts and microwave absorbers. In the experiment, the researchers used many compounds, for example, 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Related Products of 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.Related Products of 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,Wang, Yiran; Fukuda, Masayuki; Nikolaev, Sergey; Miyake, Atsushi; Griffith, Kent J.; Nisbet, Matthew L.; Hiralal, Emily; Gautier, Romain; Fisher, Brandon L.; Tokunaga, Masashi; Azuma, Masaki; Poeppelmeier, Kenneth R. published an article in Inorganic Chemistry. The title of the article was 《Two Distinct Cu(II)-V(IV) Superexchange Interactions with Similar Bond Angles in a Triangular “”CuV2″” Fragment》.Reference of 4,4′-Dimethyl-2,2′-bipyridine The author mentioned the following in the article:

The strength and sign of superexchange interactions are often predicted on the basis of the bond angles between magnetic ions, but complications may arise in situations with a nontrivial arrangement of the magnetic orbitals. We report on a novel mol. tetramer compound [Cu(H2O)dmbpy]2[V2O2F8] (dmbpy = 4,4′-dimethyl-2,2′-bipyridyl) that is composed of triangular “”CuV2″” fragments and displays a spin gap behavior. By combining first-principles calculations and electronic models, we reveal that superexchange Cu-V interactions carry drastically different coupling strengths along two Cu-F-V pathways with comparable bond angles in the triangular “”CuV2″” fragment. Counterintuitively, their strong disparity is found to originate from the restricted symmetry of the half-filled Cu dx2-y2 orbital stabilized by the crystal field, leading to one dominating antiferromagnetic Cu-V coupling in each fragment. We revisit the magnetic properties of the reported spin-gapped chain compound [enH2]Cu(H2O)2[V2O2F8] (enH2 = ethylene diammonium) containing similar triangular “”CuV2″” fragments, and the magnetic behavior of the mol. tetramer and the chain compounds is rationalized as that of weakly coupled spin dimers and spin trimers, resp. This work demonstrates that fundamentally different magnetic couplings can be observed between magnetic ions with similar bond angles in a single spin motif, thus providing a strategy to introduce various exchange interactions combined with low dimensionality in heterometallic Cu(II)-V(IV) compounds The experimental process involved the reaction of 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