Category: 112881-51-3

《Improved Effect of Metal Coordination on Molecular Oxygen Activation for Selective Aerobic Photooxidationã€?was written by Cui, Jing-Wang; Rao, Cai-Hui; Jia, Meng-Ze; Yao, Xin-Rong; Zhang, Jie. Electric Literature of C20H14N4 And the article was included in ChemSusChem on April 22 ,2022. The article conveys some information:

A pyridinium-based complex with environment-friendly and earth-abundant ZnII ion was synthesized and explored as a green catalyst applied in activating mol. oxygen for the simple and efficient photooxidation of alcs. into aldehydes under additive-free and mild conditions. The metal coordination was conducive to promoting the electron transfer efficiency and introducing the heavy-atom effect for the increased generation of ·O2- and 1O2. Accordingly, improved photocatalytic performance of this complex compared to its precursor, no matter activity or selectivity, was obtained, facilitating the transformation of alcs. into aldehydes in a sustainable way. After reading the article, we found that the author used 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Electric Literature of C20H14N4)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals. Electric Literature of C20H14N4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Category: pyridine-derivativesOn October 15, 2021 ,《Cobalt-Catalyzed Remote Hydroboration of Alkenyl Aminesã€?was published in Organic Letters. The article was written by Lei, Yaqin; Huang, Jiaxin; Zhao, Wanxiang. The article contains the following contents:

The authors here present a generally applicable Co-catalyzed remote hydroboration of alkenyl amines, providing a practical strategy for the preparation of borylamines and aminoalcs. This method shows broad substrate scope and good functional group tolerance, tolerating alkenyl amines, including alkyl-alkyl amines, alkyl-aryl amines, aryl-aryl amines, and amides. Of note, this protocol is also compatible with a variety of natural products and drug derivatives Preliminary mechanistic studies suggest that this transformation involves an iterative chain walking and hydroboration sequence.4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Category: pyridine-derivatives) was used in this study.

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Category: pyridine-derivativesThe lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《A chitosan-based fluorescent hydrogel for selective detection of Fe2+ ions in gel-to-sol mode and turn-off fluorescence mode》 was published in Polymer Chemistry in 2019. These research results belong to Fan, Kaiqi; Wang, Xiaobo; Yu, Shuyan; Han, Guanglu; Xu, Die; Zhou, Liming; Song, Jian. Product Details of 112881-51-3 The article mentions the following:

A novel chitosan-based fluorescent hydrogel has been synthesized by chem. bonding terpyridine-bearing aldehydes onto chitosan via an acid condensation reaction. More interestingly, such a hydrogel works as a dual-mode chemosensor for selective, rapid, gel-to-sol, and turn-off fluorescence sensing of Fe2+ ions. In the gel-to-sol mode, the detection limit for Fe2+ ions is 0.28 ppm, and in the turn-off fluorescence mode, the detection limit is 3.8 ppb. Such hydrogel-based fluorescent chemosensors are potentially suitable for the monitoring of Fe2+ in biol. and environmental applications. In the part of experimental materials, we found many familiar compounds, such as 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Product Details of 112881-51-3)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Product Details of 112881-51-3 Pyridine has a conjugated system of six π electrons that are delocalized over the ring.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《A bifunctional small molecular photocatalyst with a redox center and a Lewis acid site for one-pot tandem oxidation-acetalization》 were Rao, Cai-Hui; Ma, Shuai; Cui, Jing-Wang; Jia, Meng-Ze; Yao, Xin-Rong; Zhang, Jie. And the article was published in Green Chemistry in 2022. Electric Literature of C20H14N4 The author mentioned the following in the article:

By combining the double identity of a redox center and a Lewis acid site of the pyridinium derivative, the first bifunctional small mol. photocatalyst was developed for the one-pot tandem oxidation-acetalization reaction. A mechanism study revealed that pyridinium-mediated electron transfer and the photoactivation of mol. oxygen greatly facilitate the transformation of benzyl alcs. into the corresponding aldehydes, while the Lewis acid site of this bifunctional photocatalyst promoted a highly efficient acetalization reaction without any significant loss in activity after multiple reaction cycles, thus achieving the direct conversion of various alcs. into either cyclic or acyclic acetals in good yields under mild conditions without any additives. After reading the article, we found that the author used 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Electric Literature of C20H14N4)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Electric Literature of C20H14N4 Pyridine has a conjugated system of six π electrons that are delocalized over the ring.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《MIL-101(Cr) with incorporated polypyridine zinc complexes for efficient degradation of a nerve agent simulant: spatial isolation of active sites promoting catalysis》 was published in Dalton Transactions in 2021. These research results belong to Zhang, Kai; Cao, Xingyun; Zhang, Zhiyan; Cheng, Yong; Zhou, Ying-Hua. Application of 112881-51-3 The article mentions the following:

Development of an efficient catalyst for degradation of organophosphorus toxicants is highly desirable. Herein, an MIL-101(Cr)LZn catalyst was fabricated by incorporating polypyridine zinc complexes into a MOF to achieve the spatial isolation of active sites. Compared with a terpyridine zinc complex without an MIL-101 support, this catalyst was highly active for detoxification of diethyl-4-nitrophenylphosphate. The experimental process involved the reaction of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Application of 112881-51-3)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Application of 112881-51-3 Pyridine has a conjugated system of six π electrons that are delocalized over the ring.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Hydrogen bond-induced abrupt spin crossover behaviour in 1-D cobalt(II) complexes – the key role of solvate water molecules》 were Zenno, Hikaru; Kobayashi, Fumiya; Nakamura, Masaaki; Sekine, Yoshihiro; Lindoy, Leonard F.; Hayami, Shinya. And the article was published in Dalton Transactions in 2021. Reference of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine The author mentioned the following in the article:

The magnetic properties and structural aspects of the 1-D cobalt(II) complexes, [Co(pyterpy)Cl2]·2H2O (1·2H2O; pyterpy = 4′-(4”’-pyridyl)-2,2′:6′,2”-terpyridine) and [Co(pyethyterpy)Cl2]·2H2O (2·2H2O; pyethyterpy = 4′-((4”’-pyridyl)ethynyl)-2,2′:6′,2”-terpyridine) are reported. In each complex the central cobalt(II) ion displays an octahedral coordination environment composed of three nitrogen donors from the terpyridine moiety, a nitrogen donor from a pyridyl group and two chloride ligands which occupy the axial sites. 1·2H2O exhibits abrupt spin-crossover (SCO) behavior (T1/2↓ = 218 K; T1/2↑ = 227 K) along with a thermal hysteresis loop, while 2·2H2O and the dehydrated species 1 and 2 exhibit high-spin (HS) states at 2-300 K as well as field-induced single-mol. magnet (SMM) behavior attributed to the presence of magnetic anisotropic HS cobalt(II) species (S = 3/2). 1·2H2O exhibited reversible desorption/resorption of its two water mols., revealing reversible switching between SCO and SMM behavior triggered by the dehydration/rehydration processes. Single crystal x-ray structural analyses revealed that 1·2H2O crystalizes in the orthorhombic space group Pcca while 2 and 2·2H2O crystallize in the monoclinic space group P2/n. Each of the 1-D chains formed by 1·2H2O in the solid state are bridged by hydrogen bonds between water mols. and chloride groups to form a 2-D layered structure. The water mols. bridging 1-D chains in 1·2H2O interact with the chloride ligands occupying the axial positions, complementing the effect of Jahn-Teller distortion and contributing to the abrupt SCO behavior and associated stabilization of the LS state. In the experiment, the researchers used many compounds, for example, 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Reference of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Reference of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridineThe lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Auvray, Thomas; Del Secco, Benedetta; Dubreuil, Amelie; Zaccheroni, Nelsi; Hanan, Garry S. published an article on January 4 ,2021. The article was titled 《In-Depth Study of the Electronic Properties of NIR-Emissive κ3N Terpyridine Rhenium(I) Dicarbonyl Complexes》, and you may find the article in Inorganic Chemistry.Electric Literature of C20H14N4 The information in the text is summarized as follows:

The structure-properties relationship in a series of carbonyl rhenium(I) complexes based on substituted terpyridine ligands of general formula [Re(κxN-Rtpy)(CO)yL]n+ is explored by both exptl. and theor. methods. In these compounds, the terpyridine ligands adopt both bidentate (κ2N) and terdentate (κ3N) coordination modes associated with three or two carbonyls, resp. Conversion from the κ2N to the κ3N coordination mode leads to large changes in the absorption spectra and oxidation potentials due to destabilization of the HOMO level of each complex. The absorption profiles of the κ3N complexes cover the whole visible spectra with lower maxima around 700 nm, tailing out to 800 nm, while no emission is observed with Br- as the axial ligand L. When the axial ligand is modified from the native halide to pyridine or triphenylphosphine, the lowest absorption band is blue-shifted by 60 and 90 nm, resp. These cationic complexes are near-IR emitters with emission maxima between 840 and 950 nm for the pyridine compounds and 780-800 nm for the triphenylphosphine compounds Conversion from the κ2N to the κ3N coordination mode of the terpyridine ligand in Re(I) carbonyl complexes leads to major changes in their electronic properties. The absorption profiles of the κ3N complexes cover the whole visible spectra and can be finely tuned by changing the ancillary ligand L. For complexes with L = pyridine. PPh3, near-IR emission (780-950 nm) with unusually high quantum yields (0.02-0.7%) for this class of compounds is reported. After reading the article, we found that the author used 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Electric Literature of C20H14N4)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Electric Literature of C20H14N4The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2020,Dalton Transactions included an article by Busto, Natalia; Carrion, M. Carmen; Montanaro, Sonia; Diaz de Grenu, Borja; Biver, Tarita; Jalon, Felix A.; Manzano, Blanca R.; Garcia, Begona. Category: pyridine-derivatives. The article was titled 《Targeting G-quadruplex structures with Zn(II) terpyridine derivatives: a SAR study》. The information in the text is summarized as follows:

Based on the ability of terpyridines to react with G-quadruplex DNA (G4) structures along with the interest aroused by Zn as an essential metal center in many biol. processes, the authors synthesized and characterized six Zn chloride or nitrate complexes containing terpyridine ligands with different 4′-substituents. The authors have studied their interaction with G4 and their cytotoxicity. The exptl. results revealed that the leaving group exerts a strong influence on the cytotoxicity, since the complexes bearing chloride were more cytotoxic than their nitrate analogs and an effect of the terpyridine ligand was also observed The thermal stabilization profiles showed that the greatest stabilization of hybrid G4, Tel22, was observed for the Zn complexes bearing the terpyridine ligand that contained one or two methylated 4-(imidazol-1-yl)phenyl substituents, 3Cl and 3(L)2, resp., probably due to their extra pos. charge. Stability and aquation studies for these complexes were carried out and no ligand release was detected. Complexes 3Cl and 3(L)2 were successfully internalized by SW480 cells and they seemed to be localized mainly in the nucleolus. The highest cytotoxicity, G4 selectivity and G4 affinity determined by fluorescence and ITC experiments, and subcellular localization quantified by ICP-MS measurements, rendered 3Cl a very interesting complex from a biol. standpoint. The experimental process involved the reaction of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Category: pyridine-derivatives)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Category: pyridine-derivativesThe lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Zheng, Yanping; Tan, Yan; Zhou, Wanli; Hao, Xiangrong; Liu, Xuekun; Peng, Jun published their research in Inorganic Chemistry on August 16 ,2021. The article was titled 《Three Polyoxovanadates-Based Organic-Inorganic Hybrids: Structural Variation, Bifunctional Electrocatalytic Activities, and Computational Studies》.COA of Formula: C20H14N4 The article contains the following contents:

Three bimetallic organic-inorganic hybrids based on the [V2O6]2- building unit, [Cu(pty)(V2O6)]·H2O (1), [Cu(pty)(V2O6)] (2), [Cu(tpy)(V2O6)] (3), (pty = 4′-(4”-pyridyl)-2,2′:6′,2”-terpyridine, tpy = 2,2′:6′,2”-terpyridine), were synthesized via a one-pot method. Hybrid 1 has a 1D straight chain architecture with [V2O6]2- clusters and Cu-pty complexes; hybrids 2 and 3 possess a 2D sheet structure including 10-membered rings assembled from four [Cu(pty)]2+ motifs and six [V2O6]2- clusters in 2, and two [Cu(tpy)]2+ units and eight [V2O6]2- clusters in 3. Noteworthy, hybrids 1-3 can be employed as bifunctional electrocatalysts for electroreduction of nitrite and electrooxidation of ascorbic acid. Addnl., theor. calculations including the mol. electrostatic potential and the frontier MO were performed to estimate the electronic structure of hybrids 1-3. The natural bond orbital anal. was also calculated to interpret the electron charge distribution. The experimental part of the paper was very detailed, including the reaction process of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3COA of Formula: C20H14N4)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. COA of Formula: C20H14N4The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Self-assembled heterometallic complexes showing enhanced two-photon absorption and their distribution in living cells》 were Jiang, Qin; Yang, Xinda; Xiang, Pan; Dudek, Marta; Matczyszyn, Katarzyna; Samoc, Marek; Tian, Xiaohe; Zhang, Qiong; Luo, Yuhui; Wang, Daqi; Shi, Pengfei. And the article was published in New Journal of Chemistry in 2021. COA of Formula: C20H14N4 The author mentioned the following in the article:

Heterometallic binuclear Ru-Pt and trinuclear Zn-Pt complexes were prepared via self-assembly by attaching PtII-tpy (tpy = 2,2′:6′,2”-terpyridine) onto the RuII-tpy and ZnII-bis(tpy) moiety. The visible absorption bands for Ru-Pt complexes are primarily due to RuII → tpy MLCT transitions with some overlap from PtII → tpy MLCT, while no MLCT transition is observed for the Zn-Pt complex. The emission intensity of the Ru-Pt complexes was improved relative to the mononuclear RuII precursor; however, the emission of Zn-Pt was decreased when compared with strongly emissive ZnII-bis(tpy). Z-scan results revealed relatively high two-photon absorption (TPA) cross sections σ2, with maximal values of 962 GM for Ru-Pt and 200 GM for Zn-Pt. All the heterometallic complexes localize preferably into lysosomes by confocal fluorescence imaging results, which also showed improved cell-free 1O2 quantum yield compared to their mononuclear precursor. The experimental process involved the reaction of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3COA of Formula: C20H14N4)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals. COA of Formula: C20H14N4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem