Category: 141-86-6

In 2019,Talanta included an article by Arabahmadi, Raziyeh. Reference of 2,6-Diaminopyridine. The article was titled 《A selective chemosensor and fluorescence probe for relay recognition of cations and fluoride ions in aqueous media with logic gate function》. The information in the text is summarized as follows:

Cation to anion relay recognition was studied for the 1st time with sequential specificity (Cu2+ → F- or Co2+ → F-) using a fluorescence ON-OFF-ON mechanism. I (L1) is a receptor with high selectivity for F-, Cu2+ and Co2+ ions in the solution of DMSO/H2O with a 9:1 volume ratio. Absorption and fluorescence spectra were used to study the sensing process. Fluorescent emission intensity of L1 at 324 is quenched (switch-Off) after the addition of Cu2+ and Co2+. Surprisingly, complex L1 + Cu2+ or L1 + Co2+ is restored with addition of F- into the compound (switch-On). Consequently, implication (from emission) and inhibit (from absorption) logic gates are constructed at mol. level. The gates operate in fluorescence and absorption modes when Cu2+ and F- or Co2+ and F- were used as input materials and the fluorescence intensity signal as outputs. Based on reversible and reproducible system, a sequential memory unit with integrated ”Writing-Reading-Erasing-Reading” behavior, is developed. In the experiment, the researchers used many compounds, for example, 2,6-Diaminopyridine(cas: 141-86-6Reference of 2,6-Diaminopyridine)

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Reference of 2,6-Diaminopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《CO2 Hydrogenation to Formate Catalyzed by Ru Coordinated with a N,P-Containing Polymer》 was published in ACS Catalysis in 2020. These research results belong to Chen, Bingfeng; Dong, Minghua; Liu, Shulin; Xie, Zhenbing; Yang, Junjuan; Li, Shaopeng; Wang, Yanyan; Du, Juan; Liu, Huizhen; Han, Buxing. Name: 2,6-Diaminopyridine The article mentions the following:

Development of high-performance catalysts for carbon dioxide (CO2) hydrogenation is crucial for CO2 utilization. Herein, a heterogeneous catalyst for CO2 hydrogenation to formate was developed by coordinating the mononuclear Ru3+ center (Ru hereafter) with a N,P-containing polymer, which was synthesized from phosphonitrilic chloride trimer and 2,6-diaminopyridine. Multiple nitrogen functionalities in the polymer (N content: 25.9 wt %) containing pyridine nitrogen and phosphazene nitrogen not only provided an electron-rich coordination environment for stabilizing mononuclear Ru center but also facilitated CO2 conversion by interacting with CO2 mols. The polymer-coordinated mononuclear Ru catalysts (Ru/p-dop-POMs) could promote the hydrogenation of CO2 to formate with a turnover number (TON) up to 25.4 x 103 in aqueous solutions, and the concentration of formate in the solution could reach 3.4 mol/L. DFT calculations revealed that the electron-rich mononuclear Ru site could promote H2 dissociation, which is the rate-determining step in the reaction, thereby enhancing the catalytic activity. Systemic studies demonstrated that the synergistic effect between individually electron-rich Ru centers and nitrogen-rich polymer enhanced catalytic efficiency. In the experimental materials used by the author, we found 2,6-Diaminopyridine(cas: 141-86-6Name: 2,6-Diaminopyridine)

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Name: 2,6-Diaminopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Molybdenum carbide prepared by a salt sealing approach as an electrocatalyst for enhanced hydrogen evolution reaction》 were Lin, Zhou; Shen, Linfan; Qu, Ximing; Zhang, Junming; Jiang, Yanxia; Sun, Shigang. And the article was published in Wuli Huaxue Xuebao in 2019. Quality Control of 2,6-Diaminopyridine The author mentioned the following in the article:

Molybdenum carbide is regarded as an excellent substitute for Pt-based catalysts in the hydrogen evolution reaction (HER), owing to its low cost, superior catalytic performance, and long-term stability. In this work, salt-sealed molybdenum carbide was prepared using sodium molybdate and 2, 6-diaminopyridine as the reactive raw materials, followed by continuous salt sealing and calcination of the precursor under an inert atm. The morphol., composition and structure of salt-sealed molybdenum carbide were determined by SEM, transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and XPS. The results indicate that salt-sealed molybdenum carbide has irregular morphol. and includes nanoparticles and nanorods. A comparison of the TEM images of Mo2C with salt sealing (Mo2C/SS) and Mo2C without salt sealing (Mo2C) indicates that Mo2C/SS exhibits a smaller particle size. This suggests that salt sealing can efficiently avoid particle aggregation. The Brunauer-EmmettTeller (BET) sp. surface area of the catalysts was obtained from nitrogen adsorption/desorption isotherms. The increase in BET surface area from 2.55 to 8.14 m2·g-1 after salt sealing provides evidence for the formation of pores in the product. The results of XRD, EDS and XPS analyses show that Mo2C/SS has an orthorhombic crystal structure with molybdenum oxides on the surface, which may originate from surface oxidation Considering the results of XPS and the turnover frequency (TOF) calculation, we can conclude that the formation of pores via salt sealing contributes to the exposure of more active sites, while simultaneously enlarging the contact area with oxygen. Therefore, higher molybdenum oxide content is generated on the surface, resulting in a lower proportion of active centers (molybdenum carbides) on the catalyst surface. Furthermore, the pseudocapacitance generated by the faradaic reaction of molybdenum oxides is superimposed on the double-layer capacitance of Mo2C catalysts, which increases the double layer capacitance. Since the effect of pseudo-capacitance on Mo2C/SS is more significant, the TOF number declines after salt sealing. Compared with Mo2C, Mo2C/SS exhibits three features that promote HER mass activity: (1) the generation of large quantities of pores via salt sealing leads to an increase in the BET surface area and exposure of more active sites, which is beneficial for improving HER performance; (2) the porous structure and enlarged surface area pave the way for effective mass and charge transfer; (3) the decrease of the Tafel slope from 145 to 88 mV·dec-1. In summary, salt-sealed Mo2C exhibited enhanced HER activity with an overpotential of 175 m V to achieve a c.d. of 10 mA·cm-2. The Tafel slope for HER on salt-sealed Mo2C is 88 mV·dec-1. This can be considered as the proof of the Volmer-Heyrovsky mechanism with electrochem. desorption as the rate-determining step. In the experiment, the researchers used 2,6-Diaminopyridine(cas: 141-86-6Quality Control of 2,6-Diaminopyridine)

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Quality Control of 2,6-Diaminopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Cation-Directed Self-Assembly of Macrocyclic Diacetylene for Developing Chromogenic Polydiacetylene》 were Shin, Geon; Khazi, Mohammed Iqbal; Kundapur, Umesha; Kim, Bubsung; Kim, Youngmee; Lee, Chan Woo; Kim, Jong-Man. And the article was published in ACS Macro Letters in 2019. Computed Properties of C5H7N3 The author mentioned the following in the article:

The cation-directed self-assembly process has emerged as a fascinating approach for constructing supramol. architectures and manifested a diverse range of assembly related applications. Herein, we synthesized a macrocyclic structure containing bis-amidopyridine and photopolymerizable diacetylene template, PyMCDA. Owing to the metal coordination affinity of bis-amidopyridine and the π-π stacking characteristic of diacetylene template and complementary to the cyclic mol. framework, Cs+-directed organic nanotubes are generated via unidirectional self-assembly of PyMCDA. The monomeric PyMCDA nanotubes are transformed into the covalently crosslinked chromogenic polydiacetylene nanotubes (PyMCPDA-Cs+) by UV-promoted topochem. polymerization The result of a metal-ligand coordination characteristic, geometric parameters in solid-state assemblies, and topochem. polymerization behavior reveals a generation of Cs+ ion inserted nanotubes. Interestingly, PyMCDA-Cs+ nanotubes display thermochromic property with a brilliant blue-to-red color transition. In the experimental materials used by the author, we found 2,6-Diaminopyridine(cas: 141-86-6Computed Properties of C5H7N3)

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Computed Properties of C5H7N3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Assembling Ordered Crystals with Disperse Building Blocks》 were Santos, Peter J.; Cheung, Tung Chun; MacFarlane, Robert J.. And the article was published in Nano Letters in 2019. Synthetic Route of C5H7N3 The author mentioned the following in the article:

Conventional colloidal crystallization techniques typically require low dispersity building blocks in order to make ordered particle arrays, resulting in a practical challenge for studying or scaling these materials. Nanoparticles covered in a polymer brush therefore may be predicted to be challenging building blocks in the formation of high-quality particle superlattices, as both the nanoparticle core and polymer brush are independent sources of dispersity in the system. However, when supramol. bonding between complementary functional groups at the ends of the polymer chains are used to drive particle assembly, these “”nanocomposite tectons”” can make high quality superlattices with polymer dispersities as large as 1.44 and particle diameter relative standard deviations up to 23% without any significant change to superlattice crystallinity. Here we demonstrate and explain how the flexible and dynamic nature of the polymer chains that comprise the particle brush allows them to deform to accommodate the irregularities in building block size and shape that arise from the inherent dispersity of their constituent components. Incorporating “”soft”” components into nanomaterials design therefore offers a facile and robust method for maintaining good control over organization when the materials themselves are imperfect. After reading the article, we found that the author used 2,6-Diaminopyridine(cas: 141-86-6Synthetic Route of C5H7N3)

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Synthetic Route of C5H7N3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Guan, Qixia; Guo, Hao; Xue, Rui; Wang, Mingyue; Wu, Ning; Cao, Yujuan; Zhao, Xin; Yang, Wu published an article in 2021. The article was titled 《Electrochemical sensing platform based on covalent organic framework materials and gold nanoparticles for high sensitivity determination of theophylline and caffeineã€? and you may find the article in Microchimica Acta.Name: 2,6-Diaminopyridine The information in the text is summarized as follows:

A new covalent organic framework (COF) has been prepared with 1,3,6,8-tetra(4-formyl phenyl) pyrene (TFPPy) and 2,6-diaminopyridine (DP) as building units through a Schiff base reaction by a simple tube oven heating procedure and the structure of the COF has been characterized in detail. The obtained DP-Py COF is employed to fabricate a novel electrochem. sensing platform for sensitive and selective determination of theophylline (TP) and caffeine (CAF) simultaneously through compounding with AuNPs; the peak positions of TP and CAF are 0.95 V and 1.28 V, resp. The synergistic effect between DP-Py COF and AuNPs effectively enhances the anal. sensitivity for the target analytes. Under the optimized exptl. conditions, the electrochem. sensing platform shows a sensitive voltammetric response and wide linear range to both TP and CAF, and the detection limits are 0.19μM and 0.076μM (S/N = 3), resp. This method has been successfully used for the determination of TP and CAF in compound paracetamol capsules and black tea samples. The recovery and relative standard deviations (RSD) of TP are 99.3âˆ?01% and 97.6âˆ?01% and 1.3âˆ?.0% and 1.3âˆ?.1%, resp., and the recovery and RSD of CAF are 96.1âˆ?02% and 99.4âˆ?04% and 2.8âˆ?.9% and 1.7âˆ?.2%, resp. Compared with traditional detection methods, the constructed sensing platform has better performance and is expected to be widely used also in other real sample analyses. In addition to this study using 2,6-Diaminopyridine, there are many other studies that have used 2,6-Diaminopyridine(cas: 141-86-6Name: 2,6-Diaminopyridine) was used in this study.

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Name: 2,6-Diaminopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

COA of Formula: C5H7N3In 2021 ,《Sensing a binding event through charge transport variations using an aromatic oligoamide capsuleã€?was published in Chemical Science. The article was written by Mateus, Pedro; Jacquet, Antoine; Mendez-Ardoy, Alejandro; Boulloy, Alice; Kauffmann, Brice; Pecastaings, Gilles; Buffeteau, Thierry; Ferrand, Yann; Bassani, Dario M.; Huc, Ivan. The article contains the following contents:

The selective binding properties of a 13-mer oligoamide foldamer capsule composed of 4 different aromatic subunits are reported. The capsule was designed to recognize dicarboxylic acids through multiple-point interactions owing to a combination of protonation/deprotonation events, H-bonding, and geometrical constraints imparted by the rigidity of the foldamer backbone. Compared to tartaric acid, binding of 2,2-difluorosuccinic acid or 2,2,3,3-tetrafluorosuccinic acid resulted in symmetry breaking due to deprotonation of only one of the two carboxylic acid groups of the encapsulated species as shown by NMR studies in solution and by single-crystal X-ray diffraction in the solid state. An analogous 14-mer foldamer capsule terminated with a thiol anchoring group was used to probe the complexation event in self-assembled monolayers on Au substrates. Ellipsometry and polarization-modulation IR absorption-reflection spectroscopy studies were consistent with the formation of a single mol. layer of the foldamer capsule oriented vertically with respect to the surface. The latter underwent smooth complexation of 2,2-difluorosuccinic acid with deprotonation of one of the two carboxylic acid groups. A significant (80-fold) difference in the charge transport properties of the monolayer upon encapsulation of the dicarboxylic acid was evidenced from conducting-AFM measurements (S = 1.1 x 10-9vs. 1.4 x 10-11 ohm-1 for the empty and complexed capsule, resp.). The modulation in conductivity was assigned to protonation of the aromatic foldamer backbone. In the experimental materials used by the author, we found 2,6-Diaminopyridine(cas: 141-86-6COA of Formula: C5H7N3)

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.COA of Formula: C5H7N3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Tuning layered superstructures in precision polymers》 was published in Scientific Reports in 2020. These research results belong to Danke, Varun; Reimann, Sophie; Binder, Wolfgang H.; Gupta, Gaurav; Beiner, Mario. Product Details of 141-86-6 The article mentions the following:

An approach to influence and control layered superstructures by varying the methylene sequence length between two consecutive functional groups in linear precision polymers containing 2,6-diaminopyridine (DAP) groups is presented. Layered superstructures with repeating units involving three monomeric units along the chain direction with very high coherence lengths upto 110 nm are observed in case of shorter alkyl segments, (16 and 18 CH2 units), while more conventional layer superstructures incorporating only one monomer are found for related polymers with 20 CH2 units per methylene sequence. A building block model explaining the unusually large periodicity of three monomeric units is proposed wherein layers containing crystalline or amorphous methylene sequences occur in different combinations. Occurrence of different layered structures depending on crystallization conditions, methylene sequence length as well as functional group type is explained by a competition of H-interactions between the DAP groups and the van der Waal forces between the hydrophobic methylene groups. In the experimental materials used by the author, we found 2,6-Diaminopyridine(cas: 141-86-6Product Details of 141-86-6)

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Product Details of 141-86-6

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Pyridyl CO2 Fixation Enabled by a Secondary Hydrogen Bonding Coordination Sphere》 was published in ACS Omega in 2020. These research results belong to Gayton, Jacqueline N.; Li, Qing; Sanders, Lakeeta; Rodrigues, Roberta R.; Hill, Glake; Delcamp, Jared H.. SDS of cas: 141-86-6 The article mentions the following:

Reversible CO2 binders under ambient conditions are of significant interest for multiple applications in sensing and capture technologies. In this paper, a general systematic way to evaluate CO2 receptors with π-systems is put forward. A series of receptors (five pyridine-based and one triazine-based) are evaluated as CO2 binders in terms of number of hydrogen bonding sites, strength of hydrogen bond donors, and number of nucleophilic sites. The binding of CO2 to the receptors was probed by computational models, absorption spectroscopy, fluorescence spectroscopy, cyclic voltammetry, and 1H NMR studies. Multiple solvents with varying ionic strength additives are probed to analyze the effects on CO2-bound intermediates. The receptors were screened progressively down-selecting through the different anal. techniques arriving at a promising pyridine receptor, which shows evidence of CO2 binding with each of the anal. techniques. The diaminopyridine motif demonstrates reversible CO2 binding and has convenient substitution sites for derivatization to incorporate into functional sensor systems. In the part of experimental materials, we found many familiar compounds, such as 2,6-Diaminopyridine(cas: 141-86-6SDS of cas: 141-86-6)

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.SDS of cas: 141-86-6

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

COA of Formula: C5H7N3In 2019 ,《A new class of meta-pyridine-urea oligomers for selective identification of mercury(II) ions》 appeared in Tetrahedron Letters. The author of the article were Liu, Yajing; Chi, Chenjing; Wu, Renbo; Huang, Yong; Liu, Song; Sun, Mingyue; Sun, Yuli; Yang, Zequn; Chen, HuaLong; Wu, Zehui. The article conveys some information:

A series of new pyridine-urea oligomers were synthesized and tested for their ability to recognize ions in PBS or Ac buffer solution by fluorescence. The ability of oligourea urea to selectively recognize Hg2+ was gradually enhanced with the increase of chain, which was further proved by DFT calculation The 1:2 stoichiometry was established for the L7-Hg2+ complex on the basis of Job’s plot. The binding constant (KB) and the lowest detection limit for Hg2+ were also determined DFT calculations were used to optimize the structures of L2-7 and its Hg2+ complexes. Highly sensitive and selective probes for the recognition of Hg2+ based on this report are expected to be developed and used for in vivo detection. The results came from multiple reactions, including the reaction of 2,6-Diaminopyridine(cas: 141-86-6COA of Formula: C5H7N3)

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.COA of Formula: C5H7N3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem