Day: November 2, 2022

On June 30, 2019, Oliveras-Gonzalez, Cristina; Linares, Mathieu; Amabilino, David B.; Avarvari, Narcis published an article.Quality Control of [2,2′-Bipyridine]-3,3′-diamine The title of the article was Large Synthetic Molecule that either Folds or Aggregates through Weak Supramolecular Interactions Determined by Solvent. And the article contained the following:

Weak noncovalent interactions between large disk-like mols. in poorly solvating media generally give fibers where the mols. stack atop one another. A particular chiral spacing group between large aromatic moieties, which usually lead to columnar stacks, in this case gives rise to an intramolecularly folded structure in relatively polar solvents, but in very apolar solvents forms finite aggregates. The mol. that displays this behavior has a C3 sym. benzene-1,3,5-tris(3,3′-diamido-2,2′-bipyridine) (BTAB) core with three metalloporphyrin units appended to it through short chiral spacers. Quite well defined chromophore arrangements are evident by CD spectroscopy of this compound in solution, where clear exciton coupled bands of porphyrins are observed In more polar solvents where the mols. are dispersed, a relatively weak CD signal is observed as a result of intramol. folding, a feature confirmed by mol. modeling. The intramol. folding was confirmed by measuring the CD of a C2 sym. analog. The C3 sym. BTAB cores, that would normally be expected to stack in a chiral arrangement in apolar solvents, show no indication of CD, suggesting that there is no transfer of chirality through it (although the expected planar conformation of the 2,2′-bipyridine unit is confirmed by NMR spectroscopy). The incorporation of the porphyrins on the 3,3′-diamino-2,2′-bipyridine moiety spaced by a chiral unit leaves the latter incapable of assembling through supramol. π-π stacking. Rather, modeling indicates that the three metalloporphyrin units interact thanks to van der Waals interactions, favoring their close interaction over that of the BTAB units. Atomic force microscopy shows that, in contrast to other examples of mols. with the same core, disk like (rather than fibrillar one dimensional aggregates) are favored by the C3 sym. mol. The closed structures are formed through non-directional interlocking of porphyrin rings. The chiral spacer between the rigid core and the porphyrin moieties is undoubtedly important in determining the outcome in polar or less polar solvents, as modeling shows that this joint in the mol. has two favored conformations that render the mol. relatively flat, or convex. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Quality Control of [2,2′-Bipyridine]-3,3′-diamine

The Article related to preparation zinc porphyrin supramol mol folded aggregate, mol structure zinc porphyrin supramol mol folded aggregate, cd spectra zinc porphyrin supramol mol folded aggregate and other aspects.Quality Control of [2,2′-Bipyridine]-3,3′-diamine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

van Houtem, Michel H. C. J.; Martin-Rapun, Rafael; Vekemans, Jef A. J. M.; Meijer, E. W. published an article in 2010, the title of the article was Desymmetrization of 3,3′-Bis(acylamino)-2,2′-bipyridine-Based Discotics: The High Fidelity of Their Self-Assembly Behavior in the Liquid-Crystalline State and in Solution.Safety of [2,2′-Bipyridine]-3,3′-diamine And the article contains the following content:

Two novel nonsym. disk-shaped mols. 1 and 2 based on 3,3′-bis(acylamino)-2,2′-bipyridine units were synthesized by means of a statistical approach. Discotic 1 possesses six chiral dihydrocitronellyl tails and one peripheral Ph group, whereas discotic 2 possesses six linear dodecyloxy tails and one peripheral pyridyl group. Preorganization by strong intramol. hydrogen bonding and subsequent aromatic interactions induce self-assembly of the discotics. Liquid crystallinity of 1 and 2 was determined with the aid of polarized optical microscopy, differential scanning calorimetry, and X-ray diffraction. Two columnar rectangular mesophases (Colr) have been identified, whereas for C3-sym. derivatives only one Colr mesophase has been found. In solution, the molecularly dissolved state in chloroform was studied with 1H NMR spectroscopy, whereas the self-assembled state in apolar solution was examined with optical spectroscopy. These desymmetrized discotics that lack one aliphatic wedge, behave similar to the sym. parent compound To prove that the stacking behavior of discotics 1 and 2 is similar to that of reported C3-sym. derivatives, a mixing experiment of chiral 1 with C3-sym. 13 has been undertaken, and shown that they indeed belong to one type of self-assembly. This helical J-type self-assembly was further confirmed with UV-vis and photoluminescence spectroscopy. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Safety of [2,2′-Bipyridine]-3,3′-diamine

The Article related to acylaminobipyridine discotic columnar liquid crystal desymmetrization self assembly, discotic columnar liquid crystal transition enthalpy acylaminobipyridine mol orientation and other aspects.Safety of [2,2′-Bipyridine]-3,3′-diamine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On July 5, 2000, Brunsveld, L.; Zhang, H.; Glasbeek, M.; Vekemans, J. A. J. M.; Meijer, E. W. published an article.Related Products of 75449-26-2 The title of the article was Hierarchical Growth of Chiral Self-Assembled Structures in Protic Media. And the article contained the following:

The location of nine chiral penta(ethylene oxide) side chains at the periphery of a C3-sym. H-bonded extended core gives rise to a thermotropic discotic liquid crystalline material that shows lyotropic phases in polar, protic media f (N,N’,N”-tris{3-[3′-(3,4,5-tris{(2S)-2-(2-{2-[2-(2-methoxyethoxy)ethoxy]ethoxy}ethoxy)propyloxy})benzoylamino]-2,2′-bipyridyl}benzene-1,3,5-tricarbonamide). The mol. stacks self-assemble in a reversible and hierarchical fashion, and specific and subtle solvent-mol. interactions together with the created hydrophobic microenvironment account for an unprecedented stabilization of a preferred handedness of the helical stacks by cooperative intermol. interactions. The presence of either chirality or achirality at the supramol. level in the stacks can be tuned by temperature and solvent as judged from CD spectroscopy. A hierarchical growth of the self-assembly is revealed using a variety of spectroscopic techniques and DSC. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Related Products of 75449-26-2

The Article related to self assembly chiral structure protic media lyotropic liquid crystal, discotic liquid crystal methoxyethoxyethoxyethoxyethoxypropyloxybenzoylaminobipyridylbenzenetricarbonamide and other aspects.Related Products of 75449-26-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On October 12, 1977, Schmidtchen, Franz P.; Rapoport, Henry published an article.Reference of 2-Bromo-5,6-dimethoxy-3-methylpyridine The title of the article was Polyprenylpyridinols. Synthesis of piericidin analogs. And the article contained the following:

The piericidin A analogs I (n = 1, 2, 3, 9) and II were prepared for structure-activity studies on coenzyme Q inhibitors. To prepare the nucleus, 3-methoxyacetylamino-2-methylacrylonitrile was cyclized to a 4-amino-2-pyridone which Me3O+ BF4- converted to the 4-amino-2,3-dimethoxypyridine. Bromination of the acylated amine formed the 6-bromo derivative in which the 4-amino group was then replaced by hydroxy and the latter blocked by conversion to its benzyl ether with a benzylisourea. Transmetalation now gave the 6-lithio compound which was coupled with various prenyl bromides, leading to introduction of all trans polyprenyl side chains. The final 4-pyridinols were formed on selective debenzylation with butyl mercaptide. All the polyprenylpyridinols inhibited coenzyme Q electron transport to some extent, with the farnesyl analog having the same activity as piericidin A. The experimental process involved the reaction of 2-Bromo-5,6-dimethoxy-3-methylpyridine(cas: 64837-91-8).Reference of 2-Bromo-5,6-dimethoxy-3-methylpyridine

The Article related to piericidin a analog synthesis, pyridinol polypropenyl, prenylpyridinol preparation coenzyme q inhibitor, coenzyme q inhibitor, polyprenylpyridinol preparation coenzyme inhibitor and other aspects.Reference of 2-Bromo-5,6-dimethoxy-3-methylpyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On May 7, 1995, Baker, Paul K.; Jenkins, Alyn E.; Lavery, Aidan J.; Muldoon, David J.; Shawcross, Andrew published an article.Application of 636-73-7 The title of the article was The synthesis of the first examples of water-soluble seven-coordinate complexes of tungsten(II). And the article contained the following:

Reaction of the seven-coordinate complex [WI2(CO)3(NCMe)2] with two equivalent of 4-HO2CC5H4N in MeOH at room temperature gave the bis(pyridine-4-carboxylic acid) complex [WI2(CO)3(4-HO2CC5H4N)2] (1) in good yield, which, upon treatment with two equivalent of NaOH in EtOH, afforded the completely water soluble complex [WI2(CO)3(4-NaO2CC5H4N)2] (2) in good yield; reaction of the latter with an equimolar amount of 3-NaO3SC5H4N yielded [WI2(CO)3(4-NaO2CC5H4N)(3-NaO3SC5H4N)], which represents the 1st room-temperature ligand-substitution reaction in H2O of a metal carbonyl complex. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Application of 636-73-7

The Article related to tungsten water soluble seven coordinate complex, pyridinecarboxylate tungsten dinuclear carbonyl complex, pyridinesulfonate pyridinecarboxylate tungsten dinuclear carbonyl complex and other aspects.Application of 636-73-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On February 13, 2014, Stoessel, Philipp; Joosten, Dominik; Breuning, Esther; Kaiser, Joachim published a patent.Electric Literature of 39919-70-5 The title of the patent was Cyclometalated iridium and platinum complexes as phosphorescent emitters for organic electroluminescent devices. And the patent contained the following:

Iridium and platinum complexes with bi- and tridentate cyclometalated ligands [(Cy1-Cy2-Q)mMLn] (1, Cy1, Cy2 = preferably aromatic cycles, condensed with aliphatic bicyclic systems, bound through heteroatom and carbon, resp., preferably, pyridine, quinoline, phenanthridine, azole derivatives, Q = optional donor-containing group, L = auxiliary ligand; preferably, L = acetylacetonato, picolinato), useful as triplet-emitting dopants or additives for light-emitting layers in organic light-emitting devices, preferably short-wave emitters, as green or blue emitters, were prepared by cyclometalation of the corresponding proligands Cy1-Cy2H-Q with properly chosen metal precursors, such as PtCl2, K2PtCl4, PtCl2(DMSO), PtMe2(DMSO)2, PtCl2(NCPh)2, and subsequent ligand substitution for introduction of the auxiliary ligands L. In an example, solvent-free reaction of 10 mmol of tris(acetylacetonato)iridium with 60 mmol of 1-(1,1,2,2,3,3-tetramethyl-5-indanyl)isoquinoline for 100 h at 230° gave the invented complex (1a, shown as I) with 42% yield. In another example, test electroluminescent device, manufactured according to standard procedure with a light-emitting layer doped with 5% of the complex 1a exhibited electroluminescence with external quantum efficiency of 15.5% at 1000 cd/m2 at working voltage of 3.0 V with CIE(x,y) coordinates of 0.68,0.32 featuring lifetime of 18000 h. The experimental process involved the reaction of 6-(tert-Butyl)pyridin-3-amine(cas: 39919-70-5).Electric Literature of 39919-70-5

The Article related to iridium platinum cyclometalated heterocyclic bicyclic complex preparation phosphorescent emitter, electroluminescent device organic platinum iridium cyclometalated complex emitter and other aspects.Electric Literature of 39919-70-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On February 21, 1995, Inaba, Minoru; Osa, Yumi; Ogumi, Zempachi published an article.Related Products of 52243-87-5 The title of the article was Raman spectroscopic analysis of electrochemical behavior of propylviologen in Nafion. And the article contained the following:

The electrochem. and Raman spectroscopic characteristics of propylviologen incorporated into Nafion film coated on a silver electrode were studied. The results were compared with those on silver in solutions containing Triton X-100, cetyltrimethylammonium bromide (CTAB) and sodium dodecyl sulfate (SDS) micelles. Propylviologen incorporated into Nafion showed unusual electrochem. and Raman spectroscopic behavior. The half-wave potential for the 2nd step was shifted in the neg. direction with respect to that in an aqueous solution, and only a small amount of the doubly reduced form was detected by Raman spectroscopy. Similar behavior was observed in the anionic SDS micellar solution From the observed similarity, the residence sites of propylviologen in Nafion are discussed. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Related Products of 52243-87-5

The Article related to raman spectroscopy electrochem behavior propylviologen nafion, silver electrode nafion film incorporated propylviologen, micellar solution propylviologen reduction silver electrode and other aspects.Related Products of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On October 31, 1990, Kaczmarek, Lukasz; Nantka-Namirski, Pawel published an article.Name: [2,2′-Bipyridine]-3,3′-diamine The title of the article was Synthesis of N-monosubstituted [2,2′-bipyridyl]-3,3′-diamines. And the article contained the following:

The cyclocondensation reaction of 2,2′-bipyridiyl-3,3′-diamine with PhC(:NH)OEt.HCl gave 6-phenyl-5H-dipyrido[3,2-d:2′,3′-f][1,3]diazepine. Alkylation of the latter gave N-benzoyl-N’-alkyl-2,2′-bipyridiyl-3,3′-diamines which upon hydrolysis gave N-alkyl-2,2′-bipyridiyl-3,3′-diamines I [R = Bu, Me2NCH2CH2CH2, [3-(4-chlorophenyl-1-piperazinyl)propyl]]. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Name: [2,2′-Bipyridine]-3,3′-diamine

The Article related to bipyridiyldiamine cyclocondensation benzimidate, dipyridodiazepine phenyl alkylation, diazepine phenyldipyrido alkylation, alkylation phenyldipyridodiazepine, alkylbipyridiyldiamine and other aspects.Name: [2,2′-Bipyridine]-3,3′-diamine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On November 30, 1982, McPheat, W. L.; Wardlaw, A. C. published an article.Related Products of 636-73-7 The title of the article was Inhibition of nicotinic acid and nicotinamide uptake into Bordetella pertussis by structural analogs. And the article contained the following:

The nicotinic acid (I) and nicotinamide (II) structural analogs, 3-pyridinecarboxaldehyde (III) and 3-pyridinealdoxime (IV) (both 500 and 50 μM), but not isonicotinamide, isonicotinic acid, 6-aminonicotinic acid, 6-aminonicotinamide, isoniazid, 3-acetylpyridine, 3-pyridylacetic acid, N,N-diethylnicotinamide, or 3-pyridinesulfonic acid, were effective and specific inhibitors of the uptake of I and II by B. pertussis, although neither compound inhibited the growth of the bacteria in liquid medium or the oxidation of glutamate by washed suspensions. 3-Pyridylcarbinol, at the same dose, was inhibitory, but less so than III and IV. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Related Products of 636-73-7

The Article related to nicotinate nicotinamide transport metabolism bordetella, pyridinecarboxaldehyde bordetella nicotinamide uptake inhibition, pyridinealdoxime bordetella nicotinamide uptake inhibition and other aspects.Related Products of 636-73-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Pop, Flavia; Melan, Caroline; Danila, Ion; Linares, Mathieu; Beljonne, David; Amabilino, David B.; Avarvari, Narcis published an article in 2014, the title of the article was Hierarchical Self-Assembly of Supramolecular Helical Fibres from Amphiphilic C3-Symmetrical Functional Tris(tetrathiafulvalenes).Name: [2,2′-Bipyridine]-3,3′-diamine And the article contains the following content:

The preparation and self-assembly of the enantiomers of C3-sym. compounds incorporating three tetrathiafulvalene (TTF) residues is reported. The chiral citronellyl and dihydrocitronellyl alkyl chains lead to helical one dimensional stacks in solution Mol. mechanics and dynamics simulations combined with exptl. and theor. CD support the observed helicity in solution These stacks self-assemble to give fibers that have morphologies that depend on the nature of the chiral alkyl group and the medium in which the compounds aggregate. An inversion of macroscopic helical morphol. of the citronellyl compound is observed when compared to analogous 2-methylbutyl chains, which is presumably a result of the stereogenic center being further away from the core of the mol. This composition still allows both morphologies to be observed, whereas an achiral compound shows no helicity. The morphol. of the fibers also depends on the flexibility at the chain ends of the amphiphilic components, as there is not such an apparently persistent helical morphol. for the dihydrocitronellyl derivative as for that prepared from citronellyl chains. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Name: [2,2′-Bipyridine]-3,3′-diamine

The Article related to hierarchical self assembly supramol helix amphiphilic c3 sym tetrathiafulvalene, c3 symmetry, circular dichroism, electronic microscopy, supramolecular chirality, tetrathiafulvalene and other aspects.Name: [2,2′-Bipyridine]-3,3′-diamine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem