Tag: 400-500

Li, Li; Yue, Jun-Ming; Qiao, Yong-Zhen; Niu, Yun-Yin; Hou, Hong-Wei published an article in 2013, the title of the article was The side chain template effect in viologen on the formation of polypseudorotaxane architecture. Six novel metal coordination polymers and their properties.Name: 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide And the article contains the following content:

The reaction of CuSCN (or CuCl2) in the presence of excess KSCN directed by viologen-based linear templates in a DMF-methanol system affords six coordination polymers, {(MV)[Cu2(SCN)4]}n (1, MV2+ = 1,1′-dimethyl-4,4′-bipyridinium), {(PrV)[Cu2(SCN)4]}n (2, PrV2+ = 1,1′-dipropyl-4,4′-bipyridinium), {(iPV)[Cu2(SCN)4]}n (3, iPV2+ = 1,1′-diisopropyl-4,4′-bipyridinium), [(1-iBV)Cu2(SCN)3]n (4, 1-iBV2+ = 1-isobutyl-4,4′-bipyridinium), {(iBV)[Cu2(SCN)4]}n (5, iBV2+ = 1,1′-diisobutyl-4,4′-bipyridinium), and {(PtV)[Cu2(SCN)4]}n (6, PtV2+ = 1,1′-dipentyl-4,4′-bipyridinium). The [Cu2(SCN)4]n anion in compounds 1, 3, and 5 adopts an infinite 2D polypseudorotaxane architecture and proved effectively that the stoppers at the end can enhance the polyrotaxane formation in the crystalline state, whereas the anion moieties in compounds 2 and 6 exhibit 1D linear architectures, suggesting dethreading from envelopes once solidifying from solution phase. Compound 4 was found to be a 2D coordination polymer with the organic ligand carrying a single charge. The side chain template effect of substituted group, UV-Vis diffuse reflectance spectra in the solid state and TGA properties of the six complexes are investigated. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Name: 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide

The Article related to copper viologen thiocyanate complex preparation crystal structure, absorption spectra copper viologen thiocyanate complex, Inorganic Chemicals and Reactions: Coordination Compounds and other aspects.Name: 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On June 28, 2019, Liu, Jinjian; Li, Jing published a patent.COA of Formula: C16H22Br2N2 The title of the patent was Two photochromic purpurine host-object MOFs material, and its preparation method and application. And the patent contained the following:

The inventive purpurine host-object MOFs material has formula of (EV)2/n[Cd(BTC)(H2O)]n·2nH2O or (PV)2/n[Cd(BTC)(H2O)]n·2nH2O, wherein EV2+ is 1,1-di(ethyl)-4,4-bipyridyl cation, and PV2+ is 1,1-di(propyl)-4,4-bipyridyl cation. One preparation method includes (1) adding 4,4-bipyridine and Et bromide in anhydrous acetonitrile, heating under reflux for 24 h, cooling, filtering, and washing to obtain 1,1-di(ethyl)-4,4-bipyridyl bromide; (2) dissolving with cadmium nitrate in deionized water; (3) dissolving 1,3,5-trimesic acid and NaOH in deionized water under heating; (4) mixing with solution of step (2), standing for 5 d, washing, and drying. The invention is simple and easy to operate, economical and non-toxic. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).COA of Formula: C16H22Br2N2

The Article related to bipyridinium cadmium trimesate mof preparation crystal structure photochromism, Inorganic Chemicals and Reactions: Coordination Compounds and other aspects.COA of Formula: C16H22Br2N2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Liu, Jinjian; Li, Jing; Lu, Wenbo published an article in 2019, the title of the article was Effect of counter cations on the photochromic behaviors of three Zn-viologen complexes.Category: pyridine-derivatives And the article contains the following content:

To determine the influence of counter cations on the photochromic properties of viologen-based compounds, with the self-assembly reaction of different viologen cations (MV2+ = 1,1′-bis(methyl)-4,4′-bipyridinium dication, EV2+ = 1,1′-bis(ethyl)-4,4′-bipyridinium dication, PV2+ = 1,1′-bis(propyl)-4,4′-bipyridinium dication), Zn2+ and H3BTC (1,3,5-benzenetricarboxylic acid), three complexes (MV)0.5[Zn(BTC)(H2O)5]·2H2O (1), (EV)0.5[Zn(BTC)(H2O)5]·H2O (2), and (PV)0.5[Zn(BTC)(H2O)5]·H2O (3) have been synthesized and structurally characterized. The photochromic behavior of the three compounds has been investigated due to the presence of electron-deficient viologen fractions. Compounds 1-3 feature similar isolated structures and all exhibit electron-transfer (ET) photochromism, which can be fine-tuned by introducing different counter cations. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Category: pyridine-derivatives

The Article related to zinc viologen complex preparation structure photochromic property, Inorganic Chemicals and Reactions: Coordination Compounds and other aspects.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On February 28, 1995, Liang, Zhaoxi; Wang, Xiaoyun; Yi, He published an article.Electric Literature of 52243-87-5 The title of the article was Electroreduction kinetics of alkyl polyviologens studied by in situ spectroscopy. And the article contained the following:

The electroreduction kinetics of several alkyl polyviologens (I), such as polypropyl viologen, polybutyl viologen, polyhexyl viologen as well as their resp. low mol. analogs (II) and a bisviologen were studied by in situ spectroscopy. The reaction order (α) and rate constant (κ) of the 1st electroreduction were calculated The effect of alkyl chain length (n) is obvious for II, κ values decrease in the order: PrV>BV>HxV. κ Values of I are lower than those of II and depend slightly on n. These facts may be attributed to the diffusion-controlled nature of the electroreduction process. The influences of viologen concentration, the supporting electrolyte and the pH value also were studied. In general, the memory time of I is longer than those of II. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Electric Literature of 52243-87-5

The Article related to electroreduction kinetics alkyl polyviologen spectroscopy, Electrochemistry: Electrodes, Electrode Reactions, and Electrode Potentials and other aspects.Electric Literature of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On December 15, 1990, Chen, Tien Teh; Fitch, Robert M. published an article.Computed Properties of 52243-87-5 The title of the article was Visible light-induced hydrogen formation from water by various 1,1′-dialkyl-4,4′-bipyridinium salts (viologens). And the article contained the following:

Visible-light-induced H generation from water by 1,1′-dialkyl-4,4′-bipyridinium compounds (viologen dyes) as electron transfer agents was investigated. Among the viologens, pentyl viologen was most efficient. The relative rate of H formation was highest when the redox potential of the viologen was near -0.65 V (vs. SCE) at pH 4.5. There was a relation between the rate of H formation and the hydrophobicity of the viologen dyes because of the heterogeneous nature of the reaction. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Computed Properties of 52243-87-5

The Article related to water photolysis hydrogen formation viologen, solar energy hydrogen formation viologen, Electrochemical, Radiational, and Thermal Energy Technology: Energy Sources and other aspects.Computed Properties of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On October 31, 1994, Satoh, Hideharu; Ohno, Hiroyuki; Tokuda, Koichi; Ohsaka, Takeo published an article.Quality Control of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide The title of the article was A study on diffusional behavior of propyl viologen in poly(ethylene oxide) polymer solvents based on a combined use of steady-state cyclic voltammetry and potential-step chronoamperometry. And the article contained the following:

The diffusion coefficient (DPV2+) and the concentration (CaPV2+) of the actually electroactive PV2+ in the poly(ethylene oxide) (PEO, average mol. weight: 400) media containing 0.1M LiClO4 and various concentrations of propylviologen dibromide (PVBr2) could be sep. estimated without previous knowledge of either, based on a combined use of steady-state cyclic voltammetry at carbon fiber electrodes (diameter: 9 μm) and potential-step chronoamperometry at glassy carbon electrodes (diameter: 1 mm) as a function of PVBr2 concentration (CPV2+ = 2-20mM) and temperature (10-60°). Both CaPV2+ and DPV2+ significantly varied with CPV2+. CPV2+ values were smaller than CPV2+, indicating that all of the dissolved PVBr2 are not actually electroactive. DPV2+ decreased with increasing CPV2+ (and CaPV2+), and the charge transport in the PEO matrix thus occurs not via the electron-hopping process between PV2+ and PV+ (the monocation state of PV2+), but via the phys. diffusion of PV2+. Further, it became apparent that at CPV2+ > 5mM the temperature dependence of DPV2+ is not the Arrhenius type and follows the VTF equation, i.e., PV2+ ions are transported along with the segmental motion of the PEO chains. Based on the DSC measurements of the PEO-LiClO4 (0.1M)-PVBr2 complexes, their glass transition temperatures decrease with increasing CPV2+, suggesting that PVBr2 function as a plasticizer. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Quality Control of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide

The Article related to propylviologen diffusion peo, redox electrochem propylviologen peo lithium perchlorate, Electrochemistry: Electrodes, Electrode Reactions, and Electrode Potentials and other aspects.Quality Control of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On January 31, 1996, Yi, He; Xiaoyun, Wang; Zhaoxi, Liang published an article.Formula: C16H22Br2N2 The title of the article was The association behavior of alkyl viologens in electroredox studied by in-situ spectroscopy. And the article contained the following:

The association behavior of first reduced state of alkyl viologens and corresponding polyviologens(V+) were studied by in-situ spectroscopy. In electroreduction process, V.+ of alkyl viologens exist predominantly in the association form on the electrode surface, this phenomenon is attributed to the absorption of V.+ on the electrode. V.+ of polyviologens with shorter alkyl groups also exist mainly in the association form. However, V.+ of polyviologens with longer alkyl groups exist mainly in the monomeric form because the flexible segments may weaken the V.+ association The association behavior of electroreduction were compared with that of photoreduction as well as chem. reduction In addition, the effect of β-cyclodextrin inclusion on the association behavior of V.+ in electroreduction was studied. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Formula: C16H22Br2N2

The Article related to alkyl viologen polyviologen electroredox association, visible spectra viologen polyviologen, Electrochemistry: Electrodes, Electrode Reactions, and Electrode Potentials and other aspects.Formula: C16H22Br2N2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On March 10, 1994, Feng, Minhui; Li, Wen; Liang, Zhaoxi published an article.Related Products of 52243-87-5 The title of the article was Electroredox behavior of alkyl viologen compounds. And the article contained the following:

Electroredox behavior of alkyl viologens and polyviologens has been investigated by using differential pulse polarog. The alkyl groups of viologen compounds influence the reduction potentials and the film forming property of reduced products on the electrode. Compared with the low mol. alkyl viologen compounds, the first reduction potentials (E1) of alkyl polyviologens are rather pos., the potential differences (ΔE) of two-step reduction potentials are larger. The halogen anions of supporting electrolytes influence the reduction potentials of viologen compounds, the order is I- > Br- > Cl- > F-. 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 alkyl viologen derivative electrochem redox reaction, reduction potential viologen halide electrolyte, Electrochemistry: Electrodes, Electrode Reactions, and Electrode Potentials and other aspects.Related Products of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On January 31, 1996, Satoh, Hideharu; Tokuda, Koichi; Ohsaka, Takeo published an article.Synthetic Route of 52243-87-5 The title of the article was Observation of intermolecular charge-transfer spectra for propyl viologen dihalides in a series of polyether media. And the article contained the following:

1,1′-Dipropyl-4,4′-bipyridinium diiodide (PV2+·2I-) in a series of polyethers (PEOs, HO(CH2CH2O)nH, n = 1 ∼ 14) gave an intermol. charge-transfer spectrum, which shifted to longer wavelength with larger absorbance in less polar medium, in the visible region. An increase in temperature resulted in an increase in absorbance as a result of an ion-dipole interaction between PV2+ cation and polyether solvent. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Synthetic Route of 52243-87-5

The Article related to intermol charge transfer spectra viologen polyether, uv spectra viologen polyether, Physical Properties of Synthetic High Polymers: Physical Properties Of Polymers and other aspects.Synthetic Route of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On October 12, 1973, there was a patent about defoliants, herbicides.Category: pyridine-derivatives The title of the patent was Herbicidal N,N’-disubstituted dipyridylium bistribromides. And the patent contained the following:

Herbicidal and defoliant bipyridine derivatives I (n = 2, 3, X = Br3; n = 2, X = ClBr2) and II (R = Me, X = Br3, ClBr2; R = Pr, X = Br3) were prepared Thus 2,2′-bipyridine was treated with Br(CH2)3Br to give 94% I (n = 3, X = Br), which on treatment with Br gave 47% I (n = 3, X = Br3). Wettable powders were prepared using HiSil 233 carrier, Daxad 11 dispersant, and Emcol L72-34 wetting agent. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Category: pyridine-derivatives

The Article related to herbicide bipyridylium halide, defoliant bipyridylium halide, Heterocyclic Compounds (More Than One Hetero Atom): Pyrimidines and Quinazolines and other aspects.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem