Category: 971-66-4

Tsunemasa, Noritaka published the artcileContamination of an alternative antifoulant in coastal waters of Hiroshima Bay, Product Details of C23H20BN, the publication is Kankyo Kagaku (2006), 16(2), 201-211, database is CAplus.

It is well known that organotin (OT) compounds, which are used as effective antifouling biocides, have deleterious effects on nontarget marine organisms when released into water from the coatings applied to boat hulls, and environmental studies have indicated OT contamination of the marine environment on a worldwide scale. In Oct. 2001, the International Maritime Organization (IMO) adopted the International Convention on the Control of Harmful Antifouling Systems (AFS Convention), which prohibited the use of OTs as active ingredients in antifouling systems for ships. Following the international restrictions on the use of OT-based antifoulants, paint manufactures have developed many alternative products. In Japan, more than 20 chem. substances have been used or proposed as alternative compounds In the present study, Sea-nine211, KH101, Diuron, Irgarol 1051 and the latters degradation product M1 were investigated in water from Hiroshima Bay. Concentrations of Sea-nine211, Diuron, Irgarol 1051 and M1 in water samples were in the range of <0.023âˆ?.10, <0.040âˆ?.43, <0.092, and <0.031âˆ?.3 μg/L, resp. KH101 was not detected in the water samples.

Kankyo Kagaku published new progress about 971-66-4. 971-66-4 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene, name is Triphenyl(pyridin-1-ium-1-yl)borate, and the molecular formula is C8H10O2, Product Details of C23H20BN.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Weber, Jeremy E. published the artcileElectronic and Spin-State Effects on Dinitrogen Splitting to Nitrides in a Rhenium Pincer System, Computed Properties of 971-66-4, the publication is Inorganic Chemistry (2021), 60(9), 6115-6124, database is CAplus and MEDLINE.

Bimetallic nitrogen (N₂) splitting to form metal nitrides is an attractive method for N₂ fixation. Although a growing number of pincer-supported systems can bind and split N₂, the precise relation between the ligand properties and N₂ binding/splitting remains elusive. Here the authors report the first example of an N₂-bridged rhenium(III) complex, [(trans-P₂^tBuPyrr)ReCl₂]₂(μ-η¹:η¹-N₂) (P₂^tBuPyrr = [2,5-(CH₂P^tBu₂)₂C₄H₂N]^–). In this case, N₂ binding occurs at a higher oxidation level than that in other reported pincer analogs. Anal. of the electronic structure through computational studies shows that the weakly π-donor pincer ligand stabilizes an open-shell electronic configuration that leads to enhanced binding of N₂ in the bridged complex. Using SQUID magnetometry, the authors demonstrate a singlet ground state for this Re-N-N-Re complex, and the authors offer tentative explanations for antiferromagnetic coupling of the two local S = 1 sites. Reduction and subsequent heating of the rhenium(III)-dinitrogen complex leads to chloride loss and cleavage of the N-N bond with isolation of the terminal rhenium(V) nitride complex (P₂^tBuPyrr)ReNCl.

Inorganic Chemistry published new progress about 971-66-4. 971-66-4 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene, name is Triphenyl(pyridin-1-ium-1-yl)borate, and the molecular formula is C5H5F3O2, Computed Properties of 971-66-4.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Oliveira, Isabel B. published the artcileToxicity of emerging antifouling biocides to non-target freshwater organisms from three trophic levels, Recommanded Product: Triphenyl(pyridin-1-ium-1-yl)borate, the publication is Aquatic Toxicology (2017), 164-174, database is CAplus and MEDLINE.

Antifouling (AF) systems provide the most cost-effective protection against biofouling. Several AF biocides have, however, caused deleterious effects in the environment. Subsequently, new compounds have emerged that claim to be more environment-friendly, but studies on their toxicity and environmental risk are necessary in order to ensure safety. This work aimed to assess the toxicity of three emerging AF biocides, tralopyril, triphenylborane pyridine (TPBP) and capsaicin, towards non-target freshwater organisms representing three trophic levels: algae (Chlamydomonas reinhardtii), crustacean (Daphnia magna) and fish (Danio rerio). From the three tested biocides, tralopyril had the strongest inhibitory effect on C. reinhardtii growth, effective quantum yield and ATP (ATP) content. TPBP caused sub-lethal effects at high concentrations (100 and 250μg L^-1), and capsaicin had no significant effects on algae. In the D. magna acute immobilization test, the most toxic compound was TPBP. However, tralopyril has a short half-life and quickly degrades in water. With exposure solution renewals, tralopyril’s toxicity was similar to TPBP. Capsaicin did not cause any effects on daphnids. In the zebrafish embryo toxicity test (zFET) the most toxic compound was tralopyril with a 120 h – LC₅₀ of 5μg L^-1. TPBP’s 120 h – LC₅₀ was 447.5μg L^-1. Capsaicin did not cause mortality in zebrafish up to 1 mg L^-1. Sub-lethal effects on the proteome of zebrafish embryos were analyzed for tralopyril and TPBP. Both general stress-related and compound-specific protein changes were observed Five proteins involved in energy metabolism, eye structure and cell differentiation were commonly regulated by both compounds Tralopyril specifically induced the upregulation of 6 proteins implicated in energy metabolism, cytoskeleton, cell division and mRNA splicing while TPBP lead to the upregulation of 3 proteins involved in cytoskeleton, cell growth and protein folding. An ecol. risk characterization was performed for a hypothetical freshwater marina. This anal. identified capsaicin as an environment-friendly compound while tralopyril and TPBP seem to pose a risk to freshwater ecosystems. Noneless, more studies on the characterization of the toxicity, behavior and fate of these AF biocides in the environment are necessary since this information directly affects the outcome of the risk assessment.

Aquatic Toxicology published new progress about 971-66-4. 971-66-4 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene, name is Triphenyl(pyridin-1-ium-1-yl)borate, and the molecular formula is C23H20BN, Recommanded Product: Triphenyl(pyridin-1-ium-1-yl)borate.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Williams, Jack L. R. published the artcilePhotochemical decomposition of triphenylboron and its complexes, HPLC of Formula: 971-66-4, the publication is Journal of the American Chemical Society (1967), 89(17), 4538, database is CAplus.

In the direct photolysis of triphenylboron (I) in solution and N atm. by 2537 A. radiation, the formation of hydrocarbon products depended on the nature of the solvent. With I in cyclohexane, the products were only phenol and phenylboronic acid. When I was irradiated in MeOH solution, biphenyl and diene mixtures of products were obtained in low yields. Under similar conditions in MeOH solution, the piperidine complex of I yielded 32% biphenyl, 26% 1-phenyl-1,3-cyclohexadiene, 23% 1-phenyl-1,4-cyclohexadiene, and a small amount of 2-phenyl-1,3-cyclohexadiene. Similarly, the pyridine complex of I gave 63% biphenyl, 10% 1-phenyl-1,4-cyclohexadiene, 7% 3-phenyl-1,4-cyclohexadiene, and 4% 1-phenyl-1,3-cyclohexadiene. Since the absorption maximum of I depended also on the nature of the solvent, it was concluded that the alc. mol. donated an electron pair to the B atom to promote the “ate”-type photochem. rearrangement.

Journal of the American Chemical Society published new progress about 971-66-4. 971-66-4 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene, name is Triphenyl(pyridin-1-ium-1-yl)borate, and the molecular formula is C17H16O2, HPLC of Formula: 971-66-4.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Zahn, Helmut published the artcileA derivative of O-(2,4-dinitrophenyl)-DL-serine, Computed Properties of 971-66-4, the publication is Biochemische Zeitschrift (1955), 209-12, database is CAplus.

The N content of carefully purified cotton after exhaustive treatment with 2,4-(O₂N)₂C₆H₃F (Ia) (cf. C.A. 46, 7144i) increases from 0.09 to 0.22% indicating that the hydroxyl in serine has not reacted. α-N-Benzoylamino-β-hydroxyethyl propionate (I) (1.5 g.) and 1.1 g. Ia in 30 ml. dry C₆H₆, refluxed 6 hrs., evaporated in vacuo, and the residue treated with 15 ml. 2N HCl gave 5% EtCO₂CH(NHBz)CH₂OC₆H₃(NO₂)₂-2,4 (II), m. 122° (from EtOH). I (0.7 g.) was treated with 1.5 g. PhN:NC₆H₄COCl-p in 30 ml. C₅H₅N, and after 2 days H₂O added and the mass evaporated in vacuo. The residue dissolved in 50 ml. CHCl₃, extracted with aqueous KHSO₄, and chromatographed on Al₂O₃ yielded EtCO₂CH(NHBz)CH₂O₂CC₆H₄N:NPh-p, m. 154°.

Biochemische Zeitschrift published new progress about 971-66-4. 971-66-4 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene, name is Triphenyl(pyridin-1-ium-1-yl)borate, and the molecular formula is 0, Computed Properties of 971-66-4.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Pan, Huaqiang published the artcileInfluencing factors and evaluation of CaCO₃ modified with three coupling agents, Recommanded Product: Triphenyl(pyridin-1-ium-1-yl)borate, the publication is Wuhan Keji Daxue Xuebao (2013), 36(1), 64-68, database is CAplus.

KH101, KH151 and KH570 were used to modify the surface of CaCO₃, resp., to improve the surface properties, and the optimum modification conditions were determined by analyzing the factors that influenced the activation grade of modified CaCO₃. The modification effects of three coupling agents were compared by means of SEM anal. and settling volume test. The results show that, the optimum conditions for KH101 modification of CaCO₃ are the reaction temperature at 80°C, the reaction time at 70 min, the coupling agent content at 3%, and the amount of cyclohexanone five times that of CaCO₃, and the optimum conditions for KH570 and KH151 modification of CaCO₃ are the reaction temperature at 70°C, the reaction time at 70 min, the coupling agent content at 3%, and the amount of cyclohexanone five times that of CaCO₃. It is also found that modification with KH151 and KH570 is characterized by severe reunion phenomenon, while modification with KH101 can remarkably ameliorate the reunion phenomenon of CaCO₃.

Wuhan Keji Daxue Xuebao published new progress about 971-66-4. 971-66-4 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene, name is Triphenyl(pyridin-1-ium-1-yl)borate, and the molecular formula is C23H20BN, Recommanded Product: Triphenyl(pyridin-1-ium-1-yl)borate.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Kitamura, Akira published the artcileApplication of KU 5SDH-2 pelletron accelerator to elemental analyses of marine-environmental substances and agricultural products, Recommanded Product: Triphenyl(pyridin-1-ium-1-yl)borate, the publication is Kobe Daigaku Daigakuin Kaiji Kagaku Kenkyuka Kiyo (2007), 147-154, database is CAplus.

Two subjects offered in reply to a campaign for promotion of accelerator application are studied. One is quant. anal. of B content in the seabed mud, which might be related to triphenylboranepyridine (TPBP) currently used as antifouling agent. Nuclear reaction anal. (NRA) using ¹¹B(p,3α) reaction is able to quantify B concentration of the order of ppm in highly pure C, and the seabed mud in Fukae port contains B with a concentration of the order of 100 ppm, which is one order of magnitude greater than that in the earth crust. The other is elemental anal. of garlic to distinguish the place of its cultivation. Particle-induced-x-ray-emission (PIXE) anal. and ⁷Li(p,2α)-NRA are successfully applied to find that the garlic cultivated in China contains richer amount of Fe, Sr and Li than domestic one by a factor of 3.0, 2.4 and 94, resp. The accelerator analyses could be widely applied in a variety of fields of environmental science and agriculture.

Kobe Daigaku Daigakuin Kaiji Kagaku Kenkyuka Kiyo published new progress about 971-66-4. 971-66-4 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene, name is Triphenyl(pyridin-1-ium-1-yl)borate, and the molecular formula is C23H20BN, Recommanded Product: Triphenyl(pyridin-1-ium-1-yl)borate.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Yakushiji, Yuki published the artcileEvaluation for degradation of pyridine-triphenylborane anti-fouling agent in acetonitrile using capillary zone electrophoresis, Computed Properties of 971-66-4, the publication is Bunseki Kagaku (2009), 58(4), 301-304, database is CAplus.

A com. organoborane compound, pyridine-triphenylborane (PTPB), is often applied to ship hulls as an anti-fouling agent in order to keep them free from marine organisms, such as barnacles and bivalves. However, the degradation process of PTPB and its degradation products have not been well understood, because of lack of an anal. method for both PTPB and its estimated degradation products. We previously developed a procedure using capillary zone electrophoresis (CZE) with direct UV detection for the simultaneous determination of PTPB and its estimated degradation products, such as diphenylborinic acid (DPB), phenylboronic acid (MPB), and phenol. For this study, simple degradation experiments were carried out to verify the usefulness of the proposed method for further PTPB degradation investigations. That is to say, PTPB samples dissolved in acetonitrile were put in the open air and a dark place to examine the effects of the light intensity and the temperature on the degradation of PTPB. The sample solutions were analyzed by the CZE method with the elapse of time. As a result, it was suggested that the degradation of PTPB was significantly affected by the light intensity, rather than the temperature It has consequently been demonstrated that the CZE method is a useful tool to elucidate the degradation process of PTPB and its degradation products.

Bunseki Kagaku published new progress about 971-66-4. 971-66-4 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene, name is Triphenyl(pyridin-1-ium-1-yl)borate, and the molecular formula is C6H5F4NO3S, Computed Properties of 971-66-4.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Kaewchuay, Netnapit published the artcileSimultaneous determination of pyridine-triphenylborane anti-fouling agent and its degradation products in paint-waste samples using capillary zone electrophoresis with field-amplified sample injection, COA of Formula: C23H20BN, the publication is Analytical Sciences (2012), 28(12), 1191-1196, database is CAplus and MEDLINE.

We proposed a capillary zone electrophoresis (CZE) procedure using field-amplified sample injection (FASI) for the simultaneous determination of pyridine-triphenylborane (PTPB) and its degradation products: diphenylborinic acid (DPB), phenylboronic acid (MPB), and phenol. The LODs for PTPB, DPB, MPB, and phenol were, resp., 0.85, 0.88, 44, and 28 μg/L. The RSDs (n =4) for the analytes listed above were 6.2-14, 5.9-10, and 0.49-0.62% for the peak area, peak height, and migration time, resp. The compounds were extracted from paint-waste samples collected from shipyards using a silica-gel column. The extract was dissolved with acetonitrile containing 1% (volume/volume) pyridine. The samples were then analyzed using CZE, revealing resp. concentrations of 0.076-0.53, 0.015-0.36, 1.7-22, and 1.2-13 μg/g. The proposed FASI-CZE method is a simple and promising procedure that is expected to be useful for the determination of PTPB and its degradation products in paint wastes.

Analytical Sciences published new progress about 971-66-4. 971-66-4 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene, name is Triphenyl(pyridin-1-ium-1-yl)borate, and the molecular formula is C23H20BN, COA of Formula: C23H20BN.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Martins, Samantha Eslava published the artcileReview: ecotoxicity of organic and organo-metallic antifouling co-biocides and implications for environmental hazard and risk assessments in aquatic ecosystems, Related Products of pyridine-derivatives, the publication is Biofouling (2018), 34(1), 34-52, database is CAplus and MEDLINE.

A review. Hazard assessments of Irgarol 1051, diuron, 2-(thiocyanomethylthio)benzothiazole (TCMTB), dichloro-octylisothiazolin (DCOIT), chlorothalonil, dichlofluanid, thiram, zinc pyrithione, copper pyrithione, triphenylborane pyridine (TPBP), capsaicin, nonivamide, tralopyril and medetomidine were performed to establish robust environmental quality standards (EQS), based on predicted no effect concentrations (PNECs). Microalgae, zooplankton, fish and amphibians were the most sensitive ecol. groups to all the antifoulants evaluated, especially in the early life stages. No differences were identified between freshwater and seawater species. The use of toxicity tests with non-standard species is encouraged because they increase the datasets, allowing EQS to be derived from probabilistic-based PNECs while reducing uncertainties. The global ban of tributyltin (TBT) has been heralded as a major environmental success; however, substitute antifoulants may also pose risks to aquatic ecosystems. Environmental risk assessments (ERAs) have driven decision-makings for regulating antifouling products, but in many countries there is still a lack of regulation of antifouling biocides which should be addressed.

Biofouling published new progress about 971-66-4. 971-66-4 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene, name is Triphenyl(pyridin-1-ium-1-yl)borate, and the molecular formula is C23H20BN, Related Products of pyridine-derivatives.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem