Tetrafluoroboric acid

Manufactured by Merck Group

Sourced in Germany, China, United States, Belgium

Tetrafluoroboric acid is a clear, colorless, and fuming liquid. It is a strong acid with a pungent odor. The primary function of tetrafluoroboric acid is as a reagent in chemical reactions and for the analysis of various materials.

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Lab products found in correlation

8 protocols using tetrafluoroboric acid

Synthesis and Characterization of CoMoCAT SWNTs

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The SWNTs (CoMoCAT (6,5) rich) were purchased from SouthWest Nanotechnologies. Sodium hydrate and sodium nitrite were obtained from Wako Pure Chemical Industries. Sodium dodecyl benzene sulfonate (SDBS), 4-hydroxyacetanilide, 1,3-dibromopropane and 1,9-dibromononan were purchased from the Tokyo Chemical Industry Co. Tetrafluoroboric acid (48 wt.% aqueous solution) and 4-methoxybenzenediazonium tetrafluoroborate were purchased from the Sigma-Aldrich Co. D₂O, potassium hydroxide, 1,5- bis(4-aminophenoxy)pentane and Styryl 13 were obtained from Cambridge Isotope Laboratories, Kishida Chemical Co., Angene International, and EXCITON Inc., respectively. All chemicals were used as received.

Shiraki T., Shiraishi T., Juhász G, & Nakashima N. (2016). Emergence of new red-shifted carbon nanotube photoluminescence based on proximal doped-site design. Scientific Reports, 6, 28393.

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Fabrication of T@fG Transistor Arrays

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Using electron beam deposition, we fabricated electrodes (50 μm × 50 μm) consisting of a 10 nm chromium adhesion layer, 100 nm gold layer, and a 125 nm silicon oxide passivation layer with a device channel length and width of 10 μm and 50 μm, respectively, onto the T@G thin film area of the SiO₂/Si substrate. The as-made T@G transistor arrays were then functionalized by immersion in 100 mM 3-fluoro-4-carboxylbenzenediazonium tetrafluoroborate for 1 day to produce the T@fG device. To synthesize the 3-fluoro-4-carboxylbenzenediazonium tetrafluoroborate (the diazonium salt), 744 mg of 4-amino-2-fluorobenzoic acid (Sigma Aldrich, 97%) and 2.67 mL of tetrafluoroboric acid (Sigma Aldrich, 48 wt%) were first dissolved in 2 mL of nanopure water with ice bath, followed by dropping 2 mL of sodium nitrite solution (670 mg in 2 mL nanopure water) and stirring for 20 min at 0 °C in an ice bath. The solution was then quenched by ~100 mL ethyl ether, filtrated and washed with ethyl ether to obtain the diazonium salt.

Peng Z., Ng A.L., Kwon H., Wang P., Chen C.F., Lee C.S, & Wang Y. (2017). Graphene as a functional layer for semiconducting carbon nanotube transistor sensors. Carbon, 125, 49-55.

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Polyurethane Foam Production Protocols

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Glacial acetic acid (GAA) (99.5 wt %), hydrogen peroxide (HP) (30 wt %) and diethylene glycol (DEG) were supplied by Avantor Performance Materials Poland (Gliwice, Poland). Ion exchange resin Amberlite^® IR 120 H and tetrafluoroboric acid (48% wt. % in water) were provided by Sigma-Aldrich (Darmstadt, Germany). Polymeric methylene-4,4′-diphenyl diisocyanate (pMDI) Ongronat^® 2100 was supplied by BorsodChem (Kazincbarcika, Hungary). Polycat^® 15 (non-emissive balanced amine catalyst), Polycat^® 140 (reactive catalyst with high selectivity towards the water-isocyanate blowing reaction), KOSMOS^® 19 (gelling catalyst), TEGOSTAB^® B 8870 (polysiloxane polyether surfactant used in high-water formulations), ORTEGOL^® 500 (cell-opener) and Dabco^® EM400 (emulsifier used in water-blown, low-density spray polyurethane foam) were supplied by Evonik Industries AG (Essen, Germany). TCPP (tris (1-chloro-2-propyl) phosphate) used as a flame retardant was purchased from Lanxess AG (Cologne, Germany).

Polaczek K, & Kurańska M. (2022). Hemp Seed Oil and Oilseed Radish Oil as New Sources of Raw Materials for the Synthesis of Bio-Polyols for Open-Cell Polyurethane Foams. Materials, 15(24), 8891.

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Synthesis of Epoxidized Soybean Oil Derivatives

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Epoxidized soybean oil (ESO), 1,2-benzenedialdehyde, 1,4-phthalaldehyde, 1,3-benzenedialdehyde, t-butyl acetoacetate, tetrafluoro boric acid, and 4,4′-biphenyldicarboxaldehyde were obtained from Sigma Aldrich (Shanghai, China). Ethyl acetate, benzaldehyde, toluene, methanol, tetrahydrofuran (THF), and ethyl acetate were obtained from Xiya Reagent (Chengdu, Sichuang, China). 1,8-Diazabicyclo (5,4,0) undec-7-ene (DBU), 4-dimethylaminopyridine (DMAP), triethylamine, and piperidine were obtained from Beijing Chemical Works (Beijing, China). All materials were used without any further purification.

Cao Z., Gao F., Zhao J., Wei X., Cheng Q., Zhong J., Lin C., Shu J., Fu C, & Shen L. (2019). Bio-Based Coating Materials Derived from Acetoacetylated Soybean Oil and Aromatic Dicarboxaldehydes. Polymers, 11(11), 1809.

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Synthesis of Polycyclic Aromatic Hydrocarbons

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Diethyl ether (≥98%), tetrafluoroboric acid (49.5–50.5%), sodium nitrite (≥97%), 4-dodecylaniline (97%), benzo[a]pyrene (≥96% HPLC), fluoranthene (98%), and naphthalene (99%) were purchased from Sigma-Aldrich and used without further purification. Ethanol (96%) and mEthanol (100%) were purchased from VWR; sulfuric acid (95–98%) was purchased from JT Baker. Milli-Q water (resistivity of 18.2 MΩ cm⁻¹) was used in all experiments.

Tijunelyte I., Betelu S., Moreau J., Ignatiadis I., Berho C., Lidgi-Guigui N., Guénin E., David C., Vergnole S., Rinnert E, & Lamy de la Chapelle M. (2017). Diazonium Salt-Based Surface-Enhanced Raman Spectroscopy Nanosensor: Detection and Quantitation of Aromatic Hydrocarbons in Water Samples. Sensors (Basel, Switzerland), 17(6), 1198.

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Synthesis of Organic Compounds using Common Reagents

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Oleic acid (90%), 4-aminophenyl disulfide (98%), 2,2′-ethylendianiline (97%), trimethyl orthoformate (99%), 1,6-hexanediol (97%), 1-methylimidazole (99%), meta-chloroperoxybenzoic acid (77%), 1,5,7-triazabicyclo[4.4.0]dec-5-ene (98%), dichloromethane (≥99%), ethyl acetate (≥99%), diethyl ether (≥99%), hexane (≥99%), m ethanol (≥99%), ethanol (96%), tetrahydrofuran (99%), tetrafluoroboric acid (57% in Et₂O), sulfuric acid (99%), NaCl (≥99%), NaHCO₃ (≥99%), Na₂SO₄ (≥99%) and Na₂SO₃ (≥99%) were purchased from Sigma-Aldrich Co., St. Louis, MO, USA, and all of them were used without further purification. All solvents used were of technical and analytical grade. Flash silica (High-purity grade, pore size 60 Å, 230–400 mesh particle size, 40–63 μm particle size, Sigma-Aldrich Co.) was used for purification. Thin-layer chromatography (TLC) was carried out by using silica gel on TLC plates (5 cm × 20 cm, silica gel matrix, fluorescent indicator, Sigma-Aldrich Co.)

Pettazzoni L., Leonelli F., Marrani A.G., Migneco L.M., Vetica F., Celio L., Napoleone V., Alfano S., Colecchia A., Amato F., Di Lisio V, & Martinelli A. (2022). Self-Healing and Reprocessable Oleic Acid-Based Elastomer with Dynamic S-S Bonds as Solvent-Free Reusable Adhesive on Copper Surface. Polymers, 14(22), 4919.

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Synthesis and Characterization of PEtOx

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Flu was purchased from UTAG (Almere, Netherlands). Defined PEtOx with an Mn of 50 kDa was synthesized as described below and according to previous literature. [60] (link) 2-Phenyl-2-oxazoline (99%), tetrafluoroboric acid (48 wt% in H2O) and methanol (>99.8%) were purchased from Sigma-Aldrich (Overijse, Belgium). Ninhydrin, barium oxide and ethyl acetate (acroseal® grade) were bought from Acros Organics (Geel, Belgium) and used as received. 2-Ethyl-2-oxazoline (Polymer Chemistry Innovations, Tuscon, USA) was purified by distillation over Ninhydrin and bariumoxide. Formic acid (FA) (>98%) and hydrochloric acid (HCl) (37% in H2O) were purchased from Sigma Aldrich (Overijse, Belgium) and used as such. All tests requiring an aqueous solution (pure H2O or 0.1 M HCl solution) were carried out with distilled water of type III as considered in ISO Standard 3696.

Becelaere J., Van Den Broeck E., Schoolaert E., Vanhoorne V., Van Guyse J.F.R., Vergaelen M., Borgmans S., Creemers K., Van Speybroeck V., Vervaet C., Hoogenboom R, & De Clerck K. (2022). Stable amorphous solid dispersion of flubendazole with high loading via electrospinning. Journal of controlled release : official journal of the Controlled Release Society, 351.

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Synthesis of Aryl Diazonium Salts

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Aryl diazonium salt D-NO 2 was prepared by the method published previously by our group. 35 2 g of 4-nitroaniline (≥99%, Sigma-Aldrich) and 10 mL of acetonitrile (≥99.9%, Sigma-Aldrich) were sequentially added to 12 mL of tetrafluoroboric acid (48% in H 2 O, Sigma-Aldrich). Then the mixed solution was transferred to an ice water bath and cooled down to 2 °C under continuous stirring. Afterwards, 2 mL of tert-butyl nitrite (90%, Sigma-Aldrich) was added to the reaction solution drop by drop. The solution was incubated for 30 min under stirring. After 3 times washes by diethyl ether (≥99.7%, Sigma-Aldrich), the resulting diazonium salt D-NO 2 was dissolved in acetone (≥99.9%, Sigma-Aldrich) and kept at room tempera-ture for drying. For the preparation of D-CCH and D-CN, 4-ethynylaniline (97%, Sigma-Aldrich) and 4-aminobenzonitrile (98%, Sigma-Aldrich) were used as corresponding precursors based on the same protocol.

Li D., Nizard P., Onidas D., Lamouri A., Pinson J., Mahouche-Chergui S., Aubertin K., Gazeau F., Luo Y, & Mangeney C. (2022). SERS tags derived from silver nanoparticles and aryl diazonium salts for cell Raman imaging. Nanoscale, 14(4).

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