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Showing 13 to 24 of 30 entries
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Novel rapid decomposition and dissolution method for silicates using a mixed potassium metaborate/potassium carbonate flux.

Talanta

Yoshikuni N.
PMID: 18966685
Talanta. 1996 Nov;43(11):1949-54. doi: 10.1016/0039-9140(96)01983-2.

A novel method for the rapid dissolution of fused silicates in mineral acid is described. Fusion with 2.5 g of a KBO(2)-K(2)CO(3) (3:2, w/w) mixture in a platinum crucible at 1000 degrees C will decompose 0.1 g of silicate...

Electrostatic Stabilized InP Colloidal Quantum Dots with High Photoluminescence Efficiency.

Langmuir : the ACS journal of surfaces and colloids

Mnoyan AN, Kirakosyan AG, Kim H, Jang HS, Jeon DY.
PMID: 26043065
Langmuir. 2015 Jun 30;31(25):7117-21. doi: 10.1021/acs.langmuir.5b00847. Epub 2015 Jun 19.

Electrostatically stabilized InP quantum dots (QDs) showing a high luminescence yield of 16% without any long alkyl chain coordinating ligands on their surface are demonstrated. This is achieved by UV-etching the QDs in the presence of fluoric and sulfuric...

Isomerization of the methoxy radical revisited: the impact of water dimers.

Physical chemistry chemical physics : PCCP

Kumar P, Biswas P, Bandyopadhyay B.
PMID: 27711502
Phys Chem Chem Phys. 2016 Oct 12;18(40):27728-27732. doi: 10.1039/c6cp04544h.

Investigations carried out at MP2 and CCSD(T) levels of theory show that water dimers can compete with formic and sulfuric acids in catalyzing the isomerization of methoxy radicals in the lower troposphere. The rate coefficients for water catalyzed reactions...

Oxidizing elemental platinum with oleum under harsh conditions: the unique tris(disulfato)platinate(IV) [Pt(S2O7)3]2- anion.

Chemistry (Weinheim an der Bergstrasse, Germany)

Bruns J, Klüner T, Wickleder MS.
PMID: 24817390
Chemistry. 2014 Jun 10;20(24):7222-7. doi: 10.1002/chem.201402086. Epub 2014 May 09.

For the first time, direct oxidation of elemental platinum by a mineral acid to its tetravalent state was observed in course of the reaction of platinum with oleum (65 % SO3) in the presence of barium carbonate. The reaction...

Sonochemical modification of carbon nanotubes for enhanced nanocomposite performance.

Ultrasonics sonochemistry

Price GJ, Nawaz M, Yasin T, Bibi S.
PMID: 28274544
Ultrason Sonochem. 2018 Jan;40:123-130. doi: 10.1016/j.ultsonch.2017.02.021. Epub 2017 Feb 21.

Multi-walled carbon nanotubes (CNTs) have been treated using 20kHz ultrasound in combination with dilute nitric and sulfuric acids at much lower concentrations than previously reported. The measurements revealed an optimum set of sonication conditions (in this case 30min at...

A comparative study of the removal of o-xylene from gas streams using mesoporous silicas and their silica supported sulfuric acids.

Journal of hazardous materials

Gao K, Ma M, Liu Y, Ma Z.
PMID: 33440323
J Hazard Mater. 2021 May 05;409:124965. doi: 10.1016/j.jhazmat.2020.124965. Epub 2020 Dec 25.

The three types of silica supported sulfuric acids (SSA), with the same sulfuric acid loading of 9.25 mmol g

Nitration of moderately deactivated arenes with nitrogen dioxide and molecular oxygen under neutral conditions. Zeolite-induced enhancement of regioselectivity and reversal of isomer ratios.

Organic & biomolecular chemistry

Peng X, Fukui N, Mizuta M, Suzuki H.
PMID: 12945705
Org Biomol Chem. 2003 Jul 07;1(13):2326-35. doi: 10.1039/b301847d.

In the presence of zeolites, moderately deactivated arenes such as 1-nitronaphthalene, naphthonitriles, and methylated benzonitriles can be smoothly nitrated at room temperature by the combined action of nitrogen dioxide and molecular oxygen. The regioselectivity is considerably improved as compared...

Uptake measurements of ethanol on ice surfaces and on supercooled aqueous solutions doped with nitric acid between 213 and 243 K.

The journal of physical chemistry. A

Kerbrat M, Le Calvé S, Mirabel P.
PMID: 17266234
J Phys Chem A. 2007 Feb 08;111(5):925-31. doi: 10.1021/jp0635011.

Uptake of ethanol either on pure frozen ice surfaces or supercooled solutions doped with HNO3 (0.63 and 2.49 wt %) has been investigated using a coated wall flow tube coupled to a mass spectrometric detection. The experiments were conducted...

Effect of Mixing Ammonia and Alkylamines on Sulfate Aerosol Formation.

The journal of physical chemistry. A

Temelso B, Morrison EF, Speer DL, Cao BC, Appiah-Padi N, Kim G, Shields GC.
PMID: 29303585
J Phys Chem A. 2018 Feb 15;122(6):1612-1622. doi: 10.1021/acs.jpca.7b11236. Epub 2018 Feb 06.

Sulfate aerosols' cooling effect on the global climate has spurred research to understand their mechanisms of formation. Both theoretical and laboratory studies have shown that the formation of sulfate aerosols is enhanced by the presence of a base like...

Transport of some strong incompletely dissociated acids through anion-exchange membrane.

Journal of colloid and interface science

Palatý Z, Záková A.
PMID: 14611788
J Colloid Interface Sci. 2003 Dec 01;268(1):188-99. doi: 10.1016/j.jcis.2003.07.034.

Nitric and sulfuric acids belong among strong incompletely dissociated acids, so that in the description of their transport through an ion-exchange membrane, ionic equilibria have to be taken into account. The paper presents the determination of ionic mobilities and...

Rapidly functionalized, water-dispersed carbon nanotubes at high concentration.

Journal of the American Chemical Society

Wang Y, Iqbal Z, Mitra S.
PMID: 16390136
J Am Chem Soc. 2006 Jan 11;128(1):95-9. doi: 10.1021/ja053003q.

Microwave-assisted functionalization of single-wall carbon nanotubes (SWNTs) in a mixture of nitric and sulfuric acids was carried out to synthesize highly water-dispersible nanotubes. Stable concentrations as high as 10 mg/mL were obtained in deionized water that are nearly 2...

Measurement of Dielectric Properties and Microwave-Assisted Homogeneous Acid-Catalyzed Transesterification in a Monomode Reactor.

The journal of physical chemistry. A

Dall'Oglio EL, de Sousa PT, Campos DC, de Vasconcelos LG, da Silva AC, Ribeiro F, Rodrigues V, Kuhnen CA.
PMID: 26244612
J Phys Chem A. 2015 Aug 27;119(34):8971-80. doi: 10.1021/acs.jpca.5b04890. Epub 2015 Aug 12.

Microwave heating technology is dependent on the dielectric properties of the materials being processed. The dielectric properties of H2SO4, H3PO4, ClSO3H, and H3CSO3H were investigated in this study using a vector network analyzer in an open-ended coaxial probe method...

Showing 13 to 24 of 30 entries