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Showing 1069 to 1080 of 1102 entries
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Kinetically controlled E-selective catalytic olefin metathesis.

Science (New York, N.Y.)

Nguyen TT, Koh MJ, Shen X, Romiti F, Schrock RR, Hoveyda AH.
PMID: 27126041
Science. 2016 Apr 29;352(6285):569-75. doi: 10.1126/science.aaf4622.

A major shortcoming in olefin metathesis, a chemical process that is central to research in several branches of chemistry, is the lack of efficient methods that kinetically favor E isomers in the product distribution. Here we show that kinetically...

Heterometallic Rings: Their Physics and use as Supramolecular Building Blocks.

Angewandte Chemie (International ed. in English)

McInnes EJ, Timco GA, Whitehead GF, Winpenny RE.
PMID: 26459810
Angew Chem Int Ed Engl. 2015 Nov 23;54(48):14244-69. doi: 10.1002/anie.201502730. Epub 2015 Oct 13.

An enormous family of heterometallic rings has been made. The first were Cr7 M rings where M = Ni(II), Zn(II), Mn(II), and rings have been made with as many as fourteen metal centers in the cyclic structure. They are...

Selecting Quantum-Chemical Methods for Lanthanide-Containing Molecules: A Balance between Accuracy and Efficiency.

Inorganic chemistry

McCarver GA, Hinde RJ, Vogiatzis KD.
PMID: 32678585
Inorg Chem. 2020 Aug 03;59(15):10492-10500. doi: 10.1021/acs.inorgchem.0c00808. Epub 2020 Jul 17.

An analysis of how different density functionals, basis sets, and relativistic approximations affect the computed properties of lanthanide-containing molecules allows one to determine which method provides the highest accuracy. Historically, many different density functional methods have been employed to...

Author Correction: Influence of pure fluorides and stannous ions on the initial bacterial colonization in situ.

Scientific reports

Kirsch J, Hannig M, Winkel P, Basche S, Leis B, Pütz N, Kensche A, Hannig C.
PMID: 32214111
Sci Rep. 2020 Mar 25;10(1):5695. doi: 10.1038/s41598-020-62064-1.

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Effect of oral environment and prescribed fluoride mouthwashes on different types of TMA wires - An .

Journal of orthodontic science

Rajendran A, Sundareswaran S, Peediyekkal LV, Santhakumar P, Sathyanadhan S.
PMID: 31161131
J Orthod Sci. 2019 May 23;8:8. doi: 10.4103/jos.JOS_72_18. eCollection 2019.

OBJECTIVE: The aim of this study was to investigate the effect of intraoral conditions and fluoride mouthwashes on mechanical properties and surface characteristics of different types of titanium molybdenum alloy (TMA) wires.MATERIALS AND METHODS: Three types of TMA wires...

Evaluation of an intervention to promote minimally invasive dentistry (MID) in an Australian community dental agency-A pilot study.

International journal of dental hygiene

Nguyen TM, Tonmukayakul U, Calache H.
PMID: 34018672
Int J Dent Hyg. 2021 May 21; doi: 10.1111/idh.12523. Epub 2021 May 21.

OBJECTIVES: To evaluate the impact of an intervention consisting of a 1-day continuing professional development (CPD) education programme on the International Caries Classification and Management System (ICCMSMETHODS: A quasi non-randomized controlled trial with convenience sampling method was adopted. Fourteen...

Electrochemical Oxo-Fluorosulfonylation of Alkynes under Air: Facile Access to β-Keto Sulfonyl Fluorides.

Angewandte Chemie (International ed. in English)

Chen D, Nie X, Feng Q, Zhang Y, Wang Y, Wang Q, Huang L, Huang S, Liao S.
PMID: 34729882
Angew Chem Int Ed Engl. 2021 Nov 02; doi: 10.1002/anie.202112118. Epub 2021 Nov 02.

Radical fluorosulfonylation is emerging as an appealing approach for the synthesis of sulfonyl fluorides, which have widespread applications in many fields, in particular in the context of chemical biology and drug development. Here, we report the first investigation of...

Method for organic fluorine determination in gasoline and its components using high-resolution continuum source flame molecular absorption spectrometry with gallium fluoride as a target molecule.

MethodsX

Kowalewska Z, Brzezińska K, Zieliński J, Pilarczyk J.
PMID: 34754826
MethodsX. 2021 Oct 29;8:101564. doi: 10.1016/j.mex.2021.101564. eCollection 2021.

Organic fluorides can arise due to the usage of HF in technologies of gasoline production, therefore, it is necessary to identify contamination of gasoline or its components with organic fluorine. For this aim, simple and fast method is proposed....

A Critical Appraisal of the Use and Properties of Nickel-Titanium Dental Alloys.

Materials (Basel, Switzerland)

Močnik P, Kosec T.
PMID: 34947453
Materials (Basel). 2021 Dec 18;14(24). doi: 10.3390/ma14247859.

Nickel-titanium (NiTi) archwires are used in dentistry for orthodontic treatment. NiTi alloys have favourable mechanical characteristics, such as superelasticity and shape memory, and are also known as a corrosion-resistant alloy. In specific cases, an archwire could be attacked by...

Redox-Neutral Organometallic Elementary Steps at Bismuth: Catalytic Synthesis of Aryl Sulfonyl Fluorides.

Journal of the American Chemical Society

Magre M, Cornella J.
PMID: 34914387
J Am Chem Soc. 2021 Dec 29;143(51):21497-21502. doi: 10.1021/jacs.1c11463. Epub 2021 Dec 16.

A Bi-catalyzed synthesis of sulfonyl fluorides from the corresponding (hetero)aryl boronic acids is presented. We demonstrate that the organobismuth(III) catalysts bearing a bis-aryl sulfone ligand backbone revolve through different canonical organometallic steps within the catalytic cycle without modifying the...

Stable copernicium hexafluoride (CnF.

Physical chemistry chemical physics : PCCP

Hu SX, Zou W.
PMID: 34889909
Phys Chem Chem Phys. 2021 Dec 10; doi: 10.1039/d1cp04360a. Epub 2021 Dec 10.

As the heaviest group 12 element known currently, copernicium (Cn) often presents the oxidation states of I+, II+, and rarely IV+ as in its homologue mercury. In this work we systematically studied the stability of some oxides, fluorides, and...

Determination of trace fluoride in water samples by silylation and gas chromatography/mass spectrometry analysis.

Rapid communications in mass spectrometry : RCM

Du J, Sheng C, Wang Y, Zhang H, Jiang K.
PMID: 33759246
Rapid Commun Mass Spectrom. 2021 Jun 15;35(11):e9089. doi: 10.1002/rcm.9089.

RATIONALE: Due to the ubiquity of fluorides and the small gap between a safe dose and a harmful one, it is necessary to develop a robust analytical method for determination of fluoride ions in various water samples with complex...

Showing 1069 to 1080 of 1102 entries