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3 article(s) from Pinteala, Mariana

A study on electrospray mass spectrometry of fullerenol C₆₀(OH)₂₄

Mihaela Silion,
Andrei Dascalu,
Mariana Pinteala,
Bogdan C. Simionescu and
Cezar Ungurenasu

Beilstein J. Org. Chem. 2013, 9, 1285–1295, doi:10.3762/bjoc.9.145

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Scheme 1: Proposed mechanisms for the formation of fullerenol anions and distonic radical anions observed by ...

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Figure 1: Negative-ion mass spectra for a 0.5 × 10⁻⁵ M solution of C₆₀(OH)₂₄ in ultrapure water: (a) full sca...

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Scheme 2: Examples of proposed structures for the main deprotonated molecules and final distonic molecular io...

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Scheme 3: Proposed (−)ESI-MS ionization mechanisms for fullerenol C₆₀(OH)₂₄ in pure water.

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Figure 2: Negative-ion mass spectra of a 0.5 × 10⁻⁵ M aqueous solution of C₆₀(OH)₂₄ in ammonia solution: (a) ...

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Figure 3: Positive ionization ESI mass spectrum of C₆₀(OH)₂₄ in (a) 3 × 10⁻¹ M (b) 2 × 10⁻² M aqueous ammonia...

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Scheme 4: Proposed (+)ESI-MS ionization mechanisms for fullerenol C₆₀(OH)₂₄ in ammonia solution.

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Full Research Paper

Published 02 Jul 2013

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Theoretical study on β-cyclodextrin inclusion complexes with propiconazole and protonated propiconazole

Adrian Fifere,
Narcisa Marangoci,
Stelian Maier,
Adina Coroaba,
Dan Maftei and
Mariana Pinteala

Beilstein J. Org. Chem. 2012, 8, 2191–2201, doi:10.3762/bjoc.8.247

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Figure 1: Schematic representation of the β-cyclodextrin (a) and propiconazole (b) molecules.

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Figure 2: PM3 optimized molecular geometries of the β-CD/PP inclusion compounds involved in the assessment of...

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Figure 3: Molecular coordinates used to describe the relative position between the β-CD and guest molecules.

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Figure 4: Evolution of the stabilization energy during the movement along the z axis in the case of (a) A and...

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Figure 5: PM3 optimized molecular geometry of the β-CD/PP inclusion compounds in (a) A configuration and in (...

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Figure 6: AM1 optimized molecular geometry of the β-CD/PP inclusion compounds, for both (a) A and (b) B confi...

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Figure 7: Variation of the stabilization energy during the movement along the z axis, in the case of (a) A an...

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Figure 8: PM3 optimized molecular geometry of β-CD/PPH⁺ inclusion compounds in the (a) A and (b) B configurat...

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Figure 9: AM1 optimized molecular geometry of the inclusion compounds β-CD/PPH⁺ in the (a) A and (b) B config...

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Figure 10: MM+ optimized molecular geometry of the (a) β-CD/PP and (b) β-CD/PPH⁺ inclusion complexes, in both ...

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Full Research Paper

Published 17 Dec 2012

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Polysiloxane ionic liquids as good solvents for β-cyclodextrin-polydimethylsiloxane polyrotaxane structures

Narcisa Marangoci,
Rodinel Ardeleanu,
Laura Ursu,
Constanta Ibanescu,
Maricel Danu,
Mariana Pinteala and
Bogdan C. Simionescu

Beilstein J. Org. Chem. 2012, 8, 1610–1618, doi:10.3762/bjoc.8.184

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Scheme 1: Synthesis of PDMS-Im/Br ionic liquid.

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Figure 1: Appearance of (A) pure PDMS-Im/Br ionic liquid; (B) PDMS-Im/Br ionic liquid containing 1 wt % PRot.

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Figure 2: Wet-STEM images at 30 kV in bright field mode of: PDMS-Im/Br ionic liquid (A,B) and mixture of PDMS...

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Figure 3: Amplitude sweep results for PDMS-Im/Br and PDMS-Im/Br+PRot at 25 °C.

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Figure 4: Storage (G’) and loss (G”) moduli dependence on frequency for PDMS-Im/Br and PDMS-Im/Br+PRot at 25 ...

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Figure 5: Storage (G’) and loss (G”) moduli dependence on temperature for PDMS-Im/Br and PDMS-Im/Br+PRot.

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Figure 6: Flow curves for PDMS-Im/Br and PDMS-Im/Br + PRot at 25 °C.

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Figure 7: Temperature dependence of flow curves for PDMS-Im/Br ionic liquid.

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Figure 8: Temperature dependence of flow curves for PDMS-Im/Br+PRot.

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Figure 9: DSC second heating curves of: (1) PDMS-Im/Br ionic liquid, (2) mixture of PDMS-Im/Br with Prot and ...

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Full Research Paper

Published 24 Sep 2012

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A study on electrospray mass spectrometry of fullerenol C60(OH)24

Theoretical study on β-cyclodextrin inclusion complexes with propiconazole and protonated propiconazole

Polysiloxane ionic liquids as good solvents for β-cyclodextrin-polydimethylsiloxane polyrotaxane structures

A study on electrospray mass spectrometry of fullerenol C₆₀(OH)₂₄