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Showing 13 to 24 of 18259 entries
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Towards new molecular photocatalysts for CO2 reduction: photo-induced electron transfer versus CO dissociation within [Os(NN)(CO)2Cl2] Complexes.

Chemistry (Weinheim an der Bergstrasse, Germany)

Chauvin J, Lafolet F, Chardon-Noblat S, Deronzier A, Jakonen M, Haukka M.
PMID: 21374746
Chemistry. 2011 Apr 04;17(15):4313-22. doi: 10.1002/chem.201003098. Epub 2011 Mar 04.

Optical excitation in the visible region of trans-(Cl)-[Os(bpy)(CO)(2)Cl(2)] (bpy=2,2'-bipyridine; C1) and trans-(Cl)-[Os(dmbpy)(CO)(2)Cl(2)] (dmbpy=4,4'-dimethyl 2,2'-bipyridine; C2) is known to induce the common CO dissociation reaction. However, the quantum yield of the reactions is less than 0.15, although C1 and C2...

Conformational Sampling by Ab Initio Molecular Dynamics Simulations Improves NMR Chemical Shift Predictions.

Journal of chemical theory and computation

Dračínský M, Möller HM, Exner TE.
PMID: 26584127
J Chem Theory Comput. 2013 Aug 13;9(8):3806-15. doi: 10.1021/ct400282h. Epub 2013 Jul 02.

Car-Parrinello molecular dynamics simulations were performed for N-methyl acetamide as a small test system for amide groups in protein backbones, and NMR chemical shifts were calculated based on the generated ensemble. If conformational sampling and explicit solvent molecules are...

Solvent-type-dependent polymorphism and charge transport in a long fused-ring organic semiconductor.

Nanoscale

Chen J, Shao M, Xiao K, Rondinone AJ, Loo YL, Kent PR, Sumpter BG, Li D, Keum JK, Diemer PJ, Anthony JE, Jurchescu OD, Huang J.
PMID: 24217182
Nanoscale. 2014 Jan 07;6(1):449-56. doi: 10.1039/c3nr04341j. Epub 2013 Nov 11.

Crystalline polymorphism of organic semiconductors is among the critical factors in determining the structure and properties of the resultant organic electronic devices. Herein we report for the first time a solvent-type-dependent polymorphism of a long fused-ring organic semiconductor and...

Atomistic description of thiostannate-capped CdSe nanocrystals: retention of four-coordinate SnS4 motif and preservation of Cd-rich stoichiometry.

Journal of the American Chemical Society

Protesescu L, Nachtegaal M, Voznyy O, Borovinskaya O, Rossini AJ, Emsley L, Copéret C, Günther D, Sargent EH, Kovalenko MV.
PMID: 25597625
J Am Chem Soc. 2015 Feb 11;137(5):1862-74. doi: 10.1021/ja510862c. Epub 2015 Jan 29.

Colloidal semiconductor nanocrystals (NCs) are widely studied as building blocks for novel solid-state materials. Inorganic surface functionalization, used to displace native organic capping ligands from NC surfaces, has been a major enabler of electronic solid-state devices based on colloidal...

Separation of intra- and intermolecular contributions to the PELDOR signal.

Journal of magnetic resonance (San Diego, Calif. : 1997)

Schöps P, Plackmeyer J, Marko A.
PMID: 27243966
J Magn Reson. 2016 Aug;269:70-77. doi: 10.1016/j.jmr.2016.05.012. Epub 2016 May 24.

Pulsed Electron-electron Double Resonance (PELDOR) is commonly used to measure distances between native paramagnetic centers or spin labels attached to complex biological macromolecules. In PELDOR the energies of electron magnetic dipolar interactions are measured by analyzing the oscillation frequencies...

One-step fabrication of highly stable, superhydrophobic composites from controllable and low-cost PMHS/TEOS sols for efficient oil cleanup.

Journal of colloid and interface science

Guo P, Zhai S, Xiao Z, An Q.
PMID: 25666456
J Colloid Interface Sci. 2015 May 15;446:155-62. doi: 10.1016/j.jcis.2015.01.062. Epub 2015 Jan 28.

Facing the issues of significant increase of industrial oily wastewater and frequent accident of oil spills, the developing of efficient and affordable absorbents for improving oil pollution is of practical significance. Herein, several superhydrophobic and superoleophilic materials, utilizing filter...

Volume increment effect on the photoisomerization of hemicyanine dyes in oligo(ethylene glycol)s.

The journal of physical chemistry. A

Lee Y, Lee M.
PMID: 24266422
J Phys Chem A. 2013 Dec 05;117(48):12878-83. doi: 10.1021/jp4101043. Epub 2013 Nov 25.

We studied the excited-state dynamics of three hemicyanine dyes that undergo internal twisting from the localized excited state to the twisted intramolecular charge-transfer state. The dyes differ in the length of the alkyl chain in the aniline moiety and,...

Flavonoid compositions and antioxidant activity of calamondin extracts prepared using different solvents.

Journal of food and drug analysis

Lou SN, Hsu YS, Ho CT.
PMID: 28911417
J Food Drug Anal. 2014 Sep;22(3):290-295. doi: 10.1016/j.jfda.2014.01.020. Epub 2014 Feb 15.

Calamondin has been demonstrated to exhibit antioxidant function and tyrosinase inhibitory activity, which might be attributed to its flavonoid compounds. To improve their application, the flavonoid compositions and antioxidant activity of calamondin extracts, prepared by different solvents, were investigated....

Dynamics of phytoestrogen, isoflavonoids, and its isolation from stems of Pueraria lobata (Willd.) Ohwi growing in Democratic People's Republic of Korea.

Journal of food and drug analysis

Mun SC, Mun GS.
PMID: 28911713
J Food Drug Anal. 2015 Sep;23(3):538-544. doi: 10.1016/j.jfda.2015.04.003. Epub 2015 May 18.

Four isoflavonoids were isolated from stems of Pueraria lobata (Willd.) Ohwi growing in Democratic People's Republic of Korea and identified as daidzein (1), genistin (2), daidzin (3), and puerarin (4), structures, which were elucidated by means of spectroscopic analysis....

Frequency-Dependent Solvent Impedance and Colloid Microelectrophoresis Measurements in Partially Polar Solvents.

Langmuir : the ACS journal of surfaces and colloids

Hayden E, Aljabal Z, Yethiraj A.
PMID: 28441871
Langmuir. 2017 May 16;33(19):4781-4788. doi: 10.1021/acs.langmuir.7b00816. Epub 2017 May 02.

We carry out frequency-dependent solvent impedance measurements and alternating current (ac) colloid microelectrophoresis experiments in partially polar solvents in the low-frequency regime (0.25 Hz ≤ f ≤ 10 Hz). Solvent electrode polarization effects are quantified first in partially polar...

COSMO-RSC: Second-Order Quasi-Chemical Theory Recovering Local Surface Correlation Effects.

The journal of physical chemistry. A

Klamt A.
PMID: 26963690
J Phys Chem A. 2016 Mar 31;120(12):2049-56. doi: 10.1021/acs.jpca.6b00757. Epub 2016 Mar 18.

The conductor-like screening model for realistic solvation (COSMO-RS) was introduced 20 years ago and meanwhile has become an important tool for the prediction of fluid phase equilibrium properties. Starting from quantum chemical information about the surface polarity of solutes...

Liquid permeation and chemical stability of anodic alumina membranes.

Beilstein journal of nanotechnology

Petukhov DI, Buldakov DA, Tishkin AA, Lukashin AV, Eliseev AA.
PMID: 28382245
Beilstein J Nanotechnol. 2017 Mar 06;8:561-570. doi: 10.3762/bjnano.8.60. eCollection 2017.

A study on the chemical stability of anodic alumina membranes and their performance in long-term water and organic solvent permeation experiments is reported. Anodic alumina possesses high stability for both protonic and aprotonic organic solvents. However, serious degradation of...

Showing 13 to 24 of 18259 entries