Showing 1-30 of 31 results for "252964"
Lars Riis Damgaard et al.
Analytica chimica acta, 1101, 135-140 (2020-02-08)
Nitrous oxide is an important greenhouse gas and there is a need for sensitive techniques to study its distribution in the environment at concentrations near equilibrium with the atmosphere (9.6 nM in water at 20 °C). Here we present an electrochemical sensor...
Taehyung Kim et al.
Nature, 586(7829), 385-389 (2020-10-16)
The visualization of accurate colour information using quantum dots has been explored for decades, and commercial products employing environmentally friendly materials are currently available as backlights1. However, next-generation electroluminescent displays based on quantum dots require the development of an efficient...
Maria V Zakharova et al.
ACS applied materials & interfaces, 10(15), 13199-13210 (2018-03-10)
Conventional amines and phosphines, such as diethylenetriamine, diphenylpropylphosphine, triethylamine, and tetramethylpiperidine, were grafted or impregnated on the surface of metalated SBA-15 materials, such as Ti-, Al-, and Zr-SBA-15, to generate air-stable solid-supported Lewis acid-base pairs. The Lewis acidity of the...
Haipeng Lu et al.
Journal of the American Chemical Society, 140(42), 13753-13763 (2018-09-27)
We developed a postsynthetic treatment to produce impurity n-type doped PbSe QDs with In3+ as the substitutional dopant. Increasing the incorporated In content is accompanied by a gradual bleaching of the interband first-exciton transition and concurrently the appearance of a...
Víctor Varela-Izquierdo et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 25(69), 15915-15928 (2019-10-05)
The feasibility of oxidative addition of the P-H bond of PHPh2 to a series of rhodium complexes to give mononuclear hydrido-phosphanido complexes has been analyzed. Three main scenarios have been found depending on the nature of the L ligand added...
Yuanzhou He et al.
Chemico-biological interactions, 317, 108942-108942 (2020-01-14)
Pulmonary hypertension (PH) is distal pulmonary arterial remodelling and is mainly due to the abnormal proliferation and apoptosis resistance of pulmonary artery smooth muscle cells (PASMCs). Apigenin, a natural dietary flavonoid, is a promising PH preventive agent that inhibits PASMC...
Jin Ryeol An et al.
Toxicological sciences : an official journal of the Society of Toxicology, 178(2), 302-310 (2020-10-04)
Imipramine, a tricyclic antidepressant, is used in the treatment of depressive disorders. However, the effect of imipramine on vascular ion channels is unclear. Therefore, using a patch-clamp technique we examined the effect of imipramine on voltage-dependent K+ (Kv) channels in...
Urszula K Komarnicka et al.
Journal of inorganic biochemistry, 165, 25-35 (2016-10-21)
In this paper we present lomefloxacin's (HLm, 2nd generation fluoroquinolone antibiotic agent) organic and inorganic derivatives: aminomethyl(diphenyl)phosphine (PLm), its oxide as well as new copper(I) iodide or copper(I) thiocyanate complexes with PLm and 2,9-dimethyl-1,10-phenanthroline (dmp) or 2,2'-biquinoline (bq) as the...
Eric P Gillis et al.
Journal of medicinal chemistry, 58(21), 8315-8359 (2015-07-23)
The role of fluorine in drug design and development is expanding rapidly as we learn more about the unique properties associated with this unusual element and how to deploy it with greater sophistication. The judicious introduction of fluorine into a...
Sean E Doris et al.
Journal of the American Chemical Society, 136(44), 15702-15710 (2014-10-11)
Cationic naked nanocrystals (NCs) are useful building units for assembling hierarchical mesostructured materials. Until now, their preparation required strongly electrophilic reagents that irreversibly sever bonds between native organic ligands and the NC surface. Colloidal instabilities can occur during ligand stripping...
Yu Wang et al.
Science advances, 5(6), eaaw5623-eaaw5623 (2019-06-13)
The behavior of individual nanocrystals during superlattice phase transitions can profoundly affect the structural perfection and electronic properties of the resulting superlattices. However, details of nanocrystal morphological changes during superlattice phase transitions are largely unknown due to the lack of...
Isaiah Y Chen et al.
ACS nano, 14(9), 11431-11441 (2020-08-18)
The formation of defect-free two-dimensional nanocrystal (NC) superstructures remains a challenge as persistent defects hinder charge delocalization and related device performance. Understanding defect formation is an important step toward developing strategies to mitigate their formation. However, specific mechanisms of defect...
Johannes Schmid et al.
Journal of the American Heart Association, 7(7) (2018-03-27)
Multiple studies have shown that an NO-induced activation of vascular smooth muscle BK channels contributes to the NO-evoked dilation in many blood vessels. In vivo, NO is released continuously. NO attenuates vessel constrictions and, therefore, exerts an anticontractile effect. It...
Hyunjin Cho et al.
Small (Weinheim an der Bergstrasse, Germany), 16(40), e2002109-e2002109 (2020-09-16)
Environmentally friendly ZnSe/ZnS core/shell quantum dots (QDs) as an alternative blue emission material to Cd-based QDs have shown great potential for use in next-generation displays. However, it remains still challenging to realize a high-efficiency quantum dot light-emitting diode (QLED) based...
Alex Abelson et al.
Nature materials, 19(1), 49-55 (2019-10-16)
Epitaxially fused colloidal quantum dot (QD) superlattices (epi-SLs) may enable a new class of semiconductors that combine the size-tunable photophysics of QDs with bulk-like electronic performance, but progress is hindered by a poor understanding of epi-SL formation and surface chemistry....
David Schneider et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 23(50), 12243-12252 (2017-03-24)
A series of heteroleptic tris(cyclopentadienyl) Ce
Brumwell, J. E.; Simpkins, N. S. et al.
Tetrahedron Letters, 34, 1215-1215 (1993)
Schow, S. R.; Bloom, J. D. et al.
Journal of the American Chemical Society, 108, 2662-2662 (1986)
Hyeong Jin Yun et al.
Nature communications, 11(1), 5280-5280 (2020-10-21)
The emerging technology of colloidal quantum dot electronics provides an opportunity for combining the advantages of well-understood inorganic semiconductors with the chemical processability of molecular systems. So far, most research on quantum dot electronic devices has focused on materials based...
Kui Yu et al.
Nature communications, 7, 12223-12223 (2016-08-18)
Little is known about the molecular pathway to monomers of semiconductor nanocrystals. Here we report a general reaction pathway, which is based on hydrogen-mediated ligand loss for the precursor conversion to 'monomers' at low temperature before nucleation. We apply (31)P...
Nicholas C Anderson et al.
Journal of the American Chemical Society, 140(23), 7199-7205 (2018-05-11)
Using 31P nuclear magnetic resonance (NMR) spectroscopy, we monitor the competition between tri- n-butylphosphine (Bu3P) and various amine and phosphine ligands for the surface of chloride terminated CdSe nanocrystals. Distinct 31P NMR signals for free and bound phosphine ligands allow...
Yuichi Kitagawa et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 27(1), 264-269 (2020-07-04)
A design for an effective molecular luminescent thermometer based on long-range electronic coupling in lanthanide coordination polymers is proposed. The coordination polymers are composed of lanthanide ions EuIII and GdIII , three anionic ligands (hexafluoroacetylacetonate), and a chrysene-based phosphine oxide...
Christina Zovko et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 26(58), 13191-13202 (2020-04-15)
A bis(diphenyl)-phosphine functionalized β-diketimine (PNac-H) was synthesized as a flexible ligand for transition metal complexes. The newly designed ligand features symmetrically placed phosphine moieties around a β-diketimine unit, forming a PNNP-type pocket. Due to the hard and soft donor atoms...
Posner, G. H.; Nelson, T. D.
The Journal of Organic Chemistry, 56, 4339-4339 (1991)
Reyhaneh Toufanian et al.
Frontiers in chemistry, 6, 567-567 (2018-12-06)
The large bulk bandgap (1.35 eV) and Bohr radius (~10 nm) of InP semiconductor nanocrystals provides bandgap tunability over a wide spectral range, providing superior color tuning compared to that of CdSe quantum dots. In this paper, the dependence of...
Botao Ji et al.
Nature communications, 10(1), 2-2 (2019-01-04)
Semiconductor heterostructure nanocrystals, especially with core/shell architectures, are important for numerous applications. Here we show that by decreasing the shell growth rate the morphology of ZnS shells on ZnSe quantum rods can be tuned from flat to islands-like, which decreases...
Glenn W Guglietta et al.
ACS nano, 9(2), 1820-1828 (2015-02-04)
Colloidal semiconductor nanocrystals have been used as building blocks for electronic and optoelectronic devices ranging from field-effect transistors to solar cells. Properties of the nanocrystal films depend sensitively on the choice of capping ligand to replace the insulating synthesis ligands....
David Labrousse-Arias et al.
Cardiovascular research, 109(1), 115-130 (2015-10-28)
Hypoxic conditions stimulate pulmonary vasoconstriction and vascular remodelling, both pathognomonic changes in pulmonary arterial hypertension (PAH). The secreted protein thrombospondin-1 (TSP1) is involved in the maintenance of lung homeostasis. New work identified a role for TSP1 in promoting PAH. Nonetheless...
Joonhyuck Park et al.
ACS nano, 14(9), 11579-11593 (2020-08-14)
A heat-up method for quantum dots (QDs) synthesis holds distinctive benefits for large-scale production with its simplicity, scalability, and high reproducibility. Its applications, however, have been limited because it inevitably yields a strong overlap between the nucleation and the growth...
Yuichi Kitagawa et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 27(7), 2279-2283 (2020-10-24)
A tribo-excited chemical reaction using a stacked lanthanide coordination polymer is demonstrated for the first time. The polymer is composed of a EuIII ion, hexafluoroacetylacetonato ligands, and an anthracene-based phosphine oxide bridge. The tightly stacked structure with hydrogen bonding was...

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