Experimental and Theoretical Comparison of Potential-dependent Methylation on Chemically Exfoliated WS and MoS.

Reductant-activated functionalization is shown to enhance the methylation of chemically exfoliated MoS (MoS) and WS by introducing excess negative charge to facilitate a nucleophilic attack reaction. Relative to methylation in the absence of a reductant, the reaction produces a twofold increase in coverage of WS, from 25 to 52% coverage per WS. However, at every potential, the methyl coverage on WS was ∼20% lower than that on MoS.

Giant Enhancement of Photoluminescence Emission in WS-Two-Dimensional Perovskite Heterostructures.

Transition metal dichalcogenides (TMDCs) and two-dimensional organic and inorganic hybrid lead halide perovskites (2DPVSKs) have emerged as highly promising materials for ultralight and ultrathin optoelectronics application. They both exhibit tunability of electronic properties such as band structure, and they can form heterostructures with various types of two-dimensional materials for novel physical properties not observed in single components. However, TMDCs exhibit poor emission efficiency due to defect states and direct-to-indirect interband transition, and 2DPVSKs suffer from poor stability in ambient atmosphere.

Long-term Patterns of Patient Portal Use for Pediatric Patients at an Academic Medical Center.

Background: Patient portal adoption has increased over the last two decades. Most research about patient portals has focused on adult populations in the primary care and medical specialty settings.

Objective: We describe initial and long-term portal use by pediatric patients and their caregivers in a broadly deployed patient portal at an academic medical center.

Insertion of CO2 into the carbon-boron bond of a boronic ester ligand.

New Ru and Zn diazafluorenyl complexes undergo C-H borylation of the diazafluorenyl ligand to form the corresponding diazafluorenylboronic ester complexes, which can insert CO2 into their C-B bonds to form boryl ester functionalities. The relevance of these new reactivities towards catalytic CO2 reduction has also been explored.

Role of aggregation in the synthesis and polymerization activity of SalBinap indium alkoxide complexes.

The reaction of racemic SalBinap ligand, (±)-H2(ONN*OMe), with InCl3 and excess NaOEt generated a mixture of two dinuclear compounds [(μ-κ(2)-ONN*OMe)In(μ-OEt)]2 (1a) and [κ(4)-ONN*OMe)In(μ-OEt)]2 (1b), which were isolated and fully characterized. Polymerization of racemic lactide with 1a and 1b was slow in refluxing THF and showed only modest stereoselectivity. Catalyst 1b displayed better control than 1a, with the experimental molecular weights of the resulting poly(lactic acid) in agreement with the expected values.

Reduced release of nitric oxide to shear stress in mesenteric arteries of aged rats.

We hypothesized that aging is characterized by a reduced release of nitric oxide (NO) in response to shear stress in resistance vessels. Mesenteric arterioles and arteries of young (6 mo) and aged (24 mo) male Fischer 344 rats were isolated and cannulated. Shear stress (15 dyn/cm(2))-induced dilation was significantly reduced and shear stress (1, 5, 10, and 15 dyn/cm(2))-induced increases in perfusate nitrite were significantly smaller at all shear stress levels in vessels of aged rats.