Browsing Department of Chemistry Faculty Publications by Title
Now showing items 18-37 of 90
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Dearomatizing and Derivatizing a Mesityl Group on Boron by One‐Pot Photoisomerization and [4+2] Diels–Alder Addition
(Wiley, 2019)Boron compounds having a conjugated chelate backbone (N,C‐chelate or C,C‐chelate) and two mesityl substituents on boron have been found to undergo a facile one‐pot transformation/reaction with dienophiles, which leads to ... -
Detection Limits of Chemical Sensors: Applications and Misapplications
(2016-03-08)The limit of detection (LOD) and the sensitivity of a chemical sensor are defined using IUPAC guidelines. The LOD from simulated and experimental data is calculated from a calibration curve using a simple statistical model ... -
Detection of Lead Contamination of Water and VOC Contamination of Air Using SOI Micro-Optical Devices
(2016-03-17)Micro-photonic SOI Mach-Zehnder interferometers were coated with solid-phase micro-extraction materials derived from polydimethylsiloxane to enable sensing of volatile organic compounds of the BTEX class in air. A different ... -
Direct Sensing in Liquids Using Whispering-Gallery-Mode Droplet Resonators
(2016-03-03)Liquid droplets suspended by the tip of a thin wire, a glass capillary, or a needle form high-Q optical resonators, thanks to surface tension. Under gravity equilibrium conditions, the maximum drop diameter is approximately ... -
Efficiency enhancement of ternary blend organic photovoltaic cells with molecular glasses as guest acceptors
(Organic Electronics, 2017-11-06)Previously reported glass-forming perylenediimide (PDI-glass) and diketopyrrolopyrrole (DPP-glass) acceptors were used as ternary components to modulate the morphology and electron transport properties of bulk heterojunctions ... -
Electric Field-Induced Nano-Scale Surface Patterning in Mexylaminotriazine-Functionalized Molecular Glass Derivatives
(American Chemical Society, 2016-05-17)Nanoscale surface patterns were observed in thin films of mexylaminotriazine-functionalized glasses containing polar groups upon the application of an electric field at temperatures over their glass transition temperatures ... -
Electrochemistry, Electrocatalysis and Materials Science of Bulk Pt and Nanoscopic Pt, PtNi, PtCo, and Ni(OH)2 Materials: Preparation, Characterization, Catalytic Activity and Corrosion Behaviour
Research on the degradation of platinum (Pt) and nickel (Ni) materials is of high importance to the fuel cell and electrolyser technologies, because their degradation translates into irreversible materials loss and ... -
Enantioselective Rhodium-Catalyzed Allylic Alkylation of β,γ-Unsaturated α-Amino Nitriles: Synthetic Homoenolate Equivalents
(2019-04-07)An enantioselective rhodium-catalyzed allylic alkylation of β,γ-unsaturated α-amino nitriles is described. This protocol provides a novel approach for the construction of β-stereogenic carbonyl derivatives via the catalytic ... -
Enhanced Nanoparticle Detection with Liquid Droplet Resonators
(2016-02-25)Whispering gallery mode particle sensing experiments are commonly performed with solid resonators, whereby the sensing volume is limited to the weak evanescent tail of the mode near the resonator surface. In this work we ... -
Expedient Pd‐Catalyzed α‐Arylation towards Dibenzoxepinones. Pivotal Manske's Ketone for the Formal Synthesis of Cularine Alkaloids
(Wiley, 2020-04-03)The general synthesis of diversely substituted dibenzoxepinones by a combined Pd‐catalyzed α‐arylation and SNAr strategy is reported and applied to the synthesis of Manske's ketone, a key intermediate en route to the total ... -
Fabrication and Modeling of Multimode Fiber Lenses
(2016-03-07)We report on the fabrication, modeling, and experimental verification of the emission of fiber lenses fabricated on multimode fibers in different media. Concave fiber lenses with a radius of 150 μm were fabricated onto a ... -
A Fabry-Perot Refractometer for Chemical Vapor Sensing by Solid-Phase Microextraction
(2016-03-14)The contour lithography method [1] is used to improve the fabrication yield of previously demonstrated [2] microfluidic Fabry-Perot (FP) refractive index (RI) sensors. The sensors are then coated with polydimethylsiloxane ... -
Fac vs Mer Selection in Octahedral Complexes of the N‑Benzyl- Substituted Triazolylpyridine Diad with Labile Metal Ions (Zinc(II), Iron(II), and Nickel(II))
(American Chemical Society, 2018-02-08)Pseudo-octahedral complexes built on chelating ligands offer valuable isomeric properties such as the formation of fac vs mer isomers, and lambda vs delta enantiomers. This article discusses factors guiding the fac vs mer ... -
Fiber-Optic Ring-Down Spectroscopy Using a Tunable Picosecond Gain-Switched Diode Laser
(2016-03-23)Visible and near-infrared laser light pulses were coupled into two different types of optical fiber cavities. One cavity consisted of a short strand of fiber waveguide that contained two identical fiber Bragg gratings. ... -
Flow Injection Single Particle Inductively Coupled Plasma Mass Spectrometry: An Original Simple Approach for the Characterization of Metal-Based Nanoparticles
(American Chemical Society, 2016-09-29)In recent years, single-particle inductively coupled plasma mass spectrometry (spICPMS) has emerged as a reliable tool that can both count metal-containing nanoparticles and measure their mass, thereby allowing sizing if ... -
Fluorescence Excitation–Emission Matrix (EEM) Spectroscopy and Cavity Ring-Down (CRD) Absorption Spectroscopy of Oil-Contaminated Jet Fuel Using Fiber-Optic Probes
(2016-03-11)Excitation emission matrix (EEM) and cavity ring-down (CRD) spectral signatures have been used to detect and quantitatively assess contamination of jet fuels with aero-turbine lubricating oil. The EEM spectrometer has been ... -
Full-Dimensional Calculations of Rovibrational Levels of Five-Atom Molecules Using Two Different Strategies: Applications to CH4, CHD3, CH3D and CH3F
(2018)Quantum mechanical calculations of ro-vibrational energies of CH4, CHD3, CH3D, and CH3F were made with two different numerical approaches. Both use polyspherical coordinates. The computed energy levels agree, confirming the ... -
Gas Sensing Using Polymer-Functionalized Deformable Fabry–Perot Interferometers
(2016-03-03)We report a chemical vapor sensor in which polymer swelling, upon analyte absorption, is used to deform an on-chip silicon Fabry–Perot interferometer (FPI). The magnitude of the deformation, recorded through the resonance ... -
The He2 - OCS Complex: Comparison Between Theory and Experiment
(2017-10-31)OCS is an ideal probe for quantum solvation effects in cold helium clusters. He2-OCS is the “second step” in going from a single OCS molecule to a large doped superfluid helium cluster. Here assignment of the spectrum of ... -
An Improved Route for the Synthesis of Guanine Quadruplex Ligand
(Thieme Stuttgart-New York, 2018-04-24)The recognition of non-canonical DNA and RNA architectures such as guanine quadruplexes by small molecule ligands has become a promising strategy for anticancer and antiviral applications in recent years, leading to an ...