A5006329614- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Perovskite Materials and Applications
- Electrocatalysts for Energy Conversion
- CO2 Reduction Techniques and Catalysts
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Electrochemical Analysis and Applications
- Luminescence and Fluorescent Materials
- Synthesis and Properties of Aromatic Compounds
- Nanowire Synthesis and Applications
- Porphyrin and Phthalocyanine Chemistry
- Organic Light-Emitting Diodes Research
- Polydiacetylene-based materials and applications
- Anodic Oxide Films and Nanostructures
- Electrospun Nanofibers in Biomedical Applications
- Graphene and Nanomaterials Applications
- Semiconductor materials and interfaces
- Ionic liquids properties and applications
Harvard University
2017-2021
University of Southern Mississippi
2015-2019
Hattiesburg Clinic
2017
University of California, Berkeley
2015
Lawrence Berkeley National Laboratory
2015
Berkeley College
2015
Sandia National Laboratories California
2014
A novel electron acceptor was synthesized from one-step functionalization of the readily available indigo dye. The resulting bay-annulated (BAI) utilized for preparation a series donor–acceptor small molecules and polymers. As revealed experimentally by theoretical calculations, substituted BAIs have stronger accepting characteristics when compared to several premier deficient building blocks. result, materials incorporating BAI possess low-lying LUMO energy levels HOMO–LUMO gaps. In situ...
Gold electrocatalysts have been a research focus due to their ability reduce CO2 into CO, feedstock for further conversion. Many methods employed modulate reduction (CDR) vs hydrogen evolution reaction (HER) selectivity on gold electrodes such as nano-/mesostructuring and crystal faceting control. Herein we show that surfaces with very different morphologies (planar, leaves, wires) lead similar bell-shaped CO faradaic efficiency function of applied potential. At low overpotential (E > −0.85...
A conjugated polymer semiconductor was synthesized, which exhibits a high-spin ground state and robust stability.
NIR-SWIR photoresponsive donor–acceptor polymers enable the detection of infrared light when incorporated into bulk heterojunction photodiodes.
Combining core annulation and peripheral group modification, we have demonstrated a divergent synthesis of family highly functionalized coronene derivatives from readily accessible dichlorodiazaperylene intermediate. Various reactions, such as aromatic nucleophilic substitution, Kumada coupling Suzuki proceed effectively on α-positions the pyridine sites, giving rise to alkoxy, thioalkyl, alkyl or aryl substituted polycyclic hydrocarbons. In addition modulation, structures can be altered by...
Development of new synthetic methods for the modification nanostructures has accelerated materials design advances to furnish complex architectures. Structures based on one-dimensional (1D) silicon (Si) structures synthesized using top-down and bottom-up are especially prominent diverse applications in chemistry, physics, medicine. Yet further elaboration these with distinct metal-based polymeric materials, which could open up opportunities, been difficult. We present a general...
Bridgehead imine‐substituted cyclopentadithiophene structural units, in combination with highly electronegative acceptors that exhibit progressively delocalized π‐systems, afford donor–acceptor (DA) conjugated polymers broad absorption profiles span technologically relevant wavelength (λ) ranges from 0.7 < λ 3.2 μm. A joint theoretical and experimental study demonstrates the presence of cross‐conjugated substituent at donor bridgehead position results capability to fine‐tune electronic...
Abstract Cascade electrochemical reduction of CO 2 has been investigated on nanostructured bimetallic gold‐copper and silver‐copper catalyst nanowire foam electrode arrays. The electrocatalysts allow for the overall carbon dioxide reaction (CO RR) to be performed, where conversion occurring at silver (Ag) or gold (Au) is decoupled from multicarbon species Cu. fabrication methods permit orientation controlled thus investigation order cascade process. Segmentation electrodes most versatile...
The kinetics of the inner-sphere electron transfer reaction between a gold electrode and CO2 was measured as function applied potential in an aqueous environment. Extraction rate constant requires deconvolution current associated with reduction from competing hydrogen evolution mass transport. Analysis reveals driving force dependence that has similar characteristics to Marcus–Hush–Levich outer-sphere model. Consideration simple assumptions for adsorption on surface allows evaluation...
As more research findings have shown the correlation between ordering in organic semiconductor thin films and device performance, it is becoming essential to exercise control of through structural tuning. Many recent studies focused on influence side chain engineering polymer packing orientation films. However, impact size conformation aromatic surfaces film has not been investigated great detail. Here we introduce a disk-shaped polycyclic hydrocarbon building block with large π surface,...
Conjugated organic molecules effectively produce and harvest visible light find utility in a variety of emergent optoelectronic technologies. There is currently interest expanding the scope these materials to extend functionality into infrared (IR) spectral regions endow relevant Developing an understanding interplay between chemical electronic structure systems will require control frontier orbital energetics (separation, position, alignment), ground state configurations, <i>inter</i>chain...
Front Cover: Bridgehead imine-substituted cyclopentadithiophene structural units, in combination with strong acceptors progressively delocalized π-systems, afford modular donor-acceptor copolymers broad and long wavelength light absorption the infrared. These solution-processable materials possess some of narrowest bandgaps reported to date elucidate important aspects role chemical structure controlling primary photoexcitations conjugated copolymer systems. Further details can be found...