Materials Literature
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We show that reductive methylation of proteins can be used for highly sensitive NMR identification of conformational changes induced by metal- and small molecule binding, as well as protein-protein interactions. Reductive methylation of proteins introduces two (13)C-methyl groups on each lysine in the protein of inter…
Free-standing epitaxially grown nanowires provide a controlled growth system and an optimal interface to the underlying substrate for advanced optical, electrical, and mechanical nanowire device connections. Nanowires can be grown by vapor-phase epitaxy (VPE) methods such as chemical vapor deposition (CVD) or metal or…
Conjugated polydiacetylene (PDA) possessing stimuli-responsive properties has been intensively investigated for developing efficient sensors. We report here fluorescence resonance energy transfer (FRET) in liposomes synthesized using different molar ratios of dansyl-tagged diacetylene and diacetylene-carboxylic acid m…
Poly(3-hexylthiophene) is reacted with the methylating agent dimethylsulfate. This increases the hole mobility, almost doubles the exciton diffusion length, and substantially enhances the photochemical stability of the polymer in air. The reaction may involve neutralization of anionic defects via addition of a methyl…
Abstract Experiments were conducted to evaluate the influence of ambient photoconversion on rheology for a range of photopolymerizable urethane dimethacrylate (UDMA) resins containing varying amounts of three comonomers including 1,6 hexane diol‐dimethacrylate (HDDMA), an alkoxylated cyclohexane dimethanol diacrylate…
We report a multinuclear solid-state ( (23)Na, (39)K, (87)Rb, (133)Cs) NMR study of tetraphenylborate salts, M[BPh 4] (M = Na, K, Rb, Cs). These compounds are isostructural in the solid state with the alkali metal ion surrounded by four phenyl groups resulting in strong cation-pi interactions. From analyses of solid-s…
Numerous reconstructive procedures result in wounds that require skin grafting. Often, the amount of tissue available from donor sites is limited. In vivo tissue expanders have been used clinically to generate larger sections of skin, and other methods exist to cover large wounds, but all have significant limitations.…
Herein it is demonstrated that electrohydrodynamic co-jetting is not limited to Janus-type particles, but can also be used for the preparation of core/shell particles. Using side-by-side flow of miscible polymer solutions, electrohydrodynamic co-jetting offers an elegant and scalable route towards preparation of core/…
The effect of position and degree of sulfur oxidation on the fundamental properties of a series of planarized thieno[3,2-b]thiophene S,S-dioxides derivatives was studied. The optical data reveal a red shift in the longest wavelength of absorption relative to the nonoxidized analogues that is indicative of a reduced HO…
Abstract A set of rigid π‐conjugated bis(terpyridine) macroligands with poly(ε‐caprolactone) (pCL) on their side chains was synthesized and investigated. The introduced pCL chains gave rise to enhanced processability and film‐forming properties of the materials. Blue photoluminescence with high quantum yields was obse…
Polymer solar cells have been characterized during and after x-ray irradiation. The open circuit voltage, dark current and power conversion efficiency show degradation consistent with the generation of defect states in the polymer semiconductor. The polymer solar cell device remained functional with exposure to a cons…
Synthesis, structure, and reactivity of two families of rare-earth metal complexes containing discrete methyl cations [LnMe(2-x)(thf)n]((1+x)+) (x = 0, 1; thf = tetrahydrofuran) have been studied. As a synthetic equivalent for the elusive trimethyl complex [LnMe3], lithium methylates of the approximate composition [Li…
Polarization-dependent resonant inelastic x-ray scattering (RIXS) is shown to be a new probe of molecular-field effects on the electronic structure of isolated molecules. A combined experimental and theoretical analysis explains the linear dichroism observed in Cl 2p RIXS following Cl 1s excitation in HCl and CF3Cl as…
Arm-growth initiation in six-armed Z-RAFT star polymerization of styrene-d8 was followed via the disappearance of 1H NMR signals of the leaving group at their original position. These measurements revealed a dramatic impact of the leaving group on star polymer topology. Phenylethyl as leaving group induced formation o…
Molecular dynamics simulations are performed to study the translocation of a DNA oligonucleotide in a carbon nanotube (CNT) channel consisting of CNTs of two different diameters. A strong gravitational acceleration field is applied to the DNA molecule and water solvent as an external driving force for the translocatio…
We used a cross capacitor to measure the relative dielectric permittivity ${\ensuremath{\epsilon}}_{r}$ of ${\mathrm{O}}_{2}$ at 273, 293, and $323\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ and at pressures up to $6.5\phantom{\rule{0.3em}{0ex}}\mathrm{MPa}$. Simultaneously we measured oxygen's complex refractive index $n$…
Novel low optical gap, p-type semiconducting oligothiophenes asymmetrically end-capped with triarylamino and tricyanovinyl groups, PhN-OFOT( n )-TCN ( n = 2, 3), have been synthesized and characterized for photovoltaic applications. With an incorporation of a tricyanovinyl accepting group to the triarylamine, the opti…
The Raman spectra of tetragonal TbPO4 (zircon-type I4 1/amd structure, D4h19 space group) have been measured at ambient conditions and under variable pressure up to 15.5GPa inside a diamond anvil cell (DAC). Assignment of the Raman active modes of the tetragonal phase has been carried out based on polarized measuremen…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTVisible and Near-Infrared Absorbing, Low Band Gap Conjugated Oligomers Based on CyclopentadieneonesWesley Walker†, Brittnee Veldman‡, Ryan Chiechi†§, Satish Patil†∥, Michael Bendikov⊥, and Fred Wudl*†‡View Author Information Departm…
Abstract Bis( m ‐aminophenyl)methylphosphine oxide based benzoxazine (Bz‐BAMPO) was obtained using a three‐step synthetic method from the aromatic diamine and 2‐hydroxybenzaldehyde as starting materials. The structure and purity of the monomer was confirmed by elemental analysis, FTIR, 1 H NMR, 13 C NMR and 31 P NMR s…