A5058438938- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Organic Electronics and Photovoltaics
- Synthesis and Properties of Aromatic Compounds
- Remote Sensing in Agriculture
- Leaf Properties and Growth Measurement
- Organic Light-Emitting Diodes Research
- Conducting polymers and applications
- Luminescence and Fluorescent Materials
- Porphyrin and Phthalocyanine Chemistry
- Photochemistry and Electron Transfer Studies
- Molecular Junctions and Nanostructures
- Synthesis and characterization of novel inorganic/organometallic compounds
- Quantum Dots Synthesis And Properties
- Remote Sensing and LiDAR Applications
- CO2 Reduction Techniques and Catalysts
- Remote Sensing and Land Use
- Crop Yield and Soil Fertility
- Spectroscopy and Chemometric Analyses
- Mechanical and Optical Resonators
- Perovskite Materials and Applications
- Soil Geostatistics and Mapping
- Thin-Film Transistor Technologies
- Advanced Chemical Physics Studies
- Organic Chemistry Cycloaddition Reactions
Northumbria University
2023-2024
Centre for Process Innovation
2013-2014
Durham University
2003-2012
Institut des Sciences Chimiques de Rennes
2007
A polytriarylamine-based oligomer is reported as a hole transporting material and its application in solid-state CH3NH3PbI3 based heterojunction solar cells described. It yields power conversion efficiency of 12.0% under 99.6 mW cm–2 illumination. In addition to suitable energy levels high mobility, the low preparation cost makes it promising candidate for photovoltaics. As service our authors readers, this journal provides supporting information supplied by authors. Such materials are peer...
The torsional motions of jet-cooled 1,4-bis(phenylethynyl)benzene (BPEB), a prototype molecular wire, were studied using cavity ring-down spectroscopy in the first UV absorption band (316-321 nm). spectrum 1,4-bis(phenylethynyl)-2,3,5,6-tetradeuteriobenzene was also recorded gas phase. Both spectra successfully simulated simple cosine potentials to describe motions. ground-state barrier rotation estimated be 220-235 cm(-1), which is similar that diphenylacetylene (tolane). Complementary DFT...
Picosecond time-resolved resonance Raman spectroscopy, TR3, reveals an intense acetylenic band in the S1 state of prototypical molecular wire 1,4-bis(phenylethynyl)benzene.
The Sonogashira cross-coupling of two equivalents para-substituted ethynylbenzenes with 2,5-diiodothiophene provides a simple synthetic route for the preparation 2,5-bis(para-R-phenylethynyl)thiophenes (R = H, Me, OMe, CF3, NMe2, NO2, CN and CO2Me) (1a–h). Likewise, 2,5-bis(pentafluorophenylethynyl)thiophene (2) was prepared by coupling pentafluorophenylacetylene. All compounds were characterised NMR, IR, Raman mass spectroscopy, elemental analysis, their absorption emission spectra, quantum...
High mobility organic semiconductor formulations with excellent uniformity across large area substrates are prepared via the use of containing small molecule and high permittivity semiconducting oligomers. The these high‐ k ( > 3.3) oligomers allows control wetting manipulation surface energy substrate being coated. Organic thin film transistors results mobilities up to 5 cm 2 V ‐1 s , standard deviation <10 %, on/off ratios 10 9 presented.
A series of novel thienyl aryleneethynylenes have been prepared by the Sonogashira cross-coupling dibrominated or diiodinated thiophenes with arylacetylenes. Previously we investigated properties 2,5-bis(phenylethynyl)thiophene, BPET (1), [Siddle et al., New J. Chem., 2007, 31, 841] and in this work go on to make chemical modification central moiety examine their influence photophysical arylethynylene system. Room low temperature absorption emission spectra recorded, along fluorescence...
As one of the world's major crops, oats ( Avena sativa L.) require management strategies to increase their yield and quality.
The flowering stage of oilseed rape ( Brassica napus L.) is vital interest in precision agriculture. It has been shown that data describing the flower production (OSR), at 3, spring can be used to predict seed yield harvest. Traditional field-based techniques for assessing OSR flowers are based on a visual assessment which subjective and time consuming. However, high throughput phenotyping technique, using an unmanned aerial vehicle (UAV) with multispectral image (MSI) camera, was...
A novel multi-technique approach has been applied for the identification and mapping of wild orchids using a combination remote sensing spectral image analysis. The five orchid species identified were common spotted-orchid ( Dactylorhiza fuchsia ), heath maculata ) , pyramidal Anacamptis pyramidalis fragrant-orchid Gymnadenia borealis dark-red helleborine Epipactis atrorubens ). Field studies have done hand-held spectrometer operating in 400–700 nm visible spectrum, photogrammetry digital...
A study of a group compounds based on the 1,4-bis(phenylethynyl)benzene (1) architecture was undertaken to improve our understanding their photophysics and factors which control geometry hence π- conjugation pathway in ground excited state these compounds. 1 exists as range molecular rotamers state, resulting from low barrier rotation around C(sp)-C(sp2) bonds. These are highly conjugated systems with good electron conducting properties, due delocalisation HOMO LUMO over molecule. In...
Abstract In this paper, we describe a versatile method for the patterning of dielectric and organic semiconductor (OSC) in an thin‐film transistor (OTFT) that have developed using commercially available material sets. OTFTs with on/off ratios 10 9 mobilities > 4 cm 2 /Vs can be produced CPI's FlexOS TM OSC Orthogonal Inc. OSCoR1510 photoresist.