A5024697448- Crystallization and Solubility Studies
- CO2 Reduction Techniques and Catalysts
- X-ray Diffraction in Crystallography
- Organic Electronics and Photovoltaics
- Advanced Photocatalysis Techniques
- Electrochemical Analysis and Applications
- Molecular Sensors and Ion Detection
- Molecular Junctions and Nanostructures
- Advanced battery technologies research
- Fullerene Chemistry and Applications
- Electrocatalysts for Energy Conversion
- Carbon dioxide utilization in catalysis
- Organic Light-Emitting Diodes Research
- Photochemistry and Electron Transfer Studies
- Organic and Molecular Conductors Research
- Photodynamic Therapy Research Studies
- Lanthanide and Transition Metal Complexes
- Metal complexes synthesis and properties
- Luminescence and Fluorescent Materials
- Magnetism in coordination complexes
- Synthesis and Properties of Aromatic Compounds
- Metalloenzymes and iron-sulfur proteins
- Spectroscopy and Quantum Chemical Studies
- Machine Learning in Materials Science
- Conducting polymers and applications
University of Sheffield
2019-2025
University of Pittsburgh
2025
Chevron (United States)
2025
Abstract Two novel cyclometallated iridium(III) complexes have been prepared with one bidentate or two monodentate imidazole-based ligands, 1 and 2 , respectively. The showed intense emission long lifetimes of the excited state. Femtosecond transient absorption experiments established nature lowest state as 3 IL Singlet oxygen generation good yields (40% for 82% ) was by detecting O directly, through its at 1270 nm. Photostability studies were also performed to assess viability...
Abstract Non‐fullerene acceptors have revolutionised organic photovoltaics. However, greater fundamental understanding is needed of the crucial relationships between molecular structure and photophysical mechanisms. Herein, a combination spectroscopic, morphology, device characterization techniques are used to explore these for high‐performing non‐fullerene acceptor, anti‐PDFC. It focuses on transient absorption spectroscopy across multiple timescales ultrafast time‐resolved vibrational...
This work demonstrates photocatalytic CO2 reduction by a noble-metal-free photosensitizer-catalyst system in aqueous solution under red-light irradiation. A water-soluble Mn(I) tricarbonyl diimine complex, [MnBr(4,4'-{Et2O3PCH2}2-2,2'-bipyridyl)(CO)3] (1), has been fully characterized, including single-crystal X-ray crystallography, and shown to reduce CO following photosensitization tetra(N-methyl-4-pyridyl)porphyrin Zn(II) tetrachloride [Zn(TMPyP)]Cl4 (2) 625 nm is the first example of 2...
A ligand skeleton combining a 1,10-phenanthroline (phen) binding site and one or two heptadentate N3O4 aminocarboxylate sites, connected via alkyne spacers to the phen C3 C3/C8 positions, has been used prepare range of heteronuclear Ru·M Ru·M2 complexes which have evaluated for their cell imaging, relaxivity, photophysical properties. In all cases unit is bound {Ru(bipy)2}2+ give phosphorescent {Ru(bipy)2(phen)}2+ luminophore, pendant sites are occupied by secondary metal ion M either...
Novel molecular Re and Mn tricarbonyl complexes bearing a bipyridyl ligand functionalised with sterically hindering substituents in the 6,6'-position, [M(HPEAB)(CO)3(X)] (M/X = Re/Cl, Mn/Br; HPEAB 6,6'-{N-(4-hexylphenyl)-N(ethyl)-amido}-2,2'-bipyridine) have been synthesised, fully characterised including by single crystal X-ray crystallography, their propensity to act as catalysts for electrochemical photochemical reduction of CO2 has established. Controlled potential electrolysis showed...
The rate of intersystem crossing increases, whilst the rates charge separation and recombination decrease in donor–CC–Pt–CC–acceptor systems with a stronger electron acceptor – as revealed by fluorescence upconversion ultrafast IR methods.
The photophysical and electrochemical properties of the diiron hydrogenase mimic complex, [Fe2(dpet)(CO)6] (dpet = 1,2-diphenylethene-1,2-dithiol) have been studied using a combination spectroscopic techniques including cyclic voltammetry, infrared spectroelectrochemistry (IR-SEC), ultrafast transient absorption (TA) spectroscopy time-resolved (TRIR), with data interpretation aided by (time-dependent) density functional theory (DFT). complex is viable catalyst for hydrogen evolution, as...
The bimolecular recombination characteristics of conjugated polymer poly[(4,4'-bis(2-ethylhexyl)dithieno[3,2-b:2',3'-d]silole)-2,6-diyl-alt-(2,5-bis 3-tetradecylthiophen-2-yl thiazolo 5,4-d thiazole)-2,5diyl] (PDTSiTTz) blended with the fullerene series PC60BM, ICMA, ICBA, and ICTA have been investigated using microsecond femtosecond transient absorption spectroscopy, in conjunction electroluminescence measurements ambient photoemission spectroscopy. non-Langevin PDTSiTTz allows an...
Photoelectrocatalysis offers the opportunity to close carbon loop and convert captured CO 2 back into useful fuels feedstocks, mitigating against anthropogenic climate change.
Donor–bridge–acceptor complexes (D–B–A) are important model systems for understanding of light-induced processes. Here, we apply two-color two-dimensional infrared (2D-IR) spectroscopy to D–B–A with a trans-Pt(II) acetylide bridge (D–C≡C–Pt–C≡C–A) uncover the mechanism vibrational energy redistribution (IVR). Site-selective 13C isotopic labeling is used decouple modes positioned on either side Pt-center. Decoupling D-acetylide- from A-acetylide- enables site-specific investigation transfer...