Tuning Emission Lifetimes of Ir(C^N)2(acac) Complexes with Oligo(phenyleneethynylene) Groups (2023)
Journal Article
Davidson, R., Hsu, Y., Fox, M. A., Aguilar, J. A., Yufit, D., & Beeby, A. (2023). Tuning Emission Lifetimes of Ir(C^N)2(acac) Complexes with Oligo(phenyleneethynylene) Groups. Inorganic Chemistry, 62(6), 2793-2805. https://doi.org/10.1021/acs.inorgchem.2c03934

Emissive compounds with long emission lifetimes (μs to ms) in the visible region are of interest for a range of applications, from oxygen sensing to cellular imaging. The emission behavior of Ir(ppy)2(acac) complexes (where ppy is the 2-phenylpyridyl... Read More about Tuning Emission Lifetimes of Ir(C^N)2(acac) Complexes with Oligo(phenyleneethynylene) Groups.

Material Characterisation of William Burges’ Great Bookcase within the Disruption of a Global Pandemic (2022)
Journal Article
Ghigo, T., Bone, D., Howell, D., Domoney, K., Gironda, M., & Beeby, A. (2022). Material Characterisation of William Burges’ Great Bookcase within the Disruption of a Global Pandemic. Studies in Conservation, https://doi.org/10.1080/00393630.2022.2153463

This contribution presents the results of a technical investigation on the pigments of William Burges’ Great Bookcase (1859–62), preserved at the Ashmolean Museum. It is the first thorough material investigation of a remarkable piece of Gothic Reviva... Read More about Material Characterisation of William Burges’ Great Bookcase within the Disruption of a Global Pandemic.

Excited‐State Intramolecular Charge‐Transfer Dynamics in 4‐Dimethylamino‐4′‐cyanodiphenylacetylene: An Ultrafast Raman Loss Spectroscopic Perspective (2022)
Journal Article
Barak, A., Dhiman, N., Sturm, F., Rauch, F., Lakshmanna, Y. A., Findlay, K. S., …Umapathy, S. (2022). Excited‐State Intramolecular Charge‐Transfer Dynamics in 4‐Dimethylamino‐4′‐cyanodiphenylacetylene: An Ultrafast Raman Loss Spectroscopic Perspective. ChemPhotoChem, 6(12), Article e202200146. https://doi.org/10.1002/cptc.202200146

The D-π-A compound 4-dimethylamino-4′-cyanodiphenylacetylene (DACN-DPA) exhibits intramolecular charge transfer (ICT) upon photoexcitation. Ultrafast Raman Loss Spectroscopy (URLS) measurements show distinct spectral and temporal dynamics of C≡C and... Read More about Excited‐State Intramolecular Charge‐Transfer Dynamics in 4‐Dimethylamino‐4′‐cyanodiphenylacetylene: An Ultrafast Raman Loss Spectroscopic Perspective.

Divergent Approach for Tris-Heteroleptic Cyclometalated Iridium Complexes Using Triisopropylsilylethynyl-Substituted Synthons (2022)
Journal Article
Edkins, R. M., Hsu, Y., Fox, M. A., Yufit, D., Beeby, A., & Davidson, R. J. (2022). Divergent Approach for Tris-Heteroleptic Cyclometalated Iridium Complexes Using Triisopropylsilylethynyl-Substituted Synthons. Organometallics, https://doi.org/10.1021/acs.organomet.2c00292

Bis-heteroleptic cyclometalated iridium complexes of the form Ir(La)2(acac), where La is a substituted 2-phenylpyridine derivative and acac is an acetylacetonato ligand, are a useful class of luminescent organometallic complexes for a range of applic... Read More about Divergent Approach for Tris-Heteroleptic Cyclometalated Iridium Complexes Using Triisopropylsilylethynyl-Substituted Synthons.

The Admiral, the Virgin, and the Spectrometer: Observations on the Coëtivy Hours (Dublin, Chester Beatty Library, W082) (2020)
Journal Article
Gameson, R., Nicholson, C., & Beeby, A. (2020). The Admiral, the Virgin, and the Spectrometer: Observations on the Coëtivy Hours (Dublin, Chester Beatty Library, W082). Gesta, 59(2), 203-231. https://doi.org/10.1086/710024

This article examines the nature and implications of the extensive Marian texts and imagery in the mid-fifteenth-century Parisian Coëtivy Hours (Dublin, Chester Beatty Library, MS W082), and reports the findings from scientific investigation of the i... Read More about The Admiral, the Virgin, and the Spectrometer: Observations on the Coëtivy Hours (Dublin, Chester Beatty Library, W082).

Enolization rates control mono- versus di-fluorination of 1,3-dicarbonyl derivatives (2019)
Journal Article
Rozatian, N., Beeby, A., Ashworth, I. W., Sandford, G., & Hodgson, D. R. (2019). Enolization rates control mono- versus di-fluorination of 1,3-dicarbonyl derivatives. Chemical Science, 10(44), 10318-10330. https://doi.org/10.1039/c9sc04185k

Fluorine-containing 1,3-dicarbonyl derivatives are essential building blocks for drug discovery and manufacture. To understand the factors that determine selectivity between mono- and di-fluorination of 1,3-dicarbonyls systems, we have performed kine... Read More about Enolization rates control mono- versus di-fluorination of 1,3-dicarbonyl derivatives.

Wide-field time-correlated single photon counting-based fluorescence lifetime imaging microscopy (2019)
Journal Article
Suhling, K., Hirvonen, L. M., Becker, W., Smietana, S., Netz, H., Milnes, J., …Beeby, A. (2019). Wide-field time-correlated single photon counting-based fluorescence lifetime imaging microscopy. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 942, Article 162365. https://doi.org/10.1016/j.nima.2019.162365

Wide-field time-correlated single photon counting detection techniques, where the position and the arrival time of the photons are recorded simultaneously using a camera, have made some advances recently. The technology and instrumentation used for t... Read More about Wide-field time-correlated single photon counting-based fluorescence lifetime imaging microscopy.

Highly Linearized Twisted Iridium(III) Complexes (2018)
Journal Article
Davidson, R., Hsu, Y., Griffiths, G. C., Li, C., Yufit, D., Pal, R., & Beeby, A. (2018). Highly Linearized Twisted Iridium(III) Complexes. Inorganic Chemistry, 57(22), 14450-14462. https://doi.org/10.1021/acs.inorgchem.8b02818

Sonogashira coupling with alkyne iridium(phenylpyridine)2(acetylacetone) synthons is used to produce highly linearized twisted iridium(III) complexes with lengths of up to 5 nm. These complexes were mechanically aligned in a polymer matrix, showing a... Read More about Highly Linearized Twisted Iridium(III) Complexes.

Conductance of ‘bare-bones’ tripodal molecular wires (2018)
Journal Article
Davidson, R. J., Milan, D. C., Al-Owaedi, O. A., Ismael, A. K., Nichols, R. J., Higgins, S. J., …Beeby, A. (2018). Conductance of ‘bare-bones’ tripodal molecular wires. RSC Advances, 8(42), 23585-23590. https://doi.org/10.1039/c8ra01257a

Controlling the orientation of molecular conductors on the electrode surfaces is a critical factor in the development of single-molecule conductors. In the current study, we used the scanning tunnelling microscopy-based break junction (STM-BJ) techni... Read More about Conductance of ‘bare-bones’ tripodal molecular wires.

Novel synthesis and properties of hydrogen-free detonation nanodiamond (2018)
Journal Article
Batsanov, S. S., Osavchuk, A. N., Naumov, S. P., Gavrilkin, S. M., Leskov, A. S., Mendis, B. G., …Batsanov, A. S. (2018). Novel synthesis and properties of hydrogen-free detonation nanodiamond. Materials Chemistry and Physics: Including Materials Science Communications, 216, 120-129. https://doi.org/10.1016/j.matchemphys.2018.05.072

Practically hydrogen-free nanodiamond (HFND), a prospective neutron-optical material, was prepared (in up to 3% yield) by detonating pure or graphite-doped RDX in an ice shell and comprehensively characterized by elemental analysis, X-ray diffraction... Read More about Novel synthesis and properties of hydrogen-free detonation nanodiamond.

There’s More to Reflectance Spectroscopy Than Lux (2018)
Journal Article
Beeby, A., Garner, L., Howell, D., & Nicholson, C. E. (2018). There’s More to Reflectance Spectroscopy Than Lux. Journal of the Institute of Conservation, 41(2), 142-153. https://doi.org/10.1080/19455224.2018.1463920

Fibre-optic reflectance spectroscopy is widely used as a tool for the analysis of coloured materials such as pigments and paints. We describe a new design for a FORS probe which is held some 5cm away from the sample surface and interrogates a spot of... Read More about There’s More to Reflectance Spectroscopy Than Lux.

Raman spectroscopic library of medieval pigments collected with five different wavelengths for investigation of illuminated manuscripts (2018)
Journal Article
Marucci, G., Beeby, A., Parker, A., & Nicholson, C. (2018). Raman spectroscopic library of medieval pigments collected with five different wavelengths for investigation of illuminated manuscripts. Analytical Methods, 10(10), 1219-1236. https://doi.org/10.1039/c8ay00016f

Raman spectroscopy is widely applied in the cultural heritage field to perform non-destructive measurements in situ, in order to identify materials, specifically pigments. The spectra collected can be challenging to interpret because certain source l... Read More about Raman spectroscopic library of medieval pigments collected with five different wavelengths for investigation of illuminated manuscripts.

Sky-blue emitting bridged diiridium complexes: beneficial effects of intramolecular π–π stacking (2018)
Journal Article
Congrave, D. G., Hsu, Y., Batsanov, A. S., Beeby, A., & Bryce, M. R. (2018). Sky-blue emitting bridged diiridium complexes: beneficial effects of intramolecular π–π stacking. Dalton Transactions, 47(6), 2086-2098. https://doi.org/10.1039/c7dt04201a

The potential of intramolecular π–π interactions to influence the photophysical properties of diiridium complexes is an unexplored topic, and provides the motivation for the present study. A series of diarylhydrazide-bridged diiridium complexes funct... Read More about Sky-blue emitting bridged diiridium complexes: beneficial effects of intramolecular π–π stacking.

Assembly of High-Potency Photosensitizer–Antibody Conjugates through Application of Dendron Multiplier Technology (2017)
Journal Article
Bryden, F., Maruani, A., Rodrigues, J. M., Cheng, M. H., Savoie, H., Beeby, A., …Boyle, R. W. (2018). Assembly of High-Potency Photosensitizer–Antibody Conjugates through Application of Dendron Multiplier Technology. Bioconjugate Chemistry, 29(1), 176-181. https://doi.org/10.1021/acs.bioconjchem.7b00678

Exploitation of photosensitizers as payloads for antibody-based anticancer therapeutics offers a novel alternative to the small pool of commonly utilized cytotoxins. However, existing bioconjugation methodologies are incompatible with the requirement... Read More about Assembly of High-Potency Photosensitizer–Antibody Conjugates through Application of Dendron Multiplier Technology.

Identifying eighteenth century pigments at the Bodleian library using in situ Raman spectroscopy, XRF and hyperspectral imaging (2017)
Journal Article
Mulholland, R., Howell, D., Beeby, A., Nicholson, C., & Domoney, K. (2017). Identifying eighteenth century pigments at the Bodleian library using in situ Raman spectroscopy, XRF and hyperspectral imaging. Heritage Science, 5(1), Article 43. https://doi.org/10.1186/s40494-017-0157-y

There are multiple challenges in analysing pigments in historic watercolour paintings on paper, and typically non-invasive, in situ methods are required. Recent developments in portable analytical instrumentation have made this more accessible to her... Read More about Identifying eighteenth century pigments at the Bodleian library using in situ Raman spectroscopy, XRF and hyperspectral imaging.

Exploring the Chemistry and Photophysics of Substituted Picolinates Positional Isomers in Iridium(III) Bisphenylpyridine Complexes (2017)
Journal Article
Davidson, R., Hsu, Y., Bhagani, C., Yufit, D., & Beeby, A. (2017). Exploring the Chemistry and Photophysics of Substituted Picolinates Positional Isomers in Iridium(III) Bisphenylpyridine Complexes. Organometallics, 36(15), 2727-2735. https://doi.org/10.1021/acs.organomet.7b00179

A simple and versatile route for modifying picolinate ligands coordinated to iridium is described. Reacting a μ-chloro iridium(C∧N) dimer (where C∧N is a phenylpyridine-based ligand) with bromopicolinic acid (HpicBr) yields the corresponding iridium(... Read More about Exploring the Chemistry and Photophysics of Substituted Picolinates Positional Isomers in Iridium(III) Bisphenylpyridine Complexes.

Understanding Ultrafast Dynamics of Conformation Specific Photo-Excitation: A Femtosecond Transient Absorption and Ultrafast Raman Loss Study (2017)
Journal Article
Roy, K., Kayal, S., Kumar, V. R., Beeby, A., Ariese, F., & Umapathy, S. (2017). Understanding Ultrafast Dynamics of Conformation Specific Photo-Excitation: A Femtosecond Transient Absorption and Ultrafast Raman Loss Study. The Journal of Physical Chemistry A, 121(35), 6538-6546. https://doi.org/10.1021/acs.jpca.7b03893

Excited state ultrafast conformational reorganization is recognized as an important phenomenon that facilitates light-induced functions of many molecular systems. This report describes the femtosecond and picosecond conformational relaxation dynamics... Read More about Understanding Ultrafast Dynamics of Conformation Specific Photo-Excitation: A Femtosecond Transient Absorption and Ultrafast Raman Loss Study.

Triphenylide-Based Molecular Solid—A New Candidate for a Quantum Spin-Liquid Compound (2017)
Journal Article
Štefančič, A., Klupp, G., Knaflič, T., Yufit, D. S., Tavčar, G., Potočnik, A., …Arčon, D. (2017). Triphenylide-Based Molecular Solid—A New Candidate for a Quantum Spin-Liquid Compound. Journal of Physical Chemistry C, 121(27), 14864-14871. https://doi.org/10.1021/acs.jpcc.7b02763

The reduction of polycyclic aromatic hydrocarbons with alkali metals results in solids having intriguing magnetic properties the understanding of which has been hitherto severely hampered by the lack of single-phase samples. Here, we report on the su... Read More about Triphenylide-Based Molecular Solid—A New Candidate for a Quantum Spin-Liquid Compound.

New light on old illuminations (2017)
Journal Article
Beeby, A., Gameson, R., & Nicholson, C. (2018). New light on old illuminations. Archives and Records, 39(2), 244-256. https://doi.org/10.1080/23257962.2017.1325729

This article describes a unique suite of mobile equipment designed for non-invasive, non-destructive identification of the inks and pigments in medieval manuscripts. It explains the circumstances which led to the development of the equipment, outline... Read More about New light on old illuminations.

Mode specific excited state dynamics study of bis(phenylethynyl)benzene from ultrafast Raman loss spectroscopy (2017)
Journal Article
Roy, K., Kayal, S., Ariese, F., Beeby, A., & Umapathy, S. (2017). Mode specific excited state dynamics study of bis(phenylethynyl)benzene from ultrafast Raman loss spectroscopy. The Journal of Chemical Physics, 146(6), Article 064303. https://doi.org/10.1063/1.4975174

Femtosecond transient absorption (fs-TA) and Ultrafast Raman Loss Spectroscopy (URLS) have been applied to reveal the excited state dynamics of bis(phenylethynyl)benzene (BPEB), a model system for one-dimensional molecular wires that have numerous ap... Read More about Mode specific excited state dynamics study of bis(phenylethynyl)benzene from ultrafast Raman loss spectroscopy.