New paper in ACS Nano
Congratulations to Josh, Elliott and Keith on their new paper in ACS Nano (https://doi.org/10.1021/acsnano.2c11240) with a team led by Han Young Woo from Korea University in Seoul. Han Young’s team came out for a research visit a few years and this has culminated in this work. The paper describes the use of polymer dots doped with strong Raman scattering dyes. One advantage is the suppression of emission from the dyes that permits the resonance Raman signal to be observed. Using slight modifications to the truxene-based dyes it is possible to modify the resonant electronic transition and the Raman signature. This allows for a bar-coding approach to sensing as similar materials can be programmed to give differing spectral responses.
New paper in the Journal of the American Chemical Society
Congratulations to Josh and Keith on their new paper in JACS (DOI: 10.1021/jacs.2c12605) with a team led by Paul Hume and Justin Hodgkiss. The paper describes how a combination of spectroscopy, calculations and synthesis of a series of compounds provides insight into the kinetics of intersystem crossing (ISC). ISC is an intrinsic exciton loss channel. The paper shows that conformational disorder is a key driver in facile ISC and delivers some key design criteria for efficient organic photovoltaics and light-emitting diodes.
New paper in Proceedings of the National Academy of Sciences
Congratulations to Keith and Joshua who recently saw a collaborative project come to fruition in a paper entitled, “The photoprotection mechanism in the black–brown pigment eumelanin” in the Proceedings of the National Academy of Sciences (https://doi.org/10.1073/pnas.22123431). The work led by Jostin Hodgkiss and involving Paul Hume describes the photochemistry of skin pigments and is relevant to human health in a broad sense.
New paper in J. Phys. Chem. A
Congratulations to Sam, Joe and Keith on their recent publication “Investigation of the Geometric and Spectroscopic Properties of Four Twisted Triphenylpyridinium Donor-Acceptor Dyes” (J. Phys. Chem. A 2022, 126, 34, 5681–5691, https://doi.org/10.1021/acs.jpca.2c03380). A suite of spectroscopic and computational techniques such as resonance Raman and variable temperature emission portrayed the importance of ground and excited state geometry configurations on the electronic behaviour of these twisted dyes.
New paper in Aquaculture Research.
“Rapid quantitation of feed rotifer (Brachionus plicatilis) fatty acids by Raman spectroscopy” https://doi.org/10.1111/are.16120 describes collaborative work between Otago (Chem) and led by Daniel Killeen from Plant and Food. The paper describes how Raman spectroscopy may be used to establish the nutritional value of rotifers (a feedstock for juvenile fish) fed with specific diets.
Congratulations to Jeremy and Keith who contributed
The nutrient enrichment of the rotifers could be assessed and quantified by Raman spectroscopy. This is a useful way to quality control high nutrition rotifer production.
New paper in Marine Pollution Bulletin
Congratulations to Sara, Peter, Fatema and Keith on this recent publication (Marine Pollution Bulletin, 2022, 184, 114121, https://doi.org/10.1016/j.marpolbul.2022.114121). The work was led by Bridie Allen and Isabella Clere from Marine Science (Otago)
Raman microscopy was used to measure plastic contaminants from fish to discover levels of pollutant and the most persistent plastics present.
The study “study provides baseline information to supplement the lack of current research in the South Pacific, specifically southern New Zealand, on microplastics ingested in commercial wild fish destined for human consumption”
New publication in Advanced Drug Delivery Reviews
Congratulations to Bishal R. Adhikari, Kim Chan, Keith C Gordon and Shyamal Das for their recent publication “Solid state of inhalable high dose powders” in Advanced Drug Delivery Reviews (2022) 189, 114468 https://doi.org/10.1016/j.addr.2022.114468
The review deals with powder formulations that was the subject of Bishal’s PhD thesis which he recently successfully defended
New publication in Molecules
Fatema Ahmmed, Daniel P Killeen, Keith C Gordon and Sara J Fraser-Miller recently published a paper entitled “Rapid quantitation of adulterants in premium marine oils by Raman and IR spectroscopy: a data fusion approach” in Molecules (2022) 27, 4534 https://doi.org/10.3390/molecules27144534.
The paper uses data fusion and vibrational spectroscopy to classify differing adulterants in premium marine oils, such as cod liver oil, and then having classified the adulterant quantification of the adulterant is obtained.
This paper is part of the the Special Issue Women’s Special Issue Series: Analytical Chemistry
New publication in Expert Opinion on Drug Delivery
A new publication by Bishal Raj Adhikari, Jack Dummer, Keith C. Gordon and Shyamal C. Das entitled “An expert opinion on respiratory delivery of high dose powders for lung infections” was recently published in Expert Opinion on Drug Delivery (2022) 19, 795 – 813 https://doi.org/10.1080/17425247.2022.2089111
This work highlights innovations in this area and notes the challenges that the area of research faces.
New publication in Analytical Chemistry
Karlis, Sara, Keith and Thomas Rades (Copenhagen) recently published a paper in Analytical Chemistry (2022) 94, 8241 – 8248 https://doi.org/10.1021/acs.analchem.2c00371 (369) that describes how low frequency Raman may be used to sense mobility of molecules in the glassy state. By monitoring the shape of the low frequency Raman scattering in the Stokes and anti-Stokes regions. Not only is it possible to see the primary glass transition temperature, the so-called Tg or Tα, but it is also possible the Tβ transition which represents much more subtle local changes in microstructure.
Tβ is important because it appears to be linked to shelf-life for pharmaceuticals.
