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Viewing archived talks in: RSC Award Lectures
RSC Award Lectures
Speaker: Manfred Bochmann (East Anglia)
Putting Organometallic Chemistry to Work
The talk will briefly review contributions to unravelling the mechanism and principles of homogeneously catalysed olefin polymerisation catalysis and the applications of this chemistry to carbocationic polymerisations for more sustainable industrial processes, before concentrating on recent advances in the chemistry of coinage metals, from gold(III) anti -cancer compounds to new approaches to the molecular design of highly efficient photoemitters for orga nic light -emitting diodes. Download PDF
On: October 19, 2017 From: 16h00 To: 17h00View talk
RSC Award Lectures
Speaker: Elaine O'Reilly (Nottingham)
Amine transaminases mediate the conversion of prochiral ketones to chiral amines, in the presence of a suitable amine donor. This talk will focus on stra tegies to overcome the challenges associated with the application of these enzymes for the synthesis of chiral amines including unfavorable reaction equilibria and limited substrate scope. Download PDF
On: May 30, 2018 From: 15h30 To: 16h30View talk
RSC Award Lectures
Speaker: Jas Pal Badyal (Durham)
The worldwide market for functional surfaces exceeds $100 billion per annum (US Department of Energy). A key driver is the added value that can be imparted to commercial products through the molecular engineering of their surface properties. For example, the cleanliness of optical lenses, the feel of fabrics, the resistance of biomedical devices to bacteria , the speed of computer hard disks, and even the wear of car brake pads are all governed by their surface properties. The fabrication of such surfaces requires the incorporation of specific functional groups; for which there exists no shortage of potential methods including: self -assembled monolayers (SAMs), Langmuir -Blodgett films, dip -coating, grafting, chemical vapour deposition, to name just a few. However such techniques suffer from drawbacks including substrate -specificity (cannot be easily adapted to different materials or geometries) and environmental concerns associated with the utilization of solvents, strong acid / base media, or heat. A range of innovative solutions will be described for the molecular tailoring of solid surfaces. Applications w ill include: super -repellency, non -fouling, anti -fogging, thermoresponsive, rewritable bioarrays, opto -chiral, antibacterial, electrical barrier, water harvesting, capture and release, oil -water separation, and nano -actuation. This research has led to 41 patent families and the establishment of 3 successful start -up companies: Surface Innovations Ltd, Dow Corning Plasma Ltd, and P2i Ltd (2015 International Business Award for 'Most Innovative Company in Europe'). Download PDF
On: June 13, 2018 From: 15h30 To: 16h30View talk
RSC Award Lectures
Speaker: Artem Bakulin (Imperial College London)
Ultrafast photocurrent spectroscopy of molecular electronic devices Artem A. Bakulin Department of Chemistry, Imperial College London London SW7 2AZ, UK email@example.com
I will present an old but well -forgotten advanced time -resolved spectroscopic technique based on the ultrafast optical control of molecular excited states followed by photocurrent detection. The method is very useful to study electronic dynamics in molecular semiconducting materials and organic optoelectronic devices , like plastic solar cells, under working conditions. 1 Using th is method , we were able to identify and track in time the precursor and charge trapping states in a variety of material systems, including polymer -fullerene blends, polyme r-oxide hybrids, colloidal quantum dots and perovskites. We show that a careful management of charge and energy dynamics in the excited st ate can substantially suppress the loss pathways and improve the device performance.
1 Bakulin A.A., Silva C., Ve lla E., Ultrafast Spectroscopy with Photocurrent Detection: Watching Excitonic Optoelectronic Systems at Work, J. Phys. Chem. Lett. 7, 250 (2016) Download PDF
On: April 24, 2019 From: 14h00 To: 15h00View talk
RSC Award Lectures
Speaker: Daniele Leonori (Manchester)
Photoinduced Assembly of C -N Bonds Dr Daniele Leonori School of Chemistry, University of Manchester, Manchester M13 9PL, UK firstname.lastname@example.org Nitrogen -containing compounds are a privileged class of molecules, which have applications in medicines, agrochemicals, dyes and materials. This relevance makes the construction of C –N bonds an extremely active area of research. Nitrogen -radicals are versa tile synthetic intermediates that can engage in a broad range of chemical reactions. 1 However, the difficulties associated with their generation have somewhat thwarted their use in synthetic chemistry. Development of Photoinduced Radical -Transposition Reactions We have developed a class of easy -to -make oximes and hyroxy -amides that upon photoredox oxidation enable access to iminyl and amidyl radicals. 2,3 These species have been used in radical transposition reactions for the site -selective functionaliza tion of unactivated sp 3-carbons. These strategies have been applied to the deconstruction –functionalization of complex steroids (radical ring -opening) 2 and to the preparation of unnatural aminoacids (1,5 -HAT) .3 Development of Photoinduced Aromatic C –H Ami nation Reactions Aminated aromatics are a widespread motif in high -value products. In general, these structures are assemble d by Pd or Cu -catalysed cross -couplings between aryl halides/organoboron and amines. We have developed an umpolung approach where electrophilic amidyl and aminyl radicals are generated by photoredox reduction of electron poor N-aryloxy -amides and -amines. 4,5 These radical specie s undergo highly selective addition to a broad range of electron rich aromatics thus enabling direct C – H amination. References 1. Review: S. Z. Zard Chem. Soc. Rev. 2008 , 37 , 1603. 2. Angew. Chem. Int. Ed. 2018 , 57 , 744. 3. Angew. Chem. Int. Ed. 2018 , 57 , 12495. 4. J. Am. Chem. Soc. 2016 , 138 , 8092. 5. Angew. Chem. Int. Ed. 2017 , 56 , 14948. Download PDF
On: May 1, 2019 From: 14h00 To: 15h00View talk
RSC Award Lectures
RSC Corday Morgan Award Lecture - Solar-driven Reforming of Waste Polymers for the Synthesis of Sustainable Fuels and Chemicals
Speaker: Erwin Reisner (Cambridge)
The synthesis of solar fuels and chemicals through artificial photosynthesis allows the direct pairing of light absorption to drive chemical redox processes. This approach is a one-step and versatile alternative to the more indirect coupling of a photovoltaic cell with electrolysis and enables potentially the synthesis of a wide range of fuels and feedstock chemicals. A common drawback in most artificial photosynthetic systems and organic photocatalysis is their reliance on expensive materials and device architectures, which challenges the development of ultimately scalable devices. Another limitation in many approaches is their inefficiency and reliance on sacrificial redox reagents, which may be system damaging and often prevent truly energy-storing chemistry to proceed. This presentation will give an overview about our recent progress in developing semiconductor suspension systems to perform efficient full redox cycle solar catalysis with inexpensive components, and our approach for sustainable waste polymer (biomass and plastics) photoreforming and fine chemical synthesis.
Representative recent publications
(1) “Electro- and solar-driven fuel synthesis with first row transition metal complexes”
Dalle, Warnan, Leung, Reuillard, Karmel, Reisner, Chem. Rev., 2019, 119, 1752.
(2) “Photoreforming of lignocellulose into H2 using nanoengineered carbon nitride under benign conditions”
Kasap, Achilleos, Huang, Reisner, J. Am. Chem. Soc., 2018, 140, 11604.
(3) “Plastic waste as a feedstock for solar-driven H2 generation”
Uekert, Kuehnel, Wakerley, Reisner, Energy Environ. Sci., 2018, 11, 2853.
(4) “Solar Hydrogen Generation from Lignocellulose”
Kuehnel, Reisner, Angew. Chem. Int. Ed., 2018, 57, 3290.
(5) “Solar-driven reforming of lignocellulose to H2 with a CdS/CdOx photocatalyst”
Wakerley, Kuehnel, Orchard, Ly, Rosser, Reisner, Nature Energy, 2017, 2, 17021.
(6) “Carbon dots as photosensitisers for solar-driven catalysis”
Hutton, Martindale, Reisner, Chem. Soc. Rev., 2017, 47, 6111.
(7) “Solar-driven Reduction of Protons Coupled to Alcohol Oxidation with a Carbon Nitride-Catalyst System”
Kasap, Caputo, Martindale, Godin, Lau, Lotsch, Durrant, Reisner, J. Am. Chem. Soc., 2016, 138, 9183.
On: May 29, 2019 From: 14h00 To: 15h00View talk