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DTSTAMP:20260410T195105
DTSTART:20190408T140000
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URL:https://murmitoyen.com/events/vanille/udem/detail/866956-conference-de-
 chimie-avec-professeure-audrey-moores
LOCATION:Pavillon Roger Gaudry – Université de Montréal\, Montréal\, Q
 C\, Canada
SUMMARY:Conférence de chimie avec Professeure Audrey Moores
DESCRIPTION: 
\n 
\nTitre : Solvent-free Approaches to Nanoparticles Synt
 hesis and Polymer Functionalization and Plasmonic Catalytic Hydrogenation 
 Reactions
\n 
\nEndroit: Pavillon Roger-Gaudry\, Salle M-415
\n 
\nHôt
 e: Schmitzer Andreea-Ruxandra
\n 
\nRésumé : Nanomaterials are intensel
 y researched for their powerful properties applicable in the broad fields 
 of medicine\, electronics\, optics and catalysis. We developed a novel syn
 thetic method for the scalable production of metal and metal sulfide NPs u
 nder solvent-free\, mechanochemical conditions. The synthesis of Au NPs pr
 ovided access to monodisperse and ultra-small NPs in the size range of 1
 –4 nm\, without external reducing agents or bulk solvents.1 Using lignin
  as a biomass-based reducer\, we could access embedded NPs of Au\, Ru\, Pd
  and Re.2 With Ag\, this method gave access to antibacterial filters in a 
 simplified fashion.3 We also explored the synthesis of metal sulfide with 
 similar Bi2S3 nanoparticles were easily synthesized by mechanochemical act
 ivation from molecular precursors and cysteine as a sulfur source\, follow
 ed by aging to afford X-ray active materials. These materials are exciting
  candidates for cancer detection.4 In last examples\, I’ll illustrate ho
 w mechanochemistry and aging techniques may be used towards the efficient 
 functional of man-made and biomass based polymers\, such as cellulose nano
 crystals5 and chitin.6Besides\, we have employed silver nanocubes for hydr
 ogen activation and hydrogenation of ketones and aldehydes via irradiation
  at 405 nm\, corresponding to the position of the plasmon band of the nano
 cubes.7 Exposure to other wavelengths\, or absence of light failed to prov
 ide activity thus proving the plasmonic effect. Compared to other catalyti
 c systems\, the plasmonically activated catalyst provides access to primar
 y and secondary alcohols using milder conditions\, in a highly atom econom
 ical fashion.
\n 
\n1. M. J. Rak\, N. K. Saadé\, T. Friščić and A. Mo
 ores\, Green Chem.\, 2014\, 16\, 86-89.2. M. J. Rak\, T. Friščić and A.
  H. Moores\, Faraday Discuss.\, 2014\, 170\, 155-167.3. M. J. Rak\, T. Fri
 ščić and A. Moores\, RSC Adv.\, 2016\, 6\, 58365-58370.4. M. Y. Malca\,
  H. Bao\, T. Bastaille\, N. K. Saadé\, J. M. Kinsella\, T. Friščić and
  A. Moores\, Chem. Mater.\, 2017\, 29\, 7766–7773.5. B.G. Fiss\, L. Hath
 erly\, R.S. Stein\, T. Friščić\, A. Moores\, ACS Sustainable Chem. Eng.
  2019\, in press.6. T. Di Nardo\, C. Hadad\, A. Nguyen Van Nhien\, A. Moor
 es\, ChemRxiv\, 2018\, https://doi.org/10.26434/chemrxiv.7312070.v37. M. L
 andry\, A. Gellé\, B. Y. Meng\, C. J. Barrett and A. Moores\, ACS Catal.\
 , 2017\, 7\, 6128–6133.
\n 
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