Browsing Faculté des arts et des sciences – Département de chimie – Travaux et publications by Title
Now showing items 1-20 of 58
-
Absorption and luminescence spectroscopy of transition metal compounds : from coordination geometries to excited-state properties
(Société de spectroscopie du Canada, 2008)Absorption spectra of transition metal compounds provide important experimental information for the understanding of their chemistry. The combination with luminescence spectra yields quantitative insight on excited-state properties, in particular ... -
Anisotropic contributions in the chromatographic elution behavior of fullerenes and fullertubes
(American Chemical Society, 2024-07-24)The retention behavior of fullerenes and fullertubes on a PYE column in reversed-phase chromatography was investigated to clarify the influence of their shapes on the separation process. The impact of anisotropy was further elucidated using a pair ... -
Azobenzene molecular glasses with tuned glass transition temperatures : from optimal light‐induced motion to self‐erasable gratings
(Royal Society of Chemistry, 2020-04-01)The rate of photomechanical formation of surface relief gratings (SRG) in thin films of azobenzene materials depends on their glass transition temperature (Tg), with an optimal Tg around 50–60 °C yielding the fastest SRG growth. Herein, the SRG growth ... -
Biological impacts of Ce nanoparticles with different surface coatings as revealed by RNA-Seq in Chlamydomonas reinhardtii
(Elsevier, 2020-05-18)In order to better understand the risks of engineered nanoparticles (ENPs), it is necessary to determine their fate and biological effects under realistic exposure scenarios (e.g. low ENP concentrations). RNA-Seq was deployed to characterize the ... -
Bridging the gap between the mesoscopic 2D order–order transition and molecular-level reorganization in dot-patterned block copolymer monolayers
(American Chemical Society, 2016-11-21)Langmuir–Blodgett (LB) films of amphiphilic block copolymers (BCs) form well-defined nanostructures with long-range order useful, for instance, for nanolithography applications. Nanostructures with a 2D circular micelle (“dot”) morphology are known to ... -
Chimie des matériaux
(CRDP Midi-Pyrénées, 1997) -
Colossal C130 fullertubes : soluble [5,5] C130-D5h(1) pristine molecules with 70 nanotube carbons and two 30-atom hemifullerene end-caps
(American Chemical Society, 2023-10-27)We report the seminal experimental isolation and DFT characterization of pristine [5,5] C130-D5h(1) fullertubes. This achievement represents the largest soluble carbon molecule obtained in its pristine form. The [5,5] C130 species is the highest aspect ... -
Covalently crosslinked mussel byssus protein-based materials with tunable properties
(Wiley, 2018-03-01)Mussels’ anchoring threads, named byssus, are collagen-rich fibers with outstanding mechanical properties. Our previous work has shown the possibility of producing a byssus protein hydrolyzate with good film-forming ability, providing a promising new ... -
Detection and characterization of ZnO nanoparticles in surface and waste waters using single particle ICPMS
(American Chemical Society, 2015-04-29)The increasing production of ZnO nanoparticles (nZnO) makes their analysis and characterization extremely important from an ecological risk perspective, especially at the low concentrations at which they are expected to be found in natural waters. ... -
Development of an LC-MS-based method to study the fate of nanoencapsulated pesticides in soils and strawberry plant
(Elsevier, 2021-12-04)The increased production and use of nanopesticides will increase the likelihood of their exposure to humans and the environment. In order to properly evaluate their risk, it will be necessary to rigorously quantify their concentrations in major ... -
Distinguishing the effects of Ce nanoparticles from their dissolution products : identification of transcriptomic biomarkers that are specific for ionic Ce in Chlamydomonas reinhardtii
(Oxford University Press, 2020-12-11)Cerium (Ce) is a rare earth element that is incorporated in numerous consumer products, either in its cationic form or as engineered nanoparticles (ENPs). Given the propensity of small oxide particles to dissolve, it is unclear whether biological ... -
Effect of hydrogen-bond strength on photoresponsive properties of polymer-azobenzene complexes
(NRC Research Press & Canadian Society for Chemistry, 2020-04-16)Supramolecular complexation between photoresponsive azobenzene chromophores and a photopassive polymer host offers synthetic and design advantages compared with conventional covalent azo-containing polymers. In this context, it is important to understand ... -
Electronic absorption spectroscopy
(Elsevier, 2021)Absorption spectroscopy in the ultraviolet, visible and near-infrared (UV-VIS-NIR) wavelength ranges is one of the oldest and most often used characterization methods in coordination chemistry. This overview illustrates examples ranging from four-coordinate ... -
Electrospinning of highly crystalline polymers for strongly oriented fibers
(American Chemical Society, 2020-09-23)Electrospun nanofibers (NFs) often demonstrate an exponential increase in mechanical and other properties at reduced diameters. Molecular orientation emerges as a key parameter for the performance of amorphous and low crystallinity polymers, but ... -
Electrospun materials with high reflectance and polarization contrast for sensing applications in the mid-infrared atmospheric window
(American Chemical Society, 2024-06-06)Several applications in remote sensing and thermal management require materials with high reflectivity and polarization contrast in the mid-infrared (MIR) spectral range. However, the existing options often fall short in terms of mechanical properties ... -
Engineered robust hydrophobic/hydrophilic nanofibrous scaffolds with drug-eluting, antioxidant, and antimicrobial capacity
(American Chemical Society, 2024-05-22)Multifunctional nanofibrous architectures have attracted extensive attention for biomedical applications due to their adjustable and versatile properties. Electrospun fabrics stand out as key building blocks for these structures, yet improving their ... -
Eumelanin : from molecular state to film
(American Chemical Society, 2021-02-02)Eumelanin, a macromolecular biopigment, is an attractive candidate for sustainable (green) organic electronics. Establishing structure–property relationships in eumelanin films is an essential step to exploit its technological potential. We report on ... -
Eumelanin for nature-inspired UV-absorption enhancement of plastics
(Wiley, 2019-02-06)In the human body, the black-brown biopigment eumelanin blocks the harmful ultraviolet (UV) radiation. In the plastics industry, additives are often added to polymers to increase their UV-absorption properties. We herein report an assessment of the ... -
Field evaluation of the potential effects of polymer and silica-based nanopesticides on strawberries and agricultural soils
(Royal Society of Chemistry, 2022-08-18)Polymeric and SiO2 nanoparticles can be used as nanocarriers to improve the efficacy of pesticide delivery in agriculture. However, the environmental fate and potential risks of this type of nanopesticides in agroecosystems remain poorly understood. ... -
Glass engineering of aminotriazine-based materials with sub-ambient Tg and high kinetic stability
(Royal Society of Chemistry, 2020-06-08)A challenge in glass engineering is the design of molecular glasses combining a high glass kinetic stability (GS) of the amorphous phase with a low (sub‐ambient) glass transition temperature (Tg). Triazine derivatives ...
