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DTSTAMP:20260415T080128
DTSTART:20140627T143000
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20140627T160000
URL:https://murmitoyen.com/events/vanille/udem/detail/407071
LOCATION:Université de Montréal - Pavillon Claire-McNicoll\, 2900\, chemi
 n de la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:Conférence avec le Professeur Alberto Credi (Bologna)
DESCRIPTION:Titre : Photoactive Molecular Devices\, Machines and Materials.
 Cette conférence sera prononcée (en anglais) par le Professeur Alberto 
 Credi\, du département de chimie de l'Università di Bologna (Italy).Rés
 umé : Miniaturization has been an essential ingredient in the outstanding
  progress of information technology over the past fifty years. The next\, 
 perhaps ultimate\, limit of miniaturization is that of molecules\, which a
 re the smallest entities with definite and programmable size\, shape\, and
  properties. Molecular-level systems that respond to external stimulation 
 by changing some physical or chemical properties can be viewed as input-ou
 tput devices and therefore may be useful for gathering\, transferring\, pr
 ocessing\, and storing information. Some of these nanoscale devices can\, 
 in fact\, perform logic operations of remarkable complexity. This research
  - although still far from being transferred into technology - is attracti
 ng interest\, since the nanometer realm seems tobe out of reach for the 't
 op-down' techniques currently available to the microelectronics industry.A
 mong the examined systems are molecular switches\, sensors\, wires\, plug/
 socket devices\, extension cables\, memories\, and combinational and seque
 ntial logic circuits. These functionalities are implemented using a large 
 variety of chemical species\, from unsophisticated molecules to transition
 -metal complexes\, supramolecular assemblies and molecule-nanocrystal hybr
 ids. Particular attention is devoted to the concepts of logic superpositio
 n and reconfiguration\, which can lead to a substantial degree of function
 al integration. We are also interested at developing strategies for the se
 rial connection (cascading) of distinct molecular logic systems.We are int
 erested in the design\, synthesis and study of multicomponent species (in 
 most cases interlocked compounds such as rotaxanes\, catenanes and related
  species) capable of performing mechanical motions of their molecular comp
 onents in response to external stimulation (addition of chemical reactants
 \, application of electric potentials\, light irradiation). We have invest
 igated examples of pH-driven and sunlight-powered molecular shuttles\, mol
 ecular elevators\, and catenane rotary devices. An important scientific ob
 jective of this research is to gain a deep understanding on the operating 
 mechanisms of such systems\, thereby learning how to design new prototypes
  with novel functionalities and/or improved performance. The final aim is 
 the construction of mechanical nanodevices that can carry out useful funct
 ions such as memorizing/processing information in binary form\, control of
  membrane permeability\, uptake and release of other molecules\, up to mec
 hanical actuation on the micro- and macroscopic scales (molecular muscles)
 .Information supplémentaire
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