M1 Nanosciences
16 pages
English

M1 Nanosciences

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Description

Niveau: Supérieur, Master, Bac+4
104/03/2008 M1-Nanosciences Supramolecular Chemistry for Nanosciences Guy Royal & L. P. Lévy

  • ion-dipole

  • stacking interactions ?

  • equilibrium can

  • nobel prize

  • der walls

  • bonding ? pi?pi

  • host-guest complex

  • coordination bonds


Sujets

Informations

Publié par
Publié le 01 mars 2008
Nombre de lectures 7
Langue English
Poids de l'ouvrage 2 Mo
Supramolecular C hemi s try for Nanosci e nces
04/03/2008
Guy Royal & L. P. Lévy
M 1 -Nanos ci en c e s
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     
Jean-Marie Lehn
04/03/2008
1987 Nobel prize to:
Donald J. Cram Jean-Marie Lehn Charles J. Pedersen
For their development of the field of supramolecular chemistry
M 1 -Nanos ci en c e s
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       
H o st-Guest c h e m i stry
+
Selective
Host-Guest complex (Supramolecule)
molecular recognition
Non-Covalent interactions are involved
Host molecule (Receptor) Guest molecules (Substrate) Hydrogen bonding ϑ%ϑ Stacking interactions Electrostactic interactions (ion-ion, ion-dipole, dipole-dipole) Van der Walls forces Hydrophobic/solvatophobic interactions Coordination bonds (Metal-donor bonds) M 1 -Nanos ci en c e s
04/03/2008
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    
H o st-Guest c h e m i stry
+
Host molecule (Receptor) Guest molecules (Substrate)
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O O O O O O [18]Crown-6
K +
Selective
M 1 -Nanos ci en c e s
Host-Guest complex (Supramolecule) molecular recognition
O O O K + O O O
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    
H o st-Guest c h e m i stry
+
Host molecule (Receptor) Guest molecules (Substrate)
Selective
Reversibility
Host-Guest complex (Supramolecule)
molecular recognition
Reversibility: - The thermodynamic equilibrium can be reached - Dynamic architectures - Change in constitution, shape, properties… - Capacity of error correction (not available for fully covalent systems)
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M 1 -Nanos ci en c e s
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    
      
Shape, size, proper ti e s (chemical, photochemical, redox, …)
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 
M 1 -Nanos ci en c e s


       

6
  
 
Fe
04/03/
O O O O O O N N
   

"Building blocks": -Complexing molecules -Redox units -Photosensitive molecules -Conjugated or saturated molecules -Carbon nanotubes, fullerenes… R -Molecules that can be attached onto a surface -…
From very simple to very complex… Only limited by imagination and… organic synthesis !!
M 1 -Nanos ci en c e s
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    
Fe
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O O O O O O
   
N N 
Light absorbed OOO N O O
No Light emitted
Self R assembly
O Light absorbed O O O
Light emitted M 1 -Nanos ci en c e s
P h o t o ch emi ca l sensing a nd  dete c t i on
A. P. De Silva, S. A. De Silva, J. Chem. Soc, Chem. Commun ., 1986 , 1709
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N N Zn N N
      
R
  
R
N N Zn F N N e G R'NH R HNR' R Gues ecies NN e (neutraltsmpolecule) R F R Zn NN
N N Zn N N
Fe
NH
G R NN Zn NN
self-assembly
Fe
N H
R Dynamic system R Supramolecular structure Application: electrochemical detection of guest molecules 04/03/2008 (dimer) C. Buche M r 1 , -C N . a  n H o . s c D i e n v c il e l s ers, J.-C. Moutet, G. Royal, E. Saint-Aman. 9 Chem. Commun., 2003 , 888-889.
  
Cyclodextrins HOO O OH O HO OH O HO HO HO O OHO Lipophilic OOH HO cavity OH OOH OH OH O HO OH O HO O O OH Hydrophilic periphery
=
H 3 COSO NH N OOH
NH O O NH 2 N N H 2 N N N O OHNNHN N O O H 2 N
Solubilization of R. Breslow, Acc. Chem. Res. 1995 , 28 , 146 organic compounds Y. Fukazawa et al ., Tetrahedron. Lett., 2001 , 42 , 3203 (drugs…) in w M a 1 t -e N r anos ci e J n . c T e . s Rademacher, C. Czarnick, JACS , 1993 , 3 1 0 0 18
04/03/2008
 
 

R
Ordered Self-Assembled Monolayer (SAM)
Modification of surfaces
New materials
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