[Todos] Seminario de la Prof. Luisa De Cola Hoy en INQUIMAE

[Prof. Ernesto Julio Calvo]

Se invita a todos al Seminario Especial que dara 
hoy la Prof. Luisa De Cola de la Universidad de Munster en Alemania

http://www.uni-muenster.de/Physik.PI/DeCola/ldc_cv.html



Luminescent soft and hard assemblies
Dr. Luisa De Cola
Physikalisches Institut, and CeNTech, University of Münster,
Muenster (decola en uni-muenster.de)
Aula 3er. piso DQIAyQF/INQUIMAE
Hoy, martes 24 de Mayo a las 13 hs.
Resumen
Electroluminescent metal complexes have been 
widely investigated for their potential use as 
dopant in Organig Light Emitting Devices, OLEDs, 
and when charged in Light Emitting 
Electrochemical Cells, LEECs. In this we will 
discuss the formation of soft [1,2] and hard 
crystalline luminescent systems [3-5]. Tuning the 
design of the metal complexes based mainly on 
iridium and platinum metal ions and containing 
phenylpyridine, pyridine, and pyridine azoles, or 
dinegative tridentate N-N-N ligands we are able 
to control the degree of intermolecular 
interactions leading to the formation of fibers 
and gels, or crystalline materials. In particular 
the possibility to promote aggregation and the 
new emission properties rising from the formation 
of the assemblies, such as enhancement of the emission,
will be discussed in two examples. A 
non-luminescent platinum complex, becoming 
extremely emitting (90% emission quantum yields) upon
aggregation, is described. The Pt(II) complex can 
assemble in fibers or even form luminescent gels. 
The material has been used to construct
electroluminescent devices [1]. The aggregation 
can also be prevented and other neutral Pt(II) 
complexes have been prepared and used for OLED 
materials. Finally crystalline iridium complexes 
(left figure) will be discussed and porous 
structures have been obtained with some of them. 
In particular, in one of the described systems, 
two luminescent iridium complexes, possessing 
different emission colors, and complementary 
charges are employed to form complex salts and 
non covalent linked crystalline porous photo- and 
electroactive framework [3]. The strategy 
described can be extended to many photo- and 
electroresponsive ionic transition metal 
complexes and could constitute the future 
generation of organometallic zeolite-like 
structures. The modulation of their properties 
with appropriate guests will be then discussed.

[1] C. A. Strassert, C.-H. Chien, M. D. Galvez 
Lopez, D. Kourkoulos, D. Hertel, K. Meerholz, L. 
De Cola Angew. Chem. Int. Ed., 2011, 50, 946.
[2] M. Mydlak, M. Mauro, F. Polo, M. Felicetti, J. Leonhardt, G. Diener,
L. De Cola, C.A. Strassert submitted.
[3] M. Mauro, K. C. Schuermann, R. Prétôt, A. Hafner, P. Mercandelli, A.
Sironi, L. De Cola Angew. Chem. Int. Ed., 2010, 49, 1222.
[4] N. Darmawan, R. Fröhlich, L. De Cola, submitted.
[5] E. Quartapelle Procopio, M. Mauro, M. Panigati, D. Donghi, P.
Mercandelli, A. Sironi, G. D´Alfonso, L. De Cola J. Am. Chem. Soc., 2010,
132, 14397.


Prof. Ernesto J. Calvo, FRSC
Electrochemistry Group, INQUIMAE
Departamento de Quimica Inorganica, Analitica y Quimica Fisica. Facultad
de Ciencias Exactas y Naturales
Pabellon 2, Ciudad Universitaria, AR-1428 Buenos Aires, Argentina
Tel. 5411-4576-3378/80 ext. 120
Fax. 5411-4576-3341
www.qi.fcen.uba.ar/grupos/laboeq 
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