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KR: Fachgruppe Kristallographie
KR 10: Crystallography in Nanoscience (KR jointly with MI)
KR 10.1: Talk
Thursday, April 3, 2014, 11:00–11:15, CHE 184
Structure and dynamics of functional guest complexes in porous matrices — •Dominik Schaniel1, Kuan-Ying Hsieh1, El-Eulmi Bendeif1, Axel Gansmuller1, Sebastien Pillet1, and Theo Woike2 — 1Université de Lorraine, CRM2, UMR 7036, Vandoeuvre- les-Nancy — 2Institut für Strukturphysik, TU Dresden
The inclusion of functional molecules in nanostructured matrices is a very active field of research due to the potential applications of such hybrid materials, e.g. in optics, catalysis, or even medicine [1-4]. As a key to the understanding of the properties the structure of the host-guest system must be known.
We have synthesised such nanohybrids by encapsulation of photoswitchable complexes (Na2[(Fe(CN)5NO]2H2O, SNP) into porous silica matrices with different pore sizes from 1 nm to 20 nm. The structural study has been performed using total scattering methods coupled to pair distribution function analysis (PDF) and nuclear magnetic resonance (NMR). The PDF analysis allows for the determination of the structural arrangement of the isolated SNP complexes (cation- anion) as well as the size of the embedded cluster/nanoparticle. NMR reveals a dynamical behaviour of the guest complexes which depends on the hydration level of the matrix.
Sanchez et al., Adv. Mater. 2003, 15, 1669 ; Vinu et al., J. Nanosci. Nanotec. 2005, 5, 347.
[2] Deniz et al., Chem. Eur. J. 2012, 18, 15782.
[3] Blecher et al., Nanomedicine : Nanotechnology, Biology, and Medicine 2012, 8, 1364.
[4] T.-W. Sung, Y.-L. Lo, Sensors and Actuators B : Chemical 2012, 173, 406.