XIV
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International Conference on Molecular Spectroscopy, Białka Tatrzańska 2017
26
I–8
Donor-acceptor systems of porphyrin-like chromophores with quantum
dot and fullerene
Danuta Wróbel
1
,
Bartosz Bursa
1
, and Bolesław Barszcz
1
1
Institute of Physics, Poznan University of Technology, Piotrowo 3, Poznan, Poland,
e-mail: danuta.wrobel@put.poznan.pl
The study concerns photophysical properties of metal phthtalocyanines and corroles and as
well of systems with a semiconductor quantum dot (QD-CdSe/ZnS) and a corrole-fullerene
(C60). The spectroscopic investigations were done both in organic solutions and in a form of
Langmuir and Langmuir-Blodgett molecular layers in the ultraviolet, visible and infrared ranges.
The fluorescence study and fluorescence kinetics showed strong interaction between
chromophores and C60 or QD and clearly demonstrated a strong donor-acceptor nature of the
metal phthalocyanines-quantum dot system (ZnPc-tetr-CdSe/ZnS) and the corrole-fullerene C60
dyad. Moreover, the spectroscopic studies in polarized light let to determine orientation of the
chromophore molecules in the Langmuir-Blodgett layers. The computer calculation (with the
use TD-DFT) confirmed the experimental results, in particular the redistribution of the π
electrons in the excited state and the location of the HOMO and LUMO levels. The cyclic
voltammetry investigations confirmed experimental spectroscopic results.
The results presented in this contribution gives a new opportunity using presented
photoactive molecular systems in different areas of optoelectronics and in the process of
converting energy of visible light into electricity in solar cells.
Fig. 1. Model of π- electron distribution in corrole (A) and corrole-fullerene dyad (B).
Keywords: metal phthtalocyanines; corroles; fullerene C60; semiconductor quantum dot CdSe/ZnS;
Langmuir-Blodgett layers; spectroscopy; TD-DFT calculation; cyclic voltammetry
Acknowledgment
The paper is supported by Poznan University of Technology, grant 06/62/DSPB/2171.
References
[1] D. Wróbel, A. Graja, Coordin. Chem. Rev. 255 (2011) 2555.
[2] B. Bursa, A. Biadasz, K. Kędzierski, D. Wróbel, J. Lum. 145 (2014) 779.
[3] B. Bursa, D. Wróbel, A. Biadasz, K. Kędzierski, K. Lewandowska, A. Graja, M. Szybowicz, M.
Durmuş, Spectrochim. Acta A 128 (2014) 489.
[4] B. Bursa, PhD thesis, Poznan University of Technology, Poznań, 2016.
XIV
h
International Conference on Molecular Spectroscopy, Białka Tatrzańska 2017
27
I–9
Fascinating linear and nonlinear optical properties of atomically
precise "molecular-like" metal nanoclusters
Rodolphe Antoine
1
1
Institut Lumière Matière, CNRS et Université Lyon 1, Lyon, France,
e-mail: rodolphe.antoine@univ-lyon1.fr
Metallic quantum clusters belonging to intermediate size regime between two and few
hundred of atoms, represent unique building blocks of new materials. Nonlinear optical (NLO)
characteristics of liganded silver and gold quantum clusters reveal remarkable features which
can be tuned by size, structure and composition. The two-photon absorption cross sections of
liganded noble metal quantum clusters are several orders of magnitude larger than that of
commercially-available dyes. Therefore, the fundamental photophysical understanding of those
two-photon processes in liganded clusters with few metal atoms deserve special attention, in
particularly in context of finding the mechanisms responsible for these properties. The
theoretical models and corresponding approaches are used allowing to explain the experimental
observations and simultaneously offering the possibility to deduce the key factors necessary to
design new classes of nanoclusters with large NLO properties. Additionally, selected studied
cases of liganded silver and gold quantum clusters with focus on their NLO properties will be
presented as promising candidates for applications in imaging techniques such as fluorescence
microscopy or Second-Harmonic Generation microscopy.
References
[1] F. Bertorelle, et al., The Journal of Physical Chemistry Letters (2017) 1979.
[2] I. Russier-Antoine, et al., Nanoscale 9 (2017) 1221.
[3] I. Russier-Antoine, F. Bertorelle, R. Hamouda, D. Rayane, P. Dugourd, Z. Sanader, V. Bonacic-
Koutecky, P.-F. Brevet, R. Antoine, Nanoscale 8 (2016) 2892.
[4] I. Russier-Antoine, F. Bertorelle, M. Vojkovic, D. Rayane, E. Salmon, C. Jonin, P. Dugourd, R.
Antoine, P.-F. Brevet, Nanoscale 6 (2014) 13572.
[5] Z. Sanader, M. Krstic, I. Russier-Antoine, F. Bertorelle, P. Dugourd, P.-F. Brevet, R. Antoine, V.
Bonacic-Koutecky, Phys. Chem. Chem. Phys. 18 (2016) 12404.
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