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. 2013 May 7;13(5):5841-56.
doi: 10.3390/s130505841.

A ferrocene-porphyrin ligand for multi-transduction chemical sensor development

Larisa Lvova  1 , Pierluca Galloni, Barbara Floris, Ingemar Lundström, Roberto Paolesse, Corrado Di Natale
Affiliations

A ferrocene-porphyrin ligand for multi-transduction chemical sensor development

Larisa Lvova et al. Sensors (Basel). .

Abstract

5,10,15,20-Tetraferrocenyl porphyrin, H2TFcP, a simple example of a donor-acceptor system, was tested as ligand for the development of a novel multi-transduction chemical sensors aimed at the determination of transition metal ions. The fluorescence energy transfer between ferrocene donor and porphyrin acceptor sub-units was considered. The simultaneously measured optical and potentiometric responses of solvent polymeric membranes based on H2TFcP permitted the detection of lead ions in sample solutions, in the concentration range from 2.7 × 10(-7) to 3.0 × 10(-3) M. The detection limit of lead determination was 0.27 μM, low enough to perform the direct analysis of Pb2+ in natural waters.

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Figures

Figure 1.
Figure 1.
(a) Chemical structure of free-base meso-tetraferrocene porphyrin, H2TFcP; (b) energy level diagram showing possible photochemical events in porphyrin-ferrocene in contact with a conducting transducer M and solution containing an electron acceptor A.
Figure 2.
Figure 2.
The fluorescence quenching of H2TFcP by addition of growing concentrations of (a) Cu2+ and (b) Pb2+ ions.
Figure 3.
Figure 3.
CVs of H2TFcP in: (a) CH2Cl2 and DMF solvents; (b) in aqueous solutions upon exposure to growing concentrations of Pb2+-ions.
Figure 4.
Figure 4.
CSPT response of solvent polymeric membranes to several metal ions: (a) Mb1: PVC/DOS/H2TFcP 1wt%; (b) Mb2: PVC/DOS/H2TFcP 1wt%/ TpClPBK 0.25wt%; (c) Mb3: PVC/DOS/H2TFcP 1wt%/ TpClPBK 0.4wt%.
Figure 4.
Figure 4.
CSPT response of solvent polymeric membranes to several metal ions: (a) Mb1: PVC/DOS/H2TFcP 1wt%; (b) Mb2: PVC/DOS/H2TFcP 1wt%/ TpClPBK 0.25wt%; (c) Mb3: PVC/DOS/H2TFcP 1wt%/ TpClPBK 0.4wt%.
Figure 5.
Figure 5.
PCA analysis of metal ions with opto-potentiometric Mb1–Mb3 based on H2TFcP.
See this image and copyright information in PMC

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