ABSTRACT INFORMATION FORM
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Title (Delete the unnecessary): Prof.
Family Name: Gobetto First Name(s): Roberto Institution: Department of Chemistry, University of Torino_ Mailing Address: Via P. Giuria n° 7
City: Torino Zip Code: 10125 Country: Italy
Tel +39 011 6707520 Fax 011 6707855 E-mail roberto.gobetto@unito.it
Abstract Title
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Choice of presentation Poster presentation
Photo- and Electro-Chemical Reduction of CO
2by Re(CO)
3Carbonyl
Complexes Containing Fluorescent 4-piperidinyl-1,8-naphthalimide
Roberto Gobetto, Carlo Nervi, Federico Franco, Claudio Cometto, Cunfa Sun, Luca Nencini, Fabrizio Sordello, Claudio Garino, Claudio Minero
Department of Chemistry and NIS, University of Turin, via P. Giuria 7, 10125 Torino, Italy
e-mail: roberto.gobetto@unito.it
The effect of the highly fluorescent PNI (4-piperidinyl-1,8-naphthalimide) chromophore on
the CO2 reduction catalytic properties of Rhenium based catalysts was investigated. In particular,
the electro- and photocatalytic CO2 reduction properties of Re(CO)3(2,2’-bipyridine)Cl were
compared with the activity of Re(CO)3(phen-PNI)Cl, already known in the literature for its
long-lived excited state lifetime. Moreover two novel Re complexes, namely Re(CO)3(bpy-Ph-NH2)Cl
and Re(CO)3(bpy-Ph-PNI)Cl were synthesized and tested as electro- and photocatalysts. The
catalytic properties of the selected compounds were studied by means of electrochemical (cyclic voltammetry and controlled-potential electrolysis) and photophysical measurements, together with DFT calculations. Bulk electrolysis experiments revealed that, among the complexes under
investigation, Re(CO)3(bpy-Ph-PNI)Cl showed good electrocatalytic efficiency toward selective
CO2 reduction to CO, as reported below (Fig. 1). In particular, this novel organometallic sample
revealed to have longer activity over electrolysis time than the reference compound, reaching a
Turnover Number of about 50 after 8 hours of experiments, in the presence of 0.5 M CH3OH as
external proton source.
Fig. 1. Activities, in terms of Turnover Number (TON) over electrolysis time, for the compounds 1 (orange), 2 (black), 3 (yellow) and 4 (blue).
Acknowledgements: This work has been funded by the PHOTORECARB project (Compagnia di San Paolo and
