Université de Fribourg

N-Nitrosamine-{cis--Re[CO]₂}²⁺ cobalamin conjugates as mixed CO/NO-releasing molecules

Santoro, Giuseppe ; Beltrami, Ruben ; Kottela, Emmanuel ; Blacque, Olivier ; Bogdanova, Anna Yu. ; Zobi, Fabio

In: Dalton Transactions, 2016, vol. 45, no. 4, p. 1504–1513

Mixed CO/NO-releasing molecules were prepared by conjugation of the 17-electron rhenium dicarbonyl cis-[Re(CO)₂Br₄]²⁻ complex to N-nitrosamine modified cyanocobalamin (B12) bio-vectors. The species were fully characterized by standard analytical techniques, including X-ray crystallography for cyanocobalamin-5′-O-pyrazine and (1) and its...

Université de Fribourg

Setup of galvanic sensors for the monitoring of gilded bronzes

Goidanich, Sara ; Gulotta, Davide ; Brambilla, Laura ; Beltrami, Ruben ; Fermo, Paola ; Toniolo, Lucia

In: Sensors, 2014, vol. 14, no. 4, p. 7066–7083

Traditional electrochemical techniques, such as linear polarization resistance (Rp), and electrochemical impedance spectroscopy (EIS), cannot be applied to gilded bronzes, as it may not be possible to interpret the results obtained due to the bimetallic nature of the studied material. The measurement of the macrocouple current generated by the gold/bronze galvanic couple can be used as an...