title: An Exploration of the Metal Dependent Selectivity of a Metalloporphyrins Coated Quartz Microbalances Array.
abstract: Several studies in the last two decades have demonstrated that metalloporphyrins coated quartz microbalances can be fruitfully used in many diverse applications, spanning from medical diagnosis to environmental control. This large versatility is due to the combination of the ﬂexibility of metalloporphyrins molecular design with the independence of the quartz microbalance signal from the interaction mechanisms. The nature of the metal atom in the metalloporphyrins is often indicated as one of the most effective tools to design differently selective sensors. However, the properties of sensors are also strongly affected by the characteristics of the transducer. In this paper, the role of the metal atom is investigated studying the response, to various volatile compounds, of six quartz microbalance sensors that are based on the same porphyrin but with different metals. Results show that, since quartz microbalances (QMB) transducers can sense all the interactions between porphyrin and volatile compounds, the metal ion does not completely determine the sensor behaviour. Rather, the sensors based on the same molecular ring but with different metal ions show a non-negligible common behaviour. However, even if limited, the different metals still confer peculiar properties to the sensors and might drive the sensor array identiﬁcation of the pool of tested volatile compounds.
authors: Department of Electronic Engineering, University of Rome Tor Vergata, Via Politecnico 1, 00133 Roma, Italy. catini@ing.uniroma2.it.
authors: Alexandro
authors: A
authors: Catini
authors: Department of Electronic Engineering, University of Rome Tor Vergata, Via Politecnico 1, 00133 Roma, Italy. rajkumar.lmd@gmail.com.
authors: Raj
authors: R
authors: Kumar
authors: Department of Electronic Engineering, University of Rome Tor Vergata, Via Politecnico 1, 00133 Roma, Italy. capuano@ing.uniroma2.it.
authors: Rosamaria
authors: R
authors: Capuano
authors: Department of Electronic Engineering, University of Rome Tor Vergata, Via Politecnico 1, 00133 Roma, Italy. martinelli@ing.uniroma2.it.
authors: Eugenio
authors: E
authors: Martinelli
authors: Department of Chemical Science and Technology, University of Rome Tor Vergata, Via della Ricerca Scientiﬁca, 00133 Roma, Italy. roberto.paolesse@uniroma2.it.
authors: Roberto
authors: R
authors: Paolesse
authors: Department of Electronic Engineering, University of Rome Tor Vergata, Via Politecnico 1, 00133 Roma, Italy. dinatale@uniroma2.it.
authors: Corrado
authors: C
authors: di Natale
keywords: electronic nose; metalloporphyrins; quartz microbalance