In the present work the composites of the amide- and glycyl-functionalized porphyrin monomers and single wall carbon nanotubes (SWCNTs) were formulated and then applied as novel sensing materials in a quartz crystal microbalance (QMB) sensor array with an integrated preconcentration unit. Two strategies have been adopted for CNT-porphyrin composites design. In the first approach the electropolymerisation of pyrrole-substituted porphyrin monomers occurred via formation of conjugated positively charged polypyrrole backbone, while negatively charged CNT functionalized with carboxylic groups acted as a polymer dopants. In the second case the CNT-porphyrin composites were chemically synthesized via the amide bond formation between carboxylic groups of functionalized CNTs and amino-substituent of porphyrin or via interaction between glycyl-substituted porphyrin monomers and non-modified CNTs. The application of CNT-porphyrin composites permitted a substantial improvement of the signal to noise ratio and the possibility to measure several analytes odor threshold by QMB sensor array.
SWCNTs modified with porphyrin units for chemical sensing applications / Lvova, Larisa; Paris, A.; Mastroianni, Marco; Pomarico, Giuseppe; Santonico, Marco; Pennazza, Giorgio; Di Natale, Corrado; Paolesse, Roberto; D'Amico, Arnaldo. - In: PROCEDIA ENGINEERING. - ISSN 1877-7058. - 5:(2010), pp. 1043-1046. (Intervento presentato al convegno 24th Eurosensors Conference tenutosi a Linz, Austria) [10.1016/j.proeng.2010.09.288].
SWCNTs modified with porphyrin units for chemical sensing applications
Pomarico, Giuseppe;
2010
Abstract
In the present work the composites of the amide- and glycyl-functionalized porphyrin monomers and single wall carbon nanotubes (SWCNTs) were formulated and then applied as novel sensing materials in a quartz crystal microbalance (QMB) sensor array with an integrated preconcentration unit. Two strategies have been adopted for CNT-porphyrin composites design. In the first approach the electropolymerisation of pyrrole-substituted porphyrin monomers occurred via formation of conjugated positively charged polypyrrole backbone, while negatively charged CNT functionalized with carboxylic groups acted as a polymer dopants. In the second case the CNT-porphyrin composites were chemically synthesized via the amide bond formation between carboxylic groups of functionalized CNTs and amino-substituent of porphyrin or via interaction between glycyl-substituted porphyrin monomers and non-modified CNTs. The application of CNT-porphyrin composites permitted a substantial improvement of the signal to noise ratio and the possibility to measure several analytes odor threshold by QMB sensor array.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
