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, L., Paris, A., Mastroianni, M., Pomarico, G., Santonico, M., Pennazza, G., Di Natale, C., Paolesse, R., D'Amico, A.. - In: PROCEDIA ENGINEERING. - ISSN 1877-7058. - 5:(2010), pp. 1043-1046. (24th Eurosensors Conference 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.
