The sensitivity, selectivity and dynamic response of SAW chemosensors coated with cavitands and amorphous polymers was studied with alkanes, polychlorinated alkanes (and alkenes) and substituted benzenes. While showing a remarkable sensitivity, the rigid mol. structure of one of the cavitands prevents its use in practical sensors, due to a slow dynamic response. Addn. of alkane chains improves the speed of response at the expense of both sensitivity and selectivity. No cavity effect could be deduced. Sensitivity scaled up with the b.ps. of the analytes, revealing a simple dissoln. process. Selectivity was governed by the chem. compn. of the coating and not by the mere presence of the cavity. The speed of response was governed by the molar volume of the analytes.
On the origin of selectivity and sensitivity in SAW chemosensors based on cavitands / J., Greenblatt; J. N., Kaushansky; Z., Liron; Dalcanale, Enrico. - 97-19:(1997), pp. 141-148. (Intervento presentato al convegno 192th ECS Meeting tenutosi a Parigi).
On the origin of selectivity and sensitivity in SAW chemosensors based on cavitands
DALCANALE, Enrico
1997-01-01
Abstract
The sensitivity, selectivity and dynamic response of SAW chemosensors coated with cavitands and amorphous polymers was studied with alkanes, polychlorinated alkanes (and alkenes) and substituted benzenes. While showing a remarkable sensitivity, the rigid mol. structure of one of the cavitands prevents its use in practical sensors, due to a slow dynamic response. Addn. of alkane chains improves the speed of response at the expense of both sensitivity and selectivity. No cavity effect could be deduced. Sensitivity scaled up with the b.ps. of the analytes, revealing a simple dissoln. process. Selectivity was governed by the chem. compn. of the coating and not by the mere presence of the cavity. The speed of response was governed by the molar volume of the analytes.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
