C. Heil et al., Highly selective sensor materials for discriminating carbonyl compounds inthe gas phase using quartz microbalances, SENS ACTU-B, 61(1-3), 1999, pp. 51-58
Host molecules of the dendrimer-type 1 and the oligolactam-type 2-4 are wel
l suited to act as highly selective sensor layers for carbonyl compounds wh
ich allow to discriminate individual aldehydes and ketones. The host/guest
effects are monitored via quartz microbalance (QMB). For this purpose, the
receptors 1-4 were coated onto a surface of the QMB. When these devices com
e into contact with carbonyl compounds in the gas phase, reproducible signa
ls are obtained within a short response time. Since the inclusion of the gu
ests into the host is reversible, these sensors can be used in continuous f
ashion. The three macrocycles 2-4 studied show different host/guest selecti
vity despite their similar cavity sizes. (C) 1999 Elsevier Science S.A. All
rights reserved.