Volatolomics in Fritillarias and Their Identification by Orientation
Controlled cMOF Thin Film Chemiresistors
Abstract
As one of the famous traditional Chinese herbal medicines, Fritillariae
Cirrhosae Bulbus (FCB) is widely used in the prevention and treatment of
respiratory diseases and has best curative effect among the known
fritillarias medicinal. Due to the variety, complex sources, similar
appearance and shape, it is difficult to distinguish FCB with high
curative effect (h-FCB) from other common fritillarias (c-FCB) in the
market. In this paper, a very simple chemiresistor is used to identify
FCB from three commonly used fritillarias drugs. The sensors are
fabricated by anisotropic electrically conductive Metal-organic
framework (cMOF) thin film Cu3(HHTP)2 (Cu-HHTP[001] and
Cu-HHTP[100]) as active materials owing to their ability to detect
specific groups of volatile organic compounds (volatolomics) as the
functional motifs of chemiresistor. As a result, the sensors show
orientation-dependence identification ability to FCB.
Cu-HHTP[001]-based sensor shows the highest response (344.17%) to
0.5 g h-FCB powder volatiles among its three other c-FCB which is much
higher than Cu-HHTP[100] (135.50%). Ultimately, Cu-HHTP[001]
can realize the identification of FCB with an accuracy of 97.2% in a
simple and real-time manner.