Taking advantage of optical and electrical properties of organic molecules for gas sensing applications

Infrared spectroscopic investigation and semi-empirical modeling of the structure of an adsorption complex formed with a nitroxide radical with functional groups

“…The authors of Refs. [2][3][4][5][6] mention examples of the use of phthalocyanines and porphyrins as sensors for Cl 2 , NO 2 and NO. In our preliminary experiments [7], the search for selective receptors was carried out with the help of modeling of the adsorption complex (AC) with various gases (SO 2 , NO 2 , CO 2 , CO, H 2 S, H 2 O, NH 3 ).…”

Plasma Deposited Porphyrin/Phthalocyanine Films as Promising Optical Gas Sensing Materials

“…The absorption was measured at a wavelength of 568 nm and the response is reported as the ratio between the signal intensity I (the absorbance variation) and signal noise (N). These short times characterize both samples as fast sensing materials [6]; nevertheless it is worth to point out that the GDS sample shows sensing responses characterized by shorter response and recovery times than those of the SPIN one. 3 (right).…”

Growth, characterization and sensing capabilities of 5,10,15,20-meso-tetraphenyl iron (III) porphyrin chloride films obtained by means of a novel plasma-based deposition technique

“…Many authors have in past reported the requirement to heat porphyrin samples during the recovery phase, in order to obtain complete recovery in reasonable times [37,38]: nevertheless heating procedures, causing thermal cycles into the samples, can degrade the organic films.…”