Phthalocyanines as Sensitive Materials for Chemical Sensors

Synthesis, characterization, and electrocatalytic and electrical properties of novel ball-type four cyclopentyldisilanoxy-POSS bridged metallophthalocyanines

“…The Tafel slope and the corresponding an rds kinetic parameter, -100 mV/decade and 0.61 respectively, indicate the involvement of one-electron transfer in the rate determining step (rds) of ORR for the 5-based catalyst. On the basis of the combination of all the results of this study (SCV, RDE and RRDE), it is reasonable to propose two In pathway A, step (7) is not an elementary reaction since it is quite difficult for three electrons and three protons to meet together. It could involve several fast elementary reactions.…”

Noncovalent Functionalization of Single-Wall Carbon Nanotubes for the Elaboration of Gas Sensor Dedicated to BTX Type Gases: The Case of Toluene

“…This possibility will involve an electronic charge transfer between the toluene gaseous molecules and the CNTs through the MCs. Such a transfer had to be considered since MC layers used as sensing layers present measurable changes under gas action concomitant with a possible electronical connection (conductivity) through the stacking molecules …”

“…In the field of chemical sensors, phthalocyanines and porphyrins as well as their metal derivatives have been extensively used as sensing materials. − As shown in Figure a, upon toluene exposure, the QCM sensors made of CuPctBu and OEPH 2 present a frequency decrease (i.e., mass increase). According to our experiments, all MC-based QCM mass sensors show responses in the range 400–1200 ppm toluene.…”

“…Such a transfer had to be considered since MC layers used as sensing layers present measurable changes under gas action concomitant with a possible electronical connection (conductivity) through the stacking molecules. 48 In terms of sensing, the most shortcoming aspect is the very unsystematic way in which the responses are produced, as every author uses different parameters in their experiments. For a better comparison of the different sensing materials, the responses in frequency variation of the sensors have been normalized to a frequency variation per nanogram (Hz/ng) of deposited material.…”

Hydroxy-Terminated Organic Semiconductor-Based Field-Effect Transistors for Phosphonate Vapor Detection

“…The saturation source−drain current of this unfunctionalized sensor reached the minimum value after 40 min of exposure to DMMP vapor, during which time the DMMP concentration in the chamber was considered to have increased linearly to 75 ppm. The kinetics of the response are controlled by the evaporation rate of DMMP and slow diffusion rate of DMMP within the OSC film. , The adsorption of DMMP molecules on the unfunctionalized semiconductor organic film surface is probably a weak electrostatic force of the van der Waals type …”