Optical sensing properties of CoTPP thin films deposited by glow-discharge-induced sublimation

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

“…The B and Q bands both arise from -* transitions and can be explained by considering the "Gouterman four orbital model" [30]. The presence of the characteristic Fe(TPP)Cl optical B and Q bands into the GDS and SPIN films clearly indicates the presence of integer molecules into both the solid films: this experimental evidence, in well agreement with other literature data [22,27], is particularly important for the GDS samples pointing out the absence of molecular iron decomplexation effects into the produced films.…”

“…GDS has in past demonstrated to be a suitable technique for the deposition of a wide range of organic materials going from polymers to fluorescent dyes [23][24][25], moreover; GDS has recently showed to be a promising technique for the production of organic films for gas sensing applications, allowing to produce organic films characterized both by high purity and by a large surface area to volume ratio [26][27][28]. Fe(TPP)Cl films have been also deposited by means of spin coating (SPIN) technique, which represents a standard technique for the production of porphyrin films for gas sensing applications [20,29], in order to get a reference for evaluating the sensing capabilities of GDS films.…”

Chemsensor of NO2 gas based on porphyrin of 5, 10, 15, 20-tetraphenylporphyrin LB films and LS films

“…These sensors reliant on changes in the optical properties of the active sensing material, generally operate at room temperature and remain relatively immune to interference effects 5 . The optical responses toward alcohol vapors of H 2 TPP and its derivatives suggested different molecule organization between spin coated and vacuum evaporation technique thin films 6 . Hence, supramolecular assemblies of porphyrins have been extensively studied for two main kinds of applications: for mimicking natural photosynthesis process and as components in molecular devices.…”

The interaction between the gas sensing and surface morphology properties of LB thin films of porphyrins in terms of the adsorption kinetics

“…They found that the LB porphyrin thin films during interaction with NO 2 gas obey the Elovichian model. Tonezzer et al [3] also showed that this model is also applicable to vacuum evaporated porphyrin thin films in exposure to some alcohol vapors. The BrunauereEmmetteTeller (BET) model depicts different energetic states that can be described in two stages: a fast and linear increase in response for the low concentration of toxic gas and a saturating response with increasing concentration of the toxic gas, pointing out the multilayer structure of the thin film.…”