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Dynamic Surface Plasmon Resonance Experimental Set-up Realised to Study the Interaction Mechanism Taking Place in Gas or Liquid Phase by Images
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Optical characterization and analysis of the gas/surface adsorption phenomena on phthalocyanines thin films for gas sensing application
No full textZn(II) tetra-4-(2,4-di-t-amylphenoxy)-phthalocyanine (1a), Zn(II) tris-(2,4-di-t-amylphenoxy)-[4-(4-mercapto-phenylimino-methyl)-
phenoxy] (1b) and Zn(II) tris-(2,4-di-t-amylphenoxy)-[4-(4-formyl)-phenoxy] (1c) phthalocyanine were synthesized. The molecular structures
were confirmed by LC–MS, 1H NMR, FT-IR and UV–vis spectra. Spin coated layers of these phthalocyanines have been used as optochemically
interactive materials for the detection of volatile organic compounds (VOCs) in the UV–vis spectral range. An optical characterization
in controlled atmosphere have been carried out by acquiring the absorption spectra of the phthalocyanine complexes both in dry-air and in the
presence of different volatile organic compounds in order to study the optical sensing properties of these thin organic layers towards specific
volatile organic compounds. The optical absorption spectra have been analyzed by using a deconvolution analysis centered on the Q and Soret
bands. The results of the optical VOCs sensing tests showed interesting differentiation in the optical responses depending on the peripheral
substituents of the macromolecules. Morphologic analyses were performed by atomic force microscopy (AFM). The VOC/surface absorption
processes were also analyzed in order to understand the VOC-detection mechanisms
Compositional and optical characterization of rf sputter deposited TeOx thin films for optical disk application
No full textStructural study of meso-octaethylcalix[4]pyrrole Langmuir-Blodgett films used as gas sensors
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