Pyrene-bonded film

Photo-oxidation of LCV by the Pyrene-Bonded Film. The surface properties and structure of these systems should be related to the sensitizer efficiency of pyrenyl groups. Pyrene is a good sensitizer for the oxidative color formation of LCV. The singlet excited state of Py acts as an electron acceptor bringing about one electron oxidation of LCV+. The unit processes are considered as... 

In this work we utilized FTIR methods to examine the SA monolayers on flat, polar solid surfaces prepared from nonpolar solutions. We used ATR and GI FTIR measurements to characterize the material and bonding of the S A monolayers, and used transmission and ATR FTIR to monitor the dynamics of the SA adsorption process. With reference to measurements on standard Langmuir-Blodgett monolayer samples, we were able to quantify the S A kinetic results. We also used fluorescence spectroscopy of incorporated pyrene probes in S A mixed monolayer films as a simple method for the determination of the relative adsorption and thermodynamic constants. 

The pyrene-labeled polyethylene film 1 contains a weakly acidic C-H bond (highlighted H) that can be converted into a lithiated initiator on treatment with a... 

Penetration of light. Poly(methyl methacrylate) film doped with a high concentration of pyrene shows well defined ablation. Small curd-like particles are observed for a film with a low dopant concentration. The origin of these particles can be explained by the low density and inhomo-genous distribution of bond scission in the polymer subsurface during ablative photodecomposition with an increase in beam penetration [1417]. 

Due to the rather indiscriminate mode of initial interaction of ionizing radiation with matter and the much higher population of CH or CC bonds of the alkane chains of the solvent matrix (than pyrene molecules), the primary loci of energy deposition for secondary radiation evolved from x-rays or MeV range protons reside in the solvent. In principle, therefore, attachment can occur without formation of PyH , PyH (steps 8 through 11 in Scheme 2), or any other pyrene-based excited states step 18 of Scheme 3 is a mechanistic departure point when films are bombarded by ionizing radiation. However, there is strong experimental evidence to support step 18, also. ... 

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