Robust optical oxygen sensors based on polymer-bound NIR-emitting platinum(II)-benzoporphyrins was written by Hutter, L. H.;Muller, B. J.;Koren, K.;Borisov, S. M.;Klimant, I.. And the article was included in Journal of Materials Chemistry in 2014.Category: esters-buliding-blocks The following contents are mentioned in the article:
Several advanced optical oxygen sensor materials are presented. They are based on bright NIR-emitting platinum(II)-benzoporphyrins covalently incorporated into a variety of polymeric matrixes. The dye-polymer conjugates are prepared either via Suzuki coupling of the brominated porphyrins to the styrene backbone or via co-polymerization of the monomers with monostyryl porphyrin derivative Importantly, in both strategies a highly stable C-C bond is obtained. The resulted materials benefit from excellent photophys. properties of the benzoporphyrin dyes (high brightness, emission in the NIR part of the spectrum) and high stability of the covalently grafted materials due to complete suppression of dye migration and leaching. This is particularly important for operation of the sensors in harsh conditions e.g. during steam sterilization where the materials based on noncovalently grafted dyes showed significant drift of their calibration. Addnl., the authors present a new synthetic method for preparation of anal. pure benzoporphyrins via simple 1-step template condensation which a promising alternative to the commonly used Lindsey method. This study involved multiple reactions and reactants, such as 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3Category: esters-buliding-blocks).
1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Category: esters-buliding-blocks
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics