SYNTHESIS AND ELECTRICAL PROPERTIES OF COPOLYMERS CONTAINING 3-PHENYL[5]FERROCENOPHANE-1,5-DIMETHYLENE AND VINYLIMIDAZOLE

Ferrocene is a well-known organometallic compound and its structure consists of an iron atom sandwiched between two cyclopentadienyl rings. Ferrocene has unique properties such as redox chemistry, high electron density, thermal stability and aromaticity. In addition, the ferrocene can be incorporated into polymers either into the backbone or on the side chains. Ferrocene incorporated polymers have received considerable attention in the areas of electro-catalysis, electrode coating, and battery applications. Therefore, the main purpose of this study is to characterize the electrochemical behavior of copolymers of 3-phenyl[5]ferrocenophane-1,5-dimethylene with vinyl imidazole in aqueous solutions with various electrolytes: sodium perchlorate, zinc perchlorate, cadmium perchlorate, magnesium perchlorate, and lead perchlorate. Using a Wittig reaction, the 3-phenyl[5]ferrocenophane-1,5-dimethylene was synthesized from 3-phenyl[5]ferrocenophane-1,5-dione. Copolymerization with vinyl imidazole was achieved using AIBN as the initiator. The resulting polymers were characterized by FTIR, 1HNMR and 13CNMR. Cyclic voltammetry was performed in order to determine electrochemical response of each polymer. Finally, copolymers were investigated by UV-vis spectroscopy as solution in methylene chloride and as thin films to determine electronic communication between the ferrocene and imidazole moieties

Applying Best Practices for The Prevention of Surgical Site Infection (SSI) and Reducing Risk Factors for Patients: Meta-Analysis Theoretical Review

This study aimed at providing a comprehensive range of evidence-based recommendations for interventions to be applied during the pre-, intra- and postoperative periods for the prevention of the surgical site infection SSI, while also considering aspects related to resource availability and values and preferences. An initial search identified more than 200 titles published in 2006-2017 as relevant for data extraction, the researchers dealt with the extracted information included study design and methodology, reported cumulative incidence and post-surgical time until onset of SSI, and odds ratios and associated variability for all factors considered in univariate and/or multivariable analyses. And then the study recommended the best producers for reducing the risk factors for patients by conducting the findings of the meta-analysis theoretical review. Keywords: Surgical Site Infection, Risk Factors, Best Practices, Patient

Scramble-free synthesis of unhindered trans-A2B2-mesoaryl porphyrins via bromophenyl dipyrromethanes

Trans-disubstituted porphyrins are highly valuable intermediates across diverse fields, but they pose a significant synthesis challenge in some cases due to scrambling and formation of complex mixtures. Conditions that minimize scrambling also lower yields, but steric hindrance around the meso-aryl substituent can effectively suppress scrambling altogether. Here we report a straightforward approach to valuable trans-A2B2 porphyrin intermediates that are otherwise very difficult to obtain, through use of removable blocking bromide substituents