The monomer MBPC was synthesized according to the reported procedures for 5, 5'-methylene bis (salicylaldehyde) and 5, 5'-methylene bis (2-hydro- xyacetophenone) [21-23].
The monomer MBPC exhibits good solubility in polar aprotic solvents, dimethylformamide (DMF) and dimethylsulphoxide (DMSO).
The FT-IR spectra of MBPC indicated strong bands at 1690 cm -1 and 1710 cm -1 due to n C=O stretching vibrations.
The monomer MBPC indicated three bands within 265-350 nm due to (Pi) - (Pi) transition within pyridyl rings and conjugated C=O groups.
A bathochromic shift 5-7nm in the first, second and third absorption bands of the polymer PMBPCPR, as compared to the monomer MBPC was observed.
The monomer MBPC indicated reduced viscosity ((Eta)red) within 0.
The absolute viscosity ((Eta) abs) for MBPC was in the range of 0.
Synthesis of the Monomer, MBPC, the polymer PMBPCPR and of the Polymer metal complexesPMBPCPRCuand PMBPCPRNi is outlined inScheme-1
A nao adesao as medidas de precaucao padrao pelos profissionais, seja por desconhecimento ou negligencia, pode configurar uma maior exposicao destes ao MBPC
, aumentando a chance de contaminacao dos mesmos por micro-organismos potencialmente causadores de infeccoes o que, consequentemente, pode acarretar em ausencias ao trabalho, temporarias ou permanentes, como licencas medicas e ate casos de invalidez (5).