| Summary: | This research is focused on a synthesis of copper-cellulose phosphates antimicrobial complexes. Vapor-phase phosphorylations of cellulose were achieved by exposing microcrystalline cellulose to phosphorus trichloride (PCl<sub>3</sub>) vapors. The cellulose-<i>O</i>-dichlorophosphines (Cell-<i>O</i>-PCl<sub>2</sub>) formed were hydrolyzed to cellulose-<i>O</i>-hydrogenphosphate (P(III)) (Cell-<i>O</i>-P(O)(H)(OH)), which, in turn, were converted into corresponding copper(II) complexes (Cell-<i>O</i>-P(O)(H)(OH)∙Cu<sup>2+</sup>). The analysis of the complexes Cell-<i>O</i>-P(O)(H)(OH)∙Cu<sup>2+</sup> covered: scanning electron microscopy (SEM), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), atomic absorption spectrometry with flame excitation (FAAS), and bioactivity tests against representative Gram-negative bacteria (<i>Escherichia coli</i>) and Gram-positive bacteria (<i>Staphylococcus aureus</i>). The antimicrobial tests of synthesized Cell-<i>O</i>-P(O)(H)(OH)∙Cu<sup>2+</sup> revealed their potential applications as an antibacterial material.
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