J. Sedlacek et al., POLYMERIZATION OF P-NITROPHENYLACETYLENE WITH METATHESIS CATALYSTS - PHOTOELECTRICAL PROPERTIES OF PHENYLACETYLENE P-NITROPHENYLACETYLENE COPOLYMER/, Macromolecular chemistry and physics, 199(1), 1998, pp. 155-161
Preparation of substituted acetylene polymers carrying nitro group is
reported for the first time. Homopolymers of p-nitrophenylacetylene (N
PA) and its copolymer with phenylacetylene (PA) have been prepared by
polymerizations induced by WOCl4/3Me(4)Sn as a catalyst in benzene and
benzene/dioxane as solvents. WOCl4 alone does not polymerize, oligome
rize and/or cyclotrimerize NPA. The two-component catalysts WOCl4/2Ph(
4)Sn and MoOCl4/3 Me4Sn produce low amounts of oligomers only. The hom
opolymer of NPA is insoluble, whereas the copolymer containing one NPA
unit per 4.38 units of PA is soluble in aromatic solvents and THE The
IR and NMR spectra of the homopolymer and the IR spectrum of the copo
lymer are reported. The photoconductive properties of the copolymer ar
e also reported and compared with those of poly(PA). Introduction of N
O2 groups onto polymer chains was found to increase the quantum effici
ency of charge carrier photogeneration but to deteriorate the charge c
arrier transport properties of the polymer.