ORGANOMETALLIC POLYMERS FROM N,N-DIETHYLPROPARGYLAMINE CONTAINING NI COORDINATION CENTERS

The reaction of N,N-diethylpropargylamine with increasing amounts of t he complex [Ni(NCS)(2)(PPh3)(2)] leads to pi-conjugated organometallic polymers containing Ni(II). XPS measurements show the presence of par amagnetic metal centers, which coordinate two NCS ligands, one phosphi ne and NEt2 pendant group of the polyenic chain. The number of Ni-bond ed atoms increases by increasing the complex/monomer molar ratio. The organometallic polymers are promising materials for humidity sensors, giving reproducible results for various subsequent cycles of relative humidity variations in the range 60-90%. (C) 1998 Elsevier Science Ltd . All rights reserved.