Flexible Metal Chelate Polymers Through Nonrigid Metal Centers.

摘要

Flexible polymers from conjugated organic ligands and nonrigid metal centers have been synthesized and have been evaluated for thermal stability. A tungsten polymer, bis(5,7-dichloro-8-quinolinolato)-5,8-quinoxalinediolato-tungsten(IV) with number average molecular weight near 40,000 to 50,000 Daltons has been synthesized from the quinoxalinedione and a tungsten(II) intermediate. Several other polymers, monomers, and intermediates have also been investigated, where the metals range from molybdenum and tungsten to zirconium and the eight-coordinate centers are all N4O4 ligand donor sets, and with the seven-coordinate intermediate possessing carbon, phosphorus, nitrogen, oxygen, and/or chlorine donors. The molybdenum and tungsten species appear to have energy-transfer potential. (Author)