Copper complex with a magnetic ordering temperature above 400 K.

A monohydrated Cu[sup II] dimer [Cu[sub 2](Sala)[sub 2](H[sub 2]O)][sub n] [H[sub 2]Sala=N-(2-hydroxybenzyl)-L-alanine] exists as a coordination-helical polymer in the solid state. Thermal dehydration at 340-373 K converts this helical polymer to three-dimensional chiral network polymer, [Cu[sub 2](Sala)[sub 2]][sub n]. Both the hydrated and the anhydrous samples exhibit canted antiferromagnetism at room temperature. A compensation temperature was observed at around 20 K. The hydrated sample has a magnetic ordering temperature of 300 K, while the anhydrous structure possessed a magnetic ordering temperature as high as 435 K. © 2001 American Institute of Physics. [ABSTRACT FROM AUTHOR]