Spin crossover phenomenon of a semi-fluorinated iron (II) complex organized in a Langmuir-Blodgett film

A new amphiphilic iron (II) complex bearing semi-fluorinated chains has bee n organized in Langmuir and Langmuir-Blodgett (LB) films. This molecule for ms a perfectly stable monolayer at the gas-water interface. Such a film can be transferred easily onto a solid substrate leading to well-defined multi layers. The spin crossover phenomenon occurring in this material has been s tudied by infrared spectroscopy and magnetization measurements. In the LB f ilm architecture, the iron complex appears to be quenched in a high spin st ate. This quenching can be released after a thermal annealing and is theref ore associated to the specific organization induced by the LB technique. (C ) 2000 Elsevier Science B.V. All rights reserved.