Module 3 : Chemical and non–chemical approach to materials synthesis - part 1

Lecture 22: Solid-State Synthesis

Chimie Douce (Soft Chemistry)

Approach : Chimie Douce reactions are carried out under moderate conditions
(typically T< 500°C). Chimie Douce reactions are topotactic , meaning that structural elements of the reactants are preserved in the product, but the composition changes.

Advantages : Chimie Douce Methods are very useful for the following applications:

Modifying the electronic structure of solids (doping)

Design of new metastable compounds (structural motif can be selected by choice of precursor, may have unusual properties)

Preparing reactive and/or high surface area materials used in heterogeneous catalysis, batteries and sensors

Disadvantages : First of all, one must find the appropriate precursor in order to carry out chemie douce. Secondly, metastable products are often unstable in applications where high temperatures are used.