Healing of defects in ETS-10 by selective UV irradiation: a Raman study

The UV–Raman spectra of a crystalline and a defective ETS-10 sample have shown that the two materials possess different stability under the laser beam. These results are interpreted in terms of a possible light-induced healing of defects in the case of the defective sample, through annealing of two vicinal TiOH groups along the Ti–O–Ti chains. Possible implications for the preparation of highly ordered materials are envisaged.