Synthesis and Characterization of Organic Materials with ?à-extended Conjugation using X-Ray Techniques.

A. T. PIOTTO; R. E. BOLMARO; MARTINA AVALOS; R. SPANEVELLO

Florianópolis

Congreso; PTECH 2011 - Eighth International Latin American Conference on Powder Technology; 2011

PTECH 2011 - Eighth International Latin American Conference on Powder Technology

In the field of materials science, the chemical synthesis and study of properties of materials constituted by organic macromolecular systems defined by p-extended conjugation is an area of great interest. This type of compounds exhibits remarkable electro-conductive, optical and magnetic properties as shown for instance by fluorene derivatives. Artificial photosynthesis, photocatalysis, solar cells, molecular optoelectronics are some of its important applications[1]. High Temperature Powder X-Ray Diffraction (XRD) techniques were used to explore in situ possible crystalline changes in some of these compounds. XRD pattern analysis, allowed evaluating their response regarding chemical identity preservation in relation to their crystal structures in between room temperature and 400 ¢XC[2]. Those results were also investigated by using Thermal Analysis (TA) techniques. The application of those techniques will help us to investigate and understand the optical and electro-conductive properties of fluorene derivatives. [1] N. Nielsen, F. Diederich, The Chemical Record 2002, 189-198. [2] S. Masashi, O. Naoya, S. Fumio, M. Toshio, Polymer Journal 2011, 43, 51¡V57.