[1] Univ Alicante, Dept Interuniversitario Optic, Laboratorio Optic, Apdo 99, Alicante, Spain
[2] Univ Miguel Hernandez, Dept Ciencias Expt & Tecnol, Paseo Melchor Botella S-N,Apdo 03206, Alicante, Spain
[3] Univ Alicante, Dept Fis, Ingn Sisternas TeorIa sefla, Apdo 99, Alicante, Spain
[4] CSIC, Inst Quim Organ, Madrid, Spain
[5] CSIC, Inst Ciencia Tecnologia Polimer, Madrid, Spain