稀土配合物的光致变色机理和光动力学研究

Eleven new succimido amino acids were synthesized by Mannich reaction. The aqueous solution of their rare earth complexes with 1,10-phenanthroline (phen) shows photochromism when UV-irradiated. Hydrolysis of these amino acid derivatives results in respective amino acids. And their rare earth complexes with phen have photochromic properties. Sixteen new lanthanide supramolecular compounds of amino acids and phen were synthesized, and characterized by single crystal X-ray diffraction. The photochromic systems were observed by UV-Vis, 1H and 13C NMR, and EISMS. The results indicate that there is only one independent step in the decoloration process and affirm that photochromic process is a first-order kinetic one. Probably, the photochromic phenomenon is a proton transfer process due to photoinduced thermal activation. However, hardly soluble rare earth carboxylate coordination polymers have no photochromic properties.

重点研究光诱导下稀土配合物发生的光化学反应，阐明光致变色机理。主要利用紫外、可见光谱、1H和C13核磁共振谱和溶液质谱等技术确定变色后亚稳态稀土配合物的组成，摩尔消庀凳退俾食Ｊ取８闱宄⊥僚浜衔锏墓饣Х从凸庵卤渖窒蟆Ｎ杓坪秃铣上煊臁⒖蛊＠偷墓庵卤渖⊥僚浜衔镄绿逑导捌湎⊥列畔⒋娲⑿虏牧咸峁┦匝橐谰荨