摘要
以二苯甲酰甲烷(DBM)为主配体、新配体2-(2-苯并咪唑基)-8-辛氧基喹啉为第二配体,合成了一种新的Eu(Ⅲ)配合物发光材料,对所得配合物的热性能、光性能和电化学性能进行了研究,结果表明,该配合物具有较高的热稳定性,熔点为235℃,起始分解温度为252℃。配合物的HOMO轨道能级(EHOMO)、LUMO轨道能级(ELUMO)及能隙(Eg)分别为-6.12、3.06和3.06 eV。荧光光谱分析表明,在固态条件下,配体吸收的能量全部转移给Eu(III)离子,配合物的荧光光谱在611 nm处显示一对称的单峰,其半峰宽为4.7 nm。
A luminescent Eu ( Ⅲ ) complex, Eu ( Ⅲ ) (DBM) 3 BIOQ, was synthesized with dibenzoylmethane (DBM) as the first ligand and a new ligand, e. g. 2-(benzimidazol-2-yl)-8-octyloxyquinoline (BIOQ), as the second ligand. The Eu ( Ⅲ) complex exhibits relatively high thermal stability with a melting point of 235℃and a decomposition temperature (onset) of 252℃. The energy levels of HOMO, LUMO and the energy gap (Eg) are -6. 12, 3. 06 and 3.06 eV respectively. The emission spectrum of the complex in solid state (λex =350 nm) exhibits a single and symmetric emission band at 611 nm with a full width at half maximum of 4. 7 nm.
出处
《中山大学学报(自然科学版)》
CAS
CSCD
北大核心
2009年第2期54-57,62,共5页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
广东省自然科学基金资助项目(039184)
关键词
铕配合物
红色发光
热稳定性
循环伏安法
europium compounds
luminescence
thermodynamic stability
cyclic voltammetry