摘要
铕 ( )和二苯甲酰甲烷 (HDBM)形成的有机配合物与聚丙烯酸 (PAA) (Mn=5 0 0 0 )、聚 (苯乙烯 -丙烯酸 ) (PSAA) (Mn=3 0 0 0 )发生配位反应 ,分别得到配位聚合物 Eu( ) -DBM-PAA和 Na Eu( ) -DBM-PSAA,产率分别为 89.7%和 87.3 % .红外光谱、紫外光谱、X光电子能谱测试表明 ,Eu3+分别与 PAA,PSAA和 DBM-发生配位 ,元素分析和电导率测定结果证明 ,1个 Eu3+分别与 PAA中 2个链节或 PSAA中3个链节的羧基和 1个 DBM-发生配位 .Eu3+离子在配位聚合物 Eu( ) -DBM-PAA和 Eu( ) -DBM-PSAA中的含量分别为 2 8.4 6%和 1 2 .2 3 % .荧光光谱表明 ,常温下配位聚合物在紫外光下发出强的红光 ,主要是Eu3+离子的 5D0 → 7F2
Luminescent rare earth complexes, particularly europium β-diketonates, have been intensively studied with respect to applications for luminescence. Recently, rare earth complexes have attracted considerable attention for organic electroluminescent(EL) devices as well as for optical microcavity emitters owing to their inherent extremely sharp emission bands and potentially high internal quantum efficiency. Their coordination polymers [Eu(Ⅲ)-DBM-PAA and NaEu(Ⅲ)-DBM-PSAA] were synthesized by the reaction of metal organic complex(NaEu(DBM)_4) with polyacrylic acid( M_n= 5 000) and copolymer of acrylic acid and styrene( M_n=3 000), the yields of Eu(Ⅲ)-DBM-PAA and NaEu(Ⅲ)-DBM-PSAA are about 89.7% and 87.3%, respectively. The coordination polymer was characterized by FTIR, UV, XPS and its composition and the structure were determinated. The result of electrical conductivity and elemental analysis indicate that each Eu(Ⅲ) ion is coordinated by carboxyl from two units in the Eu(Ⅲ)-DBM-PAA molecule or three units in the NaEu(Ⅲ)-DBM-PSAA molecule and one DBM -. Their coordination polymer with Eu(Ⅲ) content reached up to 28.46% and 12.23%. The Eu-copolymer luminophores exhibited intense red light at 615 nm under UV excitation at room temperature, which is attributed to the 5D_0→ 7F_2 transition of Eu(Ⅲ) ions.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第3期541-546,共6页
Chemical Journal of Chinese Universities
基金
福建省自然科学基金重大项目 (批准号 :2 0 0 1F 0 0 5 )
福建省科学技术厅
教育厅项目 (批准号 :K2 0 0 75 )资助
