摘要
本文合成了铕(Ⅲ)与五种β-二酮(乙酰丙酮Acac、苯甲酰丙酮BA、二苯甲酰甲烷DBM、三氟乙酰丙酮TFA和噻吩甲烷三氟丙酮TTA)和碱(邻菲罗啉phen、哌啶pip、NaOH)的十三种固体三元配合物,其组成为Euβ_3·phen或C^+[Ruβ_4]^-,(C^+=Hpip^+或Na^+)测定了它们的红外、紫外和荧光光谱,观察到当第二配体相同时,随着β-二酮分子中的甲基被苯基、三氟甲基或噻吩基取代时,其配合物的相对荧光强度增大,第二配体的性质与影响配合物的相对荧光强度,表明分子中离域π键范围的大小和含该键平面的刚性是影响其荧光性质的重要因素。
Thirteen solid ternary coordination compounds of Eu (Ⅲ) with five kinds of β-diketones and three kinds of bases were synthesized. Their composition corresponds to Euβ3phen or C+(Euβ4)-(β=acetylacetone Acac, benzylacetone BA, dibenzylmethane DBM, trifluoroacetylacetone TFA,or thenoyltrifluoroacetone TTA, phen=1, 10-phenanthroline, C+= piperidinium Hpip+or Na+).IR spectra: The streching vibration frequency of carbonyl of β-diketones(vc=o) in all the complexes shifts to red and the new absorption bands appeared at 400-438 cm-1 and 490-515cm-1 correspond to the stretching bands of Eu-O and Eu-N, respectively. UV spectra:The absorption peaks of β-diketones in all the complexes shift to red and the intensity increased.The excitation and emission spectra in methanol for the complexes show that the substitution of methyl groups by phenyl, trifluoromethyl or thienyl groups will increase the intensity of fluorescence of the complexes. It also shows that ,the broader the delocalixation of π-electrons and the harder the plane for bonding, the greater the intensity of fluorescence will be.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1990年第3期249-252,共4页
Chinese Journal of Inorganic Chemistry
关键词
铕配合物
Β-二酮
碱
合成
光谱
europium diketone ternary coordination compound fluorescence
