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作 者:高云燕[1] 王子超[1] 欧植泽[1] 句宝龙 黄干[1] 冯钊[1]
机构地区:[1]西北工业大学理学院空间应用物理与化学教育部重点实验室,陕西西安710072
出 处:《影像科学与光化学》2015年第6期468-478,共11页Imaging Science and Photochemistry
基 金:国家自然科学基金(21073143);西北工业大学研究生创新种子基金(Z2015152)资助
摘 要:合成了3种具有不同取代基的咪唑[4,5-f]-1,10-邻菲罗啉配体L1~L3及其Ru(Ⅱ)配合物[Ru(L1)3]、[-Ru(L2)3]和[-Ru(L3)3],并进行了表征。这些Ru(Ⅱ)配合物在溶液中具有π→π*跃迁吸收峰和金属到配体的电荷转移跃迁(MLCT)吸收峰,其发光峰位约为590nm左右。将Ru(Ⅱ)配合物掺杂到聚甲基丙烯酸甲酯(PMMA)中得到相应的温敏漆。Ru(Ⅱ)配合物在PMMA膜中的吸收峰精细结构消失,且在长波方向663nm附近有新的发射峰,表明Ru(Ⅱ)配合物在PMMA膜中有聚集。温度升高后,Ru(Ⅱ)配合物在PMMA膜中的发射峰强度逐渐减弱。分别计算了在30-60℃和60-90℃区间内非辐射活化能Enr和温度灵敏度ST。结果表明,具有苯基取代的咪唑[4,5-f]-1,10-邻菲罗啉配体的[-Ru(L1)3]配合物,比咪唑[4,5-f]-1,10-邻菲罗啉Ru(Ⅱ)配合物[-Ru(L2)3]及烷基取代基的咪唑[4,5-f]-1,10-邻菲罗啉Ru(Ⅱ)配合物[Ru(L3)3]具有更高的温度灵敏度。Three imidazo[-4,5-f2-1,10-phenanthroline derivatives L1-L3, with different substitutes, and their Ru( Ⅱ ) complexes have been synthesized and characterized. These Ru( Ⅱ ) complexes show characteristic π→π*transition and metal-ligand charge transfer (MLCT) transition absorptions, and emission maximums at 590 nm. The Ru (Ⅱ ) complexes have been doped into the Poly (methyl methacrylate) (PMMA) and obtained thetemperature sensitive paint. In PMMA film, the fined structure of the absorption spectra of the Ru ( Ⅱ ) complexes disappeared, and a new emission peak at the longer wavelength (663 nm) appeared, indicating theaggregation of Ru( Ⅱ ) complexes. The emission intensity of the Ru( Ⅱ ) complexes in PMMA film decreases gradually with increase of the temperature. The activation energy of non-radiative process (Enr) temperaturesensitivity (ST) of compounds are calculated in the range of 30 60 ℃and 60 90 ℃, respectively. The results indicate that [Ru(L1 )3 ] with phenyl substituted imidazo[-4,5-f]-1, 10-phenanthroline has relatively higher STthan [Ru(L2)3] with imidazo[4,5-f]-1, 10-phenanthroline and [Ru(L3 )3 ] with alkyl substituted imidazo[4,5 f]-1, 10-phenanthroline.
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