共查询到18条相似文献,搜索用时 187 毫秒
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合成了以苯甲酰丙酮为第一配体,1,10-邻菲哆啉为第二配体的一种铽的三元配合物Tb(BAC)3Phen,通过元素分析确定了其组成,并用红外吸收光谱、紫外。可见光吸收光谱、差热-热重曲线、原子力显微镜对其进行了表征,同时研究了Tb(BAC)3Phen的光致发光性能。实验结果表明配体苯甲酰丙酮和1,10-邻菲哆啉能够较好地敏化中心离子Tb^3-发光,Tb(BAC)3Phen的最大发射波长为615nm,并具有良好的热稳定性和成膜性,是一种黄白光发光材料。 相似文献
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分别以α-萘甲酸(α-HNMA)、β-萘甲酸(β-HNMA)、α-萘乙酸(α-HNAA)、β-萘乙酸(β-HNAA)为第一配体,1,10-邻菲啰啉(phen)为第二配体,合成了4种Eu(III)和4种Tb(III)的三元配合物。通过元素分析、配位滴定确定了各配合物的组成。通过红外光谱对配合物的结构进行了初步表征,发现各配体的特征吸收峰(νC=O、νC=N)在形成配合物后不同程度地向低波数方向移动,说明配合物中羧基氧原子和邻菲啰啉中的氮原子均参与了配位?捎肨G-DTG技术对8种配合物的热分解过程进行了研究,8种配合物均有较好的热稳定性。室温下测得了各配合物粉末的激发和发射光谱,结果表明,4种铕的三元配合物均发出红色荧光,最强发射峰613 nm附近的强度顺序为:Eu(β-NMA)3phen>Eu(α-NMA)3phen.H2O>Eu(α-NAA)3phen>Eu(β-NAA)3phen.H2O。4种铽的三元配合物无明显的荧光现象。 相似文献
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分别以α-萘甲酸(α-HNMA)、β-萘甲酸(β-HNMA)、α-萘乙酸(α-HNAA)、β-萘乙酸(β-HNAA)为第一配体,1,10-邻菲啰啉(phen)为第二配体,合成了4种Eu(Ⅲ)和4种Tb(Ⅲ)的三元配合物.通过元素分析、配位滴定确定了各配合物的组成.通过红外光谱对配合物的结构进行了初步表征,发现各配体的特征吸收峰(VC=O、VC=N)在形成配合物后不同程度地向低波数方向移动,说明配合物中羧基氧原子和邻菲啰啉中的氮原子均参与了配位.采用TG-DTG技术对8种配合物的热分解过程进行了研究,8种配合物均有较好的热稳定性.室温下测得了各配合物粉末的激发和发射光谱,结果表明,4种铕的三元配合物均发出红色荧光,最强发射峰613 m附近的强度顺序为Eu(β-NMA)3phen>Eu(α-NMA)3phen·H2O>Eu(α-NAA)3phen>Eu(β-NAA)3phen·H2O.4种铽的三元配合物无明显的荧光现象. 相似文献
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为了研究三脚架型配体与其稀土配合物荧光性质的关系,合成了三脚架型配体--2,2,2-胺三乙酰-吡啶及其6种稀土配合物.通过元素分析、摩尔电导、红外光谱、核磁共振波谱、差热-热重分析和荧光光谱等分析手段对配体及其稀土配合物的组成、性质进行了表征.结果表明,配合物的组成为Re(NO3)3·L·6H2O(Re=Ce3 ,Sm3 ,La3 ,Tb3 ,Y3 ,Eu3 );在DMF中属于2:1型电解质,其中,配合物中既存在以单齿形式与中心离子配位的NO-3,也存在游离的NO-3.荧光光谱分析表明,Tb(Ⅲ)配合物具有较强的Tb3 特征线状荧光,说明T(L)→5D4(Tb)的能级较匹配,从而使Tb3 荧光发射大大增强.同时,研究了溶剂中荧光增强效应,说明在极性较强、中性体系中配体对Tb3 的敏化作用较强. 相似文献
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《化工新型材料》2010,(4)
以邻(间、对)苯二甲酸[o(m、p)-PA]和1,10-邻菲啰啉(phen)为配体,合成了5种Tb(III)的三元配合物。各配合物的组成分别为:Tb2(m-PA)3(phen)2.6 H2O、Tb2(p-PA)3(phen)2.2 H2O、Tb2(o-PA)3phen.4 H2O、Tb2(m-PA)3phen.4 H2O和Tb2(p-PA)3phen.4 H2O。红外光谱分析表明,在各配合物中羧基氧原子和1,10-邻菲啰啉中的氮原子均参与了配位。5种配合物均有较好的热稳定性,它们的热稳定性顺序为:Tb2(m-PA)3(phen)2.6 H2OTb2(p-PA)3(phen)2.2 H2OTb2(m-PA)3phen.4 H2OTb2(o-PA)3phen.4 H2OTb2(p-PA)3phen.4 H2O。在室温条件下,5种铽的三元固体配合物均发出绿色荧光,它们在最佳发射峰5D4→7F5(545nm)时的荧光强度顺序为:Tb2(p-PA)3phen.4 H2OTb2(m-PA)3(phen)2.6 H2OTb2(p-PA)3(phen)2.2 H2OTb2(m-PA)3phen.4 H2OTb2(o-PA)3phen.4 H2O。 相似文献
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《Materials Chemistry and Physics》2014,143(3):1119-1130
With chloromethylated polysulfone as starting substance, naphthoic acid (NA) and benzoic acid (BA) were bonded onto the side chains of polysulfone (PSF) via polymer reactions, obtaining two kinds of aromatic carboxyl acid-functionalized polysulfone, PSFNA and PSFBA. Subsequently, the luminescent binary and ternary polymer-rare earth complexes of Eu(Ⅲ) and Tb(Ⅲ) were prepared through coordination reactions, respectively, with PSFNA and PSFBA as macromolecule ligands and with 1,10-phenanthroline (Phen) and 4,4′-bipyridine (Bipy) as small-molecule co-ligands. This work focuses on investigating the relationship between structure and photoluminescence property of these complexes. The experimental results indicate that the macromolecule ligands PSFNA and PSFBA can strongly sensitize the fluorescence emissions of Eu3+ ion or Tb3+ ion, and the sensitization effect is strongly dependent on the structure of the ligands and the property of the central ions. The fluorescence emission of the binary complex PSF–(NA)3–Eu(Ⅲ) is stronger than that PSF–(BA)3–Eu(Ⅲ), suggesting the bonded ligand NA has stronger sensitization action for Eu3+ ion than ligand BA; The binary complex PSF–(BA)3–Tb(Ⅲ) emit very strong characteristic fluorescence of Tb3+ ion, displaying that ligand BA can strongly sensitize Tb3+ ion, whereas PSF–(NA)3–Tb(Ⅲ) does not emit the characteristic fluorescence of Tb3+ ion, showing that the bonded ligand NA does not sensitize Tb3+ ion. The fluorescence intensity of the ternary complexes is stronger than that of the binary complexes in the same series. The solid films of these complexes also emit the strong characteristic fluorescence of Eu3+ ion or Tb3+ ion. 相似文献
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Complexes of salicylic acid (Sal) and 1,10-phenanthroline (Phen) were synthesized coordinated with terbium ion (Tb3+) in crystalline phases. The structural characterizations of the lanthanide complex were made using FT-IR, NMR (1H and 13C) and XRD techniques. These measurements confirm the formation of Tb(Sal)3Phen complex structure. The thermal aspects of the complex were examined using DTA and TGA techniques. An enhancement in luminescence intensity of Tb3+ ion bands were observed in Tb(Sal)3Phen complex as compared to TbCl3 crystals on 355 nm laser excitation. Enhancement is reported due to the efficient energy transfer process from Sal to Tb3+ ions. This is also confirmed by the time resolved photoluminescence spectroscopy with increase in lifetime of Tb3+ ions due to encapsulation in Sal/Phen network. Our system in itself can be a deserving candidate for luminescent solar collector material when coupled with solar cells. 相似文献
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以邻(间、对)苯二甲酸[o(m、p)-PA]和1,10_邻菲啰啉(phen)为配体,合成了5种Tb(Ⅲ)的三元配合物.各配合物的组成分别为:Tb_2(m-PA)_3(phen)_2·6H_2O、Tb_2(p-PA)_3(phen)_2·2H_2O、Tb_2(o-PA)_3phen·4H_2O、Tb_2(m-PA).phen·4H_2O和Tb_2(p-PA)_3phen·4H_2O.红外光谱分析表明,在各配合物中羧基氧原子和1,10-邻菲啰啉中的氮原子均参与了配住.5种配合物均有较好的热稳定性,它们的热稳定性顺序为:Tb_2(m-PA)_3(phen)_2·6H_2O>Tb_2(p-PA)_3(phen)_2·2H_2O>Tb_2(m-PA)_3phen·4H_2O>Tb_2(o-PA)_3phen·4H_2O>Tb_2(p-PA)_3phen·4H_2O.在室温条件下,5种铽的三元固体配合物均发出绿色荧光,它们在最佳发射峰~5D_4→~7F_5(545nm)时的荧光强度顺序为:Tb_2(p-PA)_3phen·4H_2O>Tb_2(rn-PA)_3(phen)_2·6H_2O>Tb_2(p-PA)_3(phen)_2·2H_2O>Tb_2(m-PA)_3phen·4H_2O>Tb_2(o-PA)_3phen·4H_2O. 相似文献
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Two kinds of Eu3+ COmplexes-Eu(TTA)3(TPPO)2 (TTA: thenoyltrifluoroacetone, TPPO: triphenylphosphineoxide) and Eu(BA)3(TPPO)2 (BA: 1-benzoylacetone)-were fully encapsulated, uniformly distributed into the channels of unmodified and modified SBA-15, and structurally characterized. The luminescent properties of the encapsulated complexes were systematically studied in contrast to the pure complexes. The results indicate that the excitation bands assigned to the pi-pi* electron transition of the ligands for Eu3+ complexes encapsulated in SBA-15 were split into different components, and the 5D0-7F0 transitions became partly allowed. The emission lines for the 5D0-7F2 transitions became broader and the relative intensity for different crystal field components varied greatly in comparison to the pure complex. Most importantly, the photostability and thermostability of the emissions improved considerably. 相似文献
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以9,10-双蒽酸(H2L)和2,6-二甲基吡啶(Hdmpy)为配体,合成了一个二维结构的稀土配合物{[Tb(L)2(H2O)2] (Hdmpy) (H2O)2}∞;用原位聚合法将该稀土配合物与丙烯酸类聚氨酯大分子单体复合,制备出{[Tb(L)2(H2O)2](Hdmpy)(H2O)2}∞/丙烯酸酯类聚氨酯稀土高分子材料,并研究了稀土配合物在材料中的分散及材料的热稳定性、荧光性能等.研究结果表明,配合物在稀土高分子材料中主要以200~500nm颗粒均匀分散;且该材料具有良好的热稳定性能(>300℃),在波长372nm的激发光下,材料在440nm出现最大荧光发射峰,有望应用于发光材料领域. 相似文献
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Yaru Ni Jing Tao Chunhua Lu Zhongzi Xu Zhitao Kang Feng Xu 《Journal of Materials Science》2013,48(15):5309-5315
A series of Sm x Tb1?x (TTA)3Phen (x = 1.0, 0.9, 0.7, 0.5, 0.3, 0.1, 0) complexes was synthesized by wet chemical method and characterized using Fourier transform infrared spectroscopy and fluorescence spectroscopy. The IR absorption spectra indicate that α-thenoyltrifluoroacetone was coordinated to the rare earth ions and that chemical bonds were formed between rare earth ions and the nitrogen atoms in 1,10-Phenanthroline (Phen). The fluorescence spectra of the complexes indicate that the emission intensity of Sm3+ was enhanced by the addition of substitutive Tb3+. These data show that not only the ligands (TTA and Phen) but also Tb3+ could absorb and transmit energy to Sm3+ in the complexes. Formation of dual-core complexes appears to be responsible for co-fluorescence, which can greatly promote the illuminant ability of Sm (TTA)3Phen complex. After further encapsulation by SiO2, the Sm x Tb1?x (TTA)3Phen@SiO2 core–shell structure was very stable to UV light. 相似文献