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Synthesis of Tenoltrifluoroacetone Composite Doped with Terbium, Dysprosium and Europium Encapsulated in Silica Oxide Matrix 认领
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作者 Yazmin Francisco Dulce Medina +4 位作者 Miguel Barron Joan Reyes Pedro Adrian Martinez Angel de Jesus Morales Elizabeth Garfias 《表面工程材料与先进技术期刊(英文)》 2020年第4期63-74,共12页
The synthesis of the thenoyltrifluoroacetone compound doped with terbium, dysprosium and europium encapsulated in a silica matrix (TTA:Tb:Dy:Eu@SiO<sub>2</sub>) were performed by the sol-gel method. The pr... The synthesis of the thenoyltrifluoroacetone compound doped with terbium, dysprosium and europium encapsulated in a silica matrix (TTA:Tb:Dy:Eu@SiO<sub>2</sub>) were performed by the sol-gel method. The precursors to obtain the vitreous phase (SiO<sub>2</sub>) were: Tetraethylorthosilicate (TEOS, C<sub>8</sub>H<sub>2</sub>O<sub>4</sub>Si, 98%, Aldrich), and ethyl alcohol (CH<sub>3</sub>CH<sub>2</sub>OH, 99.5%, Meyer), distilled water and 0.05 ml of hydrochloric acid (HCl, Meyer). The sample with molar ratio 20:80 TTA:Tb:Dy:Eu@SiO<sub>2</sub> has the best emission intensity. Thermogravimetric analysis (TGA) shown that silica encapsulated samples decompose at lower temperatures than pure TTA:Tb:Dy:Eu luminescent material. Fourier Transform Infrared (IR-TF) shown the characteristic Si-O-Si bands that are presented at a wavelength of 1049, 853 and 440 cm<sup><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#FFFFFF;">&#45</span>1</sup> confirming that the luminescent material is encapsulated in a silica matrix, finally X-ray diffraction (XRD) shown that TTA:Tb:Dy:Eu@SiO2 composite is amorphous. 展开更多
关键词 Synthesis LUMINESCENCE COMPOSITE Sol-Gel TERBIUM Dysprosium and Europium
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Optical analysis and separation of trivalent lanthanides in deep eutectic solvents 认领
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作者 Anika Soldner Burkhard Konig 《稀土学报:英文版》 SCIE EI CAS CSCD 2020年第7期784-792,I0004,共10页
Deep eutectic solvents(DESs) were used for luminescence measurements in quantitative analysis of trivalent lanthanide ions and as solvents for light rare earth elements(LREE) in solid-liquid separation.The spectroscop... Deep eutectic solvents(DESs) were used for luminescence measurements in quantitative analysis of trivalent lanthanide ions and as solvents for light rare earth elements(LREE) in solid-liquid separation.The spectroscopic characteristics of lanthanide chlorides LnCl3(Ln=Eu,Tb),respectively their aquo complexes,are described in a comprehensive study that demonstrates the significant enhancement of the phosphorescence emission intensity in DESs as polar and weakly coordinating solvent.Several DESs stabilize the lanthanide ion luminescence against changes in temperature and moisture,which is advantageous compared with the use of ionic liquids.Small amounts of water lead in certain eutectic systems even to a further increase in phosphorescence emission intensity.By investigating the solubility of lanthanide sesquioxides Ln2 O3(Ln=La,Nd,Sm,Eu,Gd,Tb,Dy) in DESs,selectivities are identified that may be of use for the separation of LREE. 展开更多
关键词 Deep eutectic solvents EUROPIUM TERBIUM LUMINESCENCE SEPARATION Rare earths
铽掺杂碳点的制备及其抑菌性能 认领
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作者 李宏 田浩 +3 位作者 于丽娟 高哲 杨亚玲 李晚谊 《浙江农业学报》 CSCD 北大核心 2020年第2期291-298,共8页
以马铃薯为原料,通过一步水热法合成碳点,利用稀有金属铽对碳点进行表面修饰,制备铽掺杂碳点(Tb-CDs),通过透射扫描电镜、紫外光谱、红外光谱、荧光光谱等对Tb-CDs进行表征,并研究Tb-CDs在光催化条件下对大肠埃希菌的抑菌作用和对大肠... 以马铃薯为原料,通过一步水热法合成碳点,利用稀有金属铽对碳点进行表面修饰,制备铽掺杂碳点(Tb-CDs),通过透射扫描电镜、紫外光谱、红外光谱、荧光光谱等对Tb-CDs进行表征,并研究Tb-CDs在光催化条件下对大肠埃希菌的抑菌作用和对大肠埃希菌做荧光标记的可行性。结果显示,Tb-CDs颗粒小,粒径均匀,分散性好,荧光性强,因其表面富含羧基和羟基等,具有较好的水溶性。在光催化条件下,Tb-CDs对大肠埃希菌具有较好的抑菌作用。当Tb-CDs的质量浓度为0.6 mg·mL^-1,可见光照射60 min时,其对大肠埃希菌的抑菌率可达100%。此外,Tb-CDs能有效地对大肠埃希菌进行荧光标记。 展开更多
关键词 碳点 荧光标记 光催化 抑菌
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A Luminescent Tb(Ⅲ)-4,4’,4’’-nitrilotribenzoate Compound with a Three-dimensional Structure 认领
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作者 徐梦烨 王志琴 +1 位作者 王玉玲 刘庆燕 《结构化学》 SCIE CAS CSCD 2020年第1期126-131,4共7页
A coordination polymer of [Tb(ntb)]n(1) based on 4,4’,4’’-nitrilotribenzoate ligand(ntb3–) was synthesized. Compound 1 crystallizes in monoclinic system, space group C2/c with a = 13.7318(4), b = 27.5628(9), c = 5... A coordination polymer of [Tb(ntb)]n(1) based on 4,4’,4’’-nitrilotribenzoate ligand(ntb3–) was synthesized. Compound 1 crystallizes in monoclinic system, space group C2/c with a = 13.7318(4), b = 27.5628(9), c = 5.4046(2) ?, β = 111.142(3)°, V = 1907.88(12) ?3, Z = 4, C21H12NO6Tb, Mr = 533.24, Dc = 1.856 g/cm3, μ = 3.745 mm–1, F(000) = 1032, the final R = 0.0184 and wR = 0.0456 for 1883 observed reflections with Ⅰ > 2s(Ⅰ). In compound 1, the eight-coordinated Tb(III) atoms are bridged by carboxylate groups of ntb3– ligands to generate a one-dimensional Tb-carboxylate chain, which is further linked by the ntb3– ligands to form a three-dimensional structure. Compound 1 exhibits characteristic Tb(Ⅲ) luminescent emissions in the solid state. 展开更多
关键词 TERBIUM COORDINATION polymer 4 4’ 4’’-nitrilotribenzoate LUMINESCENCE crystal structure
Characterization of luminescent hydroxyapatite@terbium complex core-shell composites using chlorobenzoic acid as ligands 认领
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作者 Guangpeng Jiang Lulu Song +1 位作者 Dongliang Tao Feng Jin 《稀土学报:英文版》 SCIE EI CAS CSCD 2020年第11期1165-1170,I0001,共7页
Three kinds of novel hydroxyapatite@terbium complex core-shell composites were synthesized with 2-chlorobenzoic acid,4-chlorobenzoic acid,and 2,4-dichlorobenzoic acid as the ligand,respectively.The XRD,UV/vis absorpti... Three kinds of novel hydroxyapatite@terbium complex core-shell composites were synthesized with 2-chlorobenzoic acid,4-chlorobenzoic acid,and 2,4-dichlorobenzoic acid as the ligand,respectively.The XRD,UV/vis absorption and FT-IR results show that terbium ions are coordinated with ligands and the corresponding complexes are successfully included into composites.SEM and EDS results reveal that Tb complexes are fully and homogenously coated on the surface of hydroxyapatite(HAP)microspheres consisting of a large number of nanosized crystals.The strongest luminescence properties are obtained when 2,4-dichlorobenzoic acid is used as ligand.The study on fluorescence lifetime of composites shows that the lifetime is inversely related to emission intensity.TGA-DSC results indicate that the core-shell composites have an excellent thermal stability.Therefore,the current core-shell structure provides a cost-effective route to manufacture of biocompatible and heatresistant highly luminescent materials. 展开更多
关键词 Luminescence properties Chlorobenzoic acid HYDROXYAPATITE Terbium complex Core-shell composites Rare earths
克量级铀中微量铕和铽的放化分离方法研究 认领 被引量:1
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作者 王秀凤 丁有钱 +2 位作者 毛国淑 马鹏 杨磊 《原子能科学技术》 EI CAS CSCD 北大核心 2020年第5期895-902,共8页
为提高中子诱发铀裂变时低产额裂变产物156 Eu和161 Tb产额测量的精度,需获得放化纯的156 Eu和161 Tb样品。本工作建立了氢氧化物共沉淀法除铝、氟化钙共沉淀法除铀、TRPO萃取法提取稀土元素、阳离子交换色谱法从混合稀土元素中分离Eu... 为提高中子诱发铀裂变时低产额裂变产物156 Eu和161 Tb产额测量的精度,需获得放化纯的156 Eu和161 Tb样品。本工作建立了氢氧化物共沉淀法除铝、氟化钙共沉淀法除铀、TRPO萃取法提取稀土元素、阳离子交换色谱法从混合稀土元素中分离Eu和Tb的流程,可用于大量铀、铝和裂变产物中微量Eu和Tb的分离。在待分离样品中含2 g铀、0.65 g铝和裂变产物的条件下,该流程对Eu、Tb的化学回收率均大于80%,对U、239 Np、95 Zr、103 Ru、131 I、132 Te、140 Ba、140 La、141 Ce、147 Nd等主要干扰物质的去污因子达到106。该方法可满足中子诱发铀裂变时156 Eu和161 Tb产额精确测量的要求。 展开更多
关键词 分离
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一种五元羧酸与Eu(Ⅲ)、Tb(Ⅲ)配合物的结构及光致发光性质 认领
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作者 王磊 何盼盼 王宏胜 《无机化学学报》 SCIE CAS CSCD 北大核心 2020年第9期1625-1630,共6页
水热条件下利用一种五元有机羧酸分别与稀土铕和铽的高氯酸盐反应合成了二维配位聚合物{[Eu4(HL)2(ox)2(H2O)10]·3H2O}n(1)和{[Tb2(HL)(ox)(H2O)5]·2H2O}n(2)(H5L=4-(4-羧基苯基)吡啶-2,3,5,6-四羧酸;ox=草酸根离子)。X射线... 水热条件下利用一种五元有机羧酸分别与稀土铕和铽的高氯酸盐反应合成了二维配位聚合物{[Eu4(HL)2(ox)2(H2O)10]·3H2O}n(1)和{[Tb2(HL)(ox)(H2O)5]·2H2O}n(2)(H5L=4-(4-羧基苯基)吡啶-2,3,5,6-四羧酸;ox=草酸根离子)。X射线单晶衍射结构分析表明这2个配合物为同构化合物,属单斜晶系,P21/c空间群。草酸根离子可能是由于部分五元羧酸在水热反应过程中发生分解而产生。稀土离子与五元酸及草酸根配体配位,形成了二维平面结构。配合物1和2分别发射铕或铽离子的红色或绿色特征荧光,其绝对量子产率分别为45%和38%。铕配合物中5D0激发态的寿命为1.83 ms,铽配合物中5D4激发态的寿命为1.07 ms。 展开更多
关键词 4-(4-羧基苯基)吡啶-2 3 5 6-四羧酸 配位聚合物 量子产率 荧光寿命
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儿茶酚胺铽敏化发光性质的研究及分析应用 认领
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作者 连宁 张明 +1 位作者 张雅珩 贺香红 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 2019年第11期3487-3492,共6页
儿茶酚胺(Cas)作为神经递质和激素对人体的生理功能发挥着重要作用。它是一类分子中包含一个胺基和一个邻苯二酚基团的有机化合物,其中邻苯二酚基团由苯环和3,4位两个羟基组成。生理条件下,儿茶酚胺主要指多巴胺(DA)、去甲肾上腺素(NE)... 儿茶酚胺(Cas)作为神经递质和激素对人体的生理功能发挥着重要作用。它是一类分子中包含一个胺基和一个邻苯二酚基团的有机化合物,其中邻苯二酚基团由苯环和3,4位两个羟基组成。生理条件下,儿茶酚胺主要指多巴胺(DA)、去甲肾上腺素(NE)和肾上腺素(E)三种物质。儿茶酚胺性质不稳定,遇光或空气易氧化分解。镧系敏化发光是一种很有前途的临床和药物分析工具,在镧系敏化发光中,镧离子与有机化合物形成络合物,这些络合物具有良好的发光特性,主要用于有机分析物的测定。因此,利用镧系金属离子铽敏化发光法测定儿茶酚胺的关键是待测物与中心离子易形成稳定的络合物。儿茶酚胺与金属离子的络合作用主要依赖于分子中酚羟基解离后的氧作为成键原子,溶液的碱性越强,儿茶酚胺与金属离子的络合能力越强。在碱性介质中,为防止金属离子水解加入乙二胺四乙酸作为协同配体,金属离子铽和协同配体以及儿茶酚胺形成易溶于水的三元络合物,络合物具有良好的稳定性,并表现出较强的铽的特征荧光。加入阳离子表面活性剂十六烷基三甲基氯化铵为增敏剂,可使儿茶酚胺三元络合物体系的荧光强度增加约4~6倍。利用紫外吸收和荧光光谱研究了铽三元络合物的光物理性质以及能量转移机理,结果表明,儿茶酚胺能有效吸收紫外辐射,三元络合物荧光增强机理是配体儿茶酚胺吸收辐射能后通过分子内能量转移将能量转移给铽离子,进而产生铽的特征发射。对影响三元络合物荧光强度的主要因素如溶液酸度、试剂浓度和加入顺序、表面活性剂种类以及干扰物质等进行了讨论。在一定条件下,体系的发光强度与儿茶酚胺的浓度成线性关系。多巴胺、去甲肾上腺素和肾上腺素的线性范围分别为0.080~50.0×10^-6,0.070~50.0×10-6和0.070~50.0×10^-6 mol·L^-1;相应检出限分 展开更多
关键词 儿茶酚胺 三元络合物 荧光
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Tb掺杂BiOCl光催化剂的制备及其光催化性能研究 认领
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作者 李晓芳 郭宇煜 +3 位作者 张煜星 黄凤萍 赵冬冬 李鑫 《化工新型材料》 CAS CSCD 北大核心 2019年第8期143-147,共5页
以五水合硝酸铋、氯化钾、六水合硝酸铽、乙二醇为原料,采用溶剂热法成功制备Tb掺杂氯氧化铋(BiOCl)光催化剂。利用X射线粉末衍射仪、扫描电子显微镜、紫外-可见-近红外光谱仪对样品进行了表征,同时研究了Tb掺杂量对Tb/BiOCl光催化性能... 以五水合硝酸铋、氯化钾、六水合硝酸铽、乙二醇为原料,采用溶剂热法成功制备Tb掺杂氯氧化铋(BiOCl)光催化剂。利用X射线粉末衍射仪、扫描电子显微镜、紫外-可见-近红外光谱仪对样品进行了表征,同时研究了Tb掺杂量对Tb/BiOCl光催化性能的影响,探讨了其可能的光催化机理。结果表明:掺杂Tb可以使BiOCl禁带宽度收窄,同时将光响应区域部分扩展为可见光区;掺杂Tb可以有效地捕捉被激发的电子,从而使降电子和空穴复合的几率减小,Tb掺杂量为1%(摩尔分数)的Tb/BiOCl光催化剂表现出最佳的光催化性能,可见光照射120min后对甲基橙降解率达到了75%,光催化循环实验进行5次后,光催化剂的稳定性仍较高。 展开更多
关键词 氯氧化铋 溶剂热法 光催化
Rapid screening detection of fluoroquinolone residues in milk based on turn-on fluorescence of terbium coordination polymer nanosheets 认领
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作者 Xin Xu Lixia Feng +4 位作者 Jie Li Ping Yuan Jiangao Feng Lijun Wei Xianglei Cheng 《中国化学快报:英文版》 SCIE CAS CSCD 2019年第3期549-552,共4页
We report a facile, effective and rapid screening method for the determination of total fluoroquinolones(FQs) in milk using lanthanide coordination polymer nanomaterials as the sensing platform. The nonluminescent coo... We report a facile, effective and rapid screening method for the determination of total fluoroquinolones(FQs) in milk using lanthanide coordination polymer nanomaterials as the sensing platform. The nonluminescent coordination polymer nanosheets(CPNSs) used in this work are composed of adenosine monophosphate(AMP) and terbium(Tb3+) ions(AMP/Tb CPNSs). The as-prepared CPNSs were characterized by transmission electron microscopy, Fourier transform infrared spectroscopy and fluorescence techniques. Tb3+ acts as the center ion of the coordination polymer, with AMP assembled through phosphate and amine groups. However, the reaction between FQs and AMP/Tb CPNSs noticeably turns on the fluorescence due to the strong coordination interaction between FQs and Tb3+. Under optimized conditions, the fluorescence intensity of AMP/Tb at 545 nm shows a linear relationship with FQ concentrations between 0.04 μmol/L and 5.0 μmol/L. The relative standard deviation(RSD) of the intraday precision is below 1%, and detection limits are as low as 0.01 μmol/L. The proposed method was successfully applied to the determination of FQs in milk samples. 展开更多
关键词 Fluoroqui no lones TERBIUM coordination polymer NANOSHEETS FLUORESCENCE Screening DETECTION
稀土金属铽配合物材料的研究与应用 认领 被引量:1
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作者 郭春芳 《化工技术与开发》 CAS 2019年第1期44-46,共3页
本文简要介绍了稀土金属铽配合物在发光材料方面的研究进展,阐述了稀土金属铽配合物在白光用荧光材料、纳米发光纤维、荧光探针、木材修饰改性、碳量子点复合和金属功能材料等方面的最新应用成果,概述了稀土铽配合物在应用过程中出现的... 本文简要介绍了稀土金属铽配合物在发光材料方面的研究进展,阐述了稀土金属铽配合物在白光用荧光材料、纳米发光纤维、荧光探针、木材修饰改性、碳量子点复合和金属功能材料等方面的最新应用成果,概述了稀土铽配合物在应用过程中出现的不足和亟待解决的问题,并对稀土铽配合物的应用前景和未来发展予以展望。 展开更多
关键词 稀土配合物 功能材料
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铽荧光配合物的合成及其在手印显现中的应用 认领
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作者 谢垠蓬 沈敦璞 +1 位作者 张战胜 王猛 《化学研究与应用》 CAS CSCD 北大核心 2019年第3期470-476,共7页
分别以邻、间、对甲基苯甲酸(o-,m-,p-MA)为第一配体、邻菲罗啉(o-Phen)为第二配体,利用沉淀法合成了一系列稀土铽的三元荧光配合物。对该系列稀土铽荧光配合物的合成条件(配体种类、配体用量、体系pH、反应温度、反应时间)进行了优化... 分别以邻、间、对甲基苯甲酸(o-,m-,p-MA)为第一配体、邻菲罗啉(o-Phen)为第二配体,利用沉淀法合成了一系列稀土铽的三元荧光配合物。对该系列稀土铽荧光配合物的合成条件(配体种类、配体用量、体系pH、反应温度、反应时间)进行了优化。将最优条件下合成的[Tb(p-MA)3(o-Phen)]荧光配合物粉末应用到常见光滑客体表面潜在手印的显现技术中。从显现的对比度、灵敏度、选择性等方面对手印显现效果进行了详细考察。结果表明,显现后的手印在254nm紫外光的激发下,手印与客体之间的对比反差强烈,乳突纹线连贯清晰、细节特征反映明显,粉末只与乳突纹线部位吸附、基本不与小犁沟部位吸附。因此,本研究中基于铽荧光配合物的手印显现具有较强的对比度、灵敏度、选择性。 展开更多
关键词 手印显现 手印 配合物 荧光材料
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Photoluminescence and energy transfer in transparent glass-ceramics based on GdF3:RE^3+(RE=Tb,Eu)nanocrystals 认领
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作者 Natalia Pawlik Barbara Szpikowska-Sroka +2 位作者 Ewa Pietrasik Tomasz Goryczka Wojciech A.Pisarski 《中国稀土学报:英文版》 SCIE EI CAS CSCD 2019年第11期1137-1144,共8页
In the present work,the transparent oxyfluoride glass-ceramic samples containing GdF3:RE^3+(RE=Tb,Eu)nanocrystals(nGCs)were fabricated via controlled heat-treatment of precursor xerogels prepared using a sol-gel metho... In the present work,the transparent oxyfluoride glass-ceramic samples containing GdF3:RE^3+(RE=Tb,Eu)nanocrystals(nGCs)were fabricated via controlled heat-treatment of precursor xerogels prepared using a sol-gel method.The formation of GdF3 nanocrystalline phase from gadolinium(III)trifluoroacetate was verified based on XRD measurements.The average crystal sizes calculated from Scherrer formula were estimated to~10 nm as well as~6 nm for Tb^3+-and Eu^3+-doped samples,respectively.The optical behavior of prepared sol-gel samples was evaluated based on photoluminescence excitation(PLE)and emission spectra(PL)as well as luminescence decay analysis.Obtained samples exhibit the 5D4→7FJ(J=6-3,Tb3+)and the 5D0→7FJ(J=0-4,Eu3+)emission bands recorded within the visible spectral area under excitation at near-UV(393 nm(Eu^3+),351,369,378 nm(Tb^3+))as well as middle-UV illumination(273 nm(Gd3+)).Additionally,based on recorded decay curves,the luminescence lifetimes(τm)for the 5D4(Tb^3+)and the 5D0(Eu3+)excited states were also evaluated.In general,recorded luminescence spectra and double-exponential character of decay curves for nGCs indicate a successful migration of Tb^3+and Eu^3+dopant ions from amorphous silicate framework to lowphonon energy GdF3 nanocrystal phase. 展开更多
关键词 Sol-gel method GdF3 NANOCRYSTALS TERBIUM EUROPIUM Rare earths
二维配位聚合物[Tb(1,4-bdc)1.5(phen)(H 2O)]n的结构与光致发光性能研究 认领 被引量:1
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作者 于笑寒 王宏胜 +1 位作者 韩春杰 刘哲 《人工晶体学报》 EI CAS 北大核心 2019年第6期1055-1059,共5页
采用水热合成方法,在180℃条件下,高氯酸铽、1,10-菲罗啉和对苯二甲酸反应,合成了稀土铽(III)的二维配合物[Tb(1,4-bdc)1.5(phen)(H2O)]n(1)(phen=1,10-菲罗啉;1,4-H2bdc=对苯二甲酸)。单晶衍射分析结果表明,该配合物属三斜晶系,P1空间... 采用水热合成方法,在180℃条件下,高氯酸铽、1,10-菲罗啉和对苯二甲酸反应,合成了稀土铽(III)的二维配合物[Tb(1,4-bdc)1.5(phen)(H2O)]n(1)(phen=1,10-菲罗啉;1,4-H2bdc=对苯二甲酸)。单晶衍射分析结果表明,该配合物属三斜晶系,P1空间群,晶胞参数为a=1.03430(10)nm,b=1.0854(2)nm,c=1.1399(2)nm,α=107.284(16)°,β=91.58(2)°,γ=113.104(15)°。Tb(III)离子为八配位,六个配位氧原子中五个来自1,4-bdc,另一个来自配位水分子。两个配位氮原子来自1,10-菲罗啉分子。1,4-bdc在配合物中有三配位和四配位两种配位方式。该配合物在波长为325nm紫外光的激发下发射Tb(III)的绿色特征荧光,其光致发光的绝对量子产率为36%(λex=325nm),其5D4激发态的荧光寿命为0.638ms。 展开更多
关键词 配位聚合物 光致发光 量子产率 荧光寿命
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一个三羧酸配体构筑的铽金属-有机框架材料及对小分子溶剂的荧光识别 认领
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作者 林鸿 吕灵芝 冯云龙 《无机化学学报》 SCIE CAS CSCD 北大核心 2019年第5期787-792,共6页
以3-羟基-5-(3,5-二甲酸-苯氧基)苯甲酸(H3L)为配体,在溶剂热条件下与硝酸铽反应得到1个具有二维平面结构的镧系金属-有机框架材料(Tb-MOF):{[TbL(H2O)]·3H2O·DMF}n。单晶X射线衍射分析表明,Tb-MOF为正交晶系Ibca空间群。2个... 以3-羟基-5-(3,5-二甲酸-苯氧基)苯甲酸(H3L)为配体,在溶剂热条件下与硝酸铽反应得到1个具有二维平面结构的镧系金属-有机框架材料(Tb-MOF):{[TbL(H2O)]·3H2O·DMF}n。单晶X射线衍射分析表明,Tb-MOF为正交晶系Ibca空间群。2个Tb(Ⅲ)离子通过6个羧基桥联形成双核[Ln2(COO)6]次级结构单元,晶体由[Ln2(COO)6]次级结构单元相互连接形成具有左手或右手螺旋结构的一维无机链,左手螺旋链与右手螺旋链通过配体L3-相连形成二维层状结构。有机小分子溶剂交换荧光研究表明,Tb-MOF在硝基苯溶剂中表现出荧光猝灭现象,Tb-MOF材料对硝基苯等爆炸物具有潜在良好的荧光探测功能。 展开更多
关键词 3-羟基-5-(3 5-二甲酸-苯氧基)苯甲酸 金属-有机框架材料 晶体结构 荧光性质
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铽-恩诺沙星稀土药物配合物的合成及发光性 认领
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作者 王莹 王丽芳 +4 位作者 肖月 马冬云 张云杰 袁寰 杜永祥 《吉首大学学报:自然科学版》 CAS 2019年第1期69-71,92共4页
采用沉淀法合成了以药物恩诺沙星(ENRO)为第一配体,邻菲罗啉(Phen)为第二配体的稀土铽药物配合物,采用元素分析、紫外光谱、红外光谱法初步表征配合物结构,并对其荧光性质进行了考察.结果显示,配体与稀土铽离子之间发生了配位,生成了新... 采用沉淀法合成了以药物恩诺沙星(ENRO)为第一配体,邻菲罗啉(Phen)为第二配体的稀土铽药物配合物,采用元素分析、紫外光谱、红外光谱法初步表征配合物结构,并对其荧光性质进行了考察.结果显示,配体与稀土铽离子之间发生了配位,生成了新的稀土配合物;配合物荧光光谱中显示出铽离子的4个特征峰,发出绿色荧光,荧光性较好;发射光谱中存在较强配体峰,说明能量传递不完全. 展开更多
关键词 稀土配合物 恩诺沙星
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Upconversion Photoluminescence and Energy Transfer Mechanism of a Novel Terbium-mercury Compound 认领
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作者 林维晟 匡汉茂 +1 位作者 罗辉 陈文通 《结构化学》 SCIE CAS CSCD 2019年第6期1012-1020,共9页
A novel terbium-mercury complex [Tb(IA)3(H3 O)2]2 n(2 n HgCl4)(n Hg2 Cl5)·n H3 O· 3 n H2 O(1, HIA = isonicotinic acid) has been synthesized through hydrothermal reactions and characterized by single-crystal ... A novel terbium-mercury complex [Tb(IA)3(H3 O)2]2 n(2 n HgCl4)(n Hg2 Cl5)·n H3 O· 3 n H2 O(1, HIA = isonicotinic acid) has been synthesized through hydrothermal reactions and characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in the C2/c space group of monoclinic system with a = 24.2347(5), b = 20.8342(6), c = 15.3206(3) ?, β = 128.257(2)°, V = 6074.3(2) ?3, C36H41Cl13Hg4N6O20Tb2, Mr = 2458.80, Z = 4, Dc = 2.689 g/cm3, μ(Mo Kα) = 13.014 mm–1 and F(000) = 4520. The crystal structure of 1 is characterized by a one-dimensional(1-D) chain-like structure. Solid-state UV/Vis diffuse reflectance spectrum reveals the existence of a wide optical band gap of 3.36 eV. Solid-state photoluminescence experiment uncovers that it shows reddish brown upconversion emission. The emission bands are originated from the characteristic emission of the 4 f electrons intrashell transition of the 5D4 → 7 FJ(J = 6, 5, 4) of the Tb3+ ions. Energy transfer mechanism is explained by the energy level diagram of the Tb3+ ion and the isonicotinic acid ligand. It shows a remarkable CIE chromaticity coordinates(0.4158, 0.4005). 展开更多
关键词 crystal CIE energy transfer MECHANISM PHOTOLUMINESCENCE TERBIUM
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New environmental-friendly yellow pigments Y4-xAxMoO9+δ(A =Ta,Tb) 认领
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作者 Mengjun Cai Shuaifeng Chen +1 位作者 Xinsheng Ma Jianding Chen 《中国稀土学报:英文版》 SCIE EI CAS CSCD 2019年第7期741-749,共9页
A series of inorganic yellow pigments with general formula Y4-xAxMoO9+δ(A = Ta, Tb), where x = 0,0.05,0.1,0.2, 0.4 for Ta and χ = 0, 0.005, 0.01.0.03, 0.05 for Tb,were synthesized by a conventional ceramic method at... A series of inorganic yellow pigments with general formula Y4-xAxMoO9+δ(A = Ta, Tb), where x = 0,0.05,0.1,0.2, 0.4 for Ta and χ = 0, 0.005, 0.01.0.03, 0.05 for Tb,were synthesized by a conventional ceramic method at 1400 ℃ for 6 h in air. The samples were characterized by XRD,EDS,XPS,SEM,TG-DSC,UV-vis-NIR reflectance spectroscopy and CIE L*a*b* color scales. It is found that the substitution of A(A = Ta, Tb) for Y3+ in Y4 MoO9 decreases the NIR reflectance of the pigment samples, but the developed pigments Y4-xAxMoO9+δ(A = Ta, Tb) still exhibit impressive NIR solar reflectance. The brighter yellow color of inorganic pigments Y4-xAxMoO9+δ(A = Ta, Tb) is available when x is about 0.1 for Ta and 0.01 for Tb. The results make them a series of potential candidates as ecological yellow pigments because of their high reflectance, lightness, intense coloration and excellent thermal and chemical stability. 展开更多
关键词 YTTRIUM OXIDE Molybdenum OXIDE TANTALUM OXIDE TERBIUM OXIDE INORGANIC yellow PIGMENT Rare earths
锌型复合无机抗菌材料的制备及性能研究 认领 被引量:2
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作者 毛华明 张彬 +3 位作者 唐晓宁 蒋先发 叶孟婕 杨苏娥 《人工晶体学报》 EI CAS 北大核心 2019年第3期505-513,共9页
运用溶胶-凝胶法制备出二氧化硅载体,采用液相浸渍法制备得到锌型复合无机抗菌材料。结合响应曲面方法,考察了Zn2+浓度、p H和Tb3+浓度对材料抗菌率的影响,选取了较优制备条件:Zn2+浓度为0.3 mol·L^-1,pH值为9,Tb3+浓度为0.01 mol&... 运用溶胶-凝胶法制备出二氧化硅载体,采用液相浸渍法制备得到锌型复合无机抗菌材料。结合响应曲面方法,考察了Zn2+浓度、p H和Tb3+浓度对材料抗菌率的影响,选取了较优制备条件:Zn2+浓度为0.3 mol·L^-1,pH值为9,Tb3+浓度为0.01 mol·L^-1。以大肠杆菌为菌种,通过稀释涂布平板法,对材料进行抗菌性能检测,抗菌结果表明,掺杂Tb3+后材料抗菌率从76%提高到97%,较优样的最小杀菌浓度为5.5 g/L。通过XRD、FTIR、SEM、EDS和BET方法对材料的结构进行表征,结果表明:载体二氧化硅为无定形态,材料中主要的抗菌成分是纤锌矿结构的Zn O,且呈絮状和花瓣状生长,锌元素质量分数为16.96%,掺杂铽元素后材料的比表面积明显增大,增加了材料与细菌的接触面积,从而抗菌性能显著提高。 展开更多
关键词 二氧化硅 溶胶-凝胶法 抗菌材料
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Characterization of Fluoride Phosphors for Diode Pumped Solid-State Lighting Applications 认领
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作者 Bommareddi Rami Reddy Kristopher Liggins Vernessa M. Edwards 《光学与光子学期刊(英文)》 2018年第8期288-300,共13页
Phosphor coated diodes are critical to the lighting industry. Rare-earth doped fluoride phosphors are characterized in this work. Spectroscopy and lifetime measurements of CaF2: Dy3+, LaF3: Eu3+ and Tb3+-doped LaF3 an... Phosphor coated diodes are critical to the lighting industry. Rare-earth doped fluoride phosphors are characterized in this work. Spectroscopy and lifetime measurements of CaF2: Dy3+, LaF3: Eu3+ and Tb3+-doped LaF3 and CaF2 crystals were performed by irradiating the samples with 405 and 375 nm diode lasers. Chromaticity diagrams are developed from spectral measurements. Dy3+-doped CaF2 revealed bright white light emission having peaks at 492, 570 and 654 nm. The measured color coordinates are x = 0.322 and y = 0.340 for Dy3+-doped CaF2 and these values are close to those of sunlight and the coordinated color temperature is 6147 K, under 405 m laser excitation. Eu3+-doped LaF3 revealed twenty emission peaks in the visible wavelength region. The color coordinates measured for LaF3: Eu3+ are x = 0.283 and y = 0.293 under 405 nm diode laser excitation and the color temperature is 9557 K. Eu3+-doped LaF3 provides cool white-light, under 405 nm diode laser excitation. Tb3+-doped fluoride crystals revealed bright white light under low power diode laser excitation. The measured color coordinates for Tb3+-doped CaF2 are x = 0.329 and y = 0.558 and the color temperature is 7713 K. The color coordinates for LaF3: Tb3+ are x = 0.342 and y = 0.365 and the coordinated color temperature is 5370 K. These values are close to those of sunlight. 展开更多
关键词 Rare-Earth Spectroscopy WHITE-LIGHT Emission COLOR Coordinates Coordinated COLOR Temperature FLUORIDE Materials Laser Induced Fluorescence EUROPIUM TERBIUM DYSPROSIUM Ions
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