lutetium trifluoromethanesulfonate

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: lutetium trifluoromethanesulfonate
• 英文别名: lutetium(III) trifluoroacetate；lutetium trifluoroacetate
• 化学式: 3C₂F₃O₂*Lu
• 分子量: 514.015
• InChiKey: WYSZQHZGDARUQG-UHFFFAOYSA-M

计算性质

• 辛醇/水分配系数(LogP)：
  -0.7
• 重原子数：
  8.0
• 可旋转键数：
  0.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  40.13
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为反应物：
  描述：

  lutetium trifluoromethanesulfonate 、 lithium trifluoroacetate 在 oleic acid 、 1-octadecene 作用下， 以 neat (no solvent) 为溶剂， 生成 lithium lutetium fluoride
  参考文献：
  名称：

  衍生自三氟乙酸金属盐前体的旋光性均匀的钾和锂稀土氟化物纳米晶体。

  摘要：

  本文报道了具有不同形状（立方KLaF4和KCeF4蠕虫状纳米线，纳米立方体和纳米多面体;立方LiREF4（RE = Pr to Gd，Y）纳米多面体;通过在热油酸/油胺/ 1-中共同加热Li（CF3COO）或K（CF3COO）和RE（CF3COO）3共同热解四方LiREF4（RE = Tb对应Lu，Y）菱形纳米板）十八碳烯溶液。已经详细研究了溶剂组成，反应温度和时间对制备的纳米晶体的晶相纯度，形状和尺寸的影响。发现单分散纳米晶体的形成在很大程度上取决于从Li到K的碱金属以及从La到Lu和Y的稀土系列的性质。基于一系列的实验结果，还提出了一种受控增长机制。另外，评估了为设计的发光特性掺杂这些刚合成的主体纳米晶体的难易程度。例如，单分散和单晶掺杂Eu3 +的KGdF4，Yb3 +和Er3 +共掺杂的LiYF4纳米晶体重新分散在环己烷中，在紫外（UV）激发和近红外（NIR）980 nm激光激发下分别显示可见的室温红色和绿色发射。

  DOI：

  10.1039/b909145a
• 作为产物：
  描述：

  lutetium(III) oxide 、 三氟乙酸 以 水 为溶剂， 生成 lutetium trifluoromethanesulfonate
  参考文献：
  名称：

  水分散性无配体的稀土氟化物纳米粒子：水转移与NaREF4-to-REF3相变。

  摘要：

  含油酸酯封端的10 nm以下α-和β-NaREF4NPs的化学稳定性（RE = Y，Pr，Nd，Sm，Eu，Gd，Tb，Dy，Ho，Er，Yb，Lu对于α-和RE = β-相NPs的Pr，Nd，Sm，Eu，Gd，Tb，Dy在酸性条件下进行评估，该酸性条件用于去除配体以实现水分散性。已经发现，对于如此小的NP，为了使水转移有效并且产生良好分散的无配体的NP，pH必须低于3。与通常认为的NaREF4的良好化学稳定性形成鲜明对比的是，观察到这些条件可能会导致NaREF4 NP相转变为更大的六方或正交相REF3的风险，具体取决于NP的组成。发现α/β-NaREF4和六方/斜方REF3相的热力学稳定性（由RE离子选择决定）与NPs的化学稳定性之间存在相关性。例如，β-NaGdF4NPs保持稳定，而α-NaGdF4NPs相转变成六方GdF3。更一般而言，基于较轻RE离子的NaREF4 NP更倾向于相变，而基于较重RE离子的NaREF4

  DOI：

  10.1039/d0dt01080d

文献信息

• High Nd(III)-Sensitizer Concentrations for 800 nm Wavelength Excitation Using Isotropic Core–Shell Upconversion Nanoparticles
  作者：Carina Arboleda、Sha He、Alexandra Stubelius、Noah J. J. Johnson、Adah Almutairi

  DOI：10.1021/acs.chemmater.8b04057

  日期：2019.5.14

  Upconverting nanoparticles (UCNPs) are potentially useful for biological applications, if they are capable of high-intensity emission. This requires the highest absorption efficiencies of wavelengths not absorbed or scattered by tissues. 800 nm is considered to be a “biobenign” wavelength because it effectively minimizes signal attenuation and reduces detrimental overheating, while maintaining deep tissue penetration. Neodymium (Nd3+) substitution for ytterbium (Yb3+) in lanthanide-based UCNPs successfully shifts  absorption from 980 nm to 800 nm, where water does not show absorption. High Nd3+ concentrations are desired because the more the sensitizer ions, the higher the absorption and thus the upconversion (UC) emission. However, high Nd3+-sensitized UCNPs, above 30 mol % Nd3+, have been limited because of lattice distortions observed in heavily doped core–shell nanoparticles (CS NPs). Here, we overcome this hurdle by introducing a tensile-strained NaLuF4 shell while still ensuring a complete and thicker isotropic shell. We report 50 mol % Nd3+-sensitized CS NPs that effectively release lattice strain between the core and shell. The doping concentration of 50 mol % Nd3+ provided 13-fold UC enhancement compared to CS NPs without Nd3+ in the shell, independent of the activators examined in this study. This exceptional enhancement in UC emission is due to the maintenance of structural uniformity. We demonstrate cell tolerability by PEGylating CS NPs and incubating the NPs with several cell types to show the potential for biological applications.

  上转换纳米粒子（UCNPs）如果能够实现高强度发射，就有可能用于生物应用。这就要求对不被组织吸收或散射的波长具有最高的吸收效率。800 纳米被认为是 "生物无害 "波长，因为它能有效地减少信号衰减，降低有害的过热现象，同时保持深层组织穿透。在以镧为基础的 UCNP 中，钕（Nd3+）替代镱（Yb3+），成功地将吸收从 980 纳米转移到 800 纳米，而水对该波长没有吸收。之所以需要高浓度的 Nd3+，是因为敏化剂离子越多，吸收率就越高，因此上转换（UC）发射也就越高。然而，由于在重度掺杂的核壳纳米粒子（CS NPs）中观察到的晶格畸变，30 mol % Nd3+ 以上的高 Nd3+ 敏化 UCNPs 一直受到限制。在这里，我们通过引入拉伸应变的 NaLuF4 壳来克服这一障碍，同时还确保了完整且较厚的各向同性壳。我们报告了 50 mol % Nd3+ 敏化 CS NPs，它能有效释放核心与外壳之间的晶格应变。与外壳不含 Nd3+ 的 CS NPs 相比，掺杂浓度为 50 摩尔% 的 Nd3+ 可使 UC 增强 13 倍，这与本研究中考察的活化剂无关。这种超常的 UC 发射增强是由于保持了结构的一致性。我们通过 PEG 化 CS NPs 并将其与多种类型的细胞培养，证明了细胞的耐受性，从而展示了其在生物应用方面的潜力。
• Fabrication of a novel nanocomposite Ag/graphene@SiO₂–NaLuF₄:Yb,Gd,Er for large enhancement upconversion luminescence
  作者：Dongguang Yin、Xianzhang Cao、Lu Zhang、Jingxiu Tang、Wenfeng Huang、Yanlin Han、Minghong Wu

  DOI：10.1039/c5dt01059d

  日期：——

  Upconversion nanocrystals have a lot of advantages over other fluorescent materials.

  提高转换纳米晶体相比其他荧光材料有很多优点。
• High-Quality Sodium Rare-Earth Fluoride Nanocrystals:  Controlled Synthesis and Optical Properties
  作者：Hao-Xin Mai、Ya-Wen Zhang、Rui Si、Zheng-Guang Yan、Ling-dong Sun、Li-Ping You、Chun-Hua Yan

  DOI：10.1021/ja060212h

  日期：2006.5.1

  We report a general synthesis of high-quality cubic (alpha-phase) and hexagonal (beta-phase) NaREF4 (RE: Pr to Lu, Y) nanocrystals (nanopolyhedra, nanorods, nanoplates, and nanospheres) and NaYF(4):Yb,Er/Tm nanocrystals (nanopolyhedra and nanoplates) via the co-thermolysis of Na(CF3COO) and RE(CF3COO)3 in oleic acid/oleylamine/1-octadecene. By tuning the ratio of Na/RE, solvent composition, reaction

  我们报告了高质量立方（α 相）和六方（β 相）NaREF4（RE：Pr 到 Lu，Y）纳米晶体（纳米多面体、纳米棒、纳米板和纳米球）和 NaYF(4):Yb 的一般合成, Er/Tm 纳米晶体（纳米多面体和纳米片）通过 Na(CF3COO) 和 RE(CF3COO)3 在油酸/油胺/1-十八碳烯中的共热分解。通过调整 Na/RE 的比例、溶剂组成、反应温度和时间，我们可以控制纳米晶体的相、形状和尺寸。根据其α->β相变行为，沿稀土系列，NaREF4可分为三组（I：Pr和Nd；II：Sm到Tb；III：Dy到Lu，Y）。整个可控合成机制可以从自由能的角度来解释。
• Direct Evidence for Coupled Surface and Concentration Quenching Dynamics in Lanthanide-Doped Nanocrystals
  作者：Noah J. J. Johnson、Sha He、Shuo Diao、Emory M. Chan、Hongjie Dai、Adah Almutairi

  DOI：10.1021/jacs.7b00223

  日期：2017.3.1

  Luminescence quenching at high dopant concentrations generally limits the dopant concentration to less than 1-5 mol% in lanthanide-doped materials, and this remains a major obstacle in designing materials with enhanced efficiency/brightness. In this work, we provide direct evidence that the major quenching process at high dopant concentrations is the energy migration to the surface (i.e., surface quenching) as opposed to the common misconception of cross-relaxation between dopant ions. We show that after an inert epitaxial shell growth, erbium (Er3+) concentrations as high as 100 mol% in NaY(Er)F-4/NaLuF4 core/shell nano crystals enhance the emission intensity of both upconversion and downshifted luminescence across different excitation wavelengths (980, 800, and 658 nm), with negligible concentration quenching effects. Our results highlight the strong coupling of concentration and surface quenching effects in colloidal lanthanide-doped nanocrystals, arid that inert epitaxial shell growth can overcome concentration quenching. These fundamental insights into the photophysical processes in heavily doped nanocrystals will give rise to enhanced properties not previously thought possible with compositions optimized in bulk.
• Highly Luminescent, Visible-Emitting Lanthanide Macrocyclic Chelates Stable in Water and Derived from the Cyclen Framework
  作者：Gaël Zucchi、Anne-Claire Ferrand、Rosario Scopelliti、Jean-Claude G. Bünzli

  DOI：10.1021/ic011121i

  日期：2002.5.1

  Two new tetraazamacrocyclic ligands are designed with the aim of sensitizing the luminescence of Tb(Ill) and Eu(Ill) ions in water: L51,4,7,10-tetrakis[N-(phenacyl)carbamoylmethyl]-1,4,7,10-tetraazacyclododecane} and L6 1,4,7,10-tetrakis[N-(4-phenylphenacyl)carbamoylmethyl]-1,4,7,10-tetraazacyclododecane}. These ligands react with lanthanide trifluoromethanesulfonates to yield stable 1:1 complexes in water (log K = 12.89 +/- 0.15 for EuL5). X-ray diffraction on [Tb(L5)(H2O)](CF3SO3)(3) (P (1) over bar, a = 13,308(3) Angstrom, b = 14.338(3) Angstrom, c = 16.130(3) Angstrom, alpha = 101.37(3)degrees, beta = 96.16(3)degrees, gamma = 98.60(3)degrees) shows the Tb(III) ion lying on a C-4 axis and being 9-coordinate, with one water molecule bound in its inner coordination sphere. The absolute quantum yields are determined in aerated water for the complexes formed with ions used in fluoroimmunoassays (Ln = Sm, Eu, To, and Dy). Large values are found for [Tb(H2O)(L5)](3+) and [Eu(H2O)(L6)](3+), in line with the molecular design of the receptors: 23.1% and 24.7%, respectively. The intense luminescence of these ions results from efficient intersystem crossing and L Ln energy transfer processes, as well as from a suitable shielding of the emitting ions from radiationless deactivation.