Spin-Lattice Relaxation in Metal-Organic Platinum(II) Complexes
Herbert H. H. Homeier, Johann Strasser, Hartmut Yersin
备注:
9 pages, 3 figures (made from 4 .eps files), elsart.cls. Using dvips (dvipsk 5.58f), it may be necessary to manually edit the generated file letter.ps to change in the first line from PS-Adobe-2.0 to PS-Adobe-3.0. Chemical Physics Letters, in press
发表信息:
Chemical Physics Letters, Volume 316, Issue 3-4, 14 January 2000, Pages 280-284
The dynamics of spin-lattice relaxation (slr) of metal-organic Pt(II) compounds is studied. Often, such systems are characterized by pronounced zero-field splittings (zfs) of the lowest-lying triplets. Previous expressions for the Orbach slr process do not allow to treat such splitting patterns properly. We discuss the behavior of a modified Orbach expression for a model system and present results of a fit of the temperature dependence of the spin-lattice relaxation rate of Pt(2-thpy)$_2$ based on the modified expression.
Predictions of photophysical properties of phosphorescent platinum(II) complexes based on ensemble machine learning approach
The University of Hong Kong(香港大学);Hong Kong Quantum AI Lab Limited(香港量子人工智能实验室有限公司);Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China(电子科技大学深圳高等研究院);Northeast Normal University(东北师范大学)
Interplay of Electronic and Geometric Structure Tunes Organic Biradical Character in Bimetallic Tetrathiafulvalene Tetrathiolate Complexes
具有可调单重态-三重态带隙的有机双自由基的合成和设计已经成为重要的研究兴趣的主题,这是由于它们可能的光化学应用以及在分子开关和导体的开发中的使用。最近,四硫富瓦烯四硫醇盐(TTFtt)已被证明在双电离的双金属配合物中表现出这样的有机双自由基特征。在这篇文章中,我们使用高水平的{ \em ab initio}计算询问一系列TTFtt桥联金属配合物的电子结构,解决其双自由基特性和单重-三重态间隙的因素。我们表明,双自由基字符的程度与一个容易测量的实验预测,中央TTFtt C-C键长,它可以描述一个单参数模型,为未来的TTFtt为基础的双自由基化合物和材料的合理设计提供了有价值的见解。
Improved accuracy and transferability of molecular-orbital-based machine learning: Organics, transition-metal complexes, non-covalent interactions, and transition states
Investigation of the luminescence of $\mathrm{[UO_2X_4]^{2-}}$ (X=Cl, Br) complexes in organic phase using time-resolved laser-induced fluorescence spectroscopy and quantum chemical simulations
Theories of phosphorescence in organo-transition metal complexes - from relativistic effects to simple models and design principles for organic light-emitting diodes
Organic-Inorganic Hybrid CH3NH3PbI3 Perovskite Solar Cell Nanoclusters: Revealing Ultra-Strong Hydrogen Bonding and Mulliken Inner Complexes and Their Implication in Materials Design
甲基铵碘化铅(CH 3 NH3 PbI 3)钙钛矿太阳能电池由于其作为光捕获半导体的出色器件基础性能而在太阳能电池技术的光伏历史上产生了显著的突破。虽然在过去的4年里,在固态下对该系统的实验和理论研究已经有了大量的报道,但其基本的团簇物理还有待开发。为此,本研究进行了理论研究,使用DFT-M06-2X/ADZP检查的主要几何,电子,拓扑和轨道性质的CH 3 NH3 PbI 3纳米团簇块。这些集群被发现是异常强烈的约束,与位于93.53和125.11千卡mol-1之间的结合能(超过共价极限,40千卡mol-1),使我们能够表征为超强型的潜在的相互作用。基于此,连同异常高的电荷转移,强烈的超共轭相互作用,复杂的拓扑结构的电荷密度,和短的分子间距离发现,我们已经确定了CH 3 NH3 PbI 3作为Mulliken内配合物。此外,这些后果,以及超强相互作用,在设计新的功能纳米材料进行了简要讨论。在这项研究中获得的各种新的结果并不完全符合那些已经报道的实验(Nat. Commun. 2015,6,7124)和计算上(Chem.Commun.,2015,51,6434; Sci. Rep. 2016,doi:10.1038/srep21687; Chem. Mater. 2016,28,4259; J. Mat. Chem A 2016,4,4728; J. Phys. Chem. Lett…
Facilitated alkali ion transfer at the water 1,2-dichloroethane interphase: Ab-initio calculations concerning alkaline metal cation - 1,10-phenanthroline complexes
Ab Initio Many-Body Perturbation Theory Calculations of the Electronic and Optical Properties of Cyclometalated Ir(III) Complexes
环状Ir(III)化合物是有机发光二极管中作为有机发光体的优选选择。在实践中,被精心设计的配体包围的过渡金属的存在允许发射频率的微调以及器件的良好效率。为了支持新化合物的开发,通常将实验测量与吸收和发射光谱的从头计算进行比较。这些计算的标准方法是具有混合交换和相关泛函的TDDFT,如B3 LYP。由于这些化合物的大小,更复杂的量子化学方法的应用可能具有挑战性。在这项工作中,我们使用多体微扰理论的方法(特别是GW近似的Bethe-Salpeter方程)实施高斯基组,计算准粒子的性质和吸附光谱的六个环状Ir(III)配合物后面TDDFT。在所提出的结果中,我们比较了标准的TDDFT模拟与BSE计算上进行的微扰G 0 W 0和占特征值自洽。此外,为了详细研究DFT起始点的影响,我们集中在Ir(ppy)3从不同的DFT交换和相关势开始进行GW-BSE模拟。