Geometric Complementarity in Assembly and Guest Recognition of a Bent Heteroleptic <i>cis</i>-[Pd<sub>2</sub><b>L</b><sup><b>A</b></sup><sub>2</sub><b>L</b><sup><b>B</b></sup><sub>2</sub>] Coordination Cage
作者:Witold M. Bloch、Yoko Abe、Julian J. Holstein、Claudia M. Wandtke、Birger Dittrich、Guido H. Clever
DOI:10.1021/jacs.6b08694
日期:2016.10.19
assemblies against entropic predisposition, we present the rational assembly of a heteroleptic [Pd2LA2LB2]4+ coordination cage achieved through the geometric complementarity of two carefully designed ligands, LA and LB. With Pd(II) cations as rigid nodes, the pure distinctly angular components readily form homoleptic cages, a [Pd2LA4]4+ strained helical assembly and a [Pd4LB8]8+ box-like structure, both
Anisotropic Dissociation of π-π Stacking and Flipping-Motion-Induced Crystal Jumping in Alkylacridones and Their Dicyanomethylene Derivatives
作者:Takashi Takeda、Tomoyuki Akutagawa
DOI:10.1002/chem.201600794
日期:2016.6.1
2 a,b,d showed crystal‐jumping activity upon heating. This is the first example of thermosalient behavior in a simple aromatic ketone and its derivatives. A systematic investigation of the jumping behavior of derivatives with different alkyl chains by variable‐temperature X‐ray crystal‐structure analyses revealed the mechanism of this phenomenon. Anisotropicdissociation of π stacking in a dimer was
Effect of the substituent position on the electrochemical, optical and structural properties of donor–acceptor type acridone derivatives
作者:Irena Kulszewicz-Bajer、Malgorzata Zagorska、Marzena Banasiewicz、Piotr A. Guńka、Petr Toman、Boleslaw Kozankiewicz、Gabriela Wiosna-Salyga、Adam Pron
DOI:10.1039/d0cp00521e
日期:——
in toluene at different temperatures revealed spectral features indicating a contribution of thermally activated delayed fluorescence (TADF) to the observed spectroscopic behaviour. The measured photoluminescence quantumyields (φ) were higher for solid state films of pure compounds and for their dispersions in solid matrices (zeonex) than those recorded for toluene and dichloromethane solutions of the
Triggered Exchange of Anionic for Neutral Guests inside a Cationic Coordination Cage
作者:Susanne Löffler、Jens Lübben、Lennard Krause、Dietmar Stalke、Birger Dittrich、Guido H. Clever
DOI:10.1021/ja5130379
日期:2015.1.28
cations. The resulting interpenetrated double cage features three consecutive pockets which initially contain one tetrafluoroborate anion, each. Activation of this host system with two halideanions triggers a conformational change that renders the central pocket susceptible to the uptake of small neutral guest molecules. Thereby, the pentacationic cage expels the central anion and replaces it with a
外部触发控制下的分子封装过程在生物信号转导过程和酶催化中起主要作用。在这里,我们提出了一种可控宿主系统的人工模拟,该系统通过由简单的双单齿配体和 Pd(II) 阳离子自组装形成。由此产生的互穿双笼具有三个连续的口袋,每个口袋最初都包含一个四氟硼酸盐阴离子。用两个卤化物阴离子激活这个主体系统会触发构象变化,使中央口袋容易受到小的中性客体分子的吸收。因此,五阳离子笼排出中心阴离子并用中性分子代替它以产生六阳离子物质。通过 X 射线晶体学、ESI MS 和 NMR 技术检查卤化物触发苯结合之前和之后的笼状结构。比较了苯、环己烷和降冰片二烯包封的动力学和热力学。
Endohedral dynamics of push–pull rotor-functionalized cages
作者:Marcel Krick、Julian Holstein、Christian Würtele、Guido H. Clever
DOI:10.1039/c6cc04155h
日期:——
Push–pull-functionalized ligands carrying molecular rotors assemble to [Pd2L4] coordination cages whose endohedral dynamics are controlled by the substitution pattern, solvent effects and guest encapsulation.