Coordination-driven self-assembly of three-dimensional supramolecular dendrimers.

Coordination-driven self-assembly of three-dimensional supramolecular dendrimers.
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DOI:
10.1021/ic100330c
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发表时间:
2010-06-07
影响因子:
4.6
通讯作者:
Stang, Peter J.
Stang, Peter J.
中科院分区:
化学2区
文献类型:
--
作者:
Zheng, Yao-Rong;Ghosh, Koushik;Yang, Hai-Bo;Stang, Peter J.

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描述了新型 3-D 超分子树枝状聚合物的设计和合成。 120°二铂受体和带有[G-0]–[G-3] Fréchet型树突的三位吡啶基供体的配位驱动自组装在温和条件下产生了一系列超分子树枝状聚合物,具有形状和尺寸明确的坚固金刚烷类核心。使用多核(31P和1H)NMR光谱和电喷雾电离(ESI)质谱以及脉冲场梯度自旋回波(PGSE)NMR测量和计算模拟来鉴定组件。同位素解析的质谱数据支持金刚烷类树枝状聚合物的[6+4]组装体的存在,并且NMR结果与这些对称组装体的形成一致。 PGSE NMR 测量与 MMFF 力场模型清楚地揭示了不同尺寸的 3-D 超分子树枝状聚合物的结构特征。
The design and synthesis of novel 3-D supramolecular dendrimers is described. Coordination-driven self-assembly of a 120° diplatinum acceptor and tritopic pyridyl donors bearing [G-0]–[G-3] Fréchet-type dendrons results in a series of supramolecular dendrimers under mild conditions, possessing a robust adamantanoid core of well-defined shape and size. The assemblies were identified using multinuclear (31P and 1H) NMR spectroscopy and electrospray ionization (ESI) mass spectrometry, as well as pulsed field gradient spin-echo (PGSE) NMR measurement together with computational simulations. Isotopically resolved mass spectral data support the existence of the [6 + 4] assembly of adamantanoid dendrimers, and the NMR results are consistent with the formation of these symmetrical assemblies. PGSE NMR measurements together with MMFF force-field modeling clearly reveal the structural feature of the 3-D supramolecular dendrimers with varying sizes.
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