Modulating metallopolymer mechanical properties by controlling metal ligand crosslinking
Modulating metallopolymer mechanical properties by controlling metal ligand crosslinking
复制标题
通过控制金属配体交联来调节金属聚合物的机械性能
DOI：
10.1002/pola.28994
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Silberstein, Meredith N.
中科院分区：
文献类型：
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作者：
Vidavsky, Yuval;Bae, Suwon;Silberstein, Meredith N.
介绍氢键、疏水相互作用和金属-配体相互作用(中性和离子)等非共价相互作用在天然体系1、2和合成材料中都能形成网络。3-6这些非共价网络可以潜在地模拟经典的共价网络行为，如在良好溶剂存在下的大变形和膨胀的弹性恢复，7，8，同时具有吸引人的性质，如自我愈合，9，10可加工性，11，12能量吸收，13自组装，14和刺激响应性。这种类共价和动态性质的组合是通过调节网络连接的动态来实现的。尤其是金属聚合物，由于其可能的机械性能、合成方法和加工工艺，在过去的二十年里引起了人们的极大关注。金属聚合物是高度可定制的，因为除了单体选择、相对分子质量和结构等常规聚合物控制旋钮外，金属聚合物还可以通过金属络合物在聚合物结构中的结合位置(即作为交联剂、侧链取代基或线性主链的一部分)以及金属阳离子和配体化学的类型来区分。17金属络合物在机械力作用下抵抗断裂的强度已被证明对金属聚合物的力学行为有很大影响。19-21通过巧妙地设计超分子聚合物，用不同的金属19、20、22或不同的配体21、23合成的金属聚合物表现出不同的有机金属相互作用，从而导致不同的刚性、韧性和粘弹性耗散。这些不同的机械行为也可以受到外部刺激的控制。Holten-Andersen和Meyer的小组展示了如何通过改变金属水凝胶中的pH，8金属的氧化状态来改变金属水凝胶中的金属-配体相互作用，24或
INTRODUCTION Noncovalent interactions such as hydrogen bonds, hydrophobic interaction, and metal–ligand interactions (neutral and ionic) enable networks in both natural systems1, 2 and synthetic materials. 3–6 These noncovalent networks can potentially mimic classical covalent network behaviors such as elastic recovery from large deformation and swelling in the presence of good solvents, 7, 8 while boasting appealing properties such as self-healing, 9, 10 processability, 11, 12 energy absorption, 13 self-assembly, 14 and stimuli responsiveness. 15, 16 This combination of covalent-like and dynamic properties is accomplished by tuning the dynamics of the network connections. Metallopolymers in particular have attracted much attention in the past two decades due to their possible mechanical properties, synthetic methodologies, and processing. 17, 18 Metallopolymers are highly customizable since in addition to normal polymer control knobs such as monomer selection, molecular weight and architecture, metallopolymers can be differentiated by where the metal complexes are bound in the polymer architecture (ie, as crosslinkers, side chain substituent, or part of a linear backbone), and by the type of metal cation and ligand chemistry. 17The strength of the metal complex to resist breaking under mechanical force has been shown to strongly influence the mechanical behavior of metallopolymers. 19–21 It was demonstrated that by clever design of supramolecular polymers, metallopolymers synthesized with different metals19, 20, 22 or different ligands21, 23 presented diverse organometallic interactions that lead to different stiffness, toughness, and viscoelastic dissipation. These distinct mechanical behaviors can also be controlled by external stimuli. The groups of Holten–Andersen and Meyer showed how changing metal–ligand interactions in metallo-hydrogels by changing the pH, 8 the oxidation state of the metals with UV exposure, 24 or
醋酸二氨铜Cu(CH3COO)2·2NH3晶体结构的精化
DOI：
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发表时间：
2009
期刊：
影响因子：
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作者：
H. Euler;H. Kutzke;B. Barbier;A. Kirfel
通讯作者：
A. Kirfel
影响因子：
15
作者：
Rao, Ying-Li;Chortos, Alex;Bao, Zhenan
通讯作者：
Bao, Zhenan
影响因子：
29.4
作者：
Bode, Stefan;Zedler, Linda;Schubert, Ulrich S.
通讯作者：
Schubert, Ulrich S.