Mechanical Stirring Induces Heteroaggregate Formation and Self-assembly of Pseudoenantiomeric Oxymethylene Helicene Oligomers in Solution
Mechanical Stirring Induces Heteroaggregate Formation and Self-assembly of Pseudoenantiomeric Oxymethylene Helicene Oligomers in Solution
复制标题
机械搅拌诱导溶液中假对映体甲醛螺旋烯低聚物的异聚集体形成和自组装
DOI：
10.1002/slct.201700303
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发表时间：
2017
期刊：
影响因子：
2.1
通讯作者：
Masahiko Yamaguchi
中科院分区：
文献类型：
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作者：
Tsukasa Sawato;Nozomi Saito;Masanori Shigeno;Masahiko Yamaguchi
假对映体氧甲基螺旋烯(P) -五聚体和(M) -六聚体的混合物在25°C的溶液中机械搅拌后形成异质聚集体并自组装。在不搅拌的情况下不发生聚集，在高搅拌速率下异聚集加速。反复交替的机械搅拌和停止分别诱导和停止异质聚集。超声波也促进了异质聚集，这在高压或离心过程中不会发生。考虑了由于机械搅拌而产生的局部和时间高温域的摩擦机制。结果表明，不同的机械刺激方法，即搅拌和表面接触，可诱导对映体异质聚集体的形成。
A mixture of pseudoenantiomeric oxymethylene helicene (P)‐pentamers and (M)‐hexamers formed heteroaggregates and self‐assembled as a result of mechanical stirring in solution at 25 °C. No aggregation occurred without stirring, and heteroaggregation was accelerated at high stirring rates. Repeatedly alternating between mechanical stirring and stopping respectively induced and then ceased the heteroaggregation. Sonication also promoted the heteroaggregation, which did not occur at high pressures or during centrifugation. Mechanisms based on friction due to mechanical stirring, which generated local and temporal high‐temperature domains, are considered. It is shown that different methods of mechanical stimulation, namely, stirring and surface contact, induce enantiomeric heteroaggregate formation.