Catch-Release System for Dosing and Recycling Silver(I) Catalyst with Status of Catalytic Activity Reported by Fluorescence.
Catch-Release System for Dosing and Recycling Silver(I) Catalyst with Status of Catalytic Activity Reported by Fluorescence.
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DOI：
10.1021/jacs.9b01182
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发表时间：
2019-03
影响因子：
15
通讯作者：
Indrajit Paul;Nikita Mittal;Soumen De;M. Bolte;M. Schmittel
中科院分区：
文献类型：
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作者：
Indrajit Paul;Nikita Mittal;Soumen De;M. Bolte;M. Schmittel
银(I)捕获释放系统由纳米开关1和附蒽冠醚2组成，由化学触发和离子转移驱动。银(I)易位的任何状态都是由472和554nm的比例发射信号自我报告的。在自分类的网络态I中，银离子被紧密地屏蔽在纳米开关[Ag(1)]+（“catch”）中，因此它们的催化活性为零，而在554 nm处的发射量最大。锌（II）的加入使银(I)从[Ag(1)]+中释放出来，生成具有催化活性和荧光的配合物[Ag(2)]+。在这种网络状态II（“释放”）下，催化活性和472 nm的发射都是最大的。去除原始触发器可再生网络状态i。在三个原位循环中演示了催化剂的ON/OFF控制和回收。
The silver(I) catch-release system composed of nanoswitch 1 and the anthracene-appended crown ether 2 is infallibly driven by chemical triggers and ion transfer. Any state of the silver(I) translocation is self-reported by a ratiometric emission signature at 472 and 554 nm. In the self-sorted networked state I, the silver(I) ions are tightly shielded inside nanoswitch [Ag(1)]+ ("catch") so that their catalytic activity is zero while emission at 554 nm is maximum. Addition of zinc(II) releases silver(I) from [Ag(1)]+ and generates the catalytically active and fluorescent complex [Ag(2)]+. In this networked state II ("release") both catalytic activity and emission at 472 nm are maximum. Removal of the original trigger regenerates networked state I. ON/OFF control and recycling of catalyst was demonstrated over three in situ cycles.