Relaxation rates for spirocyclohexyl nitroxyl radicals are suitable for interspin distance measurements at temperatures up to about 125 K
Relaxation rates for spirocyclohexyl nitroxyl radicals are suitable for interspin distance measurements at temperatures up to about 125 K
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DOI：
10.1039/b817758a
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发表时间：
2009-01-01
影响因子：
4.9
通讯作者：
Eaton, Gareth R.
中科院分区：
文献类型：
--
作者：
Kathirvelu, Velavan;Smith, Christopher;Eaton, Gareth R.
在65 - 175 K之间，在哌啶环的2-和6-位上具有螺环己基的硝酰基自由基表现出比目前用作自旋标记的具有2，5-偕-二甲基或2，6-偕-二甲基取代基的硝酰基自由基慢的自旋回波失相速率，并且足够慢以允许在高达约125 K的温度下对具有类似环结构的自旋标记进行DEER测量。
Between 65 and 175 K, nitroxyl radicals with spirocyclohexyl groups at the 2- and 6-positions of the piperidine ring exhibit spin echo dephasing rates that are slower than for nitroxyl radicals with 2,5-gem-dimethyl or 2,6-gem-dimethyl substituents that are currently used as spin labels, and are slow enough to permit DEER measurements at temperatures up to about 125 K for spin labels with analogous ring structures.