DEVELOPMENT AND EVALUATION OF NOVEL RADICAL-TRAPPING SHEETS COMPOSED MAINLY OF CLAY
DEVELOPMENT AND EVALUATION OF NOVEL RADICAL-TRAPPING SHEETS COMPOSED MAINLY OF CLAY
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以粘土为主的新型自由基捕获片材的开发与评价
DOI：
10.11362/jcssjclayscience1960.13.217
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
T. Ebina
中科院分区：
文献类型：
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作者：
K. Kawasaki;K. Sakakibara;F. Mizukami;T. Ebina
作者主要用一种环保材料天然膨润土生产了新型的自由基捕捉板。使用两种相同的自由基捕获试剂，它们的有效性被确认为在活性自由基捕获方面的高性能。自由基捕捉片制备使用铸造从分散糊，包括粘土和自由基捕捉试剂。将经过季铵离子处理的纯化天然膨润土与两种自由基捕获试剂之一，自旋捕获试剂（α-苯基-N-叔丁基硝酮; PBN）或自由基清除试剂（4-氧代-2，2，6，6-四甲基哌啶1-氧基; 4-氧代-TEMPO·）沿着使用，产生40 μ m厚的柔性自立片。利用电子自旋共振（ESR）研究了该薄片的自由基捕获性能。结果证实了自由基捕获片捕获活性自由基物质的能力，这些活性自由基物质在原始自由基捕获试剂和粘土中都没有观察到。PBN自旋捕获片捕获羟基自由基和羟乙基自由基。该片材提供自由基物质的长期稳定。捕获的自由基在捕获实验后一个多月仍保持活性。4-氧代-TEMPO自由基清除片也捕获两种自由基。在自由基捕获片的X射线衍射（XRD）图案中观察到新的基面反射，这表明在粘土片晶之间插入了自由基捕获试剂。这些自由基捕获片材可能适用于包装、自由基反应催化片材和环境分析。
The authors produced novel radical-trapping sheets mainly from an environmentally friendly material, natural bentonite clay. Using two identical radical-trapping reagents, their effectiveness was confirmed for high performance in active radical trapping. Radical-trapping sheets were prepared using casting from dispersion pastes including clay and radical-trapping reagents. Purified natural bentonite clay that had been treated by quaternary ammonium ions was used along with one of two radical-trapping reagents, a spin-trap reagent (α-phenyl-N-tert-butyl nitrone; PBN) or a radical-scavenging reagent (4-Oxo-2,2,6,6-tetramethylpiperidine 1-Oxyl; 4-Oxo-TEMPO·), yielding 40-μm-thick flexible self-standing sheets. The sheets' radical-trapping performance was investigated using electron spin resonance (ESR). Results confirmed the radical-trapping sheets' capability for capturing active radical species that were observed neither in the original radical trap reagents nor in the clay. The PBN spin-trapping sheet trapped hydroxyl radicals and hydroxyethyl radicals. The sheet provides long-term stabilization of radical species. The trapped radicals remained active more than one month after the trapping experiment. The 4-Oxo-TEMPO radical scavenging sheet also trapped both radicals. New basal-plane reflection was observed in the X-ray diffraction (XRD) pattern of the radical-trapping sheets, suggesting intercalation of radical-trapping reagents between the clay platelet crystals. These radical-trapping sheets might be applicable to packaging, catalytic sheets for radical reactions, and environmental analyses.
硝基氧自由基通过电子转移清除异丙苯过氧自由基的反应
DOI：
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发表时间：
2005
期刊：
Free Radical Biol.Med. 39(S1)
影响因子：
--
作者：
Hiromitsu Yamamoto;Yuta Miyazaki;Hirofumi Takeuchi;Jorg Kreuter;Yoshiaki Kawashima;H. Yamamoto et. al;山本浩充;向井淳治ら;Eriko Tsuji et al.;石坂敏彦ら;Masumi Kataoka et al.;I.Nakanishi et al.;N.Akiyama et al.;S.Manda et al.;W.Hakamata et al.;K.Suzuki et al.;T.Kawashima et al.;K.Fukuhara et al.;T.Kawashima et al.;K.Kawaguchi et al.;I.Nakanishi et al.;T.Kawashima et al.;I.Nakanishi et al.;K.Fukuhara et al.;C.Nishizawa et al.;K.Anzai et al.;I.Nakanishi et al.;T.Kawashima et al.;T.Ozawa et al.;T.Kawashima et al.;I.Nakanishi et al.
通讯作者：
I.Nakanishi et al.