pH of Water Intercalated into Graphite Oxide as Determined by EPR Spectroscopy

IF 1.1 4区物理与天体物理 Q4 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL

Applied Magnetic Resonance Pub Date : 2022-11-21 DOI:10.1007/s00723-022-01509-4

Tatiana S. Yankova, Natalia A. Chumakova

引用次数: 1

Abstract

Two pH-sensitive spin probes 4-(methylamino)-2-ethyl-5,5-dimethyl-4-pyridine-2-yl-2,5-dihydro-1H-imidazol-1-oxyl (DPI, also known as MEP) and 2,2,3,5,5-pentamethyl-2,5-dihydro-1H-imidazol-1-oxyl (MTI) were used to measure pH of water intercalated in Brodie graphite oxide. The pH value was found to be 2.25 ± 0.05 immediately after adding water to graphite oxide and decreased to 1.75 ± 0.05 during ca. 30 h.

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EPR光谱法测定氧化石墨插层水的pH值

采用4-(甲氨基)-2-乙基-5,5-二甲基-4-吡啶-2-基-2,5-二氢- 1h -咪唑-1-氧基(DPI，又称MEP)和2,2,3,5,5-五甲基-2,5-二氢- 1h -咪唑-1-氧基(MTI)两种pH敏感自旋探针测量了插入Brodie氧化石墨中的水的pH值。在氧化石墨中加水后，pH值立即为2.25±0.05，约30 h后，pH值降至1.75±0.05。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Magnetic Resonance 物理-光谱学

CiteScore

1.90

自引率

10.00%

发文量

审稿时长

2.3 months

期刊介绍： Applied Magnetic Resonance provides an international forum for the application of magnetic resonance in physics, chemistry, biology, medicine, geochemistry, ecology, engineering, and related fields. The contents include articles with a strong emphasis on new applications, and on new experimental methods. Additional features include book reviews and Letters to the Editor.