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首页> 外文期刊>Chemistry: A European journal >Site Distribution in Resin Beads as Determined by Confocal Raman Spectroscopy
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Site Distribution in Resin Beads as Determined by Confocal Raman Spectroscopy

机译：共聚焦拉曼光谱法测定树脂珠的位点分布

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摘要

Scanning confocal Raman spectroscopy was used to study the distribution of reactive sites within a resin bead used for solid-phase synthesis. The distribution of NH_2 groups in aminomethylated polystyrene resin (APS) was determined by doping with varying amounts of 4-cyanobenzoic acid. The extent of loading was determined by both elemental analysis and ninhydrin assays. The spatial distribution of the coupled 4-cyanobenzamide within the bead was determined to an in-plane resolution of 1 #mu#m and depth resolution of about 4 #mu#m, using the strong Raman CN stretching vibrational transition at 2230 cm~(-1). Dry and swollen beads were studied and the distribution was found to be essentially uniform throughout the bead in all cases.
机译：使用扫描共聚焦拉曼光谱法研究用于固相合成的树脂珠粒中反应位点的分布。通过掺杂不同量的4-氰基苯甲酸来确定氨甲基化聚苯乙烯树脂（APS）中NH_2的分布。通过元素分析和茚三酮测定法确定负载的程度。使用2230 cm〜（〜）的强拉曼CN拉伸振动跃迁，确定了偶联的4-氰基苯甲酰胺在微珠内的空间分布，使其面内分辨率为1＃μ＃m，深度分辨率为约4＃μm。 -1）。研究了干燥和溶胀的珠子，发现在所有情况下整个珠子的分布基本均匀。

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