The characteristic vibrations of νas(SO3-) in 1 are at 1263, 1184 cm-1, whereas the νs(SO3-) absorption is at 1010 cm-1, both different from that in 4-hydroxypyridone-3-sulfonic acid (νas(SO3-) at 1255, 1176 cm-1 and νs(SO3-) at 1018 cm-1)
其中括号里的νas(SO3-) at 1255, 1176 cm-1 and νs(SO3-) at 1018 cm-1这些波数是怎么知道的？怎么就能确定这就是硫酸官能团的特征波呢？参考什么文献里能查到这些？
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