a****n 发帖数: 3082 | 1 我有一个RIGID 的IONOMER,溶解在D6-ETHANOL中,浓度是1%wt.我
做了H1spectrum. 但是没有得到聚合物的信号,是什么原因呢? |
r******0 发帖数: 2753 | 2
我有一个RIGID 的IONOMER,溶解在D6-ETHANOL中,浓度是1%wt.我
~~~~~~~~~~~~~
Your ionomer has no H.
Just kidding.
【在 a****n 的大作中提到】 : 我有一个RIGID 的IONOMER,溶解在D6-ETHANOL中,浓度是1%wt.我 : 做了H1spectrum. 但是没有得到聚合物的信号,是什么原因呢?
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a****n 发帖数: 3082 | 3
我有一个RIGID 的IONOMER,溶解在D6-ETHANOL中,浓度是1%wt.我
有啊,苯环上.我怀疑1%浓度太低
【在 r******0 的大作中提到】 : : 我有一个RIGID 的IONOMER,溶解在D6-ETHANOL中,浓度是1%wt.我 : ~~~~~~~~~~~~~ : Your ionomer has no H. : Just kidding.
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c****n 发帖数: 134 | 4 Nothing? How about 13C?
1% should be detectable by 1H NMR.
我有一个RIGID 的IONOMER,溶解在D6-ETHANOL中,浓度是1%wt.我
【在 a****n 的大作中提到】 : 我有一个RIGID 的IONOMER,溶解在D6-ETHANOL中,浓度是1%wt.我 : 做了H1spectrum. 但是没有得到聚合物的信号,是什么原因呢?
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o********e 发帖数: 34 | 5 One possible reason is that the relaxation of your H atoms may be too fast for
your
detection time. Usually molecules inside water solution should have long
T1 and T2 time compared to their solid counter-parts. I did not how is
the situation in your case. Typically 1% is more than enough to
be detected by NMR.
我有一个RIGID 的IONOMER,溶解在D6-ETHANOL中,浓度是1%wt.我
【在 c****n 的大作中提到】 : Nothing? How about 13C? : 1% should be detectable by 1H NMR. : : 我有一个RIGID 的IONOMER,溶解在D6-ETHANOL中,浓度是1%wt.我
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b***e 发帖数: 115 | 6 relaxation 如此之短????
【在 o********e 的大作中提到】 : One possible reason is that the relaxation of your H atoms may be too fast for : your : detection time. Usually molecules inside water solution should have long : T1 and T2 time compared to their solid counter-parts. I did not how is : the situation in your case. Typically 1% is more than enough to : be detected by NMR. : : 我有一个RIGID 的IONOMER,溶解在D6-ETHANOL中,浓度是1%wt.我
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