| 查看: 2545 | 回复: 24 | |||
| 【奖励】 本帖被评价16次，作者bobo0621增加金币 14 个 | |||
| 当前主题已经存档。 | |||
[资源]
文献NMR-double_water_peaks（两水峰和水峰裂分的原因）
|
|||
|
分享文献一篇 NMR Solvents The Observation of “Double Water Peaks” in Deuterated NMR Solvents 内容介绍： Generally speaking, water takes three forms in a deuterated solvent environment: HOH, HOD, and DOD. In the proton NMR spectrum of a pure NMR solvent, both the HOH and HOD peaks are observed, but not the DOD. In a proton NMR Spectrum, HOH appears as a singlet. However, due to coupling from the D nucleus which has a nuclear spin quantum number I = 1, HOD appears as a triplet. The observed splitting 2JHD of the HOD peak is about 1-2 Hz. The chemical environments of the protons in HOH and HOD are similar, but not identical. Therefore, the HOH and HOD peaks appear to be close in chemical shift, but not overlapped. They are typically 0.03 ppm apart. HOD Peaks - NMR spectra of “neat” deuterated solvent always exhibit a peak due to H20 in addition to the residual solvent peak. When the exchange rate between H20 and HDO is slow on the NMR timescale the water peak appears as two peaks, a singlet corresponding to H20 and a 1:1:1 triplet corresponding to HDO. 自我评价： 本帖主要讲水峰裂分的原因。和两个水峰的原因。 具体内容见附件。或者点击以下网址下载http://www.sigmaaldrich.com/etc/ ... ble_water_peaks.pdf 有用的话请大家跟帖支持，谢谢 [ Last edited by bobo0621 on 2009-1-8 at 22:40 ] |
回复此楼» 猜你喜欢
梁成伟老师课题组欢迎你的加入
已经有11人回复
-
复试调剂
已经有6人回复
-
0703化学调剂 ，六级已过，有科研经历
已经有11人回复
-
0856调剂，是学校就去
已经有4人回复
-
321求调剂
已经有10人回复
-
东华理工大学化材专业26届硕士博士申请
已经有8人回复
-
288求调剂
已经有11人回复
-
【考研调剂】化学专业 281分，一志愿四川大学，诚心求调剂
已经有5人回复
-
能源材料化学课题组招收硕士研究生8-10名
已经有12人回复
-
0703化学调剂
已经有4人回复
2楼2008-12-22 22:23:43
内容介绍：
|
内容介绍： Generally speaking, water takes three forms in a deuterated solvent environment: HOH, HOD, and DOD. In the proton NMR spectrum of a pure NMR solvent, both the HOH and HOD peaks are observed, but not the DOD. In a proton NMR Spectrum, HOH appears as a singlet. However, due to coupling from the D nucleus which has a nuclear spin quantum number I = 1, HOD appears as a triplet. The observed splitting 2JHD of the HOD peak is about 1-2 Hz. The chemical environments of the protons in HOH and HOD are similar, but not identical. Therefore, the HOH and HOD peaks appear to be close in chemical shift, but not overlapped. They are typically 0.03 ppm apart. HOD Peaks - NMR spectra of “neat” deuterated solvent always exhibit a peak due to H20 in addition to the residual solvent peak. When the exchange rate between H20 and HDO is slow on the NMR timescale the water peak appears as two peaks, a singlet corresponding to H20 and a 1:1:1 triplet corresponding to HDO. 自我评价： 本帖主要讲水峰裂分的原因。或两个水峰的原因。 [ Last edited by bobo0621 on 2008-12-23 at 13:45 ] |
3楼2008-12-23 10:15:08
4楼2008-12-23 10:51:02
5楼2008-12-23 11:33:07
新链接，可单击下载
|
因为考虑到大家下载需要金币，故我又找了一个链接，大家可以单击下载 http://www.sigmaaldrich.com/etc/ ... ble_water_peaks.pdf 如果好的话，请多多支持，谢谢 |
6楼2008-12-23 14:17:15
7楼2008-12-25 17:39:32
8楼2008-12-25 20:20:36
9楼2008-12-26 13:14:09
10楼2008-12-28 14:10:48
12楼2008-12-30 10:24:30
15楼2008-12-30 15:36:27
16楼2009-01-01 17:11:44
18楼2009-01-06 07:42:34
19楼2009-01-06 19:26:47
20楼2009-01-09 22:12:47
21楼2009-01-12 20:49:38
23楼2009-03-05 04:32:47
24楼2009-03-09 22:47:22
简单回复
企鹅721111楼
2008-12-28 21:32
回复
顶！！！！
zhwj13楼
2008-12-30 11:55
回复
seusioc14楼
2008-12-30 12:42
回复
谢谢分享!
明月飞光17楼
2009-01-06 00:24
回复
chxidongn22楼
2009-01-13 07:34
回复
success85925楼
2009-03-29 18:57
回复
