s*******c
发帖数: 179 | 1 plus a proton, +1.007276 |
|
s********n
发帖数: 235 | 2 itle: PROTON CONDUCTION IN LAYERED PEROVSKITE OXIDES
Author(s): THANGADURAI V, SHUKLA AK, GOPALAKRISHNAN J
Source: SOLID STATE IONICS Volume: 73 Issue: 1-2 Pages: 9-14
Published: OCT 1994
thanks a lot!
x********[email protected] |
|
s********n
发帖数: 235 | 3 Title: AA ' 2M3O10 (A = K, Rb, Cs; A ' = Ca; M = Nb) layered perovskites:
low-temperature proton conductors in hydrogen atmospheres
Author(s): Thangadurai, V; Weppner, W
Source: JOURNAL OF MATERIALS CHEMISTRY Volume: 11 Issue: 2 Pages: 636-
639 Published: 2001
Title: Synthesis and electrical properties of K- and Pr-substituted LaGaO3
and LaInO3 perovskites
Author(s): Thangadurai, V; Weppner, W
Source: JOURNAL OF THE ELECTROCHEMICAL SOCIETY Volume: 148 Issue: 12
Pages: A1294-A1301 |
|
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p*******8
发帖数: 158 | 5 See Guassian03 manual to find more.
You can calculate H,C chemical shift from those data with respective
standard compounds.
If you can compute intensities of each proton, then you will draw a spectrum
using excel or else. |
|
f*******y
发帖数: 50 | 6 for polymer, the T1 will be much shorter, you can try T1 test and I guess
it may be less than 3s. The solvent peak normally is the longest t1 peak.
And if you need quantitative, you need five times t1 and for carbon
experiments, you need to supress NOE and just use nny for decoupling proton. |
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w*****k
发帖数: 177 | 7 it could be confirmed, the proton at the a/e position would have different
chemical shift, and i forget which one would be in a lower shift. |
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s********n
发帖数: 235 | 8 High proton conduction in grain-boundary-free yttrium-doped barium zirconate
films grown by pulsed laser deposition
Author(s): Pergolesi D (Pergolesi, Daniele)1,2,3, Fabbri E (Fabbri, Emiliana
)1,2,3, D'Epifanio A (D'Epifanio, Alessandra)1,2, Di Bartolomeo E (Di
Bartolomeo, Elisabetta)1,2, Tebano A (Tebano, Antonello)4,5, Sanna S (Sanna,
Simone)1,2, Licoccia S (Licoccia, Silvia)1,2, Balestrino G (Balestrino,
Giuseppe)4,5, Traversa E (Traversa, Enrico)1,2,3
Source: NATURE MATERIALS Volume: 9 ... 阅读全帖 |
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s********n
发帖数: 235 | 9 Title: ELECTROCHEMICAL REDUCTION OF CARBON-DIOXIDE IN LOW PROTON MEDIA
Author(s): GRESSIN JC, MICHELET D, NADJO L, et al.
Source: NOUVEAU JOURNAL DE CHIMIE-NEW JOURNAL OF CHEMISTRY Volume: 3
Issue: 8-9 Pages: 545-554 Published: 1979
Many thanks!
x********[email protected] |
|
s********n
发帖数: 235 | 10 Title: ELECTROCHEMISTRY OF CARBON-DIOXIDE
Author(s): SAVEANT JM
Source: DENKI KAGAKU Volume: 59 Issue: 6 Pages: 463-463 Published:
JUN 1991
Title: ON THE ELECTROCHEMICAL REDUCTION OF CARBON-DIOXIDE
Author(s): AMATORE C, NADJO L, SAVEANT JM
Source: NOUVEAU JOURNAL DE CHIMIE-NEW JOURNAL OF CHEMISTRY Volume: 8
Issue: 10 Pages: 565-566 Published: 1984
Title: MECHANISM AND KINETIC CHARACTERISTICS OF THE ELECTROCHEMICAL
REDUCTION OF CARBON-DIOXIDE IN MEDIA OF LOW PROTON AVAILABILITY
Au... 阅读全帖 |
|
w*q
发帖数: 1294 | 11 Title: MECHANISM AND KINETIC CHARACTERISTICS OF THE ELECTROCHEMICAL
REDUCTION OF CARBON-DIOXIDE IN MEDIA OF LOW PROTON AVAILABILITY
Author(s): AMATORE C, SAVEANT JM
Source: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY Volume: 103 Issue: 17
Pages: 5021-5023 Published: 1981
http://www.sendspace.com/file/v4e05z |
|
s********n
发帖数: 235 | 12 Title: MECHANISM AND KINETIC CHARACTERISTICS OF THE ELECTROCHEMICAL
REDUCTION OF CARBON-DIOXIDE IN MEDIA OF LOW PROTON AVAILABILITY
Author(s): AMATORE C, SAVEANT JM
Source: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY Volume: 103 Issue: 17
Pages: 5021-5023 Published: 1981
Many thanks!
x********[email protected] |
|
s********n
发帖数: 235 | 13 Title: Proton conductivity of CsH2PO4 center dot WPA composites at
intermediate temperatures
Author(s): Insani EK, Nguyen V, Kawamura G, et al.
Conference Information: 3rd Nanoscience and Nanotechnology Symposium 2010,
JUN 16, 2010 Inst Teknologi Bandung, Bandung, INDONESIASource: THIRD
NANOSCIENCE AND NANOTECHNOLOGY SYMPOSIUM 2010 - NNSB2010 Book Series: AIP
Conference Proceedings Volume: 1284 Pages: 42-45 Published: 2010
Many thanks!
x********[email protected] |
|
B*****n
发帖数: 654 | 14 Progress in proton conductive materials
By Shi, Wanyu; Lu, Jianshu
From Huagong Xinxing Cailiao (2010), 38(4), 6-9. Language: Chinese, Database |
|
d****i
发帖数: 360 | 15 Carbon-13 and Proton Nuclear Magnetic Resonance Spectra of Veratrum
Alkaloids
First PageHi-Res PDF[420 KB]Citing ArticlesWilliam Gaffield, Mabry Benson,
Robert E. Lundin, Richard F. Keeler
J. Nat. Prod., 1986, 49 (2), pp 286–292
Thanks a lot! |
|
f*********e
发帖数: 1144 | 16 请教一下：
我有俩peptide, Positive mode死活出不来，想试一下negative mode,500-3500 m/z
range
1. 用什么matrix阿？如果跟positive mode一样，要不要加什么东西help
deprotonated阿？
2. 有什么经验比如什么样AA组成的tryptic digested peptide不容易protonated,适合
negative mode呢?
多谢！ |
|
|
t******t
发帖数: 3045 | 18 是什么状态的离子
溶液中的离子都是水合的，让离子过也就带着水过了
气态的离子和水很容易分，加个电场就分开了
也有proton exchange membrane, 左边进水，右边出H+ |
|
s*****0
发帖数: 244 | 19 Paper 1:
R. K. Salinas, L. Bruschweiler-Li, E. Johnson, and R. Bruschweiler
Ca2+ Binding Alters the Interdomain Flexibility between the Two Cytoplasmic
Calcium-binding Domains in the Na+/Ca2+ Exchanger
J. Biol. Chem., September 16, 2011; 286(37): 32123 - 32131.
http://www.jbc.org/content/286/37/32123.full
Paper 2:
L. Boyman, B. M. Hagen, M. Giladi, R. Hiller, W. J. Lederer, and D.
Khananshvili
Proton-sensing Ca2+ Binding Domains Regulate the Cardiac Na+/Ca2+ Exchanger
J. Biol. Chem., August 19, ... 阅读全帖 |
|
s********n
发帖数: 235 | 20 Title: PLAUSIBLE CONCEPTS NECESSARY AND SUFFICIENT FOR INTERPRETATION OF
CERAMIC GRAIN-BOUNDARY PHENOMENA .1. GRAIN-BOUNDARY CHARACTERISTICS,
STRUCTURE, AND ELECTROSTATIC POTENTIAL
Author(s): KINGERY WD
Source: JOURNAL OF THE AMERICAN CERAMIC SOCIETY Volume: 57 Issue: 1
Pages: 1-8 DOI: 10.1111/j.1151-2916.1974.tb11350.x Published: 1974
Title: PLAUSIBLE CONCEPTS NECESSARY AND SUFFICIENT FOR INTERPRETATION OF
CERAMIC GRAIN-BOUNDARY PHENOMENA-II, SOLUTE SEGREGATION, GRAIN-BOUNDARY
DIFFUSIO... 阅读全帖 |
|
R*****U
发帖数: 241 | 21 忽悠？ proton 那家公司，我知道的很少。 |
|
t******t
发帖数: 3045 | 22 不好说
hydroxyl+hydroxyl
or hydroxyl+carbonyl |
|
K*********e
发帖数: 183 | 23 negative mode 应该是开环后才好有efficiency把, 我猜的.
这个分子应该会有失去水的峰.
该分子用Positive mode也会有强峰的. |
|
k****o
发帖数: 728 | 24 是审的一个稿里这么说的。说negative mode信号更强。确实MS2会掉H2O，然后掉CO和
CO2。我查到另一篇文献，是这个化合物的sofonate衍生物，也是说negative mode信号
更强。 |
|
|
K*********e
发帖数: 183 | 26 negative mode信号是会更强,因为是酸呀. 只是形成五元环了. |
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j*****d
发帖数: 60 | 27 我靠，没一个回答靠谱的。鸡公公不在，这般的水平咋跌成这样了。都成酯了还酸呢。
本科学生物或文科的吧？
醇脱水不是很常见吗。上边那个醇脱水形成共轭双键多好啊，左边那个醇也很容易脱水
。只有底下那个醇无法脱水，因为没有灵位氢。
这个分子负离子强是因为醇的酸性，尤其是上边那个，脱质子后和双键共轭而稳定 |
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p*****1
发帖数: 330 | 28 首先，如果只有一个OH，应该还是正离子灵敏度高。
有可能丢失水，也可能不丢。 |
|
|
j*****d
发帖数: 60 | 30 Yes, this is someone who knows chemistry more than me. |
|
K*********e
发帖数: 183 | 31 那两个脱水很显然, 我就不用说了. 我这打中文看不到字, 懒的多说.
还有两个问题请教: 1: "尤其是上边那个，脱质子后和双键共轭而稳定". 我怎么觉得
哪个电子在O上比在C上好呢? 难道我理解错了. 虽然说可以形成共轭双键, 但这对电子
并不能在共轭双键上移动, 所以这个
共轭意义不大, 如果我错了, 请纠正.
2. (I can't type Chinese anymore suddenly). LZ said the paper says that the
compound lost CO or CO2, that also means the 5-member ring actually is
opened under basic condition. Am I wrong?
Thanks a lot! |
|
f********e
发帖数: 2194 | 32 positive 不一定有强峰，羟基的碱性太弱 |
|
|
f********e
发帖数: 2194 | 34 说的很好，只是对最后一句持保留意见，上面的羟基脱了质子也不会和那个双键共轭，
除非那个双键发生重排到环内 |
|
f********e
发帖数: 2194 | 35 1.不知道你想问什么，共轭双键比稳定就够了。不稳定到稳定就是脱水的动力。
2.环肯定没有开。首先这个内酯就可以脱co or co2，但是羧酸就不能脱co；其次如果
环开了，准分子离子峰的分子量和闭环的是不一样的
the |
|
K*********e
发帖数: 183 | 36 打了好一会儿, 全部没了. 改用英文把. 打中文我不行, 太话时间了.
1. The top -OH lost with the neighboring -H, it forms the conjugate, that is
very stable. But what I meant is when it lost H on that OH, it will not
form conjugate. Maybe I misinterpreted it.
2. Thank you for telling me the 内酯 can lose CO directly, I forgot that.
But when it lose CO2, the ring opened, no ring is there anymore, right?
3. I dealt with a similar molecule which is more acidic than this one, it is
OK in Positive mode. So I thought this molecule sho... 阅读全帖 |
|
j*****d
发帖数: 60 | 37 我只想开个玩笑，但没有幽默感，用词可能过了点，请见谅。
1.我化学就是个半吊子，随便说了一句。上边那个有个sexy图像的兄弟/姐妹教会了我
allylic alcohol 一词，他一定能回答这个问题。还有感谢福星高照的回答。他们俩显
然化学比我好，应该会给你一个满意的回答。
2.脱CO2后环开了不能再和上吗？你生生的把两个靠得如此近的孤电子拆散，不让他们
结合，太不仁慈了吧。在我们化学WS撸管男眼里，是可忍孰不可忍。
3.分子是酸性的不代表正离子模式就不行。anyway,底下两个醇也应该是酸性比碱性强
吧，啥时候醇变成碱性了。
is
is |
|
K*********e
发帖数: 183 | 38 It is OK, I can accept that I made mistakes and the fact that I forgot
things I used to know.
OK, I fixed my last question, I will say if it is in acidic condition (
Positive mode), the bottom two -OHs are basic enough to take the H+.
When I was doing my chores, I realized no matter what, alcohol should be
more acidic than basic, it is my bad.
I still have questions, but without the spectra, it is hard to discuss
further.
Thank you anyway. |
|
t******t
发帖数: 3045 | 39 不好说
hydroxyl+hydroxyl
or hydroxyl+carbonyl |
|
k****o
发帖数: 728 | 40 是审的一个稿里这么说的。说negative mode信号更强。确实MS2会掉H2O，然后掉CO和
CO2。我查到另一篇文献，是这个化合物的sofonate衍生物，也是说negative mode信号
更强。 |
|
|
j*****d
发帖数: 60 | 42 我靠，没一个回答靠谱的。鸡公公不在，这般的水平咋跌成这样了。都成酯了还酸呢。
本科学生物或文科的吧？
醇脱水不是很常见吗。上边那个醇脱水形成共轭双键多好啊，左边那个醇也很容易脱水
。只有底下那个醇无法脱水，因为没有灵位氢。
这个分子负离子强是因为醇的酸性，尤其是上边那个，脱质子后和双键共轭而稳定 |
|
p*****1
发帖数: 330 | 43 首先，如果只有一个OH，应该还是正离子灵敏度高。
有可能丢失水，也可能不丢。 |
|
|
j*****d
发帖数: 60 | 45 Yes, this is someone who knows chemistry more than me. |
|
K*********e
发帖数: 183 | 46 那两个脱水很显然, 我就不用说了. 我这打中文看不到字, 懒的多说.
还有两个问题请教: 1: "尤其是上边那个，脱质子后和双键共轭而稳定". 我怎么觉得
哪个电子在O上比在C上好呢? 难道我理解错了. 虽然说可以形成共轭双键, 但这对电子
并不能在共轭双键上移动, 所以这个
共轭意义不大, 如果我错了, 请纠正.
2. (I can't type Chinese anymore suddenly). LZ said the paper says that the
compound lost CO or CO2, that also means the 5-member ring actually is
opened under basic condition. Am I wrong?
Thanks a lot! |
|
f********e
发帖数: 2194 | 47 positive 不一定有强峰，羟基的碱性太弱 |
|
|
f********e
发帖数: 2194 | 49 说的很好，只是对最后一句持保留意见，上面的羟基脱了质子也不会和那个双键共轭，
除非那个双键发生重排到环内 |
|
f********e
发帖数: 2194 | 50 1.不知道你想问什么，共轭双键比稳定就够了。不稳定到稳定就是脱水的动力。
2.环肯定没有开。首先这个内酯就可以脱co or co2，但是羧酸就不能脱co；其次如果
环开了，准分子离子峰的分子量和闭环的是不一样的
the |
|
