聚合物的分子量采用聚苯乙烯标准通过凝胶渗透色谱法(GPC)测定。重均分子量,M⏫,约44,500~207,500,数均分子量M⏫,约35,200~133,200,多分散性指数(M⏫/M⏫)在1.26~1.55,落在通常的缩合聚合物的范围内。如表(2)中所示,给出的聚合物具有高的分子量和窄的分子量分布。但应注意的是,凝胶渗透...
用bruker 500M核磁作H-N HMBC谱。选择标准试验HMBCGP_N15,新建试验后,只是修改了谱宽和扫描次数,...
Gerwert, K. Molecular reaction mechanisms of proteins monitored by time-resolved FTIR-spectroscopy.Biol Chem380, 931–935 (1999). ArticleCASGoogle Scholar Becker, E.D. Hydrogen bonding. inEncyclopedia of Nuclear Magnetic Resonance, Vol.4(eds. Grant, D.M. & Harris, R.K.) 2409–2415 (John ...
The position of C-1 could be proven via a series of mutually coupled resonances H-1/H2-2/H-3, H-5/H-6/H-7, H-9/H-11/H-12 and H-15 and H-16 in the COSY spectrum, respectively, along with the HMBC correlation from H-3 to C-1″; C-15 was also proven by combining the...
D4D3D2D1D0H2H1H0D1D0H3H2H1H05122550Example 1:2, Single-Cycle TLPsD5D4D3D2D1H3H2H1H05122550Example 2: 1, 6 Dword TLPD0D3D2D1H3H2H1H05122550Example 3:1, 4 Dword TLPD0SOP = 2’b11EOP = 2’b11Empty = 6’h02Valid = 2’b11SOP = 2’b01EOP = 2’b10Empty = 6’h30Valid =...
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Cannot RetimeForwards Dueto Short PathLong Path (LP)Short Path (SP)LegendCannot RetimeBackwards Dueto Short Path eJzUvVmPncmRJfhegP5DzEMBUs2Q9H3RPKVYWTUqhJSCtpGm0EhQZKSSXVyyuUid8+vHzewcc79x I1LqaQxQ04VOkcbvmu/mthwz/8f/5Ve/efLFq/d/unuSn4abH/3DP/7j8w93Lz69//DTGyXf/PzN m88fP30Q...
13C and 15N NMR chemical shift assignments based on z -gradient selected 1H,X (X=13C and 15N) HMQC and HMBC experiments are reported for N -1-(2-azidoethyl... E Kolehmainen,K Lappalainen,Šaman, David,... - 《Magnetic Resonance in Chemistry》 被引量: 1发表: 2015年 加载更多来源...
EADHMBC如图,正方形ABCD中,AC与BD交于点O,M是对角线AC上的一个动点,直线BM与直线AD交于点E,过A作AH垂直BE于点H,直线AH与直线BD交于点N,连接EN、OH,则下列结论:①BM=AN;②OH平分∠MHN;③当EN/\!/OM时,BN^{2}=DN\boldsymbol{⋅}DB;④当M为AO中点时,\dfrac{AH}{BM}=\dfrac{2}{5},正确结...
The 1 H and 13 C NMR resonances of 16 purine glucosides were assigned by a combination of one- and two-dimensional NMR experiments, including gs-COSY, gs-HSQC, and gs-HMBC, in order to characterize the effect of substituent and the position of glucose unit on the NMR chemical shifts. I...