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[求助]
MS的使用
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大神們我看到一篇文獻中計算爆炸反應的爆能,反應為: CuC12H12N26O6—— CuO+5H2O+2/3NH3+38/3N2+12C 文獻中給出的條件如下: The extended polymeric backbone structures of NHN, NHP,and CHP prompted the use of all calculations in periodic supercells representing the smallest repeating unit of the explosive. This also accounts for the contribution of the cohesive energy (i.e., heat of sublimation) of the crystalline solid. The DFT code DMol3, was employed, with the electronic wave functions expanded in a double-numeric polarized double-numeric polarized basis set, while the exchange and correlation effects were incorporated through the gradient-corrected PBE functional. For a periodic calculation, an accurate Brillouin-zone sampling of the reciprocal lattice was also necessary. This was ensured by summation over a finite set of K-points chosen according to the Monkhorst−Pack scheme with a grid spacing of 0.05Å−1 我用MS7.0的dmol3模塊設置了 PBE泛函 DNP基組 和0.05,反應物還沒優(yōu)化完 ,但是我有幾個問題不太明白: 1. CuO我是直接調用的MS里面的,每個盒子里有4個CuO。我想用優(yōu)化出來的能量除以4得到單個的能量,但是計算出來后與文獻的不一樣,差距很大 2.計算出來的水和氮氣也與文獻給出的有點差距但是比較小,在小數(shù)點后第三位 3.我想問一下爆炸反應的產(chǎn)物應該怎么寫呢,我看文獻中提到看一個cheetah,但是沒有看不太明白 由于本人小菜鳥一枚希望知道的大神們指導一下,幫忙看一下問題出在哪,是不是有的選項沒設置, |
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