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銘刻至尊木蟲 (著名寫手)
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[求助]
MOF單晶結(jié)構(gòu)求助 已有1人參與
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最近做出一個MOF的單晶,想盡快投出,但是發(fā)現(xiàn)審稿人對自己的晶體結(jié)構(gòu)分析上有些意見。由于自己也是剛剛進(jìn)入這個領(lǐng)域,所以還有好多不懂的地方,想請各位牛人幫忙分析一下這個晶體的結(jié)構(gòu)。 以下為審稿人的提出的意見: As an example: It is stated that "...each asymmetric unit contains one crystallographic independent zinc atom and two unique 1,3-diacetoxy-imidazole molecules." which is false: only one cation on a symmetry element (amounting for half an independent unit) and one unique anion fill the asymmetric unit, with z=8. The authors have decided (and they are fully entitled to do so) to describe the elemental structural unit as twice as much, with z=4, but then the unit IS NOT FULLY independent. The description as a 3D framework is also wrong: this is not a 3D but a 2D covalent framework parallel to (001), linked by extremely weak C-H...O and pi...pi contacts (See attached files to find some RELEVANT non-covalent interactions. The H-bond mentioned as responsible of the link between 2D structures is nonsense (H..O too long with a rather small angle). The real link (even if weak) is the one involving H3. 金幣不多,如果幫忙解析的真的很認(rèn)真,很愿意再次追加給大家,再次感謝大家!! |
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至尊木蟲 (著名寫手)
木蟲 (正式寫手)

至尊木蟲 (著名寫手)
木蟲之王 (文學(xué)泰斗)
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