關鍵詞：ammonia ammonium chloride solution raman 

摘要：The solubility of ammonium chloride in aqueous ammonia decreases then increases with increasing ammonia concentrations.The molecular mechanism behind this trend is unclear.In this study,ATR-FTIR and Raman spectroscopic techniques were used to determine the effect of ammonium chloride on hydrogen bonding in aqueous ammonia and ultimately explain the observed solubility trend.Spectral analyses were conducted in the wavelength range of 2500-4000 cm^-1 .The results showed that the addition of ammonium chloride endorses the formation of N-H…N hydrogen bonds between ammonium ions and ammonia molecules when the concentration of ammonia is greater than 10% ammonia.However,for concentrations lower than 10%,ammonium ions mainly bond to water molecules,leading to hydrogen bonds of the N-H…O type that are generally less stable than N-H…N bonds.The spectral analyses are confirmed by MD simulations.The results presented herein are useful in the development of novel techniques for the separation of ammonium potassium chloride.

鹽湖研究雜志要求:

{1}來稿請注明通訊地址、單位、郵編、電話等，本刊一律不退稿，請自留底稿。

{2}文稿應具有先進性、科學性、邏輯性和實用性。要求資料完整、可靠，觀點明確，文字精煉，層次清楚，數據準確并經過統計學處理。

{3}題名。題名一般不宜超過20個漢字，應緊扣文章主題，用語用詞嚴謹規范且利于網絡檢索。不得使用非公知公用、同行不熟悉的外來語、縮寫詞、符號和代號。

{4}參考文獻：參考文獻采用順序編碼制，參考文獻的序號以方括號加注于被注文字的右上角，內容按序號順序排列于文后，序號用方括號標注，按正文中出現的次序標引，文后沒有與文中引用相對應的參考文獻一律刪除。

{5}來稿請附中英文摘要（中文200—300 字左右）和關鍵詞（3—5 個）。

注：因版權方要求，不能公開全文，如需全文，請咨詢雜志社