摘要
着重考察了不同的阴离子对于1-丁基-3-甲基咪唑类离子液体分子内氢键的影响。通过核磁共振技术(NMR)考察了一系列咪唑离子液体中H质子化学位移的区别,以及在不同的氘代溶剂中咪唑环上H-D交换的难易程度;同时通过红外光谱(FT-IR)研究了离子液体咪唑环上C—H振动峰的相对位移;最后利用离子液体与染料作用力的不同,以紫外光谱(UV-vis)最大吸收波长的相对位移探测离子液体内阴阳离子间的氢键作用,从而得到离子液体中阴离子对分子内氢键作用强度的影响规律,给出了离子液体分子内氢键的强弱序列。
The hydrogen-bonding interaction in a series of 1-butyl-3-methylimidazolium cations with different anions has been investigated.In this work,NMR was used to investigate the changes in H2 chemical shifts and H-D exchange rates of imidazolium cations in different deuterated sols.FT-IR was used to realize the changes of C—H vibration bands due to different interactions between cations and anions in ionic liquids.UV-vis was also used to determine the strength of hydrogen-bonding interaction in ionic liquids.Thereby,the influence of 1-butyl-3-methylimidazolium anions on the strength of hydrogen-bonging in different ionic liquids and the sequence of intramolecular hydrogen-bonding were obtained.
出处
《中国科技论文》
CAS
北大核心
2012年第9期707-711,共5页
China Sciencepaper
基金
国家自然科学基金资助项目(21073058)
高等学校博士学科点专项科研基金资助项目(20100074110014)
中央高校基本科研业务费资助项目
