CAJ | 학술논문

利用红外光谱、核磁共振和热重分析表征了1,8-二氮杂环[5,4,0]十一烯-7(DBU)和CO2分别与C3-醇，即正丙醇、异丙醇、1,2-丙二醇、1,3-丙二醇和甘油，反应生成的离子化合物的组成和结构，研究了伯羟基和仲羟基与DBU 和 CO2反应的活性，以及空间位阻对羟基反应活性和生成的离子化合物的热稳定性的影响。结果表明， DBU+C3-醇+CO2体系中伯羟基比仲羟基具有更高的反应活性，反应产物更稳定。由于空间位阻和电子效应等影响，二元醇中第2个羟基的反应活性远低于第1个羟基。在DBU+甘油+CO2体系中由于空间位阻和电子效应的影响，当DBU和甘油的摩尔比为3：1时，其中1位羟基的转化率可达100%，3位羟基的转化率约为34%，而2位的仲羟基反应很少。
이용홍외광보、핵자공진화열중분석표정료1,8-이담잡배[5,4,0]십일희-7(DBU)화CO2분별여C3-순，즉정병순、이병순、1,2-병이순、1,3-병이순화감유，반응생성적리자화합물적조성화결구，연구료백간기화중간기여DBU 화 CO2반응적활성，이급공간위조대간기반응활성화생성적리자화합물적열은정성적영향。결과표명， DBU+C3-순+CO2체계중백간기비중간기구유경고적반응활성，반응산물경은정。유우공간위조화전자효응등영향，이원순중제2개간기적반응활성원저우제1개간기。재DBU+감유+CO2체계중유우공간위조화전자효응적영향，당DBU화감유적마이비위3：1시，기중1위간기적전화솔가체100%，3위간기적전화솔약위34%，이2위적중간기반응흔소。
The DBU/C3-alcohol/CO2ionic compounds were synthesized by reacting the C3-alcohols, namely 1-propanol, 2-propanol, 1,2-propanediol, 1,3-propanediol and glycerol with CO2 and 1,8-diazabicycloundec-7-ene (DBU), respectively. The composition and structure of them were characterized by FT-IR, NMR and TG. The reactivity of the hydroxyls at different position in C3-alcohol and the steric effect in polyols were studied. The results showed that the reactivity of the primary hydroxyl of 1-propanol was higher than the secondary hydroxyl of 2-propanol in the reaction of DBU+C3-alcohol+CO2. For the diols, the steric hindrance and the electronic effect significantly lowered the activity of the second hydroxyl, and such interaction in 1,2-diols was stronger than that of 1,3-diols. For the DBU+glycerol+CO2 system,the main ionic compound was formed by reacting with only one of the primary hydroxyl in glycerol. The second most abundant product was formed by reacting both of the primary hydroxyls in glycerol. However, the complete conversion of all three hydroxyls seemed not possible due to the high steric hindrance effect.