摘要
利用2,6-双(2-苯并咪唑)吡啶(bbp)在氯甲基化交联聚苯乙烯(CPS)微球上进行烷基化反应,形成改性微球CPS-bbp,然后与Cu^(2+)盐配位,制得固体配合物CPS-Cu(Ⅱ)-bbp,分别采用核磁、红外、紫外-可见吸收光谱、扫描电子显微镜(SEM)/X线能谱(EDS)、热重分析对配合物的结构与形貌进行表征和观察.最后,将配合物作为催化剂,分别研究其在氧化苯甲醇、苯乙烯和环己烯氧化反应中的催化性能.结果表明,在以叔丁基过氧化氢为氧化剂,CPS-Cu(Ⅱ)-bbp为催化剂条件下,苯甲醇氧化产物只有苯甲醛,其转化率可达93.7%;苯乙烯的主要氧化产物为氧化苯乙烯,其转化率为89.1%,产物选择性为60.7%;氧化环己烯的主要氧化产物为α-环己烯酮,转化率为67.9%,选择性达96.7%.
Modified microspheres CPS-bbp were prepared by alkylation from 2,6-bis（2-benzimidazolyl） pyridine （ bbp ） and chloromethylated crosslinked polystyrene （ CPS ） microspheres. CPS-bbp chelating with Cu2＋ salt resulted in solid-phase complex CPS-Cu（ II）-bbp. The structure and morphology of the complex CPS-Cu（ II）-bbp were fully characterized by 1 H NMR, IR, UV-vis, SEM/EDS and TGA-DTA. As a catalyst, the catalytic properties of the complex CPS-Cu （ II ）-bbp were investigated in the catalytic oxidation of benzyl alcohol,styrene as well as cyclohexene. It was found that,when TBHP （ tert-butyl-hydrogen peroxide） used as oxygen source and CPS-Cu（II）-bbp as catalyst,the conversion rate of benzyl alcohol was 93. 7% and benzyl aldehyde was the sole product. As for styrene, the major product was epoxystyrene, the conversion rate was 89. 1% and the selectivity was 60.7%. As for cyclohexene, the major product was α-cyclohexenone, the conversion rate was 67 . 9% and the selectivity was up to 96 . 7%.
出处
《湖北大学学报（自然科学版）》
CAS
2016年第4期355-360,共6页
Journal of Hubei University：Natural Science
基金
湖北省自然科学基金(2011CDB068)资助
