Homopolymerization of 4-vinyl pyridine（4-VP） and copolymerization of 4-VP with styrene（St） were performed by catalyst systems composed of calix[4]arene-neodymium complex 2,di-n-butylmagnesium and hexamethyl phosph...Homopolymerization of 4-vinyl pyridine（4-VP） and copolymerization of 4-VP with styrene（St） were performed by catalyst systems composed of calix[4]arene-neodymium complex 2,di-n-butylmagnesium and hexamethyl phosphoramide. The molecular weight of P（4-VP） was greatly affected by adding calix[4]arene-neodymium complex,and high molecular weight of P（4-VP） was got by using calix[4]arene-neodymium complex.The highest molecular weight of P（4-VP） was as high as 4.65×106 obtained by using a catalyst system with 2.0×10-4?mol/L of calix[4]arene-neodymium complex,while the molecular weight of P（4-VP） was only 5.62×105 without calix[4]arene-neodymium complex. In addition,4-VP-St copolymers with different 4-VP contents were obtained in good yield.When styrene was polymerized first for a time period,and then 4-VP was added,4-VP-St copolymers with 4.85?mol%～23.3?mol% of 4-VP units were obtained,but when 4-VP and styrene were added at the same time the resultant 4-VP-St copolymers had 44.0?mol%～66.3?mol% of 4-VP units.展开更多
将小分子金属配合物[Pt(C^N^N)Cl](HC^N^N=6-(4-苯基)-2,2′-联吡啶)连接到高分子P4VP(聚4-乙烯基吡啶)侧链上,制备了聚4-乙烯基吡啶铂(Ⅱ)配合物[(P4VP)Pt(C^N^N)]Cl。此高分子配合物旋涂膜对醇蒸气具有高度的识别响应能力:膜的荧光强...将小分子金属配合物[Pt(C^N^N)Cl](HC^N^N=6-(4-苯基)-2,2′-联吡啶)连接到高分子P4VP(聚4-乙烯基吡啶)侧链上,制备了聚4-乙烯基吡啶铂(Ⅱ)配合物[(P4VP)Pt(C^N^N)]Cl。此高分子配合物旋涂膜对醇蒸气具有高度的识别响应能力:膜的荧光强度在醇蒸气中迅速猝灭。而在氮气流中,荧光又能够重新开启。整个过程可逆、迅速。膜对不同醇蒸气的敏感能力差别顺序为:甲醇>乙醇>异丙醇。并且荧光强度变化和醇蒸气浓度在一定范围内,具有好的线性关系。此外膜对以上醇蒸气的监测LOD(limit of detection)分别是9.5、16.1和11 ppm。展开更多
文摘Homopolymerization of 4-vinyl pyridine（4-VP） and copolymerization of 4-VP with styrene（St） were performed by catalyst systems composed of calix[4]arene-neodymium complex 2,di-n-butylmagnesium and hexamethyl phosphoramide. The molecular weight of P（4-VP） was greatly affected by adding calix[4]arene-neodymium complex,and high molecular weight of P（4-VP） was got by using calix[4]arene-neodymium complex.The highest molecular weight of P（4-VP） was as high as 4.65×106 obtained by using a catalyst system with 2.0×10-4?mol/L of calix[4]arene-neodymium complex,while the molecular weight of P（4-VP） was only 5.62×105 without calix[4]arene-neodymium complex. In addition,4-VP-St copolymers with different 4-VP contents were obtained in good yield.When styrene was polymerized first for a time period,and then 4-VP was added,4-VP-St copolymers with 4.85?mol%～23.3?mol% of 4-VP units were obtained,but when 4-VP and styrene were added at the same time the resultant 4-VP-St copolymers had 44.0?mol%～66.3?mol% of 4-VP units.
基金supported by the National Natural Science Foundation of China(21773215,J1210060)the Innovative Research Grant for Undergraduate Students of National/Zhengzhou University(201710459008)~~
文摘将小分子金属配合物[Pt(C^N^N)Cl](HC^N^N=6-(4-苯基)-2,2′-联吡啶)连接到高分子P4VP(聚4-乙烯基吡啶)侧链上,制备了聚4-乙烯基吡啶铂(Ⅱ)配合物[(P4VP)Pt(C^N^N)]Cl。此高分子配合物旋涂膜对醇蒸气具有高度的识别响应能力:膜的荧光强度在醇蒸气中迅速猝灭。而在氮气流中,荧光又能够重新开启。整个过程可逆、迅速。膜对不同醇蒸气的敏感能力差别顺序为:甲醇>乙醇>异丙醇。并且荧光强度变化和醇蒸气浓度在一定范围内,具有好的线性关系。此外膜对以上醇蒸气的监测LOD(limit of detection)分别是9.5、16.1和11 ppm。
