In this review, a recent development of cationic ?-diimine palladium(II) complexes for ethylene polymerization and copolymerization with polar functionalized comonomers was briefly described. First, the polymerization...In this review, a recent development of cationic ?-diimine palladium(II) complexes for ethylene polymerization and copolymerization with polar functionalized comonomers was briefly described. First, the polymerization mechanism for this type of catalysts was discussed. Next, recent advances in ligand design were provided with special focus on the influence of ligand structures on the catalytic polymerization properties. Last, the ethylene homopolymerization and copolymerization with various polar comonomers, especially acrylate and vinyl ethers were summarized.展开更多
Balanced carrier transport is observed in acceptor-acceptor （A-A＇） type polymer for ambipolar organic thin-film transistors （OTFTs）. It is found that the incorporation of two electron-accepting moieties （BTz and...Balanced carrier transport is observed in acceptor-acceptor （A-A＇） type polymer for ambipolar organic thin-film transistors （OTFTs）. It is found that the incorporation of two electron-accepting moieties （BTz and IIG） into a polymer main chain to form A-A＇ polymer PIIG-BTz could lower highest occupied molecular orbital （HOMO） and lowest unoccupied molecular orbital （LUMO） levels and facilitate good molecular stacking of the polymer. Ambipolar transistor behaviour for PIIG-BTz, with the balanced hole and electron mobilities of 0.030 and 0.022 cm2 V 1 s-i was observed in OTFT devices, respectively. The study in this work reveals that the utilization of acceptor-acceptor （A-A＇） structure in polymer main chain can be a feasible strategy to develop ambipolar polymer semiconductors.展开更多
基金supported by the National Natural Science Foundation of China(21374108,21304054)the Promotive Research Fund for the Young and Middle-aged Scientists of Shandong Province(BS2012CL018)+2 种基金the Foundation of Qufu Normal University(XJ201212)the Fundamental Research Funds for the Central Universities(WK3450000001)the State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University(LK1424)
文摘In this review, a recent development of cationic ?-diimine palladium(II) complexes for ethylene polymerization and copolymerization with polar functionalized comonomers was briefly described. First, the polymerization mechanism for this type of catalysts was discussed. Next, recent advances in ligand design were provided with special focus on the influence of ligand structures on the catalytic polymerization properties. Last, the ethylene homopolymerization and copolymerization with various polar comonomers, especially acrylate and vinyl ethers were summarized.
基金supported by the National Natural Science Foundation of China (51173055, 21504026, 51572094)the National Basic Research Program of China (2013CBA01600)the China Postdoctoral Science Foundation (2013M542009)
文摘Balanced carrier transport is observed in acceptor-acceptor （A-A＇） type polymer for ambipolar organic thin-film transistors （OTFTs）. It is found that the incorporation of two electron-accepting moieties （BTz and IIG） into a polymer main chain to form A-A＇ polymer PIIG-BTz could lower highest occupied molecular orbital （HOMO） and lowest unoccupied molecular orbital （LUMO） levels and facilitate good molecular stacking of the polymer. Ambipolar transistor behaviour for PIIG-BTz, with the balanced hole and electron mobilities of 0.030 and 0.022 cm2 V 1 s-i was observed in OTFT devices, respectively. The study in this work reveals that the utilization of acceptor-acceptor （A-A＇） structure in polymer main chain can be a feasible strategy to develop ambipolar polymer semiconductors.
