手性Schiff碱及其类似物和配合物的研究进展

简要介绍了手性Schiff碱及其类似物和配合物在催化、医药、功能材料中的应用研究进展,为同类课题的进一步研究奠定了基础。     

Quantum multicast communication over the butterfly network

We propose a scheme where one can exploit auxiliary resources to achieve quantum multicast communication with network coding over the butterfly network.In this paper,we propose the quantum 2-pair multicast communication scheme,and extend it to k-pair multicast communication over the extended butterfly network.Firstly,an EPR pair is shared between each adjacent node on the butterfly network,and make use of local operation and classical communication to generate entangled relationship between non-adjacent nodes.Secondly,each sender adds auxiliary particles according to the multicast number k,in which the CNOT operations are applied to form the multi-particle entangled state.Finally,combined with network coding and free classical communication,quantum multicast communication based on quantum measurements is completed over the extended butterfly network.Not only the bottleneck problem is solved,but also quantum multicast communication can be completed in our scheme.At the same time,regardless of multicast number k,the maximum capacity of classical channel is 2 bits,and quantum channel is used only once.     

超临界二氧化碳协助制备功能性PVA/CNT/Pd多级复合纳米材料

聚乙烯醇(PVA)是分子主链含有—CH2—CH(OH)—基团的高聚物,通过聚醋酸乙烯酯水解得到的水溶性高分子树脂。本工作在超临界CO2的辅助下使用聚乙烯醇来修饰碳纳米管(CNTs),目的是增强CNTs在水中的分散性。进一步利用这种PVA修饰过的CNTs作为催化剂载体,负载金属钯的纳米晶体颗粒,通过调节超临界CO2的压力以及控制反应过程中的磁力搅拌条件,实现了对PVA/CNT/Pd复合材料中钯纳米晶体形貌的控制,为研究水介质Suzuki coupling反应(铃木偶合反应)寻求一条新的道路。