To compensate for the imperfection of traditional bi-directional evolutionary structural optimization, material interpolation scheme and sensitivity filter functions are introduced. A suitable filter can overcome the ...To compensate for the imperfection of traditional bi-directional evolutionary structural optimization, material interpolation scheme and sensitivity filter functions are introduced. A suitable filter can overcome the checkerboard and mesh-dependency. And the historical information on accurate elemental sensitivity numbers are used to keep the objective function converging steadily. Apart from rational intervals of the relevant important parameters, the concept of distinguishing between active and non-active elements design is proposed, which can be widely used for improving the function and artistry of structures directly, especially for a one whose accurate size is not given. Furthermore, user-friendly software packages are developed to enhance its accessibility for practicing engineers and architects. And to reduce the time cost for large timeconsuming complex structure optimization, parallel computing is built-in in the MATLAB codes. The program is easy to use for engineers who may not be familiar with either FEA or structure optimization. And developers can make a deep research on the algorithm by changing the MATLAB codes. Several classical examples are given to show that the improved BESO method is superior for its handy and utility computer program software.展开更多
Triply catenated systems are highly intricate topologies that consist of two identical,mechanically interlocked coordination cage components with intriguingly complex architectures.A few triply interlocked catenanes h...Triply catenated systems are highly intricate topologies that consist of two identical,mechanically interlocked coordination cage components with intriguingly complex architectures.A few triply interlocked catenanes have been successfully synthesized to date,but how to controllably construct the aesthetic topologies and study their host-vip properties is still a tough challenge.Herein,taking advantage of rational strategies,we reported the efficient construction of a triply interlocked[2]catenane with the formula[(Cp*Rh)_(12)B_(6)L_(4)](OTf)_(12),wherein both the discrete metal-coordination cages were mutually interlocked through mechanical bonds.A series of characterization techniques were employed to confirm the formation and structure of the desired triply interlocked system:multinuclear NMR spectroscopy,ESI-MS,and single-crystal X-ray diffraction analysis.The solid-state structure of[(Cp*Rh)_(12)B_(6)L_(4)](OTf)_(12)unambiguously confirmed the existence of a triply interlocked catenane that consisted of two identical,mechanically interlocked hexanuclear metal-coordination cage components.Interestingly,in solution,the catenated topology can be transformed into a monomer induced by host-vip interactions and external stimuli like UV-visible light.Furthermore,we systematically studied its host-vip properties for potential applications in drug delivery systems.展开更多
基金supported by the National Natural Science Foundation of China(No.51078311)
文摘To compensate for the imperfection of traditional bi-directional evolutionary structural optimization, material interpolation scheme and sensitivity filter functions are introduced. A suitable filter can overcome the checkerboard and mesh-dependency. And the historical information on accurate elemental sensitivity numbers are used to keep the objective function converging steadily. Apart from rational intervals of the relevant important parameters, the concept of distinguishing between active and non-active elements design is proposed, which can be widely used for improving the function and artistry of structures directly, especially for a one whose accurate size is not given. Furthermore, user-friendly software packages are developed to enhance its accessibility for practicing engineers and architects. And to reduce the time cost for large timeconsuming complex structure optimization, parallel computing is built-in in the MATLAB codes. The program is easy to use for engineers who may not be familiar with either FEA or structure optimization. And developers can make a deep research on the algorithm by changing the MATLAB codes. Several classical examples are given to show that the improved BESO method is superior for its handy and utility computer program software.
文摘Triply catenated systems are highly intricate topologies that consist of two identical,mechanically interlocked coordination cage components with intriguingly complex architectures.A few triply interlocked catenanes have been successfully synthesized to date,but how to controllably construct the aesthetic topologies and study their host-vip properties is still a tough challenge.Herein,taking advantage of rational strategies,we reported the efficient construction of a triply interlocked[2]catenane with the formula[(Cp*Rh)_(12)B_(6)L_(4)](OTf)_(12),wherein both the discrete metal-coordination cages were mutually interlocked through mechanical bonds.A series of characterization techniques were employed to confirm the formation and structure of the desired triply interlocked system:multinuclear NMR spectroscopy,ESI-MS,and single-crystal X-ray diffraction analysis.The solid-state structure of[(Cp*Rh)_(12)B_(6)L_(4)](OTf)_(12)unambiguously confirmed the existence of a triply interlocked catenane that consisted of two identical,mechanically interlocked hexanuclear metal-coordination cage components.Interestingly,in solution,the catenated topology can be transformed into a monomer induced by host-vip interactions and external stimuli like UV-visible light.Furthermore,we systematically studied its host-vip properties for potential applications in drug delivery systems.
