对-ClCH 2 C 6 H 4 SiCl 3在丙酮水溶液中的水解缩合反应产生[ p -ClCH 2 C 6 H 4 SiO 3/2 ] 8(1),这是一种合成八官能多面体低聚倍半硅氧烷的合成前体[ p -XCH 2 C 6 H 4 SiO 1.5 ] 8,包括2(X = I),3(X = OH),4(X = ONO 2),5(X = OAc),6(X =对硝基苯甲酰基)和7(X =甲基对苯二甲酰基)。
作者:Jiahao Huang、Zebin Su、Mingjun Huang、Rongchun Zhang、Jian Wang、Xueyan Feng、Rui Zhang、Ruimeng Zhang、Wenpeng Shan、Xiao‐Yun Yan、Qing‐Yun Guo、Tong Liu、Yuchu Liu、Yunpeng Cui、Xiaopeng Li、An‐Chang Shi、Stephen Z. D. Cheng
DOI:10.1002/anie.201914889
日期:2020.10.12
molecules, self‐assembled supramolecularstructures of perylenebisimides (PBIs) are commonly limited to columnar or lamellar structures due to their distinct π‐conjugated scaffolds and unique rectangular shape of perylene cores. The discovery of PBIs with supramolecularstructuresbeyond layers and columns may expand the scope of PBI‐based materials. A series of unconventional spherical packing phases in
Silsesquioxane-bonded zirconocene complexes; soluble models for silica-tethered olefin polymerization catalysts
作者:John R. Severn、Robbert Duchateau、Rutger A. van Santen、Dianne D. Ellis、Anthony L. Spek、Glenn P. A. Yap
DOI:10.1039/b300698k
日期:——
Silsesquioxane tethered fluorene ligands [R7Si8O12X]-9-Flu(H)
(R =
c-C6H11, X =
–
(1); R =
c-C5H9, X = CH2
(2), (CH2)3
(3), C6H4CH2
(4)), (c-C5H9)7Si8O12CH2-9-Flu(9-EMe3)
(E = Si (5a), Sn (5b)) and zirconium dichlorides Cp″[(c-C5H9)7Si8O12CH2-9-Flu]ZrCl2
(6b, Cp″
= 1,3-C5H3(SiMe3)2), Cp*[(c-C5H9)7Si8O12-X-9-Flu]ZrCl2
(X = CH2
(6a), (CH2)3
(7), C6H4CH2
(8)) and [(c-C5H9)7Si8O12CH2-9-Flu]2ZrCl2
(9) have been applied as models for silica-tethered ancillary ligands and silica tethered-zirconocenes. Immobilization of zirconocenes containing a pendant anchorable functionality, Cp″[Me2(EtO)SiCH2Flu]ZrCl2
(10) and Cp[C5Me4SiMe2OEt]ZrCl2
(11) was considerably hampered by competitive Zr–Cl and Si–OEt bond splitting. When activated with MAO (methylalumoxane), 6–9 yield active ethylene polymerization systems.
Silsesquioxane 链接的氟烯配体 [R7Si8O12X]-9-Flu(H)
(R = c-C6H11, X = – (1); R = c-C5H9, X = CH2 (2), (CH2)3 (3), C6H4CH2 (4)),
(c-C5H9)7Si8O12CH2-9-Flu(9-EMe3)
(E = Si (5a), Sn (5b)) 和锆二氯化物 Cp″[(c-C5H9)7Si8O12CH2-9-Flu]ZrCl2
(6b, Cp″ = 1,3-C5H3(SiMe3)2), Cp*[(c-C5H9)7Si8O12-X-9-Flu]ZrCl2
(X = CH2 (6a), (CH2)3 (7), C6H4CH2 (8)) 以及 [(c-C5H9)7Si8O12CH2-9-Flu]2ZrCl2
(9) 已被应用作为硅连接的辅助配体和硅连接的锆烯模型。
含有悬挂可锚定功能的锆烯的固定化,Cp″[Me2(EtO)SiCH2Flu]ZrCl2 (10) 和 Cp[C5Me4SiMe2OEt]ZrCl2 (11) 受到竞争性 Zr–Cl 和 Si–OEt 键断裂的显著阻碍。当与 MAO(甲基铝氧烷)激活时,6–9 产生活性乙烯聚合系统。
What use for polysilsesquioxane lithium salts in lithium batteries?
Aryl-containing lithium perfluorosulfonates form unquestionably a family of salts having fairly good electrochemical performances, especially high cation transference numbers. Here, this family was extended to polysilsesquioxanes in which every silicon atom bears one lithium perfluorosulfonate group, via a sol–gel synthesis involving an original organotrialkoxysilane salt precursor. Despite their high
Unexpected Elasticity in Assemblies of Glassy Supra‐Nanoparticle Clusters
作者:Jia‐Fu Yin、Zhao Zheng、Junsheng Yang、Yuchu Liu、Linkun Cai、Qing‐Yun Guo、Mu Li、Xinpei Li、Tao Lin Sun、Geng Xin Liu、Caili Huang、Stephen Z. D. Cheng、Thomas P. Russell、Panchao Yin
DOI:10.1002/anie.202013361
日期:2021.2.23
remains unclear. Here, supra‐nanoparticleclusters (SNPCs) with precise structures are developed as model systems to elucidate the unexpected elastic behaviors. SNPCs are prepared by coordination‐driven assembly of polyhedral oligomeric silsesquioxane (POSS) with metal‐organic polyhedron (MOP). Due to the disparity in sizes, the POSS‐MOP assemblies, like their classic nanoparticles counterparts, ordering
Self‐assembly and secondary structures of linear polypeptides tethered to polyhedral oligomeric silsesquioxane nanoparticles through click chemistry
作者:Yung‐Chih Lin、Shiao‐Wei Kuo
DOI:10.1002/pola.24640
日期:2011.5.15
In this study, we used clickchemistry to synthesize a new macromolecular self‐assembling building blocks, linearpolypeptide‐b‐polyhedraloligomericsilsesquioxane (POSS) copolymers, from a mono‐azido–functionalized POSS (N3‐POSS) and several alkyne‐poly(γ‐benzyl‐L‐glutamate) (alkyne‐PBLG) systems. The incorporation of the POSS unit at the chain end of the PBLG moiety allowed intramolecular hydrogen