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F- Catalytic Rearrangements of Silsesequioxanes (SQs) and Analogs: New Cage Sizes and Unusual Reactive Properties MPMeister

Richard M. Laine

生駒 : 奈良先端科学技術大学院大学, 2016.5

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Holdings:
  Volume Printing year Location Call Number Material ID Circulation class Status Waiting
1 MPMeister   Digital Library LA-M-R[Flash][Mobile] M013549   0
Contents Intro. : We have been exploring the use of tBu4NF as a means to transform either polymeric T resins or single functional group T8 cages into mixed functional T10 and T12 SQs as illustrated in the two following reactions.1-3 To this end, we have now developed simple, multigram routes to pure PhT8, PhT10­ and PhT12. The PhT8 system offers cubic symmetry whereas the PhT10 system offers five fold symmetry and is therefore a very unusual molecule. In contrast, the PhT12 compound has no symmetry. We have also been able to identify and isolate still larger cages as will be discussed. The various cage sizes allow us to explore the effects of symmetry and size on a wide variety of properties. For example, the PhT8 cage brominates almost exclusively in the ortho position. The PhT10 also brominates preferentially in the same position whereas the PhT12 is less selective. Modeling studies seem to explain the observed behavior. We have also used Heck catalytic cross coupling to functionalize the ortho-bromo derivatives of the cages and explored their photophysical properties.
Publication year : 2016
Form : 電子化映像資料(1時間2分43秒)
Series title :

光ナノサイエンス特別講義 ; 平成28年度

Note :

講演者所属: University of Michigan

講演日: 平成28年5月9日

講演場所: 物質創成科学研究科大講義室

Country of publication : Japan
Title language : English (eng)
Language of texts : English (eng)
Author information :

Richard M. Laine