e-journal

Reticular Synthesis of Covalent Organic Borosilicate Frameworks

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Linking molecular building blocks into extended structures by strong covalent bonds (reticular chemistry) is now commonly practiced in the synthesis of metal-organic frameworks wherein transition metal-oxide bonds (e.g., Zn-O) join organic units to make highly robust, porous structures. Recently, we showed that
this chemistry can be extended to linking organic units by covalent bonds of small, light atoms (C-C, C-B, and B-O) to give a new class of solids termed covalent organic frameworks (COFs) whose members have the least dense crystals known to date. Overcoming the “crystallization problem” has been the key fundamental advance
since it provides for definitive characterization and specific control over the topology and functionality of the resulting structure. In this report, we further demonstrate the generality of this approach by linking organic units with the strong covalent bonds found in Pyrex (borosilicate glass, B-O and Si-O) to give a porous covalent organic borosilicate framework designated as COF-202.4 Our strategy for designing COF-202 borrows from the chemistry of molecular borosilicate clusters (Figure 1A through C) where it is known that the condensation of tert-butylsilane triol5 A with monotopic boronic acid B forms a high symmetry borosilicate cage C.6 We used the same condensation reaction with a divergent organic tetraboronic acid unit to articulate the borosilicate cage in a covalently linked organic framework.

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Informasi Detail

Judul Seri

J. AM. CHEM. SOC.

No. Panggil

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Penerbit

: American Chemical Society., 2008

Deskripsi Fisik

J. AM. CHEM. SOC. 2008, 130, 11872–11873

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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