Construction of Covalent Organic Frameworks Bearing Three Different Kinds of Pores through the Heterostructural Mixed Linker Strategy

Abstract

It is very important to create novel topologies and improve structural complexity for covalent organic frameworks (COFs) that might lead to unprecedented properties and applications. Despite the progress achieved over the past decade, the structural diversity and complexity of COFs are quite limited. In this Communication, we report the construction of COFs bearing three different kinds of pores through the heterostructural mixed linker strategy involving the condensation of a D2h-symmetric tetraamine and two C2-symmetric dialdehydes of different lengths. The complicated structures of the triple-pore COFs have been confirmed by powder X-ray diffraction and pore size distribution analyses.

Precision Construction of 2D Heteropore Covalent Organic Frameworks by a Multiple‐Linking‐Site Strategy

“…The validity of this approach has recentlyb een demonstrated by the successful construction of severalh eteropore COFs by combination of linearl inkersw ith D 2h -symmetric tetraphenylethenebased monomers (Scheme 1b) [34][35][36][37] or C 2v -symmetric building blocks (Scheme 1c). The validity of this approach has recentlyb een demonstrated by the successful construction of severalh eteropore COFs by combination of linearl inkersw ith D 2h -symmetric tetraphenylethenebased monomers (Scheme 1b) [34][35][36][37] or C 2v -symmetric building blocks (Scheme 1c).…”

“…The validity of this approach has recentlyb een demonstrated by the successful construction of severalh eteropore COFs by combination of linearl inkersw ith D 2h -symmetric tetraphenylethenebased monomers (Scheme 1b) [34][35][36][37] or C 2v -symmetric building blocks (Scheme 1c). The previous studies have indeed revealed that, although the combination of tetraphenylethene-based D 2h -symmetrical monomers and linear linkers resulted in dual-pore COFs, [34][35][36][37] the formation of single-pore COFs was also observed when building blocks having the same symmetry but different structures were used. However,e ach of these two strategies theoretically can lead to two types of COFs with different topological structures.…”

Kovalente organische Netzwerke und Käfigverbindungen: Design und Anwendungen von polymeren und diskreten organischen Gerüsten

“…Der Einbau von symmetriereduzierten Eckbausteinen [164,165] oder Vorstufen mit unterschiedlichen Bisswinkeln [166][167][168] kann zu geordneten Stukturen mit zwei oder drei unterschiedlichen Poren führen. Auch soziale Selbstsortierung von Mehr-Komponenten-Mischungen führte zu 2D-COFs mit einem dreifachen Porensystem [167] oder anisotropen Strukturen mit ungewçhnlichen Poren von niedriger Symmetrie. [169] Mehrere unterschiedliche Porenkanäle konnten auch durch den Einbau von formgetreuen Makrozyklen als Bausteine erreicht werden, [170,171] wobei die erste Pore intrinsisch durch den Makrozyklus und die zweite durch die Polymerisation erzeugt wird.…”

“…[163] Derartige 2D-COFs kçnnten beispiellose Eigenschaften fürG asspeicherung und Gasteinschluss aufweisen. Der Einbau von symmetriereduzierten Eckbausteinen [164,165] oder Vorstufen mit unterschiedlichen Bisswinkeln [166][167][168] kann zu geordneten Stukturen mit zwei oder drei unterschiedlichen Poren führen. Die Einführung von sterisch anspruchsvollen Substitutenten kann jedoch zu einem Vermeiden von kleineren Poren und damit zu einem Wechsel der COF-Topologie führen.…”

Luminescent Porous Polymers Based on Aggregation‐Induced Mechanism: Design, Synthesis and Functions

“…These results indicated multiple‐component strategy is also useful for the preparation of luminescent materials. COFs with tetraphenylethene (TPE) building blocks have been recently developed to show high crystallinity and porosity; however, their luminescence properties have not been demonstrated …”