Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Enhancing structural control in covalent organic frameworks through steric interaction-driven linker design
Δημιουργός/Συγγραφέας:	Winter, Alena Hamdi, Farzad Eichhöfer, Andreas Saalwächter, Kay [EL] Καστρίτης, Παναγιώτης[EN] Kastritis, Panagiotis Haase, Frederik
Ημερομηνία:	2024
Γλώσσα:	Αγγλικά
ISSN:	2041-6520 2041-6539
DOI:	10.1039/D4SC03461A
Περίληψη:	Covalent Organic Frameworks (COFs) exhibiting kagome (kgm) structures are promising crystalline porous materials with two distinct pores. However, there are no reliable synthetic methods to exclusively target the kgm over the polymorphic square-lattice (sql) structure. To address this, we introduce a linker design strategy featuring bulky functional groups, which through steric interactions can hinder the sql net formation, thereby leading to a kgm structure. By rigid attachment of the methyl benzoate groups to a tetradentate COF linker, steric interactions with neighbouring linkers depending on the pore size become possible. The steric interaction was tuned by varying the complementary bidentate linear linker lengths, where the shorter phenylenediamine linker leads to steric hindrance and the formation of the kgm lattice, while with the longer benzidine linker, steric interaction is reduced leading to the sql lattice. Thus, control over the net can be exerted through steric interaction strengths. Additionally, structural analysis revealed the formation of the kgm COF with an unusual ABC stacking, leading to pearl string type pores instead of two distinct pore sizes. This COF system shows that steric interaction-driven design enhances control over COF structures, expanding the design toolbox, but also provides valuable insights into network formation and polymorphism.
Τίτλος πηγής δημοσίευσης:	Chemical Science
Τόμος/Κεφάλαιο:	15
Τεύχος:	35
Θεματική Κατηγορία:	[EL] Οργανική χημεία[EN] Organic chemistry [EL] Κρυσταλλογραφία[EN] Crystallography
Λέξεις-Κλειδιά:	Covalent Organic Frameworks (COFs) polymorphism steric interactions linker design methyl benzoate groups
EU Grant:	RTG 2670 hot4cryo BMBF, ZIK program
EU Grant identifier:	436494874 101086665 03Z22HI2 03Z22HN23 03COV04 EFRE: ZS/2016/04/78115 391498659, RTG 2467
Κάτοχος πνευματικών δικαιωμάτων:	© 2024 The Author(s). Published by the Royal Society of Chemistry
Όροι και προϋποθέσεις δικαιωμάτων:	This article is Open Access
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1039/D4SC03461A
Εμφανίζεται στις συλλογές:	Ινστιτούτο Χημικής Βιολογίας - Επιστημονικό έργο