An Expanded 2D Fused Aromatic Network with 90‐Ring Hexagons

Riaño, Alberto; Strutyński, Karol; Lui, Meng; Stoppiello, Craig T.; Lerma‐Berlanga, Belén; Saeki, Akinori; Martí‐Gastaldo, Carlos; Khlobystov, Andrei N.; Valenti, G.; Paolucci, Francesco; Melle‐Franco, Manuel; Mateo‐Alonso, Aurelio

doi:10.1002/anie.202113657

Cited by 15 publications

(9 citation statements)

References 66 publications

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“…49 During the preparation of the manuscript, a novel COF with a very large pore was reported. 50 We show in SI Fig. 1 the corresponding HB that is resolved at 122.6 T, which is even lower than our proposed Starphene-COF.…”

Section: Towards a Measurable Hb In 2d Cofscontrasting

confidence: 54%

Hierarchies of Hofstadter butterflies in 2D covalent-organic frameworks

Bodesheim¹,

Biele²,

Cuniberti³

2022

Preprint

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The Hofstadter butterfly is one of the first and most fascinating examples of the fractal and selfsimilar quantum nature of free electrons in a lattice pierced by a perpendicular magnetic field. However, the direct experimental verification of this effect on single-layer materials is still missing as very strong and inaccessible magnetic fields are necessary. For this reason, its indirect experimental verification has only been realized in artificial periodic 2D systems, like moiré lattices. The only recently synthesized 2D covalent-organic frameworks might circumvent this limitation: Due to their large pore structures, magnetic fields needed to detect most features of the Hofstadter butterfly are indeed accessible with today technology. This work opens the door to make this exotic and theoretical issue from the 70s measurable and might solve the quest for the experimental verification of the Hofstadter butterfly in single-layer materials. Moreover, the intrinsic hierarchy of different pore sizes in 2D covalent-organic framework adds additional complexity and beauty to the original butterflies and leads to a direct accessible playground for new physical observations.

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Section: Towards a Measurable Hb In 2d Cofscontrasting

confidence: 54%

Hierarchies of Hofstadter butterflies in 2D covalent-organic frameworks

Bodesheim¹,

Biele²,

Cuniberti³

2022

Preprint

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“…The residue was chromatographed on silica gel (petroleum ether/ethyl acetate = 2:1) and dried under vacuum to afford a dark green solid, which is stable in the solid state. Their structures were confirmed by 1 H NMR, 13 C NMR, and MS, as shown in Figures S1−8 and S21−22 in the Supporting Information. Scheme 2 shows the synthetic route of novel V-shaped azaacenes.…”

Section: ■ Introductionmentioning

confidence: 78%

“…1 H NMR (600 MHz, chloroform-d): δ 6.96 (s, 2H), 6.88 (s, 4H), 3.85 (s, 12H), 2.66 (q, J = 7.4 Hz, 4H), 1.50 (t, J = 7.4 Hz, 6H). 13 Compound 14. Compound 13 (1.00 g, 2.63 mmol) was dissolved in DCM (20 mL), and the resulting solution was cooled to below 0 °C and kept at this temperature under a N 2 atmosphere.…”

Section: ■ Conclusionmentioning

confidence: 99%

Design and Synthesis of a Polyketone Building Block with Vinyl Groups─9,10-Diethyl-9,10-ethenoanthracene-2,3,6,7(9H,10H)-tetraone─and a Preliminary Photoelectrical Property Study of Its Azaacene Derivatives

Chen,

Zhang,

Liu

et al. 2023

ACS Omega

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Polyketone compounds are powerful building blocks to synthesize various organic functional materials. Despite that a great many number of planar and non-planar polyketone building blocks have been developed, one issue is that generally there are only ketone functional groups on the molecular skeleton, which will constrain their transformation and further limit the development of functional materials. In this work, we report the design and synthesis of a building block 9,10-diethyl-9,10-ethenoanthracene-2,3,6,7(9H,10H)-tetraone with additional vinyl functional groups. In addition, its azaacene derivatives were also synthesized, and their preliminary physicochemical properties were studied.

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“…67 Moreover, the 2D monolayers may adopt different stacking modes in space, e.g. , AA, 5 AB, 5,68,69 and ABC, 70–74 further enriching the structural diversity of 2D COFs. Conversely, less than 100 different 3D COFs have been reported since the first report in 2007.…”

Section: Introductionmentioning

confidence: 99%