Water-stable hydrazone-linked porous organic cages

Yang, Miao; Qiu, Fenglei; El-Sayed, El-Sayed M; Wang, Wenjing; Du, Shunfu; Su, Kongzhao; Yuan, Daqiang

doi:10.1039/d1sc04531h

Cited by 31 publications

(38 citation statements)

References 92 publications

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“…Figure 2h,i clearly show the absorption peaks in POC, corresponding to OH stretching (3337 cm −1 ), NH bending (1518 cm −1 ), and CO stretching (1676 cm −1 ). [ 42,46 ] When POC was deposited on SnO 2 film, these three peaks were shifted down to 3326, 1499, and 1661 cm −1 , respectively. It is reasonable to speculate that the above downshifts are caused by the interaction between SnO 2 and the specific group of POC.…”

Section: Resultsmentioning

confidence: 99%

Porous Organic Cage Induced Spontaneous Restructuring of Buried Interface Toward High‐Performance Perovskite Photovoltaic

Gao

Luo

Wang

et al. 2023

Adv Funct Materials

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In perovskite solar cells (PSCs), the buried interface containing high concentrations of defects is critical for efficient charge extraction toward high-performance device. Herein, porous organic cage (POC) is introduced between tin dioxide and perovskite to spontaneously reconstitute the buried interface. Through the chemical linkage formed by polydentate chelation of POC with SnO 2 and perovskite, the buried interface achieves greatly reduced defect density and enhanced carrier extraction. More importantly, it is found that iodide ions in aged devices to migrate down to the electron transport layer and even invade the ITO electrode, changing the work function of ITO. This detrimental effect can be well resolved by POC since the host-guest interaction of POC can effectively suppress the iodide ions trying to migrate downward. As a result, the PSC fabricated by POC-restructured strategy yields a superior PCE of 24.13%. Moreover, the unencapsulated PSCs exhibit conspicuous improved long-term stability and retain 93% of its initial efficiency after 5000 h in ambient condition.

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Section: Resultsmentioning

confidence: 99%

Porous Organic Cage Induced Spontaneous Restructuring of Buried Interface Toward High‐Performance Perovskite Photovoltaic

Gao

Luo

Wang

et al. 2023

Adv Funct Materials

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“…123 Recently, some studies revealed the possible application of POCs for trapping the pollutants in sewage. Yang et al 122 used N,N-dimethylformamide (DMF) as a solvent and introduced different dihydrazide linkers onto the concave-shaped tetraformyl-functionalized C4RACHO scaffold, and the seven obtained types of calix [4]-resorcinarene-based POCs (HPOC-101, 102, 103, 104, 201, 301, and 401) all exhibited an I 3 À adsorption capability in water. Notably, as shown in Fig.…”

Section: Water Desalination and Sewage Purificationmentioning

confidence: 99%

“…(b) Time-dependent adsorption of aqueous I 3 À by hydrazone-linked POCs; inset: the recyclability of HPOC-101 for I 3 À removal. (c) Percentage removal efficiency of different water pollutants (0.1 mM) by HPOC-101 (0.5 mg mL À1) 122.…”

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confidence: 99%

Recent advances in the applications of porous organic cages

Zhang

Liu

2022

Chem. Commun.

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“…This intrinsic drawback could be overcome by using an α-substituted imine, namely acylhydrazone [ 55 , 56 , 57 , 58 , 59 ]. This more robust dynamic bond has been used in the self-assembly of rings [ 60 , 61 , 62 , 63 , 64 , 65 ], cages [ 66 , 67 , 68 , 69 , 70 ], catenanes [ 37 , 71 , 72 ] as well as knots [ 73 ]. We thus envision that it might be possible to obtain bowl via acylhydrazone condensation.…”

Section: Introductionmentioning

confidence: 99%

Self-Assembly of a Purely Organic Bowl in Water via Acylhydrazone Formation

Jiao

2023

Molecules

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A bowl-shaped molecule can be self-assembled by condensing a triscationic hexaaldehyde compound and three equiv. of a dihydrazide linkers in pure water. The molecular bowl is thus composed of a triscationic π-electron deficient platform, as well as a hexagonal rim that contains six acylhydrazone functions. When the counteranions are chloride, the solid-state structure reveals that this molecular bowl undergoes dimerization via N–H···Cl hydrogen bonds, forming a cage-like dimer with a huge inner cavity. This molecular bowl can employ its cavity to accommodate a hydrophobic guest, namely 1-adamantanecarboxylic acid in aqueous media.

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Water-stable hydrazone-linked porous organic cages

Abstract: Although porous organic cages (POCs), particularly imine-linked (C=N) ones, have advanced significantly over the last decades, the reversible nature of imine linkages makes them prone to hydrolysis and structure collapse,...

Cited by 31 publications

References 92 publications

Porous Organic Cage Induced Spontaneous Restructuring of Buried Interface Toward High‐Performance Perovskite Photovoltaic

Porous Organic Cage Induced Spontaneous Restructuring of Buried Interface Toward High‐Performance Perovskite Photovoltaic

Recent advances in the applications of porous organic cages

Self-Assembly of a Purely Organic Bowl in Water via Acylhydrazone Formation

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