Two-dimensional covalent organic frameworks with spatial-distribution defined D-A structures for efficient near-infrared photothermal conversion

Carbazole-Based Imine-Linked Covalent Organic Framework for Efficient Heterogeneous Photocatalysis

“…To enhance the photocatalytic performance, the construction of D−A COFs has provided a new strategy to improve the charge transport and charge separation properties. 41,42 In 2019, Chen's group provided a strategy to integrate the donor−acceptor unit into the COF framework. 43 In this study, we designed and synthesized CzDA-TAPT-COF, containing an electron-donating carbazole unit and an electron-accepting triazine unit to build the D−A structure, 48 and compared the photocatalytic activity with the reported benzothiadiazole-based heterogeneous and efficient photocatalyst BT-TAPT-COF.…”

“…They have several advantages like long-range order, predesignability, easy modification in the structure, tunable pore size, and photophysical properties. , In recent years, COFs have been used in various applications like gas storage, − sensing, − optoelectronics, − and particularly heterogeneous photocatalysis. ,− 2D COFs are the emerging heterogeneous photocatalysts because of the following merits: (i) extensive π-conjugation system could facilitate light harvesting in the visible region, (ii) π-interaction between the layer could facilitate the transport of charge carriers, and (iii) highly ordered structure could inhibit the charge recombination and minimize the charge trapping at the defect sites. To enhance the photocatalytic performance, the construction of D–A COFs has provided a new strategy to improve the charge transport and charge separation properties. , In 2019, Chen’s group provided a strategy to integrate the donor–acceptor unit into the COF framework . These benzothiadiazole-functionalized BT-COFs (TPB-BT-COF and TAPT-BT-COF) show good activity on photoreduction of Cr­(IV) species under visible light irradiation.…”

Kagome-topology 2D covalent organic frameworks assembled from D2h-symmetric and non-centrosymmetric C2-symmetric blocks for photothermal imaging

“…The impressive photothermal conversion capacity of COF-DP makes it a promising candidate for potential applications in photothermal imaging. [40][41][42] Specifically, COF-DP powder was compacted onto a transparent glass plate to create defined shapes. When exposed to NIR light, a significant temperature increase occurred (Fig.…”