2023年10月1日 · Here, we report a strategy for realizing tunable electrical conductivity in COFs by intercalating redox-active guest molecules. The approach is demonstrated using COF-5 with a boronate-ester-linked two-dimensional structure and one-dimensional nanopore channels infiltrated by 7,7,8,8-tetracyanoquinododimethane (TCNQ).

2023年6月6日 · Here, to provide a useful strategy to tune the electronic character of COFs, doping effects with organic molecular acceptors, TCNQ, F 4 TCNQ, and TCNE, on the frontier orbital energy levels of sp 2 c-COF and COF366 mono- and bilayers are explored.

2023年6月6日 · 共价有机骨架（COF）是一类新兴的二维功能材料，其独特的电子特性在实际应用中发挥着关键作用。 在这里，为了提供一种有用的策略来调整 COF 的电子特性，有机分子受体、TCNQ、F 4 TCNQ和 TCNE 的掺杂效应对 sp 2 c-COF 和 COF366 单层和双层的前沿轨道能级的影响如下：探索过。 由于电荷从 COF 转移到掺杂剂，费米能级转移到较低的能量并落入 sp 2的顶部价带c-COF和COF366，COF的VBM/CBM能级也降低。 此外，增加的电子密度将掺杂剂 …

2021年9月8日 · Here an all-carbon linked 3D covalent organic framework (COF) is introduced by employing a templated surface reaction in a continuous flow (TSRCF). The presented method of synthesis provides spatial control over the reaction chemistry and allows for the creation of ultrasmooth COF films of desired thickness and significant crystallinity.

Finally, we show that p -type COFs are amenable to doping with electron acceptors and report an unusual charge-transfer complex with tetracyanoquinodimethane (TCNQ). We prepared thiophene-based COF (T-COFs) under conditions mimicking those used for the synthesis of the prototypical COF-5.

Benefiting from the increased conductivity, the addition of BPTA-TAPD-COF@TCNQ in the device led to the highest power conversion efficiency of 24.68% with long-term stability in harsh conditions. This work provides an example of using COFs as additives of HTL to enable improvements of both efficiency and stability for PSCs.

The existence of TCNQ molecules within the pores of MOF@COF is further confirmed through a combination of TEM and pore size distribution analysis. CV images reveal that MOF@COF-TCNQ-based electrode exhibits more rectangular shapes.

2024年4月13日 · DFT calculations indicated a relaxation in electron binding in COFs, resulting in the highest occupied molecular orbital being positioned higher than the LUMO of TCNQ (Fig. 5C). This configuration facilitates efficient electron flow towards TCNQ, establishing a CT pathway between COFs and TCNQ, which serves not only as an efficient emission ...

The porous structure of the crystalline TTF-COF thin film allows the diffusion of dopants such as I 2 and tetracyanoquinodimethane (TCNQ) for redox reactions, while the closely packed 2D grid sheets facilitate the cross-layer delocalization of thus-formed TTF radical cations to generate more conductive mixed-valence TTF species, as is verified ...

Redox-active covalent organic frameworks (COFs) are promising electrode materials for metal-ion batteries owing to their tunable electrochemical properties, adjustable structure, and resource availability.