Application of fully conjugated covalent organic frameworks in photocatalytic carbon dioxide reduction performance

Lei, Tian; Mi, Yongsheng; Wei, Zihao; Li, Sheng‐Hua; Pang, Siping

doi:10.1039/d2dt03743b

“…More recently, Lei et al 108 used TMT and 1,2-di(4 0formylphenyl)acetylene (L-PH-A-CHO) to prepare an alkyne containing COF, COF-TMT-A. Despite the relatively low specific surface area (221 m 2 g À1 ), the presence of the alkyne group and the conjugated p-electron character of COF-TMT-A optimized its electronic band structure, and the fluorescence lifetime was measured as 4.499 ns.…”

Section: Linkagesmentioning

confidence: 97%

Porous covalent organic frameworks in photocatalytic ROS-mediated processes

Karousis,

Tasis

2024

Energy Adv.

5

0

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“…因此邱建丁课题组 [69] 在炔基的引入不仅增强了 π-电子离域特性, 还优化了电子能带结构, 有利于电子的高效离域和输运 [55] . 庞思平课题组 [70] [71] 和 1,3,5-三(4-氰基甲基苯基)苯(TCPB)进行 Knoevenagel 缩合得到了 TCPB-DMTA-COF(图 22) [72] . 与单体 TCPB 和 DMTA 相比 , 完全 π-共轭 TCPB-DMTA-COF 由于形成框架结构而显著提高了 ECL 发射, 分别是 TCPB 单体和 DMTA 单体的 125 倍和 41.7 倍.…”

Section: 此外腈基与邻近的芳香环之间的空间碰撞也可能导致unclassified

Research Progress of Carbon-carbon Bond Linked Two-dimensional Covalent-Organic Frameworks

Wei,

Wang,

Li

et al. 2024

Acta Chimica Sinica

0

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Two-dimensional polymers (2DPs) are a type of planar polymer materials that possess regular porous structures. They fulfill the demand for thin, high-performing, and stable materials in flexible devices, making them highly potential candidates for applications in the field of flexible electronics. As a special class of covalent two-dimensional polymer materials, two-dimensional covalent organic frameworks (COFs) refer to crystalline porous materials with a two-dimensional topology formed by connecting π-conjugated building units through covalent bonds. The unique electronic structure of COFs gives them better electrical properties compared to other two-dimensional polymers. Furthermore, their unique periodic porous structure, high specific surface area, and excellent stability make them highly suitable for various applications such as ion transport, optoelectronic materials, and catalysis. Among these, carbon-carbon bond-linked COFs are regarded as one of the most promising types of two-dimensional polymers due to their excellent stability and good crystallinity. In recent years, many carbon-carbon bonded COFs with different structures and excellent properties have emerged based on different design principles and synthesis strategies. In this review, we summarize and introduce four common synthesis methods for preparing C＝C bonded COFs, namely solvent-thermal method, melt-polymerization method, interface polymerization method, and copper template method. Furthermore, we categorize C＝C bonded COFs into four classes: [C2＋C3], [C2＋C2], [C3＋C3], and [C4＋C2], according to the topological structure of the building units. We focus on analyzing the relationship between the composite structure of these COFs and their stability, electrical properties, catalytic performance, and other properties. Additionally, we compile and summarize the research progress of C＝C bonded COFs in terms of synthesis methods, structural innovation, performance improvement, and practical applications. This compilation will be beneficial for researchers in the subsequent studies of C＝C bonded COFs to select building units based on target structure and performance application and conduct pre-design. Furthermore, this review also includes previously overlooked C-C bonded COFs, providing a more comprehensive reference. In summary, this review aims to provide guidance for researchers in related fields to better design and synthesize multifunctional crystalline porous materials, thereby promoting the further development and application of carbon-carbon bond-linked COFs in various fields.

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“…75 CTFs containing triazine rings linked by both vinyl and acetylene groups, such as COF-TMT-A, have exhibited excellent performance in the photocatalytic CO 2 RR. 76 In comparison to CTFs without acetylene groups, these materials demonstrated significantly improved photocatalytic performance for the CO 2 RR, with a remarkable 99% selectivity towards the product HCOO − .…”

Section: Strategies For Improving the Photocatalytic Activity Of Ctfsmentioning

confidence: 99%

“…75 CTFs containing triazine rings linked by both vinyl and acetylene groups, such as COF-TMT-A, have exhibited excellent performance in the photocatalytic CO 2 RR. 76 In comparison to CTFs without acetylene groups, these materials demonstrated signicantly improved photocatalytic performance for the CO 2 RR, with a remarkable 99% selectivity towards the product HCOO − . Obviously, the introduction of specic functional groups plays a pivotal role in modulating the substrate affinity, conjugated structure, and inherent photoelectric characteristics of CTFs (Fig.…”

mentioning

confidence: 99%