相关实验视频

Updated: Jul 14, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Published on: July 10, 2017

设计,合成和超快速载体动力学,以核心替代的纳夫他林二胺基共价有机框架为基础

Yafang Luo¹, Zhen Chang¹, Jiajie Pei¹

¹College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, Fujian, P. R. China.

|October 9, 2023

概括

研究人员使用cNDIs开发了可调节的带隙2DCOF. 电子捐赠组和层间距离控制带隙,增强太阳能电池和光催化剂的电荷移位.

科学领域:

材料科学材料科学材料科学
有机化学有机化学
摄影化学的使用.

背景情况:

二维共价有机框架 (2D COF) 是能源应用的有希望的材料.
调整二维COF的电子特性对于优化其性能至关重要.

研究的目的:

设计和合成基于核心替代纳二胺基 (cNDIs) 的新型二维COF.
调查电子捐赠替代物和层间距离对带隙和电荷移位的影响.
探索这些材料在太阳能电池和光催化剂中的潜力.

主要方法:

2D COF 材料的合成.
循环电压计 (CV) 用于电子属性分析.
密度函数理论 (DFT) 计算用于带隙预测.
五秒短暂吸收 (TA) 光谱用于电荷动态研究.

主要成果:

在不改变全球结构的情况下,成功合成了具有可调节带隙的2D COF.
与电子捐赠替代物 (COFcNDI-OEt,COFcNDI-SEt) 配备的COF与COFNDI-H相比,呈现出更高的HOMO/LUMO水平和更窄的带隙.
带隙受电子捐赠替代物和层间距离的影响.
电子供体替代物促进了电荷移位,从而导致更长的电荷重组寿命.

结论:

2D COF 中可调节的带隙可以通过战略替代物修改和层间距离控制来实现.
增强的电荷移位和延长电荷载体寿命是高性能光电子设备的关键.
这些基于cNDI的2D COF显示了太阳能电池和光催化剂应用的巨大潜力.

关键词:

航母动力学航母动力学共价有机框架是共价有机框架.纳夫他二胺基化物聚胺聚胺的使用方法替代效应是一种替代效应.

更多相关视频

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

Published on: February 10, 2023

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

相关概念视频

Aromatic Hydrocarbon Cations: Structural Overview

Aromatic Hydrocarbon Cations: Structural Overview

Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...

Structure of Conjugated Dienes

Structure of Conjugated Dienes

Introduction
Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...

Aromatic Hydrocarbon Anions: Structural Overview

Aromatic Hydrocarbon Anions: Structural Overview

Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
Due to the absence of continuous...

[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction

[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction

The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...

Network Covalent Solids

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...