配合四基诺二甲衍生物与三 (pentafluorophenyl) 提供更强的p-dopants增强稳定性
Ahmed E Mansour1,2, Ross Warren2, Dominique Lungwitz2
1Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany.
ACS applied materials & interfaces
|September 20, 2023
概括
新的分子兴奋剂,FxTCN ((N) Q-4 ((BCF),显著增强有机半导体兴奋剂. 这些复合物提供了更高的氧化强度和稳定性,提高了光电子设备的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 半导体物理 半导体物理
背景情况:
- 对稳定,耐扩散的分子剂的需求,以提高有机光电子设备的性能.
- 传统的p-dopants的局限性,比如7,7,8,8-tetracyanoquinodimethane (TCNQ) 衍生物 (例如,F4TCNQ,F6TCNNQ) 包括高电离能聚合物的氧化强度不足和显著的扩散.
- 需要先进的剂来克服现代聚合物半导体带来的挑战.
研究的目的:
- 开发具有增强氧化强度和抗扩散稳定的分子剂.
- 通过协调FxTCN(N) Q与三 (pentafluorophenyl) (BCF) 来制造新型兴奋剂复合物的简单方法进行研究.
- 评估这些新复合物在聚合物半导体中的兴奋剂效率和稳定性.
主要方法:
- 一个单阶段的溶液混合过程,以合成重的剂复合物:FxTCN(N) Q-4(BCF).
- 在溶液和薄膜上进行光学吸收光谱,以评估各种聚合物半导体 (IE高达5.9 eV) 的兴奋剂效率.
- 使用聚3-基thiophene-2,5-diyl) (P3HT) 进行电传输测量,以确认兴奋剂的效率和稳定性.
主要成果:
- 与单独使用FxTCN (N) Q或BCF相比,FxTCN (N) Q-4 (BCF) 综合体的兴奋剂效率显著更高.
- 与F4TCNQ相比,F4TCNQ-4 (BCF) 在P3HT中显示出更高的兴奋剂效率.
- 由于F4TCNQ-4 (BCF) 的体积较大,使其在P3HT中增强了对电场诱导漂移的稳定性.
结论:
- 与BCF分子的协调有效地增加了FxTCN(N) Q辅助剂的氧化强度.
- 开发的FxTCN (N) Q-4 (BCF) 复合物是有机半导体的高效和稳定的p-dopants.
- 这种简单的溶液混合方法为推进有机电子技术提供了可访问的,增强的分子剂.
相关概念视频
02:42Valence Bond Theory
8.7K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.7K
01:24ortho–para-Directing Deactivators: Halogens
5.6K
Halogens are ortho–para directors. They are more electronegative than carbon. Therefore, as ring substituents, they can withdraw electrons through the inductive effect and deactivate the aromatic ring towards electrophilic substitution. Halogens also have an electron-donating resonance effect on the ring, which influences the orientation of the incoming electrophile. If an electrophile attacks at the ortho or the para position, the halogen donates electrons and stabilizes the intermediate...
5.6K
01:11ortho–para-Directing Activators: –CH3, –OH, –NH2, –OCH3
6.1K
All ortho–para directors, excluding halogens, are activating groups. These groups donate electrons to the ring, making the ring carbons electron-rich. Consequently, the reactivity of the aromatic ring towards electrophilic substitution increases. For instance, the nitration of anisole is about 10,000 times faster than the nitration of benzene. The electron-donating effect of the methoxy group in anisole activates the ortho and para positions on the ring and stabilizes the corresponding...
6.1K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
42.8K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
42.8K
02:34Structural Isomerism
19.3K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
19.3K
01:18Directing and Steric Effects in Disubstituted Benzene Derivatives
3.1K
When disubstituted benzenes undergo electrophilic substitution, the product distribution depends on the directing effect of both substituents. When the directing effects of both substituents reinforce each other, a single product is obtained. For example, bromination of p-nitrotoluene occurs ortho to the methyl group and meta to the nitro group, which is the same position, resulting in a single product. However, if the directing effects of the two groups oppose each other, the...
3.1K