Conjugated Structure
共轭结构

Conjugated Structure(共轭结构)研究综述

Conjugated Structure 共轭结构 - Small-molecule organic semiconductors have displayed remarkable electronic properties with a multitude of π-conjugated structures developed and fine-tuned over recent years to afford highly efficient hole- and electron-transporting materials. ^[1] With the distinct 2D-conjugated structure and the s*(Si)–p*(C) bond interaction of the trialkylsilyl substitution, the electron-donating unit of 4,8-bis(5-(tripropylsilyl)thiophen-2-yl)benzo[1,2-b:4,5-b']dithiophenes (BDTT-Si) shows large potential to construct promising photovoltaic polymers. ^[2] The recognition mechanism of PPAK depended on the protonation of the pyridine groups under acidic conditions and the attack of hydroxyl toward the carbonyl group to break down the conjugated structure under alkaline conditions, respectively. ^[3] Herein, three conjugated dianhydrides, pyromellitic dianhydride, 1,4,5,8-naphthalenetetracarboxylic dianhydride and 3,4,9,10-perylenetetracarboxylic dianhydride are comparatively investigated to elucidate the effects of conjugated structure on the Mg2+ storage performances. ^[4] The introduced thiophene π-bridges and chlorine atoms in the conjugated structure further optimized light absorption and the energy level of the polymers. ^[5] Free HNA has an orange emission at 580 nm, but after addition of Cys/Hcy, the conjugated structure of probe HNA was destroyed by the attack of sulfhydryl, resulting in a new green emission at 507 nm. ^[6] Rapid heating produces g-C3N4 with loose thin layers, a larger surface area, more amino defects, and more conjugated structure; these characteristics promote adsorption and photocatalysis. ^[7] Due to the interrupted π-conjugated structure of the Resorufin dye, the free sensor showed very weak absorption and fluorescence. ^[8] So, our proposed HEF effect as a new photoactivation strategy can efficiently improve the fluorescence (FL) emission of optical materials by creating a large π-conjugated structure. ^[9] The conjugated structure and carboxyl, hydroxyl and amino groups on Cu1. ^[10] The functionalized COF-SQ-Ph with an extended π-conjugated structure and enhanced structural stability was used as the sulfur loading recipient to prepare sulfur cathodes for lithium-sulfur batteries. ^[11] The phosphorescence mechanism and the effects of element doping, rigidity of structure, and conjugated structure on their properties are reviewed to address these issues. ^[12] In this study, 4-allyloxy-2-hydroxybenzophenone (AHB) with polar functional groups and a conjugated structure was grafted onto PP via melt grafting to improve its electrical properties. ^[13] Conducting polymers have taken a leading place recently due to their conjugated structures and attractive features. ^[14] Its π-conjugated structure with unique sp–sp2 bonding demonstrates a great potential for electrocatalysis. ^[15] Benzylidene piperidones (CZ-PD, TPA-PD, and PTZ-PD) with conjugated structure were synthesized by the aldol condensation of aromatic aldehyde and N-benzyl piperidone. ^[16] Graphdiyne polymers have interesting electronic properties due to their π-conjugated structure and modular composition. ^[17] Graphdiyne (GDY), a new two-dimensional (2D) carbon allotrope with single-atom thickness that features unique sp-sp2 carbon atoms, uniform pores, and highly π-conjugated structures. ^[18] 4-Alkoxy- and 4-aryloxy-2-methyltetrahydroquinazoline N-oxides were investigated in the condensation reactions with aromatic aldehydes to give a series of novel π-conjugated structures with fluorescent properties. ^[19] The microstructure engineering using IJP provides fabrication of the cermet NiO-SDC layer with a conjugated structure, which ultimately enhances the catalytic activity of the SOFC. ^[20] Lately, a series of adsorbents with conjugated structures were developed and found to be efficient for the removal of seriously hazardous radionuclide iodine. ^[21] Organic semiconductors can be designed and constructed in π-stacked structures instead of the conventional π-conjugated structures. ^[22] BT has a good rigid structure with excellent electrochemical behaviors, which is beneficial for avoiding the destruction of the conjugated structure as much as possible during the preparation of Pdots, thus maintaining good redox property. ^[23] Variation of the conjugated structures of the photoactive unit not only endows these compounds with multiple-wavelength-triggered color control, but also enables the colored isomers to be decolored using visible light stimuli with distinct wavelengths, which allows the multiplexing optical systems to work in a more flexible and controllable way in advanced photo-controlled patterning and anti-counterfeiting applications. ^[24] s Covalent organic frameworks (COFs) are emerging crystalline porous materials linked via covalent bonding possessing flexible molecular design and synthetic strategies have been widely investigated and technologically essential materials due to their unique advantages of large surface area and porosity, high modifiable, conjugated structures and sufficient building blocks, low density, and high chemical stability. ^[25] Utilizing spent Li-ion batteries to regulate the π-conjugated structure of g-C3N4: a win-win approach for waste recycling and highly-active photocatalyst construction Bo Niu, Jiefeng Xiao and Zhenming Xu * School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People’s Republic of China Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, People’s Republic of China. ^[26] Results showed that thiophene compounds containing a conjugated structure had poor dielectric properties. ^[27] The novel compounds have rigid and conjugated structures and exhibit properties typical of o-quinones. ^[28] show that cations with large π-conjugated structures can interact with inorganic frontier molecular orbitals. ^[29] The conjugated structure and triazine ring can improve the conductivity, charge-transfer efficiency, and physicochemical stability. ^[30] Moreover, the π-conjugated structure of g-C3N4 along with proper matching between energy levels of components bring synergistic effect in this photocatalytic system. ^[31] The results showed that modifications at position 3,5 of the BODIPY core with conjugated structures have better effects on photothermal and photodynamic efficiency than the modifications at position 2,6 with halogen atoms. ^[32] show that cations with large π-conjugated structures can interact with inorganic frontier molecular orbitals. ^[33] In this study, a purely natural polysaccharide from ocean without any conjugated structure, sodium alginate (SA), is utilized as efficient electron transport layer (ETL) to replace the conjugated star molecule, poly [(9,9-bis(3'-(N,NdiMethyl)-NethylaMMoiniuM-propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)]dibroMide (PFN–Br), and modify the aluminum (Al) electrode in conventional PSCs. ^[34] Graphene's excellent electrical conductivity benefits from its highly-conjugated structure. ^[35] Herein, graphdiyne (GDY) with a unique sp/sp2 π-conjugated structure was proposed to composite with MIL-100(Fe) to form the Z-scheme photocatalyst Fe-GDY3@MIL(Fe) for dinotefuran (DTF) degradation. ^[36] Currently, most organic semiconducting materials (OSMs) are π-conjugated structures in one or two dimension (2D), where the lack of layer-layer π-conjugation connection greatly blocks their electron delocalization and transport. ^[37] Charge transfer analyses indicate that the ICT extent of Compound 3 is relatively weak compared with that of HBT-FS because of the destruction of the conjugated structure by the addition reaction of SO32–, which induces the blue-shift of the fluorescence of HBT-FS from 498 to 371 nm. ^[38] Three transformation products were tentatively identified in the cooked tissues, resulting from the cleavage of the conjugated structure or through demethylation. ^[39] Introducing two-dimensional (2D) conjugated structures to polymers is a feasible way for the design of functionalized polymers due to their good planarity, high electron/hole mobility, thermal stab. ^[40] This can be attributed to the conjugated structures of PM, which are conducive to the decrease in activation energy and separation rate of photogenerated charge carriers. ^[41] The superior sensing performance of GDY-600 can be ascribed to the highly π-conjugated structure with special acetylenic bonds and abun