Category: 6825-20-3

《Ultrafine silver nanoparticles supported on a covalent carbazole framework as high-efficiency nanocatalysts for nitrophenol reduction》 was written by Gong, Wei; Wu, Qianqian; Jiang, Guoxing; Li, Guangji. Related Products of 6825-20-3This research focused onultrafine silver nanoparticle covalent carbazole framework support; nanocatalyst nitrophenol reduction. The article conveys some information:

A novel conjugated microporous polymer (CMP) material CZ-TEB was synthesized with a carbazole analog and 1,3,5-triethynylbenzene. It possessed a high sp. surface area, excellent thermal stability and layered-sheet morphol. Furthermore, ultrafine silver nanoparticles were successfully immobilized on CZ-TEB, thus preparing a nanocatalyst Ag0@CZ-TEB. To evaluate its catalytic performance, Ag0@CZ-TEB was exploited in the reduction reaction of nitrophenols, a family of priority pollutants. Ag0@CZ-TEB exhibited high catalytic ability, convenient recovery and excellent reusability. Strikingly, the normalized rate constant (knor) of the reduction reaction of 4-NP to 4-AP is as high as 21.49 mmol-1 s-1. This result shows a significant improvement over all previously reported work. We purposed to use a “”capture-release”” model to explain the high catalytic ability of Ag0@CZ-TEB. This explanation is supported by further exptl. results that agree well with the “”capture-release”” model. The experimental process involved the reaction of 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Related Products of 6825-20-3)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.Related Products of 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Gao, Mile; Mai, Van T. N.; Jang, Junhyuk; Ranasinghe, Chandana Sampath Kumara; Chu, Ronan; Burn, Paul L.; Gentle, Ian R.; Pivrikas, Almantas; Shaw, Paul E. published their research in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2021. The article was titled 《Effect of dendron structure on the luminescent and charge transporting properties of solution processed dendrimer-based OLEDs》.COA of Formula: C12H7Br2N The article contains the following contents:

The photophys. and charge transport properties of neat and blend films of fac-tris[2-phenylpyridinato-C2,N]iridium(III) [Ir(ppy)3]-cored light-emitting dendrimers and tris(4-carbazoyl-9-ylphenyl)amine (TCTA)-based hosts, with each combination having the same first generation dendrons were measured and compared. The first generation dendrons were composed of bis(fluorenyl)carbazolyl with Pr surface groups, or biphenyl with 2-ethylhexyloxy or t-Bu surface groups. Dendronisation of the emitter and host was found to decrease the energy transfer efficiency from the host to the guest relative to an evaporated Ir(ppy)3:TCTA blend film, with the blend composed of materials with biphenyl dendrons and t-Bu surface groups having the largest decrease. The hole mobilities of the solution processed neat and blend layers were found to be 1-2 orders of magnitude lower than those of the equivalent evaporated films. The blend film containing the host and dendrimer with first generation biphenyl dendrons and 2-ethylhexyloxy surface groups had the highest photoluminescence quantum yield (PLQY), comparable to evaporated Ir(ppy)3:TCTA-based films but the lowest hole mobility (≈10-8 cm2 V-1 s-1). In contrast, the blend with the dendrimers composed of the bis(fluorenyl)carbazolyl dendrons with Pr surface groups had a low PLQY but higher hole mobility. It was found for the combinations of these solution processable materials that the hole mobility of the blend film was the limiting factor in OLED performance. Devices containing an emissive layer of the materials with the bis(fluorenyl)carbazolyl dendrons with Pr surface groups (11 mol percent of the emitter) had a PLQY of 40.8% but the highest external quantum efficiency of 10.0 ± 0.4%, reaching a maximum luminance of almost 10 000 cd m-2. In the experimental materials used by the author, we found 3,6-Dibromo-9H-carbazole(cas: 6825-20-3COA of Formula: C12H7Br2N)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent.COA of Formula: C12H7Br2N

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《A highly fluorescent covalent organic framework as a hydrogen chloride sensor: roles of Schiff base bonding and π-stacking》 was written by El-Mahdy, Ahmed F. M.; Lai, Ming-Yi; Kuo, Shiao-Wei. Reference of 3,6-Dibromo-9H-carbazole And the article was included in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2020. The article conveys some information:

In this paper we report the extremely crystalline structures, high thermal stabilities, and strong fluorescence emissions of covalent organic frameworks (COFs) based on linked carbazole units. We have synthesized three stable luminescent carbazole-linked COFs, namely, BCTB-PD, BCTA-TP, and BCTB-BCTA, through Schiff base condensations of 4,4′,4′′,4′′′-([9,9′-bicarbazole]-3,3′,6,6′-tetrayl)tetrabenzaldehyde (BCTB-4CHO) with p-phenylenediamine (PD), of 4,4′,4′′,4′′′-([9,9′-bicarbazole]-3,3′,6,6′-tetrayl)tetraaniline (BCTA-4NH2) with terephthalaldehyde (TP), and of BCTB-4CHO with BCTA-4NH2, resp. These COFs had large Brunauer-Emmett-Teller surface areas (up to 2212 m2 g-1) and outstanding thermal stabilities (decomposition temperatures of up to 566°). Interestingly, the intramol. charge transfer (ICT) and fluorescence properties of these COFs were strongly influenced by their types of Schiff base bonding (BCTB-4CH=N or BCTA-4N=CH) and the degrees of π-stacking between their COF layers. For example, ICT from the electron-donating carbazole group to the acceptor through the Schiff base units of the type BCTB-4CH=N and increasing the π-stacking distance enhanced the fluorescence emission from the COF. Moreover, BCTB-BCTA, the most fluorescent of our three COFs, functioned as a fluorescent chemosensor for HCl in solution, with outstanding sensitivity and a rapid response. The experimental part of the paper was very detailed, including the reaction process of 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Reference of 3,6-Dibromo-9H-carbazole)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent.Reference of 3,6-Dibromo-9H-carbazole

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Heteroporous bifluorenylidene-based covalent organic frameworks displaying exceptional dye adsorption behavior and high energy storage》 was published in Journal of Materials Chemistry A: Materials for Energy and Sustainability in 2020. These research results belong to El-Mahdy, Ahmed F. M.; Zakaria, Mohamed Barakat; Wang, Hao-Xin; Chen, Tao; Yamauchi, Yusuke; Kuo, Shiao-Wei. Application of 6825-20-3 The article mentions the following:

In this study we performed one-pot polycondensations of BFTB-4CHO with PyTA-4NH2, BFTB-4NH2, and BCTA-4NH2 to prepare the bifluorenylidene-based covalent organic frameworks (COFs) BFTB-PyTA, BFTB-BFTB, and BFTB-BCTA, resp. These three COFs possessed extremely high thermal stabilities, excellent crystallinities, and high sp. surface areas. The BFTB-PyTA COF featured pores of a single size, whereas the BFTB-BFTB and BFTB-BCTA COFs had dual porosities. The COFs were exceptional adsorbers of the small dye mol. rhodamine B (RhB) in water; the maximum adsorption capacities reached as high as 2127 mg g-1, outpacing those of all previously reported COFs, conjugated polymers, activated carbons, and other common nanoporous adsorbents. In addition, our COFs reached up to 99.2% of their maximum adsorption capabilities very rapidly (within 5 min). Furthermore, these COFs displayed good performance when used in electrodes for supercapacitors, with high stability after 2000 cycles. The superior adsorption efficiencies, ultrafast kinetics, and excellent reusability endow such COFs with tremendous potential for use as materials for removing RhB-and, presumably, other organic pollutants-from wastewater. In the part of experimental materials, we found many familiar compounds, such as 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Application of 6825-20-3)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent. And it has been used in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.Application of 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Exploitation of two-dimensional conjugated covalent organic frameworks based on tetraphenylethylene with bicarbazole and pyrene units and applications in perovskite solar cells》 was published in Journal of Materials Chemistry A: Materials for Energy and Sustainability in 2020. These research results belong to Mohamed, Mohamed Gamal; Lee, Chia-Chen; El-Mahdy, Ahmed F. M.; Luder, Johann; Yu, Ming-Hsuan; Li, Zhen; Zhu, Zonglong; Chueh, Chu-Chen; Kuo, Shiao-Wei. Computed Properties of C12H7Br2N The article mentions the following:

In this work, two-dimensional conjugated covalent organic frameworks (2D-COF) based on a building block of tetraphenylethylene are successfully developed. Bicarbazole and pyrene moieties are resp. coupled with 4,4′,4′′,4′′′-(ethane-1,1,2,2-tetrayl)tetranilino (ETTA) via [4 + 4] solvothermal condensation conditions of 3,3′,6,6′-tetraformyl-9,9′-bicarbazole (Car-4CHO) and 1,3,6,8-tetrakis(4-formylphenyl)pyrene (TFPPy) to afford Car-ETTA and TFPPy-ETTA COFs. According to thermogravimetric anal. (TGA), powder X-ray diffraction (PXRD), and N2 adsorption and desorption measurements, both Car-ETTA and TFPPy-ETTA COFs exhibit excellent thermal stability, highly crystalline structure, and high sp. surface area, resp. These findings are supported by force field and ab initio calculations Furthermore, successful applications of these COFs in perovskite solar cells (PVSCs) are demonstrated owing to their well-conjugated properties and π-π interactions. While serving as interlayers in the devices, these COFs could effectively promote the interfacial charge dynamic to further optimize the resulting performance. Besides, certain interaction between COFs and perovskite also leads to an improved morphol. and crystallinity of the perovskite layer, presenting defect passivation capability. As a result, it is shown that the performance of the COF-modified PVSC could be improved from 17.40-19.80%. After reading the article, we found that the author used 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Computed Properties of C12H7Br2N)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent.Computed Properties of C12H7Br2N

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary