Tag: 300-400

《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

《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

Choi, Seung-Wan; Kim, Hyun-Min; Yoon, Suk-Young; Jo, Dae-Yeon; Kim, Sun-Kyo; Kim, Yuri; Park, Seong Min; Lee, Young-Ju; Yang, Heesun published an article in 2022. The article was titled 《Aminophosphine-derived, high-quality red-emissive InP quantum dots by the use of an unconventional In halide》, and you may find the article in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices.Category: bromides-buliding-blocks The information in the text is summarized as follows:

Aminophosphine-based red InP quantum dots (QDs) were synthesized by adopting an unconventional In precursor of InBr3 instead of InCl3 and examine the effect of the type of surface halide, revealing that bromide is more advantageous in suppressing the surface oxidation and thus attains a brighter emissivity over chloride. A further improvement of InBr3-based red InP QDs toward deeper, narrower emissivity is demonstrated by the thickening of the ZnSe inner shell, resulting in a PL peak λ = 621 nm and bandwidth of 44 nm along with a quantum yield of 86%. These high-quality InP QDs are also tested as red electroluminescent (EL) emitters, producing promising EL outcomes in luminance and efficiency. The results came from multiple reactions, including the reaction of Indium(III) bromide(cas: 13465-09-3Category: bromides-buliding-blocks)

Indium(III) bromide(cas: 13465-09-3) is used in organic synthesis as a water tolerant Lewis acid. It efficiently catalyzes the three-component coupling of β-keto esters, aldehydes and urea (or thiourea) to afford the corresponding dihydropyrimidinones.Category: bromides-buliding-blocks

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