Tag: 300-400

《Trivalent ion mediated abnormal growth of all-inorganic perovskite nanocrystals and their divergent emission properties》 was written by Dong, Xunyi; Acheampong Tsiwah, Emmanuel; Li, Tan; Hu, Junjie; Li, Zixiong; Ding, Yanxi; Deng, Zhao; Chen, Wenhui; Xu, Like; Gao, Peng; Zhao, Xiujian; Xie, Yi. Related Products of 13465-09-3This research focused ontrivalent ion dopped inorganic perovskite nanocrystal photoluminescence optical absorption. The article conveys some information:

In this work, a new trivalent ion-mediated one-pot synthetic protocol is reported to create two well-defined optical absorbance and photoluminescence (PL) emissions in all-inorganic halide perovskite nanocrystals (NCs). The foreign M3+ cations (M = Bi, Al, In), typically from BiBr3, BiFeO3, BiCl3, AlBr3 or InBr3, function as capping ligands for generating a growth-constrained thinner nanoplatelet (NPL) population displaying the quantum confinement effect. The formation mechanism of the growth-constrained NPLs is proposed based on d. functional theory (DFT) on the different slab energy of the representative NPLs achieved in the presence of Bi3+ ions and the d. of states (DOS) of the supposed bulk perovskites. Notably, the formation of two groups of NCs with different sizes allows for the generation of dual optical absorbance and PL emissions. The influence of the M : Pb molar ratios on the precursors is systematically elucidated, from which the relative intensity and position of each PL emission can be fine-tuned. By virtue of the representative NPLs with well-defined green and blue emissions, the M3+-assisted synthetic protocol provides a facile and cost-effective route for producing unique NCs and nanostructures for optoelectronic device applications. After reading the article, we found that the author used Indium(III) bromide(cas: 13465-09-3Related Products of 13465-09-3)

Indium(III) bromide(cas: 13465-09-3) is used as a catalyst to produce dithioacetals when unactivated alkynes react with thiols and fields such as optics and microelectronics that utilize semiconductor technology have wide uses for indium in high-performing solar cells.Related Products of 13465-09-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Recommanded Product: 9,10-DibromoanthraceneIn 2020 ,《””Metal-Free”” Fluorescent Supramolecular Assemblies for Distinct Detection of Organophosphate/Organochlorine Pesticides》 was published in ACS Omega. The article was written by Sharma, Pooja; Kumar, Manoj; Bhalla, Vandana. The article contains the following contents:

The “”metal-free””, easy-to-prepare fluorescent supramol. assemblies based on anthracene/perylene bisamide (PBI) derivatives have been developed for the distinct detection of organophosphate (CPF) and organochlorine (DCN) pesticides in aqueous media. The supramol. assemblies of anthracene derivative show rapid and highly selective “”on-on”” response toward organophosphate (CPF), which is attributed to the formation of CPF-induced formation of “”closely packed”” assemblies. A detection limit in the nanomolar range is observed for CPF. On the other hand, the inner filter effect is proposed as the mechanism for the “”on-off”” detection of DCN using supramol. assemblies of the anthracene derivative This is the first report on the development of fluorescent materials having the potential to differentiate between organophosphate and organochlorine pesticides. The assemblies of anthracene derivative (I) also act as “”enzyme mimic”” as organophosphate pesticide show a preferential affinity for assemblies of derivative I over acetylcholinesterase enzyme. Further, the real-time applications of supramol. assemblies have also been explored for the detection of CPF and DCN in spiked water and in agricultural products such as grapes and apples. The experimental part of the paper was very detailed, including the reaction process of 9,10-Dibromoanthracene(cas: 523-27-3Recommanded Product: 9,10-Dibromoanthracene)

9,10-Dibromoanthracene(cas: 523-27-3) is a dibrominated polycyclic aromatic hydrocarbon (PAH). 9,10-Dibromoanthracene is often used as an energy acceptor and activator in reactions that produce chemiluminescence.Recommanded Product: 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Quality Control of 3,6-Dibromo-9H-carbazoleIn 2022 ,《Functionalization of Biphenylcarbazole (CBP) with Siloxane-Hybrid Chains for Solvent-Free Liquid Materials》 was published in Molecules. The article was written by Shaya, Janah; Correia, Gabriel; Heinrich, Benoit; Ribierre, Jean-Charles; Polychronopoulou, Kyriaki; Mager, Loic; Mery, Stephane. The article contains the following contents:

Herein the synthesis of siloxane-functionalized CBP mols. (4,4′-bis(carbazole)-1,1′-biphenyl) for liquid optoelectronic applications was reported. The room-temperature liquid state was obtained through a convenient functionalization of the mols. with heptamethyltrisiloxane chains via hydrosilylation of alkenyl spacers. The synthesis comprised screening of metal-catalyzed methodologies to introduce alkenyl linkers into carbazoles (Stille and Suzuki Miyaura cross-couplings), incorporated the alkenylcarbazoles to dihalobiphenyls (Ullmann coupling), and finally introduced the siloxane chains. The used conditions allowed the synthesis of the target compounds, despite the high reactivity of the alkenyl moieties bound to π-conjugated systems toward undesired side reactions such as polymerization, isomerization, and hydrogenation. The features of these solvent-free liquid CBP derivatives made them potentially interesting for fluidic optoelectronic applications.3,6-Dibromo-9H-carbazole(cas: 6825-20-3Quality Control of 3,6-Dibromo-9H-carbazole) was used in this study.

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.Quality Control of 3,6-Dibromo-9H-carbazole

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Wang, Dinghui; Wang, Jun; Wang, Yan; Yang, Yingwei published an article in Molecules. The title of the article was 《A Fluorescent Linear Conjugated Polymer Constructed from Pillararene and Anthracene》.Safety of 9,10-Dibromoanthracene The author mentioned the following in the article:

Over the past few years, conjugated polymers (CPs) have aroused much attention owing to their rigid conjugated structures, which can perform well in light harvesting and energy transfer and offer great potential in materials chem. In this article, we fabricate a new luminescent linear CP p(P[5](OTf)2-co-9,10-dea) via the Sonogashira coupling of 9,10-diethynylanthracene and trifluoromethanesulfonic anhydride (OTf) modified pillar[5]arene, generating enhanced yellow-green fluorescence emission at around 552 nm. The reaction condition was screened to get a deeper understanding of this polymerization approach, resulting in an excellent yield as high as 92% ultimately. Besides the optical properties, self-assembly behaviors of the CP in low/high concentrations were studied, where interesting adjustable morphologies from tube to sheet were observed In addition, the fluorescence performance and structural architecture can be disturbed by the host-guest reorganization between the host CP and the guest adiponitrile, suggesting great potential of this CP material in the field of sensing and detection. In addition to this study using 9,10-Dibromoanthracene, there are many other studies that have used 9,10-Dibromoanthracene(cas: 523-27-3Safety of 9,10-Dibromoanthracene) was used in this study.

9,10-Dibromoanthracene(cas: 523-27-3) is a dibrominated polycyclic aromatic hydrocarbon (PAH). 9,10-Dibromoanthracene is often used as an energy acceptor and activator in reactions that produce chemiluminescence.Safety of 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Cheng, Guoqing; Hayashi, Takuya; Miyake, Yuya; Sato, Takashi; Tabata, Hiroshi; Katayama, Mitsuhiro; Komatsu, Naoki published an article in ACS Nano. The title of the article was 《Interlocking of Single-Walled Carbon Nanotubes with Metal-Tethered Tetragonal Nanobrackets to Enrich a Few Hundredths of a Nanometer Range in Their Diameters》.Formula: C14H8Br2 The author mentioned the following in the article:

The authors have separated C nanotubes through host-guest complexation using host mols. named nanotweezers and nanocalipers. A host mol. named tetragonal M-nanobrackets, consisting of a pair of dipyrrin nanocalipers corresponding to two brackets and tethered by two metals (M), is designed, synthesized, and employed to sep. single-walled C nanotubes (SWNTs). A facile three-step process including 1-pot Suzuki coupling is developed to prepare M-nanobrackets in a 37% total yield (M = Cu). Upon extraction of SWNTs with a square nanobracket and Cu(II), in situ formed tetragonal M-nanobrackets interlock SWNTs to disperse them in iso-PrOH. Interlocking is confirmed by absorption and Raman spectroscopy as well as transmission electron and at. force microscopy. Especially, Raman spectroscopy was used to prove the interlocking of SWNTs; Cu-nanobrackets inherent resonance Raman signals and affect the SWNT signals, or a radial breathing vibration, due to the rigid rectangular structure of Cu-nanobrackets. The interlocking is facilely and thoroughly released through demetalation to recover pristine SWNTs and the square nanobracket. Such chem. controlled locking and unlocking for SWNTs are one of the characteristics of the authors’ separation process. This enables a precise evaluation by Raman, photoluminescence, and absorption spectroscopy of the diameter selectivity to SWNTs, revealing the diameter enrichment of only three kinds of SWNTs, (7,6), (9,4), and (8,5), in the 0.02 nm diameter range from 0.90 to 0.92 nm among ~20 kinds of SWNTs from 0.76 to 1.17 nm in their diameter range.9,10-Dibromoanthracene(cas: 523-27-3Formula: C14H8Br2) was used in this study.

9,10-Dibromoanthracene(cas: 523-27-3) can be sublimated and oxidized to generate anthraquinone. Soluble in hot benzene and hot toluene, slightly soluble in alcohol, ether and cold benzene, insoluble in water.Formula: C14H8Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Hu, Liqun; Liu, Yibing; Fang, Xiong; zheng, Yuzhu; Liao, Rong-zhen; Li, Man; Xie, Youwei published an article in ACS Catalysis. The title of the article was 《An Intermolecular Hydroarylation of Highly Deactivated Styrenes Catalyzed by Re2O7/HReO4 in Hexafluoroisopropanol》.Safety of Ethyltriphenylphosphonium bromide The author mentioned the following in the article:

Here, authors describe an activation mode for unactivated alkenes on the basis of a synergy between Re2O7/HReO4 and hexafluoroisopropanol (HFIP). Highly electron-deficient styrenes have been activated to effect a challenging intermol. hydroarylation with different arenes to give a variety of diarylalkanes in high efficiency. This method is characterized by mild reaction condition, broad substrate scope, high chem. yields, and minimal waste generation. The potential synthetic application of this methodol. was exemplified by the efficient synthesis of a retinoic acid receptor (RAR) agonist. DFT calculations and deuterium-labeling experiments were conducted to elucidate the reaction mechanism, and both confirmed the critical role of HFIP, which significantly reduced the energetical barriers for several key steps of this transformation via a network of hydrogen bonding to perrhenate anion with two equivalent of HFIP. In addition to this study using Ethyltriphenylphosphonium bromide, there are many other studies that have used Ethyltriphenylphosphonium bromide(cas: 1530-32-1Safety of Ethyltriphenylphosphonium bromide) was used in this study.

Ethyltriphenylphosphonium bromide(cas: 1530-32-1) is a phase transfer catalyst, used to accelerate the cure of phenolic-based epoxy resins, certain fluoroelastomer resins and thermosetting powder coatings. It is also used as catalysts in the synthesis of certain organic compounds and as a pharmaceutical intermediate.Safety of Ethyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wood, Devin P.; Guan, Weiyang; Lin, Song published their research in Synthesis in 2021. The article was titled 《Titanium and Cobalt Bimetallic Radical Redox Relay for the Isomerization of N-Bz Aziridines to Allylic Amides》.Computed Properties of C20H20BrP The article contains the following contents:

Herein, a bimetallic radical redox-relay strategy is employed to generate alkyl radicals under mild conditions with titanium(III) catalysis and terminated via hydrogen atom transfer with cobalt(II) catalysis to enact base-free isomerizations of N-Bz aziridines I [R1R3 = (CH2)3, R2 = H; R1R2 = CH2NTsCH2CH2, R3 = H; R1 = MeO2C(CH2)7, R2 = R3 = H; etc] to N-Bz allylic amides II. This reaction provides an alternative strategy for the synthesis of allylic amides from alkenes via a three-step sequence to accomplish a formal transpositional allylic amination. The experimental part of the paper was very detailed, including the reaction process of Ethyltriphenylphosphonium bromide(cas: 1530-32-1Computed Properties of C20H20BrP)

Ethyltriphenylphosphonium bromide(cas: 1530-32-1) is a phase transfer catalyst, used to accelerate the cure of phenolic-based epoxy resins, certain fluoroelastomer resins and thermosetting powder coatings. It is also used as catalysts in the synthesis of certain organic compounds and as a pharmaceutical intermediate.Computed Properties of C20H20BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《9,10-Di(hydroxymethylphenyl)anthracenes: Highly efficient triplet annihilators with small singlet-triplet energy gap (ΔEST) and planar configuration》 was published in Dyes and Pigments in 2020. These research results belong to Yu, Xue; Fan, Congbin; Dai, Guoliang; Wang, Xiaomei; Ye, Changqing; Tao, Xutang. Recommanded Product: 523-27-3 The article mentions the following:

A series of 9,10-di(hydroxymethylphenyl)anthracene chromophores (named as E-o-DHMPA, Z-o-DHMPA, m-DHMPA and p-DHMPA) are designed to tailor triplet-triplet annihilation upconversion through isomer engineering. It was found that improving mol. planarity makes for mol. π-π interaction, meanwhile, mol. excited singlet energy level (ES1) shows decreasing; however, the triple energy level (ET1) exhibits almost equal. Thus, small singlet-triplet energy gap (ΔEST) of chromophores could be designed. Selective excitation of sensitizer (palladiumIItetrabromophenylporphyrin, PdBrTPP) in solution containing annihilator results in the upconversion (UC) efficiency (ΦUC) increasing from E-o-DHMPA (15.9%), Z-o-DHMPA (18.7%), m-DHMPA (26.0%) to p-DHMPA (26.8%), accompanied by the excitation threshold intensity (Ith, mW·cm-2) decreasing from E-o-DHMPA (292.74), Z-o-DHMPA (174.41), m-DHMPA (36.58) to p-DHMPA (29.78), which are in agreement with the ΔEST decreasing and planarity improving of these isomers. Annihilator with small energy gap (ΔEST) and planar configuration has contribution to triplet-triplet annihilation (TTA), supported by the fact of the Ith value reducing, and thereby increasing UC efficiency (ΦUC), which provides a new strategy for mol. design to develop new triplet annihilator. Finally, the TTA-UC powered photolysis of bilirubin was conducted for the first time, suggesting that TTA-UC can act as an effective light source used in the light therapy for neonatal hyperbilirubinemia. In the part of experimental materials, we found many familiar compounds, such as 9,10-Dibromoanthracene(cas: 523-27-3Recommanded Product: 523-27-3)

9,10-Dibromoanthracene(cas: 523-27-3) is synthesized by the bromination of anthracene. The bromination reaction is carried out at room temperature using carbon tetrachloride as a solvent. Using 80-85% anthracene as raw material, adding bromine to react for half an hour, the yield is 83-88%.Recommanded Product: 523-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Formula: Br3InIn 2020 ,《In Situ Transmission Electron Microscopy Measurements of Ge Nanowire Synthesis with Liquid Metal Nanodroplets in Water》 was published in ACS Nano. The article was written by Cheek, Quintin; Fahrenkrug, Eli; Hlynchuk, Sofiya; Alsem, Daan Hein; Salmon, Norman J.; Maldonado, Stephen. The article contains the following contents:

The growth of Ge nanowires in water inside a liquid transmission electron microscope (TEM) holder has been demonstrated at room temperature Each nanowire growth event was stimulated by the incident electron beam on otherwise unsupported liquid Ga or liquid In nanodroplets. A variety of conditions were explored, including liquid metal nanodroplet surface condition, liquid metal nanodroplet size and d., formal concentration of dissolved GeO2, and electron beam intensity. The cumulative observations from a series of videos recorded during growth events suggested the following points. First, the conditions necessary for initiating nanowire growth at uncontacted liquid metal nanodroplets in a liquid TEM cell indicate the process was governed by solvated electrons generated from secondary electrons scattered by the liquid metal nanodroplets. The attained current densities were comparable to those achieved in conventional electrochem. liquid-liquid-solid (ec-LLS) growths outside of a TEM. Second, the surface condition of the liquid metal nanodroplets was quite influential on whether nanowire growth occurred and surface diffusion of Ge adatoms contributed to the rate of crystallization Third, the Ge nanowire growth rates were limited by the feed rate of Ge to the crystal growth front rather than the rate of crystallization at the liquid metal/solid Ge interface. Estimates of an electrochem. current for the reduction of dissolved GeO2 were nominally in line with currents used for Ge nanowire growth by ec-LLS outside of the TEM. Fourth, the Ge nanowire growths in the liquid TEM cell occurred far from thermodn. equilibrium, with supersaturation values of 104 prior to nucleation. These collective points provide insight on how to further control and improve Ge nanowire morphol. and crystallog. quality by the ec-LLS method.Indium(III) bromide(cas: 13465-09-3Formula: Br3In) was used in this study.

Indium(III) bromide(cas: 13465-09-3) is used as a catalyst to produce dithioacetals when unactivated alkynes react with thiols and fields such as optics and microelectronics that utilize semiconductor technology have wide uses for indium in high-performing solar cells.Formula: Br3In

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Formula: C12H7Br2NIn 2022 ,《Occurrence and distribution of polyhalogenated carbazoles in eastern Tibetan Plateau soils along the slope of Mt. Qionglai》 appeared in Chemosphere. The author of the article were Liu, Mingkai; Huang, Longhua; Li, Xiaoshuang; Liu, Fei; Zhang, Wei; Wang, Zhe; Xu, Yan; Ke, Runhui; He, Hongping; Lou, Yinghua. The article conveys some information:

Polyhalogenated carbazoles (PHCZs), are considered as potential persistent organic pollutants (POPs), which have been frequently detected in the environment. However, the altitudinal distribution characteristics and possible sources of PHCZs in high mountain soils are still unknown. The present study was the first to analyze PHCZs in soil samples collected along the eastern slope of Mt. Qionglai (MQ), the east edge of the Tibetan Plateau. The concentration of ΣPHCZs (based on dry weight) ranges from 14.4 to 107 ng/g (median value of 40.9), which was at high end of the range reported in soils and sediments to date in the literature. The composition profiles of PHCZs in the soils of MQ were dominated by 3,6-dichlorocarbazole (36-CCZ), 3-chlorocarbazole (3-CCZ), and 2-bromocarbazole (2-BCZ). The mean TOC-normalized concentrations of ΣPHCZs in soil samples from below-treeline (2092 ng/g TOC) were higher than those from alpine meadow (1124 ng/g TOC), probably due to the forest filter effect. The decreasing trend of the PHCZs TOC-normalized concentrations with altitude shows that accumulation of PHCZs from the alpine meadow samples was not affected by the mountain cold-trapping effect. Significantly pos. correlations were observed between the concentrations of more than half of detected PHCZ congeners and TOC. In addition, PHCZs show the potential to represent a class of POPs with the frequent occurrence and wide distribution, as the abundance and environmental behavior of PHCZs are similar to some POPs in MQ. In the experimental materials used by the author, we found 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Formula: 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 in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.Formula: C12H7Br2N

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary