Month: November 2022

Enhancing the reinforcing efficiency in CNT nanocomposites via the development of pyrene-based active dispersants was written by Yin, Xinyi;Li, Qiang;Wang, Haishui;Yang, Wengang;Zhou, Xi;Zhang, Han;Lyu, Weibang. And the article was included in RSC Advances in 2021.Quality Control of 2-Bromo-1-(pyren-1-yl)ethanone The following contents are mentioned in the article:

Various preforms of carbon nanotubes (CNTs), such as fibers, yarns, or buckypapers (BP), have been developed over the last few years in order to fabricate advanced nanocomposites containing a high volume fraction of the reinforcing phase. However, a homogeneous dispersion and an even isolation of CNTs during the fabrication process of many preforms such as BP is often challenging, while the poor interaction between CNTs and the matrix also limits the final performance of the nanocomposites. Herein, a new route to overcome these two challenges simultaneously has been demonstrated based on an active dispersant (noted as Py-PEI) developed through the quaternization reaction of pyrene derivatives (Py-Br) and polyethylenimine (PEI). The existence of pyrene groups leads to the formation of π-π stacking with CNTs, successfully hindering the re-aggregation of dispersed CNTs. Meanwhile, the amine groups of Py-PEI can establish covalent bonds with epoxy, leading to an enhanced load transfer efficiency between CNTs and epoxy in the composites. Systematic characterization of both fabricated BP and BP-reinforced nanocomposites have been performed, with significantly enhanced CNT dispersion stability in water together with improved mech. performance of the as-obtained BP/epoxy nanocomposites. This study provides a new strategy in fabricating high performance nanocomposites with the ease of nanofiller dispersion and enhanced reinforcing efficiency. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Quality Control of 2-Bromo-1-(pyren-1-yl)ethanone).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Most of the natural organobromine compounds are produced by marine organisms, and several brominated metabolites with antibacterial, antitumor, antiviral, and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.Quality Control of 2-Bromo-1-(pyren-1-yl)ethanone

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

A pyrene thiazole conjugate as a ratiometric chemosensor with high selectivity and sensitivity for tin (Sn⁴⁺) and its application in imaging live cells was written by Mahapatra, Ajit Kumar;Mondal, Sanchita;Maiti, Kalipada;Manna, Saikat Kumar;Maji, Rajkishor;Mandal, Debasish;Mandal, Sukhendu;Goswami, Shyamaprosad;Quah, Ching Kheng;Fun, Hoong-Kun. And the article was included in RSC Advances in 2014.Related Products of 80480-15-5 The following contents are mentioned in the article:

A new pyrene thiazole conjugate (PTC) amine fluoroionophore was synthesized and characterized. The single crystal XRD structure of PTC has been established. The fluoroionophore PTC showed selectivity toward Sn⁴⁺ by switching on ratiometric fluorescence among the 16 metal ions studied in HEPES buffer medium with a detection limit of 6.93μM. The interaction of Sn⁴⁺ with PTC has been further supported by absorption studies, and the stoichiometry of the complex formed (2:1) has been established on the basis of fluorescence and ESI-MS. Competitive ion titrations carried out reveal that the Sn⁴⁺ can be detected even in the presence of other metal ions of bio-importance. Moreover, the utility of the fluoroionophore PTC in showing the tin recognition in live cells has also been demonstrated using Vero 76 cells as monitored by fluorescence imaging. The tin complex of PTC was isolated, and the structure and electronic properties of [PTC-Sn] has been established by DFT and TDDFT calculations The isolated tin complex [PTC-Sn] has been used as a mol. tool for the recognition of anions on the basis of their binding affinities toward Sn⁴⁺. [PTC-Sn] is sensitive and selective toward sulfide ions among the other 12 anions studied. The selectivity has been shown on the basis of the changes observed in the emission and absorption spectral studies through the removal of Sn⁴⁺ from [PTC-Sn] by S^2-. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Related Products of 80480-15-5).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals. Organobromine compounds have fallen under increased scrutiny for their environmental impact. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.Related Products of 80480-15-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Catalytic activity and facile recovery of a cyclometalated N-heterocyclic carbene palladium(II) complex immobilized by non-covalent interactions on reduced graphene oxide was written by Karami, Kazem;Ramezanpour, Azar;Zakariazadeh, Mostafa;Silvestru, Cristian. And the article was included in Applied Organometallic Chemistry in 2019.Category: bromides-buliding-blocks The following contents are mentioned in the article:

The growing concern about the potentially adverse effects of the production of chem. compounds on the sustainable development of the environment has led to a great deal of efforts to search for low-cost and environmentally friendly catalytic systems. A pyrene-tagged N-heterocyclic carbene palladacycle complex ([Pd{(C,N)C₆H₄CH₂NH(Et)}(Imd-P)Br]) was prepared by reacting imidazolium salt with dimer ([Pd₂{(C,N)C₆H₄CH₂NH(Et)}₂(μ-OAc)₂]). Then, it was immobilized onto the surface of reduced graphene oxide (rGO) via π-π stacking forces. The hybrid compound ((NHC)Pd-rGO) was made in a one-step process. Various techniques were employed to characterize the compound In addition, computational studies were used to verify the interaction between the Pd complex and rGO. The catalytic activity of the mol. complex and hybrid material was evaluated in both Suzuki-Miyaura cross-coupling reactions and reduction of p-nitrophenol to p-aminophenol. The catalytic activity of the hybrid material was enhanced in comparison with the corresponding homogeneous analog. Thus, rGO seems to play a significant role in catalytic activity. Hot filtration experiments show the heterogeneous nature of the catalyst resulting from the strong interaction between pyrene and graphene. The hybrid (NHC)Pd-rGO material could be recycled up to six times with no decrease in catalytic activity. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Category: bromides-buliding-blocks).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Chiral Bidentate Boryl Ligand Enabled Iridium-Catalyzed Asymmetric C(sp²)-H Borylation of Diarylmethylamines was written by Zou, Xiaoliang;Zhao, Haonan;Li, Yinwu;Gao, Qian;Ke, Zhuofeng;Senmiao Xu. And the article was included in Journal of the American Chemical Society in 2019.Application In Synthesis of 2-Bromo-5′-phenyl-1,1′:3′,1”-terphenyl The following contents are mentioned in the article:

Optically active organoboronic acids and their derivatives are an important family of target compounds in organic chem., catalysis, and medicinal chem. Yet there are rare asym. catalytic examples reported for the synthesis of these compounds via atom and step economic ways. Herein, we report a chelate-directed iridium-catalyzed asym. C(sp²)-H borylation of aromatic C-H bonds directed by free amine groups. The success of these transformations relies on a novel family of chiral bidentate boryl ligands (L). They can be synthesized straightforwardly in three steps starting from readily available (S,S)-1,2-diphenyl-1,2-ethanediamie ((S,S)-DPEN). The Ir-catalyzed C(sp²)-H borylation comprises two parts. The first part is desymmetrization of prochiral diarylmethylamines. In the presence of L3/Ir, a vast array of corresponding borylated products were obtained with high regioselectivity and good to excellent enantioselectivities (26 examples, up to 96% ee). The second part, kinetic resolution of racemic diarylmethylamines, was also conducted. Good selectivity values (up to 68%, 11 examples) were obtained when L8 was used. We also demonstrated the synthetic utility of the current method on gram-scale reaction for several transformations. The C-B bonds of borylated products could be converted to a variety of functionalities including C-O, C-C, C-C, C-Br, and C-P bonds. Finally, we performed DFT calculations of desymmetrization to understand its reaction pathways. This study involved multiple reactions and reactants, such as 2-Bromo-5′-phenyl-1,1′:3′,1”-terphenyl (cas: 1890136-54-5Application In Synthesis of 2-Bromo-5′-phenyl-1,1′:3′,1”-terphenyl).

2-Bromo-5′-phenyl-1,1′:3′,1”-terphenyl (cas: 1890136-54-5) belongs to organobromine compounds. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. For many applications, organobromides represent a compromise of reactivity and cost.Application In Synthesis of 2-Bromo-5′-phenyl-1,1′:3′,1”-terphenyl

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Synthesis, characterization, photophysics and electrophosphorescent applications of phosphorescent platinum cyclometalated complexes with 9-arylcarbazole moieties was written by Ho, Cheuk-Lam;Wong, Wai-Yeung;Yao, Bing;Xie, Zhiyuen;Wang, Lixiang;Lin, Zhenyang. And the article was included in Journal of Organometallic Chemistry in 2009.Product Details of 922721-30-0 The following contents are mentioned in the article:

Cyclometalating Pt(II) complexes with substituted 9-arylcarbazolyl chromophores were synthesized and characterized. These complexes are thermally stable and most of them were characterized by x-ray crystallog. The phosphorescence emissions of the complexes are dominated by ³MLCT excited states. The excited state properties of these complexes can be modulated by varying the electronic characteristics of the cyclometalating ligands via substituent effects, thus allowing the emission to be tuned from bright green to yellow, orange and red light. The correlation between the functional properties of these metallophosphors and the results of d. functional theory calculations was made. Because of the propensity of the electron-rich carbazolyl group to facilitate hole injection/transport, the presence of such moiety can increase the HOMO levels and improve the charge balance in the resulting complexes relative to the parent Pt(II) phosphor with 2-phenylpyridine ligand. The solution-processed electrophosphorescent organic light-emitting diodes doped with these Pt-based phosphors were fabricated which showed a maximum external quantum efficiency of 2.77% for the best device, corresponding to a power efficiency of 3.48 lm/W and a luminance efficiency of 8.49 cd/A. The present work enables the rational design of Pt-carbazolyl electrophosphors by synthetically tailoring the structure of carbazolylpyridine ring that can permit good color-tuning versatility suitable for multi-color display technol. This study involved multiple reactions and reactants, such as 3-Bromo-9-(4-fluorophenyl)-9H-carbazole (cas: 922721-30-0Product Details of 922721-30-0).

3-Bromo-9-(4-fluorophenyl)-9H-carbazole (cas: 922721-30-0) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Product Details of 922721-30-0

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

A High-Barrier Molecular Balance for Studying Face-to-Face Arene-Arene Interactions in the Solid State and in Solution was written by Chong, Yong S.;Carroll, William R.;Burns, William G.;Smith, Mark D.;Shimizu, Ken D.. And the article was included in Chemistry – A European Journal in 2009.Synthetic Route of C18H11BrO The following contents are mentioned in the article:

An atropisomeric mol. balance was developed to study face-to-face arene-arene interactions. The balance has a large central 1,4,5,8-naphthalenediimide surface that forms intramol. arene-arene interactions with two pendent arms. The balance adopts distinct syn and anti isomers with varying numbers of intramol. interactions. Thus, the strength of the arene-arene interaction could be quant. measured by NMR spectroscopy from the anti/syn ratios. The size of the arene arms was easily varied, which allowed examination of the relation between arene size and strength of the interaction. A nonlinear size dependence was observed in solution with larger arene arms having a disproportionately stronger arene-arene interaction. The intramol. arene-arene interactions were also characterized in the solid state by x-ray crystallog. These studies were facilitated by the kinetic stability of the syn and anti isomers at room temperature due to the high isomerization barrier (ΔG = 27.0 kcal mol^-1). Thus, the anti isomer could be selectively isolated and crystallized in its folded conformation. The x-ray structures confirmed that the anti isomers formed two strong intramol. arene-arene interactions with face-to-face geometries. The solid-state structure anal. also reveals that the rigid framework may contribute to the observed nonlinear size trend. The acetate linker is slightly too long, which selectively destabilizes the balances with smaller arene arms. The larger arene arms are able to compensate for the longer linker and form effective intramol. arene-arene interactions. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Synthetic Route of C18H11BrO).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.Synthetic Route of C18H11BrO

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Determination of dialkyl phosphates as breakdown products of organophosphorus insecticides in fruit juices by HPTLC with fluorescence detection was written by Schwack, Wolfgang;Zeisler, Tatjana;Stiefel, Constanze. And the article was included in Journal of AOAC International in 2009.Name: 2-Bromo-1-(pyren-1-yl)ethanone The following contents are mentioned in the article:

Dialkyl phosphates (DAP) are common degradation products of organophosphorus pesticides that are used as urinary biomarkers for human exposure. An HPTLC method was developed for the quant. determination of DAP in fruit juices, i.e., di-Me phosphate (DMP), di-Me thiophosphate (DMTP), di-Et phosphate (DEP), and di-Et thiophosphate (DETP). Di-Bu phosphate (DBP) was used as an internal standard The method was based on precipitation of fruit acids in the presence of barium chloride and acetonitrile and liquid-liquid extraction with acetonitrile-diethyl ether. Extracted DAP were derivatized with 1-(bromoacetyl)pyrene (BAP), and the BAP derivatives separated on HPTLC amino plates with dichloromethane as the mobile phase. Densitometry was performed by measurement of fluorescence at 366/>400 nm. The limit of quantification (LOQ) values were between 0.8 and 1.4 ng/zone. Fluorescence enhancement was achieved by dipping the plate into a paraffin oil solution, increasing the sensitivity and resulting in and LOQ of 0.5-0.6 ng/zone. Repeatabilities with relative standard deviations of ≤3.5% (n = 5, at 15-20 ng/zone) and coefficients of correlation of 0.9999 were highly satisfactory for rapid trace anal. of DAP in the fruit juices by HPTLC. The mean recoveries from apple juice spiked at 0.5 mg/L were 74, 83, 70, and 57% for DMP, DEP, DMTP, and DETP, resp. If an application volume of 5 μL of apple juice extract was applied, the LOQ in apple juice was 300 μg/L. However, this can be lowered by application of higher volumes (up to 50 μL) or a more concentrated derivatization batch. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Name: 2-Bromo-1-(pyren-1-yl)ethanone).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Most of the natural organobromine compounds are produced by marine organisms, and several brominated metabolites with antibacterial, antitumor, antiviral, and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Name: 2-Bromo-1-(pyren-1-yl)ethanone

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Association Behavior of 1-Pyrenyl Pendants Introduced into the Papain Active Site was written by Sakurai, Tadamitsu;Miyata, Kazue;Watanabe, Kenichiro;Kubo, Kanji;Inoue, Hiroyasu. And the article was included in Bulletin of the Chemical Society of Japan in 1999.Product Details of 80480-15-5 The following contents are mentioned in the article:

1-(Bromoacetyl)pyrene (BAP) was found to selectively alkylate the cysteine-25 residue (Cys-25) of papain, inactivating the enzyme. A comparison of the spectroscopic behavior of BAP-modified papain with that of the reference compound, 1-{[2-(acetylamino)ethylthio]acetyl}pyrene (TAP), showed that the pyrenecarbonylmethyl pendant (covalently bound to Cys-25 in a 1:1 stoichiometric ratio) gives a new absorption around 390 nm and a long-wavelength fluorescence at 465 nm, which are both characteristic of an associated dimer. Effects of solvent and concentration on the absorption and emission spectra of TAP as well as the derivatized enzyme substantiate the dimer formation in the ground state. The finding that the pendant-carbonyl-¹³C carbon signal undergoes a large upfield shift in the papain active site, as compared to the corresponding signal of ¹³C-labeled TAP, confirms that the pyrenecarbonyl moiety adopts an enolate-type resonance structure (making the pyrene ring electron-deficient) on formation of a strong hydrogen bond to the neighboring amino acid residue(s). It is proposed that the significant contribution of the enolate-type resonance structure is a driving force for promoting the dimerization of the pyrenecarbonylmethyl reporter group attached to Cys-25 mainly through dipole-dipole and hydrophobic interactions. On the other hand, the introduction of the imino spacer between the 1-pyrenyl carbon and the acetyl carbonyl carbon in BAP-derived pendant greatly weakened a tendency to produce a pendant dimer in the ground state, providing a piece of evidence in support of this proposal. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Product Details of 80480-15-5).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Organo bromine compounds are versatile compounds and are widely used in diverse fields. Organo bromine derivatives are used in the dye sector, as an indicator in analytical chemistry (Bromothymol blue is a popular indicator). The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. For many applications, organobromides represent a compromise of reactivity and cost.Product Details of 80480-15-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Water-Soluble Pyrene-Adorned Imidazolium Salts with Multicolor Solid-State Fluorescence: Synthesis, Structure, Photophysical Properties, and Application on the Detection of Latent Fingerprints was written by Nirmala, Muthukumaran;Vadivel, Ramanan;Chellappan, Selvaraju;Malecki, Jan Grzegorz;Ramamurthy, Perumal. And the article was included in ACS Omega in 2021.Formula: C18H11BrO The following contents are mentioned in the article:

New water-soluble acetylpyrene-bound imidazolium salts (1-N-methyl-3-(2-oxo-2-(pyren-1-yl)ethyl)-imidazolium bromide (1), 1-N-isopropyl-3-(2-oxo-2-(pyren-1-yl)ethyl)-imidazolium bromide (2), 1-N-allyl-3-(2-oxo-2-(pyren-1-yl)ethyl)-imidazolium bromide (3), and 1-N-isopropyl-3-(2-oxo-2-(pyren-1-yl)ethyl)-imidazolium hexafluorophosphate (4)) were synthesized from the reaction between 1-bromoacetylpyrene and N-substituted imidazoles in excellent yield. The new mols. were fully characterized by elemental anal., FT-IR, multinuclear (¹H, ¹³C, and ¹⁹F) NMR techniques, and single-crystal X-ray diffraction anal. Investigations on the crystal packing of 1, 3, and 4 show the presence of inter/intramol. weak interactions, including the π···π stacking interaction between the pairs of pyrene mols. The photophys. properties were investigated in detail for the four imidazolium salts. Experiments show that the emissions observed for all the four compounds are due to the excited monomer and static excimer. Very interestingly, all the four compounds exhibit solid-state multicolor fluorescence depending on the excitation wavelength. The solid-state emissions were monitored using a fluorescence microscope. Finally, a fingerprint powder was formulated based on compound 4 and demonstrated as an efficient fluorescent fingerprint powder for forensic applications. The formulated powder revealed all the 3 level information along with peculiar individual characteristics of the fingerprints under investigation. The fingerprints were further viewed through a fluorescence microscope, and the results were discussed in detail. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Formula: C18H11BrO).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Formula: C18H11BrO

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Determination of simvastatin and its active metabolite in human plasma by column-switching high-performance liquid chromatography with fluorescence detection after derivatization with 1-bromoacetylpyrene was written by Ochiai, Hisao;Uchiyama, Naotaka;Imagaki, Kazuhide;Hata, Shunsuke;Kamei, Toshio. And the article was included in Journal of Chromatography B: Biomedical Sciences and Applications in 1997.Application In Synthesis of 2-Bromo-1-(pyren-1-yl)ethanone The following contents are mentioned in the article:

By using a fluorescent derivatization and column-switching technique, a highly sensitive and selective high-performance liquid chromatog. (HPLC) method has been developed for the determination of simvastatin (I, β-hydroxy-δ-lactone form) and its active hydrolyzed metabolite (II, β,δ-dihydroxy acid form of I) in human plasma. A plasma sample spiked with internal standards was applied to a C₈ solid-phase extraction column. I and II were sep. extracted from internal standards was applied to a C₈ solid-phase extraction column. I and II were sep. extracted from plasma into two fractions. I in one of the fractions was hydrolyzed to II. A fluorescent derivative was prepared by esterification of II with 1-bromoacetylpyrene in the presence of 18-crown-6 for both fractions. The pyrenacyl ester of II thus obtained was purified on a phenylboronic acid (PBA) solid-phase extraction column, and was measured by column-switching HPLC with fluorescence detection. The calibration curves for both I and II were linear in the concentration range of 0.1-10 ng/mL. The intra-day coefficients of variation were less than 11.0%, and the accuracies were between 91.7% and 117% within the concentration range for both analytes. The limits of quantification (LOQ) for both analytes were set to 0.1 ng/mL. This assay method has adequate sensitivity and selectivity to measure the concentrations of I and II in human plasma from clin. studies. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Application In Synthesis of 2-Bromo-1-(pyren-1-yl)ethanone).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Application In Synthesis of 2-Bromo-1-(pyren-1-yl)ethanone

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary