Tag: 300-400

Enhancement of Light Absorption Ability of Synthetic Chlorophyll Derivatives by Conjugation with Difluoroboron Diketonate Group was written by Kinoshita, Yusuke;Kitagawa, Yuichi;Tamiaki, Hitoshi. And the article was included in Chemistry – A European Journal in 2016.COA of Formula: C18H11BrO The following contents are mentioned in the article:

The enhancement of the light absorption ability of synthetic chlorophyll derivatives is demonstrated. Chlorophyll derivatives directly conjugated with a difluoroboron 1,3-diketonate group at the C3 position were synthesized from Me pyropheophorbide-d through Barbier acylmethylation of the C3-formyl moiety, oxidation of the C3-carbinol, and difluoroboron complexation of the diketonate. Electronic absorption spectra in a diluted solution showed that the synthetic conjugates gave an absorption band at λ=400-500 nm, with a Qy band shifted to a longer wavelength of λ≈700 nm. DFT calculations demonstrated that the absorption bands and red shifts were ascribable to the coupling of the LUMO of chlorin with that of the difluoroboron diketonate moiety. The introduction of a pyrenyl group at the C3³-position of the conjugate afforded an addnl. charge-transfer band over λ=500 nm, producing a pigment that bridged the green gap in standard chlorophylls. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5COA of Formula: 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. Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.COA of Formula: C18H11BrO

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Nanomolar Level Detection of Uric Acid in Blood Serum and Pest-Infested Grain Samples by an Amphiphilic Probe was written by Dey, Nilanjan;Bhattacharya, Santanu. And the article was included in Analytical Chemistry (Washington, DC, United States) in 2017.Formula: C18H11BrO The following contents are mentioned in the article:

A pyrene-based amphiphilic receptor has been utilized in the nanomolar detection of uric acid at physiol. pH in water. The compound shows a unique concentration-dependent modulation in optical response towards uric acid. In intramol./static excimer form (low concentration range), it displays ratiometric response, while a ‘turn-off’ sensing is observed specifically in the presence of intermol./dynamic excimer (high concentration range). The present protocol is then employed for the estimation of uric acid in blood serum samples of healthy individuals. Bland-Altman anal. in comparison to clin. approved uricase assay indicated the high accuracy of the present method. Addnl., the extent of insect infestation in storage-old grain samples was determined by measuring the uric acid content of their aqueous extracts Low-cost color strips were developed for on-site detection of uric acid without involving any sophisticated instrument or trained personnel. 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. 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. One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine.Formula: C18H11BrO

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Relationship between crystal shape and unit cell shape: crystal shape modification via co-crystallization toward SXRD-suitable crystals was written by Okayasu, Misaki;Kikkawa, Shoko;Hikawa, Hidemasa;Azumaya, Isao. And the article was included in CrystEngComm in 2021.COA of Formula: C12H9Br2NO2S The following contents are mentioned in the article:

The crystal shape was related to the unit cell shape and that a mol. arrangement was altered as desired by employing co-crystallization was demonstrated. The relationship between the crystal shape, unit cell parameters, and intermol. interactions using 131 crystals of secondary aromatic sulfonamides was investigated . The crystal shape was evaluated based on the unit cell length ratio (M/S, L/S) (L, M, S = the longest, mid-length, and shortest cell lengths, resp.), and was considered block-like if the ratio was close to (1, 1) and needle-like if it was not. Furthermore, when the sulfonamides that yielded needle-like crystals were co-crystallized with 4,4′-dipyridyl (dpy), the (M/S, L/S) ratio of the obtained co-crystals was close to (1, 1); i.e., the co-crystals were more block-like than the crystals of the original compound Thus, co-crystallization is useful for obtaining block-like crystals suitable for single-crystal X-ray diffraction (SXRD). This study involved multiple reactions and reactants, such as 4-Bromo-N-(3-bromophenyl)benzenesulfonamide (cas: 349404-99-5COA of Formula: C12H9Br2NO2S).

4-Bromo-N-(3-bromophenyl)benzenesulfonamide (cas: 349404-99-5) 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. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.COA of Formula: C12H9Br2NO2S

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Water-Soluble Full-Length Single-Wall Carbon Nanotube Polyelectrolytes: Preparation and Characterization was written by Paloniemi, Hanna;Aeaeritalo, Timo;Laiho, Taina;Liuke, Hanna;Kocharova, Natalia;Haapakka, Keijo;Terzi, Fabio;Seeber, Renato;Lukkari, Jukka. And the article was included in Journal of Physical Chemistry B in 2005.SDS of cas: 80480-15-5 The following contents are mentioned in the article:

HiPco single-wall C nanotubes (SWNTs) were noncovalently modified with ionic pyrene and naphthalene derivatives to prepare H₂O-soluble SWNT polyelectrolytes (SWNT-PEs), which are analogous to polyanions and polycations. The modified nanotubes were characterized with UV-visible-NIR, fluorescence, Raman and XPS, and TEM. The nanotube-adsorbate interactions consist of π-π stacking interactions between the aromatic core of the adsorbate and the nanotube surface and specific contributions because of the substituents. The interaction between nanotubes and adsorbates also involves charge transfer from adsorbates to SWNTs, and with naphthalene sulfonates the role of a free amino group was important. The ionic surface charge d. of the modified SWNTs is constant and probably controlled by electrostatic repulsion between like charges. The linear ionic charge d. of the modified SWNTs is similar to that of common highly charged polyelectrolytes. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5SDS of cas: 80480-15-5).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) 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. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine.SDS of cas: 80480-15-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Isolation of dinophysistoxin-2 and the high-performance liquid chromatographic analysis of diarrhetic shellfish toxins using derivatization with 1-bromoacetylpyrene was written by Kelly, Sean S.;Bishop, Alan G.;Carmody, Eoin P.;James, Kevin J.. And the article was included in Journal of Chromatography A in 1996.Product Details of 80480-15-5 The following contents are mentioned in the article:

The rare diarrhetic shellfish toxin, dinophysistoxin-2 (DTX-2), was isolated from the digestive glands of mussels (Mytilus edulis). This was achieved by chromatog. on silica and Sephadex LH-20 followed by reversed-phase solid phase extraction and semi-preparative high-performance liquid chromatog. (HPLC) with an Ultremex C₁₈ column. Using 1-bromoacetylpyrene (BAP), as a precolumn derivatization reagent, the diarrhetic shellfish toxins, okadaic acid (OA), dinophysistoxin-1 (DTX-1) and DTX-2, were determined by HPLC with fluorimetric detection. Derivatization using BAP was compared with 9-anthryldiazomethane (ADAM) and, although the latter exhibited a four-fold better sensitivity, the BAP method gave fewer artifact peaks from reagent decomposition The limits of detection of OA and DTX-2 were 0.4 ng on-column using BAP, which permits this method to be used for the regulatory control of these toxins in shellfish. 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. 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.Product Details of 80480-15-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Rapid Identification of Bacteria by Membrane-Responsive Aggregation of a Pyrene Derivative was written by Long, Shuangshuang;Miao, Lu;Li, Ruihua;Deng, Fei;Qiao, Qinglong;Liu, Xiaogang;Yan, Aixin;Xu, Zhaochao. And the article was included in ACS Sensors in 2019.Application of 80480-15-5 The following contents are mentioned in the article:

An imidazolium-derived pyrene aggregation was developed to rapidly identify and quantify different bacteria species. When the nonemissive aggregates bound to the anionic bacteria surface, the sensor disassembled to turn on significant fluorescence. At the same time, ratiometric signals between pyrene monomer and excimer emission were controlled by different interactions with various bacteria surfaces. The resulted different fluorescent emission profiles then were obtained as fingerprints for various bacterial species. By converting emission profiles directly into output signals of two channels, fluorescence increase and ratiometric change, a two-dimensional anal. map was generated for bacteria identification. The authors demonstrated that the sensor rapidly identified 10 species of bacteria and 14 clin. isolated multidrug-resistant bacteria, and the authors determined their staining properties (Gram-pos. or Gram-neg.). This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Application of 80480-15-5).

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. 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 of 80480-15-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Noncovalent functionalization of graphene with pyrene-terminated liquid crystalline polymer was written by Ji, Liangliang;Wu, Yanhong;Ma, Lijun;Yang, Xiaoming. And the article was included in Composites, Part A: Applied Science and Manufacturing in 2015.COA of Formula: C18H11BrO The following contents are mentioned in the article:

Pyrene-terminated liquid crystalline polymers, poly[8-(4-cyano-4′-biphenyl)-1-octanoylacrylate] and poly[6-(4-cyano-4′-biphenyl)-1-hexanoylacrylate] were synthesized and used to functionalize graphene sheets via π-π interactions. The resulting liquid crystalline polymers functionalized graphene sheets were characterized by UV-vis spectroscopy, fluorescence spectroscopy, thermal gravimetric anal., Fourier transform IR spectroscopy, X-ray diffraction, at. force microscopy and Raman spectroscopy. It was found that an intercalated layer structure was formed when polymer was grafted onto graphene sheets. The liquid crystalline polymers were able to effectively disperse graphene in N,N-dimethylformamide that were stable for months. Addnl., a remarkable smaller distance of adjacent mesogenic units was observed, which is attributed to the confinement of the polymer chains between 2D reduced graphene oxide sheets. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5COA of Formula: C18H11BrO).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) 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. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. Commercially available organobromine pharmaceuticals include the vasodilator nicergoline, the sedative brotizolam, the anticancer agent pipobroman, and the antiseptic merbromin. COA of Formula: C18H11BrO

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Visible-Light-Induced Passerini Multicomponent Polymerization was written by Tuten, Bryan T.;De Keer, Lies;Wiedbrauk, Sandra;Van Steenberge, Paul H. M.;D’hooge, Dagmar R.;Barner-Kowollik, Christopher. And the article was included in Angewandte Chemie, International Edition in 2019.HPLC of Formula: 80480-15-5 The following contents are mentioned in the article:

Herein, we introduce an additive-free visible-light-induced Passerini multicomponent polymerization (MCP) for the generation of high molar mass chains. In place of classical aldehydes (or ketones), highly reactive, in situ photogenerated thioaldehydes are exploited along with isocyanides and carboxylic acids. Prone to side reactions, the thioaldehyde moieties create a complex reaction environment which can be tamed by optimizing the synthetic conditions utilizing stochastic reaction path anal., highlighting the potential of semi-batch procedures. Once the complex MCP environment is understood, step-growth polymers can be synthesized under mild reaction conditions which-after a Mumm rearrangement-result in the incorporation of thioester moieties directly into the polymer backbone, leading to soft matter materials that can be degraded by straightforward aminolysis or chain expanded by thiirane insertion. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5HPLC of Formula: 80480-15-5).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) 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.HPLC of Formula: 80480-15-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

1-(Hydroxyacetyl)pyrene a new fluorescent phototrigger for cell imaging and caging of alcohols, phenol and adenosine was written by Jana, Avijit;Saha, Biswajit;Ikbal, Mohammed;Ghosh, Sudip Kumar;Singh, N. D. Pradeep. And the article was included in Photochemical & Photobiological Sciences in 2012.Application of 80480-15-5 The following contents are mentioned in the article:

1-(Hydroxyacetyl)pyrene has been introduced as a new fluorescent phototrigger for alcs. and phenols. Alcs. and phenols were protected as their corresponding carbonate esters by coupling with fluorescent phototrigger, 1-(hydroxyacetyl)pyrene. Photophys. studies of caged carbonates showed that they all exhibited strong fluorescence properties. Irradiation of the caged carbonates by visible light (≥410 nm) in aqueous acetonitrile released the corresponding alcs. or phenols in high chem. (95-97%) and quantum (0.17-0.21) yields. The mechanism for the photorelease was proposed based on Stern-Volmer quenching experiments and solvent effect studies. Importantly, 1-(hydroxyacetyl)pyrene showed as a phototrigger for rapid photorelease of the biol. active mol. adenosine. In vitro biol. studies revealed that 1-(hydroxyacetyl)pyrene has good biocompatibility, cellular uptake property and cell imaging ability. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Application of 80480-15-5).

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. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.Application of 80480-15-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Synthesis of asymmetric biphenyl derivatives for optoelectronic applications was written by Zhu, Cai-Cai;Guo, Kun-Ping;Liu, Wang-Bo;He, Yan-Bo;Li, Zhi-Mei;Gao, Xi-Cun;Deng, Feng-Jie;Wei, Bin. And the article was included in Optical Materials (Amsterdam, Netherlands) in 2013.Synthetic Route of C18H11BrFN The following contents are mentioned in the article:

We report the synthesis and optical properties of a series of ten organic compounds with biphenyl as the backbone and asym. modified by triphenylamines, carbazoles and tetraphenylsilanes (BP 1-10). BP 1-10 were synthesized mainly by Ullmann coupling reaction and Suzuki cross-coupling reaction and characterized by EA, NMR, MS, UV-Vis, DSC, TGA, fluorescence spectra and cyclic voltammetry. They exhibit reversible electrochem. behavior with low oxidation potentials and emit intense pure-blue light with high fluorescence quantum yields (up to 80%). BP 1 was fabricated into multi-layered light-emitting diodes as blue-emitting, host and hole transport materials. Based on the performance of BP 1 and the similarity in chem. structure to those compounds reported in literature, these compounds are expected to be good and versatile hole transport, host and blue emitting materials. This study involved multiple reactions and reactants, such as 3-Bromo-9-(4-fluorophenyl)-9H-carbazole (cas: 922721-30-0Synthetic Route of C18H11BrFN).

3-Bromo-9-(4-fluorophenyl)-9H-carbazole (cas: 922721-30-0) 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). Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.Synthetic Route of C18H11BrFN

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary