Category: 41819-13-0

On December 31, 2012, Zhang, Liangliang; Guo, Jie; Meng, Qingguo; Pang, Haiduo; Chen, Zhen; Sun, Daofeng published an article.Formula: C10H4Br2O8 The title of the article was Two novel isostructural Ln(III) 3D frameworks supported by 3,6-dibromobenzene-1,2,4,5-tetracarboxylic acid and in situ generated oxalate: Syntheses, characterization and photoluminescent property. And the article contained the following:

Two isostructural lanthanide complexes, [Ln(dbtec)0.5(ox)0.5·3H2O]n, [Ln = Dy (1), Yb (2)] (H4dbtec = 3,6-dibromobenzene-1,2,4,5-tetracarboxylic acid; H2ox = oxalic acid), were synthesized under the hydrothermal method and characterized by single-crystal x-ray diffraction, X-ray powder diffraction (PXRD), TGA and elemental anal. (EA) and IR spectra. Complexes 1 and 2 present a 2-nodal (4,6)-connected 3-dimensional fsc network. The 13C NMR of H4dbtec indicates ox in 1 and 2 is generated by the in situ decomposition of H4dbtec. Addnl., the photoluminescent properties of 1 and 2 are also discussed. The experimental process involved the reaction of 3,6-Dibromobenzene-1,2,4,5-tetracarboxylic acid(cas: 41819-13-0).Formula: C10H4Br2O8

The Article related to lanthanide bromobenzenetetracarboxylate oxalate 3d framework complex hydrothermal preparation, crystal structure lanthanide bromobenzenetetracarboxylate oxalate 3d framework complex, luminescence lanthanide bromobenzenetetracarboxylate oxalate 3d framework complex and other aspects.Formula: C10H4Br2O8

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Yagupol’skii, L. M.; Burmakov, A. I.; Alekseeva, L. A.; Kunshenko, B. V. published an article in 1973, the title of the article was Fluorination of aromatic carboxylic acids by sulfur tetrafluoride. VIII. Fluorination of spatially hindered aromatic carboxylic acids.HPLC of Formula: 41819-13-0 And the article contains the following content:

Fluorination of benzenetricarboxylic acid (I; R = R1 = R2 = CO2H) by SF4 gave 76% fluoride (I; R = R2 = CF3, R1 = COF) which was hydrolyzed to yield 73% acid (I; R = R2 = CF3, R1 = CO2H). The latter was decarboxylated by heat to give 67% (I; R = R2 = CF3, R1 = H). Analogous fluorination of benzenetetracarboxylic acid (II) gave 84% benzodifuran (III; R = Br). Naphthopyran (IV) was obtained in 63% yield from naphthalic acid. Treatment of mellitic acid by SF4 gave 65% III (R = CF3) and 55% benzotrifuran (V) was obtained by fluorination of the corresponding perchlorobenzotrifuran. The experimental process involved the reaction of 3,6-Dibromobenzene-1,2,4,5-tetracarboxylic acid(cas: 41819-13-0).HPLC of Formula: 41819-13-0

The Article related to fluorination acid sulfur tetrafluoride, benzotrifuran perfluoro, benzodifuran perfluoro, Heterocyclic Compounds (More Than One Hetero Atom): Fused-Ring Systems With Two Or More Hetero Atoms, No More Than One Hetero Atom Per Ring and other aspects.HPLC of Formula: 41819-13-0

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

On June 6, 2008, Kato, Shin-ichiro; Nonaka, Yasuhiro; Shimasaki, Toshiaki; Goto, Kenta; Shinmyozu, Teruo published an article.COA of Formula: C10H4Br2O8 The title of the article was Novel Pyromellitic Diimide-Based Macrocycle with a Linear π-Electronic System and Bis(phenylethynyl)pyromellitic Diimide: Syntheses, Structures, Photophysical Properties, and Redox Characteristics. And the article contained the following:

We report the syntheses, structures, photophys. properties, and redox characteristics of the [2+2] pyromellitic diimide-based macrocycle with a linear π-electronic system 2 as well as the 3,6-bis(phenylethynyl)pyromellitic diimide derivative 3. The interesting solid state structural properties of the clathrates of 3 with π-donors are also reported. The macrocycle 2 was synthesized by the direct cyclocondensation followed by the Sonogashira coupling reaction. X-ray crystallog. studies showed that the phenylacetylene moieties in 2 formed the intramol. benzene dimer structures, and the bis(phenylethynyl)pyromellitic diimide moieties in both 2 and 3 were stacked in a parallel and slanted arrangement. Theor. calculations for 2′ and 3 suggested the existence of electrostatic interactions between the bis(phenylethynyl)pyromellitic diimide moieties. The UV/vis spectral measurements and TDDFT calculations of 2, 2′, and/or 3 were performed to understand their electronic transitions. The fluorescence spectral measurements showed that 2 and 3 have visible fluorescence properties and 2 displays an excimer fluorescence at ca. 590 nm. The cyclic voltammetry measurements revealed that the electrostatic repulsion between the diimide moieties in 2 is greater than that in 1 according to the extension of the π-electronic systems. X-ray crystallog. of the clathrates of 3 with various π-donors demonstrated the formation of the segregated donor-acceptor structures, indicating the strong aggregation ability of the bis(phenylethynyl)pyromellitic diimide moiety. The experimental process involved the reaction of 3,6-Dibromobenzene-1,2,4,5-tetracarboxylic acid(cas: 41819-13-0).COA of Formula: C10H4Br2O8

The Article related to pyromellitic diimide based macrocycle preparation crystallog photophysics, Physical Organic Chemistry: Stereochemistry and Stereochemical Relationships, Including Conformational Inversions and Rotational Isomerization and other aspects.COA of Formula: C10H4Br2O8

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

On September 7, 2018, Stahl, Shannon S.; Gerken, James B.; Anson, Colin W.; Suh, Sung-Eun; Stamoulis, Alexiouis G. published a patent.Product Details of 41819-13-0 The title of the patent was Preparation of hydroquinones, anthraquinones and related compounds as high-and low-potential, water-soluble, robust quinones. And the patent contained the following:

Preparation of substituted hydroquinones, 1,4-quinones, catechols, 1,2-quinones, anthraquinones, and anthrahydroquinones od the exemplary formula I are disclosed herein. Compounds I wherein one or more of R1, R2, R3 and R4 include a sulfonate moiety, a sulfonimide moiety, or a phosphonate moiety, and any of R1, R2, R3 and R4 that do not include one of these moieties include an alkyl, a cycloalkyl, a thioether, a sulfoxide, a sulfone, a haloalkyl, a halogen, a nitrile, an imide, a pyrazole, or combinations thereof, are claimed. The substituted hydroquinones and catechols have the formula: while the substituted 1,4-quinones or 1,2-have the corresponding oxidized structure (1,4- benzoquinones and 1,2-benzoquinones). The substituted anthraquinones have the formula: while the substituted anthrahydroquinones have the corresponding reduced structure. Accordingly, they can be used as redox mediators in emerging technologies, such as in mediated fuel cells or organic-mediator flow batteries. The experimental process involved the reaction of 3,6-Dibromobenzene-1,2,4,5-tetracarboxylic acid(cas: 41819-13-0).Product Details of 41819-13-0

The Article related to hydroquinone anthraquinone preparation redox potential electrolyte fuel cell technol, Benzene, Its Derivatives, and Condensed Benzenoid Compounds: Phenols, Thiophenols, and Derivatives Including Phenol and Thiophenol Ethers and Esters and other aspects.Product Details of 41819-13-0

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

On November 30, 1989, Porwisiak, Jacek; Dmowski, Wojciech published an article.Related Products of 41819-13-0 The title of the article was An improved synthesis of dihalopyromellitic acids. And the article contained the following:

Durene (I, R = H) is halogenated to give I (R = Cl, Br), followed by oxidation with HNO3 and a catalytic amount of NH4VO3 to obtain a mixture of polycarboxylic acids. Subsequent oxidation with KMnO4 gives the title compounds II (R = Cl, Br) in 50-52% yield. The experimental process involved the reaction of 3,6-Dibromobenzene-1,2,4,5-tetracarboxylic acid(cas: 41819-13-0).Related Products of 41819-13-0

The Article related to chloropyromellitic acid, bromopyromellitic acid, halopyromellitic acid, oxidation halodurene, durene chlorination bromination, Benzene, Its Derivatives, and Condensed Benzenoid Compounds: Carboxylic Acids and Peroxycarboxylic Acids and Their Sulfur-Containing Analogs and Salts and other aspects.Related Products of 41819-13-0

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

On October 7, 2015, Myung, Beom Yeong; Yoon, Tae Ho published a patent.Application of 41819-13-0 The title of the patent was Method for the preparation of fluorinated pyromellitic dianhydride. And the patent contained the following:

Disclosed is a preparation method of I, characterized by (1) bromination of pyromellitic dianhydride to obtain II (2) successive reaction of Q1-Br with magnesium and trimethylborate followed by hydrolysis to obtain Q1-B(OH)2 (3) treatment of II with Q1-B(OH)2 in the presence of a catalyst (4) sublimation of the resulting compound III under reduced pressure [R1, R2 = independently H or Q1; with a proviso that R1 and R2 cannot be H simultaneously; R3, R4 = independently fluorinated alkyl; A1, A2 = independently H or Br]. For example, bromination of pyromellitic dianhydride [dissolving in 33% aqueous NaOH → Br2 (addition over a period of 1 h), 90%], coupling reaction with 3,5-bis(trifluoromethyl)phenylboronic acid (preparation given) [Pd(PPh3)4, 2 N Na2CO3, toluene, 98°, 48 h, 72%] and cyclocondensation [drying (250°, 30 inHg vacuum pressure, 12 h) → sublimation (290°, 30 inHg vacuum pressure)] afforded compound I [R1 = R2 = 3,5-bis(trifluoromethyl)phenyl] (70% yield). Compound I is useful for the production of polyimide having low permittivity and high heat-resistance. The experimental process involved the reaction of 3,6-Dibromobenzene-1,2,4,5-tetracarboxylic acid(cas: 41819-13-0).Application of 41819-13-0

The Article related to fluoroalkylphenyl pyromellitic dianhydride preparation polyimide intermediate, grignard reaction borylation hydrolysis, bromination coupling reaction cyclocondensation sublimation and other aspects.Application of 41819-13-0

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

On February 15, 2017, Du, Shunfu; Ji, Chunqing; Xin, Xuelian; Zhuang, Mu; Yu, Xuying; Lu, Jitao; Lu, Yukun; Sun, Daofeng published an article.Synthetic Route of 41819-13-0 The title of the article was Syntheses, structures and characteristics of four alkaline-earth metal-organic frameworks (MOFs) based on benzene-1,2,4,5-tetracarboxylic acid and its derivative ligand. And the article contained the following:

Two new pillar-layered Ba(II)-based 3D frameworks and two new Ca(II)-based 3D supramol. frameworks, [Ba2(dbtec)(H2O)2]n (1), [Ca2(dbtec)(H2O)8]n (2), {[Ba2(H2btec)·H2O]·0.5H2O}n (3) and [Ca(H2btec)·H2O]n (4) (H4dbtec = 3,6-dibromobenzene-1,2,4,5-tetracarboxylic acid; H4btec = benzene-1,2,4,5-tetracarboxylic acid), were synthesized under similar reaction conditions and stoichiometry. Single crystal x-ray diffraction study reveals axial-orientation Br···π supramol. interactions exist in the crystal structure of 1, which keeps an 3D binodal network with the (32.412.510.62.72)(32.46.56.6)2 topol. Whereas in 2, intramol. and intermol. H-bonding interactions with the ligated water mols. promote the formation of 3D supramol. frameworks network. For 3, a new 3D 3-nodal network occurs in the structure and some rare coordination modes for the H4btec are observed There is a 2D double layer with the thickness of 7.60 Å in 4. In addition, besides the high thermal stability, the FTIR spectra, PXRD patterns and the photoluminescent of these compounds are also discussed. The experimental process involved the reaction of 3,6-Dibromobenzene-1,2,4,5-tetracarboxylic acid(cas: 41819-13-0).Synthetic Route of 41819-13-0

The Article related to preparation crystal structure calcium barium dibromobenzenetetracarboxylate benzenetetracarboxylate mof, luminescence thermal stability calcium barium dibromobenzenetetracarboxylate benzenetetracarboxylate mof and other aspects.Synthetic Route of 41819-13-0

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

On April 24, 2013, Zhang, Liang-Liang; Guo, Yu; Wei, Yan-Hui; Guo, Jie; Wang, Xing-Po; Sun, Dao-Feng published an article.Recommanded Product: 41819-13-0 The title of the article was Crystal structure and temperature-dependent fluorescent property of a 2D cadmium (II) complex based on 3,6-dibromobenzene-1,2,4,5-tetracarboxylic acid. And the article contained the following:

A new Cd (II) organic coordination polymers [Cd(dbtec)0.5(H2O)3]·H2O (1), was constructed based on 3,6-dibromobenzene-1,2,4,5-tetracarboxylic acid (H4dbtec), and characterized by elemental anal. (EA), IR spectroscopy (IR), powder x-ray diffraction (PXRD), and single crystal X-ray diffraction. In 1, μ2-η1:η1 and μ4-η2:η2 dbtec ligands link four heptacoordinated CdII ions to form a 2-dimensional 44 topol. layer structure, which is further connected into an interesting 3-dimensional network by H bond and Br···O halogen bond. Also, the thermal stabilities, solid UV spectroscopy and temperature-dependent fluorescent properties of 1 were studied. The experimental process involved the reaction of 3,6-Dibromobenzene-1,2,4,5-tetracarboxylic acid(cas: 41819-13-0).Recommanded Product: 41819-13-0

The Article related to preparation cadmium bromobenzenetetracarboxylate coordination polymer, crystal structure cadmium bromobenzenetetracarboxylate coordination polymer, fluorescence cadmium bromobenzenetetracarboxylate coordination polymer and other aspects.Recommanded Product: 41819-13-0

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

On December 31, 2012, Zhang, Liangliang; Guo, Jie; Meng, Qingguo; Pang, Haiduo; Chen, Zhen; Sun, Daofeng published an article.Formula: C10H4Br2O8 The title of the article was Two novel isostructural Ln(III) 3D frameworks supported by 3,6-dibromobenzene-1,2,4,5-tetracarboxylic acid and in situ generated oxalate: Syntheses, characterization and photoluminescent property. And the article contained the following:

Two isostructural lanthanide complexes, [Ln(dbtec)0.5(ox)0.5·3H2O]n, [Ln = Dy (1), Yb (2)] (H4dbtec = 3,6-dibromobenzene-1,2,4,5-tetracarboxylic acid; H2ox = oxalic acid), were synthesized under the hydrothermal method and characterized by single-crystal x-ray diffraction, X-ray powder diffraction (PXRD), TGA and elemental anal. (EA) and IR spectra. Complexes 1 and 2 present a 2-nodal (4,6)-connected 3-dimensional fsc network. The 13C NMR of H4dbtec indicates ox in 1 and 2 is generated by the in situ decomposition of H4dbtec. Addnl., the photoluminescent properties of 1 and 2 are also discussed. The experimental process involved the reaction of 3,6-Dibromobenzene-1,2,4,5-tetracarboxylic acid(cas: 41819-13-0).Formula: C10H4Br2O8

The Article related to lanthanide bromobenzenetetracarboxylate oxalate 3d framework complex hydrothermal preparation, crystal structure lanthanide bromobenzenetetracarboxylate oxalate 3d framework complex, luminescence lanthanide bromobenzenetetracarboxylate oxalate 3d framework complex and other aspects.Formula: C10H4Br2O8

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary