- Rare case of a triple-stranded molecular braid in an organic cocrystal
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We describe the use of two "bent" molecules, tetrabromobisphenol- S (2) and 1,3-bis(4-pyridyl)-propane (3), to build an interesting organic cocrystal [(C6H2OHBr2)2SO 2]?[(C5H4N)2(CH 2)3]?MeOH (4). In the molecular structure of cocrystal 4, the cocrystallizing components (coformers) 2 and 3 assemble into a 1:1 supramolecular adduct featuring unprecedented triple-stranded molecular entanglement, called a "molecular braid", via O-H...N interactions, which is the first example of such one-dimensional entanglement in the realm of organic cocrystals.
- Lue, Jian,Han, Li-Wei,Lin, Jing-Xiang,Liu, Tian-Fu,Cao, Rong
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- Isolation and identification of tetrabromobisphenol-S-bis-(2,3-dibromopropyl ether) as flame retardant in polypropylene
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Approximately 4% tetrabromobisphenol-S-bis-(2,3-dibromopropyl ether) and 0.44% antimony were found in the back wall of a TV cabinet. This is the first time a bromoorganic name retardant containing a sulfur linkage has been detected. No such compound has been previously mentioned in the analytical or environmental literature. Isolation from PP was performed by extraction and precipitation of coextracted polymer. After chromatographic separation (TLC, CC), the combination of 1H/13C-NMR, MS (EI), FT-IR and HPLC (UV/Vis, DAD and MS) indicated the TBBP-S derivative, which was verified by synthesis of reference material.
- Dettmer,Wichmann,De Boer,Bahadir
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- Simple and sensitive synchronous- fluorescence method for the determination of trace bisphenol s based on its inhibitory effect on the fluorescence quenching reaction of rhodamine B
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An inhibitory kinetic fluorimetric method is reported for the determination of trace bisphenol S (BPS). The proposed method is based on the inhibitory effect of BPS on the fluorescence quenching of rhodamine B (RhB) caused by potassium bromate in a dilute phosphoric acid medium. Under the optimal conditions of the experiment, the detection limit for BPS was 0.021 mg/L, and the linear range of determination was from 0.035 mg/L to 0.750 mg/L. The relative standard deviations of 11 measurements for 0.20 mg/L and 0.40 mg/L BPS solutions were 2.74 % and 1.87 %, respectively. The method was successfully applied to the determination of bisphenol S derived from commercially available plastic film samples in hot water. A possible reaction mechanism of the inhibitory effect of BPS on the fluorescence quenching of RhB was proposed.
- Cao, Gui-Ping,Chen, Ting,Zhuang, Ya-Feng
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- Synthesis method of tetrabromobisphenol S
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The invention provides a synthesis method of tetrabromobisphenol S. The synthesis method comprises the following steps: (1) mixing bisphenol S, a mixed solvent of dichloromethane and isobutanol and water, uniformly stirring, slowly dropwise adding hydrogen peroxide and bromine at 10-30 DEG C, and heating to 35-40 DEG C for reaction after dropwise adding is finished; and (2) after the reaction is finished, cooling the reaction system to room temperature, adding a sodium sulfite solution to neutralize excessive bromine, then adjusting the pH value of the system to 6-7, filtering, washing and drying to obtain tetrabromobisphenol S, and directly recycling mother liquor obtained by filtering. The preparation method disclosed by the invention is low in cost, environment-friendly, high in productyield and purity and high in safety.
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Paragraph 0031-0059
(2020/05/08)
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- COLOR DEVELOPING COMPOSITION CONTAINING MOLECULAR COMPOUND, AND RECORDING MATERIAL
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Provided is a color-developing composition containing a molecular compound which has as a component compound a compound represented by formula (I) [wherein Y represents a C1-C12 hydrocarbon group which is chained or branched and saturated or unsaturated, or a C1-C8 hydrocarbon group which is chained or branched, saturated or unsaturated and has an ether or thioether bond; R1, R2, R3 and R4 each independently represent a C1-C6 alkyl group or C2-C6 alkenyl group; n, p, q and r each represents any integer of 0 to 4; and m represents any integer of 0 to 2]. Also provided is a recording material with a sufficient color-forming sensitivity, superior storage stability, and especially with an extremely little background fogging in a heat resistance test.
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- Organic complexes built by halogenated molecules: Unexpected in situ C-N bond formation in metal-free solvothermal conditions
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Reactions of two halogenated derivatives of bis(4-hydroxyphenyl)sulphone (BPS, 1), tetrabromobisphenol-S (TBBPS, 2), and tetrachlorobisphenol-S (TCBPS, 3), with piperazine (PZ, 4), were investigated by means of the combinational usage of solvothermal and mechanochemical methods. The resultant organic complexes, [(C6H2OBr2)2SO 2]?[(C4H10N2) 2CH2] (5), [(C6H2OBr 2)2SO2]2?(C4H 12N2)2?3(CH3OH) (6), [(C 6H2OCl2)2SO2] ?[(C4H10N2)2CH2] (7), and [(C6H2OCl2)2SO 2]2?(C4H12N2) 2?3(CH3OH) (8), were fully characterized by single crystal and powder X-ray diffractions. In the cases of complexes 5 and 7 that were prepared from solvothermal conditions, a rare metal-free in situ ligand formation has been observed, in which the new organic molecule 1,2-bispiperazinylmethane was presumably originated from the double C-N coupling of two piperazines on a carbon atom coming from methanol. In addition, the relevant concomitants 6 and 8 were also isolated from the solutions of 5 and 7, respectively. Complexes 6 and 8 contain 1:1 starting molecules of 2/3 with 4 assembled into helical structures.
- Lue, Jian,Han, Li-Wei,Lin, Jing-Xiang,Cao, Rong
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body text
p. 2035 - 2038
(2012/05/05)
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- Thermosensitive recording material and color developer compound therefor
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A thermosensitive recording material has a support and a thermosensitive coloring layer formed thereon containing a leuco dye and a color developer capable of inducing color formation in the leuco dye upon application of heat thereto, with the color developer including at least one compound (A) having in a molecule thereof at least two aromatic ring moieties with specific structures, selected from the group consisting of an aromatic ring moiety having at least one carboxyl group and electron-attracting functional group, an aromatic ring moiety having at least one carboxyl group and electron-donating functional group, and an aromatic ring moiety having at least one carboxyl group, free of the electron-attracting and electron-donating functional groups. An aromatic carboxylic acid compound serving as the above-mentioned compound (A) and the producing method thereof are also disclosed.
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- Phenolic compounds
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A phenolic compound having formula (I): STR1 wherein X represents a chlorine atom or a methyl group, and a recording material comprising a coloress or light-colored leuco dye and the above phenolic compound serving as a color developer for the leuco dye are disclosed.
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