- Two new isomerous fluorescent chemosensors for Al3+ based on photoinduced electron transfer
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Two new isomerous PET fluorescent chemosensors (L and L') for Al 3+ have been designed, synthesized and characterized. The two chemosensors exhibited fluorescence enhancement upon binding Al3+ in CH3-CN by PET inhibition processes from both the sulfur and the nitrogen donors to anthracene. The job's plot, Benesi-Hildebrand plot and 1H NMR titration experiments indicate that both chemosensors form a 1: 1 complex with Al3+. The binding constants were calculated to be (1.432 ±0.186) × 105 and (1.427 ± 0.970) × 105, respectively. Furthermore, the lowest detection limit for Al3+ in CH3CN was determined to be 4.8 × 10 7 M and 2.2 × 10 7 M, respectively.
- Jiang, Xiu-Juan,Tang, Hao,Li, Xiao-Yuan,Zang, Shuang-Quan,Hou, Hong-Wei,Mak, Thomas C.W.
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- NOVEL COMPOUND AND ORGANIC LIGHT EMITTING DEVICE COMPRISING THE SAME
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The present invention relates to a novel compound capable of improving efficiency and low driving voltage and/or lifespan characteristics in an organic light emitting device; and an organic light emitting device including the same. The compound is represe
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Paragraph 0419-0422
(2019/10/29)
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- Isoindol - 1, 3 - dione compound and its preparation method and application (by machine translation)
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The invention discloses a isoindole - 1, 3 - dione compound and its preparation method and application. The general formula (I) has the structure shown. The invention of the isoindole - 1, 3 - diones to LNCap cells with cell inhibitory activity, can be used for preparing anti-tumor drug. (by machine translation)
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- Photophysical properties of ESIPT inspired fluorescent 2-(2-hydroxyphenyl)- 6-methylimidazo[4,5-f]isoindole-5,7(1H,6H)-dione and its derivative: Experimental and DFT based approach
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The excited-state intramolecular proton transfer chromophores 2-(2-hydroxyphenyl)-6-methylimidazo[4,5-f]isoindole-5,7(1H,6H)-dione and 2-(4-(diethylamino)-2-hydroxyphenyl)-6-methylimidazo[4,5-f]isoindole-5,7(1H,6H) -dione are synthesized from 4,5-diamino-
- Deshmukh, Mininath S.,Sekar, Nagaiyan
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p. 457 - 465
(2014/12/11)
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- PREPARATION OF SUBSTITUTED PHTHALIC ANHYDRIDE, ESPECIALLY 4-CHLOROPHTALIC ANHYDRIDE
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A method for the synthesis of substituted phthalic anhydrides (IV) wherein R' is a halogen, aromatic or aliphatic group comprising 1-18 carbons, hydrogen or nitro group is the transimidation between a substituted N-alkyl phthalimide (V) wherein R is an alkyl having from 1 to 18 carbons, and a substituted tetrahydrophthalic anhydride (VI): The by product of this reaction, a substituted N-alkyl tetrahydrophthalimide (VII), may be converted by aromatization to the substituted N-alkyl phthalimide (V).
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- Methods for the preparation of 4-chlorophthalic anhydride
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A method for the synthesis of substituted phthalic anhydrides (IV)wherein R' is a halogen, aromatic or aliphatic group comprising 1-18 carbons, hydrogen or nitro group is the transimidation between a substituted N-alkyl phthalimide (V)wherein R is an alkyl having from 1 to 18 carbons, and a substituted tetrahydrophthalic anhydride (VI):The by-product of this reaction, a substituted N-alkyl tetrahydrophthalimide (VII), may be converted by aromatization to the substituted N-alkyl phthalimide (V).
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- On the Reaction of α-Chlorobenzylic Cations with Isocyanates
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Isocyanates react as N-nucleophiles with α-chlorobenzylic cations (2) to give 1-oxoisoindolium salts (5).From the reaction of benzotrichlorides with SbCl5 and isocyanates the extremely reactive hexachloroantimonates 5 with R2=Cl are isolated.Hydrolysis of these cyclic N-acyl iminium salts affords phthalimides 6.Reaction of 5k with dimethylcyanamide gives the 2-azoniaallene salt 13. p-Tolyl isocyanate is Friedel-Crafts alkylated by p-chlorobenzotrichloride (1i) in the presence of SbCl5 to furnish the 1,3-oxadiazonium salt 7, which is hydrolyzed to give the benzophenone 9.With ethanol the acetals 10 and 11 are formed from 7.
- Ismail, A. El-Hamid,Hamed, A.,Abdel-Aal, M. Taha,Zeid, I.,Al-Talib, M.,et al.
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p. 661 - 668
(2007/10/02)
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