反相液相色谱质谱法分离鉴定3,4,6,7,9,10-6H-3,3,6,6-四甲基-9-对硝基苯基吖啶-1,8二酮

应用反相高效液相色谱法，分离和鉴定3，4，6，7，9，10－6H－3，3，6，6－四甲基－9－对硝基苯基吖啶－1，8－二酮（化合物Ⅰ），分离系统包括Zorbax SB C18及苯基柱，紫外检测器检测波长为285nm，等比和线性梯度淋洗，液相色谱－质谱联用和光导二极和列检测系统被用来鉴定主要化合物及其它杂质，此方法可达到分离效果好，灵敏度高。     

Colorimetric and fluorometric chemosensors for selective signaling toward Ca and Mg by aza-crown ether acridinedione-functionalized gold nanoparticles

The aza-crown ether acridinedione-functionalized gold nanoparticles (ACEADD-GNPs) 6 have been synthesized and investigated as a fluorescent chemosensor for metal ions. A blue shift along with an intensity enhancement of emission and color change are observed in the presence of both Ca²⁺ and Mg²⁺ ions. The enhanced fluorescence intensity is attributed to the photoinduced electron transfer (PET) suppression through space and color change of the suspension from red to blue due to shifted surface plasmon resonance (SPR) with aggregation of nanoparticles by the sandwich complexation.     

3,6-二甲基-9-芳基-2,7-二氧杂-1,2,7,8,9,10-六氢-1,8-吖啶二酮衍生物的一步合成

以芳醛、6-甲基-4-羟基-2-吡喃酮、醋酸铵为原料, 醋酸为溶剂, 一步合成了一系列3,6-二甲基-9-芳基-2,7-二氧 杂-1,2,7,8,9,10-六氢-1,8-吖啶二酮, 产物的结构经红外、核磁、元素分析进行了表征, 并对反应过程提出了可能的机理.     

水相回流条件下N-取代吖啶二酮衍生物的合成

在水相回流条件下,以芳香醛、5,5-二甲基-1,3-环己二酮（达米酮）和苯胺/对甲苯胺为原料,经过多组分一锅反应,合成了一系列N-取代吖啶二酮衍生物,收率在69%~90%之间。 该过程以水作为溶剂,无有机溶剂污染,而且操作简单,后处理方便。     

Excited-state behavior and photoionization of 1,8-acridinedione dyes in micelles--comparison with NADH oxidation

The photophysics and photochemistry of 1,8-acridinedione dyes, which are analogues of reduced nicotinamide adenine dinucleotide (NADH), are studied in anionic and cationic micelles. Acridinedione dyes (ADDs) are solubilized in micelles at the micelle-water interface and are in equilibrium between the aqueous and micellar phase. The binding of the ADDs with micelles is attributed to hydrophobic interactions and the binding constants are determined with steady-state and time-resolved techniques. Nanosecond laser flash photolysis studies are carried out in aqueous, anionic, and cationic micellar solutions. The ADD undergoes photoionization in the excited state to give a solvated electron. The solvated electron reacts with the ADD to give an anion radical. In anionic micelles, the yield of the solvated electron increases because of the efficient separation of the cation radical and the electron. Cation radicals derived from the photooxidation of ADDs are involved in keto-enol tautomerization. Under acidic conditions, an enol radical cation of the acridinedione dye is formed from the keto form of the cation radical by intramolecular hydrogen atom transfer. In cationic micelles, due to electrostatic attraction, the electron cannot escape from the micelle and recombination of the cation radical and the electron results in the formation of a triplet state. For the first time, a solvated electron is observed in the laser flash photolysis of ADDs in anionic micelles. The photoionization of ADDs depends on the excitation wavelength and is biphotonic at 355 nm and monophotonic at 248 nm. From the results with this NADH model compound, the sequential electron-proton-electron transfer oxidation of NADH is confirmed and the nature of the intermediates involved in the oxidation is unraveled; these intermediates are found to depend on the pH value of the medium.     

Crystal and Molecular Structure of an Acridinedione

The title compound, 10‐(4‐hydroxybenzoylamino)‐3,4,6,7,9,10‐hexahydro‐1,8‐(2H,5H)‐acridinedione monohydrate,C₂₀H₂₂N₂O₄.H₂O, consists of partially hydrogenated acridine moiety with one benzoylamino substituent on the central ring. The compound crystallizes in monoclinic system with P2₁/c space group and the unit cell constants are: a = 11.142(4), b = 12.266(2), c = 13.320(2) Å; β = 91.76(2)° and V = 1819.6(8) ų.The central ring (B) adopts boat and the outer rings (A and C) adopt sofa conformations. The water molecule takes part in OW‐H...O and N‐H...OW hydrogen bond formation with acridinedione and benzoylamino group. The oxygen atom O1 interacts through O–H...O bond with the hydroxyl group and in a head‐to‐tail link up of molecules that results in the formation of an infinite “supra molecular“ chain.     

Binding of Acridinedione Dyes with α, β and γ-Cyclodextrins: Fluorescence Quenching and Estimation of Thermodynamic Parameters

Using absorption and fluorescence spectroscopy, acridinedione (ACD) was found to be included into the -cyclodextrin (-CD) cavity to form a 1 : 1 inclusion complex. As a consequence of inclusion, the fluorescence of ACD is strongly quenched. Lifetime data confirm that the quenching is purely static. The association constant for the formation of the complex was calculated using linear and non-linear equations. H and S values obtained from the temperature dependent association constants of the -CD/ACD(B) system are reported. It was also observed that these dyes complexed very weakly with and -CD.     

微波辐射下一步合成9-芳基-1,2,3,4,5,6,7,8,9,10-十氢-1,8-吖啶二酮

以芳醛、1,3-环己二酮、醋酸铵为原料在无溶剂条件下经微波辐射合成了一系列9-芳基-1,2,3,4,5,6,7,8,9,10-十 氢-1,8-吖啶二酮. 该反应的反应时间短、产率高、环境友好、后处理方便. 产物的结构经红外光谱、核磁共振谱表征, 3d的结构经单晶X射线衍射进一步确证.