卟啉-蒽醌-苦味酸三联苯化合物的合成及其荧光性质初探

本文介绍了卟啉-蒽醌-苦味酸(P-AQ-T)三联体化合物的合成。以卤乙酰卤与1,5-二氨基蒽醌反应, 生成1,5-二(卤乙酰氨基)蒽醌, 再与卟啉和苦味酸联结, 得到P-AQ-T三联体。同时进行了荧光性质的比较。     

四苯硼酸盐的热化学研究——Ⅱ.一价四苯硼酸盐的标准生成焓

本文用自行建立的精密溶解层热装置测定了298.15K时,NH₄BPh₄、KBPH₄、RbBPh₄、CsBPh₄、TlBPh₄、AgBPh₄和HgPh₂七种沉淀反应的反应焓,由此计算了一价四苯硼酸盐的标准生成焓、熵及吉布斯自由能.     

Synthesis, structure, electrochemistry, photophysics and electroluminescence of 1,3,4-oxadiazole-based ortho-metalated iridium(III) complexes

Four new iridium(III) complexes 1-4, with 1,3,4-oxadiazole derivative as cyclometalated ligand for the first time, have been synthesized and structurally characterized by NMR, EA, MS and X-ray diffraction analysis (except 1). The stronger ligand field strength of the dithiolate ancillary ligands results in higher oxidation potentials and lower HOMO energy levels of complexes than acetylacetone. The absorption spectra of these complexes display low-energy metal-to-ligand charge transfer transition ranging from 350 to 500 nm. Complexes with dithiolate ancillary ligand emit at maximum wavelengths of ca. 500 nm, blue shifting 17 and 11 nm with respect to their counterpart with acetylacetone ligand. The electrophosphorescent devices with 2-4 as phosphorescent dopant in emitting layer have been fabricated. All devices have a low turn-on voltage in the range of 4.5 and 4.9 V. A high-efficiency green emission with maximum luminous efficiency of 5.28 cd/A at current density of 1.37 mA/cm² and a maximum brightness of 2592 cd/m² at 15.2 V has been achieved in device using 2 as emitter.     

Study on the retention behaviour of platinum metal complexes in reversed-phase high-performance liquid chromatography

The separation and determination of Os(IV), Ir(IV), Pt(II), Ru(III), Co(II) and Ni(II) complexes with 2-(6-methyl-2-benzo-thiazolylazo)-5-diethylaminophenol (MBTAE) was studied on RP-HPLC. The effects of methanol concentration, pH-value of the mobile phase, column temperature (T), total flow rate and foreign ions on the retention behaviour have been investigated in detail. It has been shown that the logarithm of the capacity factor (ln k) is in linear relation to the methanol concentration of the mobile phase and the reciprocal of the column temperature (T). The six complexes can be separated within 30 min in a methanol-buffer system.     

Synthesis and in vitro Property Study of Polyaspartamides

Cationic polyaspartamides including poly-α,β-[N＇-（2-aminoethyl）-L-aspartamide] （PAEA）, poly-α,β-[N＇-（4- aminobutyl）-L-aspartamide] （PABA）, poly-α,β-[N＇-（6-aminohexyl）-L-aspartamide] （PAHA）, poly-α,β-[N＇-（5-amino- 3-azapentyl）-L-aspartamide] （PAAPA） and poly-α,β-[N＇-（8-amino-3,6-diazaoctyl）-L-aspartamide] （PADAOA） were synthesized from polysuccinimide. Their properties were evaluated by ^1H NMR, IR, GPC, fluorescence measurement and in vitro cytotoxicity assays. The molecular weights per primary amine charge group of PAEA（1） （Mn= 2229）, PAAPA and PADAOA are 212, 279, and 226. Polyaspartamides including PAEA（1）, PAAPA, PADAOA and low molecular weight PAHA are markedly less toxic than poly（ethyleneimine） and poly（L-lysine）, however, PABA and higher molecular weight PAHA are slightly less toxic than poly（L-lysine）. Cell cytotoxicity of PAHA was seen to decrease with increasing molecular weight of PAHA, due to water solubility reduction. The negatively charged plasmid DNA has been found to be completely neutralized and complexed by the cationic polyaspartamides at an N/P ratio of 5 ： 1 to 10 ： 1, forming self-assembled polyplexes via ionic interactions. These polyaspartamide/DNA complexes possess stable zeta potentials and mean particle diameters of about 180 nm for PAEA （1）/DNA and PAAPA/DNA complexes and 280 nm for PADAOA/DNA complexes.     

四-(对甘-缬二肽苯基)卟啉及其过渡金属配合物的研究

本文以四-(对氨基苯基)卟啉和N-氯乙酰缬氨酸为原料，在DMF中首次合成了一种新型的含二肽基团的四苯基卟啉，四-(对甘-缬二肽苯基)卟啉(H₂L)，及其Mn(Ⅲ)、Fe(Ⅲ)、Co(Ⅱ)、Ni(Ⅱ)、Cu(Ⅱ)、Zn(Ⅱ)配合物MnLCl, FeLCl, CoL, NiL, CuL, ZnL，用元素分析、红外光谱、电子光谱、荧光光谱、氢核磁共振谱和激光拉曼光谱进行了表征，研究了这些新型配合物与含N、S碱的轴向加合性质。     

A High-efficiency Preparation,Properties and Structure of (R,S)- and (S,S)-Pyrrolidine-2-carboxylic Acid 3,5-Dioxa-4-boracyclohepta[2,1-a;3,4-a′]dinaphthalen-4-yl Esters

Introduction(R ,S) and (S ,S) pyrrolidine 2 carboxylicacid 3,5 dioxa 4 boracyclohepta[2 ,1 a ;3,4 a′]dinaphthalen 4 ylesters ,namely (S) and (R) 1,1′ bi 2 naphtholboricacid (S) prolineanhydrides [(R ,S) BNBAPand (S ,S) BNBAP],areintermediatesinthepreparationofver satilechiralauxiliariesenantiopure 1,1′ bi 2 naphthols .1Recently ,itwasobservedthattheycouldcatalyzeanum berofasymmetricreactions .2 Therefore ,itisimportanttodevelopamoreconvenientproceduretoprepare .Previou…     

Aptamer-based turn-on fluorescent four-branched quaternary ammonium pyrazine probe for selective thrombin detection

In this thrombin detection system, the bright fluorescence of TASPI is almost eliminated by the DNA aptamer TBA (turn-off); however, in the presence of thrombin, it specifically binds to TBA by folding unrestricted TBA into an anti-parallel G-quadruplex structure and then releasing TASPI molecules, resulting in vivid and facile fluorescence recovery (turn-on).     

Predominating stable adsorption and direct electrochemistry of glucose oxidase on carbon nanotubes by oxygen-containing groups

Stable adsorption and direct electrochemistry of glucose oxidase (GOx) occurred on nitric acid (HNO3)-treated multi-walled carbon nanotubes (MWNTs) instead of as-received MWNTs, demonstrating the critical roles of oxygen-containing groups in stableadsorption and direct electrochemistry of GOx on carbon nanotubes (CNTs).     

Kinetics and mechanism of photolysis of the iron(III) complex with tartaric acid

The formation of MV^•+ radical cations was observed upon the laser flash photolysis of the iron(III) tartrate complex [Fe^IIITart]⁺ (1) in the presence of methyl viologen (MV²⁺). The rate constants of the reactions involving MV^•+ were measured. The intramolecular electron trans-fer to form Fe^II and escape of the organic radical to the solvent bulk upon the photolysis of 1 were proposed. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 866–869, May, 2007.