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991.
超氧化物歧化酶模型化合物的合成、表征及其SOD活性研究 总被引:4,自引:0,他引:4
合成了 4种过渡金属硝酸盐与三 (2 苯并咪唑亚甲基 )胺 (ntb)和水杨酸 (Hsal)的新固体配合物 ,经元素分析确定其组成分别为 [M2 (ntb) 2 (Hsal) 2 ](NO3 ) 2 ·H2 O(M =Zn ,Co)、[M2 (ntb) 2 (Hsal) ](NO3 ) 3 ·3H2 O(M =Cu)和 [M(ntb) (Hsal) ](NO3 )·2H2 O(M =Ni) ,进行了摩尔电导率、热重、红外与紫外可见光谱、1HNMR等性质的表征。研究了配合物的模拟SOD活性 ,用IC50 表征配合物的模拟SOD活性的大小。 相似文献
992.
固定有四硫富瓦烯.四氰基奎诺二甲烷的杂聚吡咯膜微葡萄糖电极 总被引:1,自引:0,他引:1
铂比互铂化处理后,形成疏松,粗糙的表面,将四硫富瓦烯-四氰基奎诺二甲烷导电有机盐入到铂化的铂黑微粒中。将3-羰基丁酸吡咯与吡咯按适当的比例在其表面用电化学聚合方法,将葡萄糖氧化酶固定于聚合形成的杂聚膜中制成微酶电极。该微酶电极测定时几乎不受氧分压影响,灵敏度高,响应快。 相似文献
993.
Dietmar Rahner Stefan Machill Heike Schlörb Kerstin Siury Matthias Kloss Waldfried Plieth 《Journal of Solid State Electrochemistry》1998,2(2):78-84
An overview is given of intercalation materials for both the negative and the positive electrodes of lithium batteries, including
the results of our own research. As well as lithium metal as a negative electrode, we consider insertion materials based on
aluminium alloys. In the case of the positive electrode metal-oxides based on manganese, nickel and cobalt are discussed.
Received: 27 May 1997 / Accepted: 30 July 1997 相似文献
994.
Hoebbel Dagobert Reinert Thomas Schmidt Helmut Arpac Ertugrul 《Journal of Sol-Gel Science and Technology》1997,10(2):115-126
The complexation degrees of Al-, Ti- and Zr-butoxide (M) with unsaturated and saturated -diketones (3-allylpentane-2.4-dione-APD, acetylacetone-ACAC) and -ketoesters (methacryloxyethyl-acetoacetate-MEAA, allylacetoacetate-AAA, ethylacetoacetate-EAA) as organic ligands (L) were examined by IR and 13 C NMR spectroscopy and were found to be L:M 1.5. The hydrolytic stability of the ligands of the metal alkoxide complexes (L:M = 1) during hydrolysis/condensation reactions at the molar ratio h (H2O : OR) = 0.5–2.0 decreases with increasing H
995.
一种新型吡嗪铱(Ⅲ)配合物的合成及其磷光性质 总被引:2,自引:0,他引:2
利用5-甲基-2,3-二苯基吡嗪(MDPP)和水合三氯化铱(IrCl3•H2O),合成了一种新型吡嗪铱配合物Ir (MDPP)2 (acac).通过1H NMR、元素分析和质谱方法对配合物结构进行了表征,并研究了配合物的吸收光谱和光致发光光谱.结果表明,配合物Ir (MDPP)2(acac)在393和528 nm处存在单重态1MLCT(金属到配体的电荷跃迁)和三重态3MLCT的吸收;在588 nm 处有较强的金属配合物三重态的磷光发射,是一种绿色磷光材料. 相似文献
996.
L. V. Morozova I. V. Tatarinova N. P. Kuznetsova M. V. Markova O. A. Tarasova L. M. Sinegovskaya T. I. Vakul’skaya A. I. Mikhaleva B. A. Trofimov 《Russian Chemical Bulletin》2006,55(6):1010-1014
Polyfunctionalized linear copolymers of N-allenylimidazole and di(ethylene glycol) divinyl ether with polyconjugated (polyvinylene) blocks in the main chain and exomethylene
bonds and vinyloxyethoxyethyl groups in the side chain were prepared. Using the reaction of the copolymers with CuCl2, a possibility of synthesis of polymeric metal complexes for catalysis of organic reactions was shown. The IR and ESR spectra
of the complexes were studied.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 973–977, June, 2006. 相似文献
997.
Shingo KomatsuYouichi Sakamoto Toshiyasu Suzuki Shizuo Tokito 《Journal of solid state chemistry》2002,168(2):470-473
Perfluoro-1,3,5-tris(p-quaterphenyl)benzene (PF-13Y) and perfluoro-1,3,5-tris(p-quinquephenyl)benzene (PF-16Y) have been synthesized and characterized. They showed higher glass transition temperatures compared with perfluoro-1,3,5-tris(p-terphenyl)benzene (PF-10Y). Organic light-emitting diodes were fabricated using these materials as the electron-transport layers. PF-13Y and -16Y are better electron transporters than PF-10Y. The electron mobilities of PF-10Y and Alq3 were measured by the time-of-flight technique. PF-10Y showed higher electron mobilities (10−4 cm2/V s) and weaker electric field dependence compared with Alq3. 相似文献
998.
Matthew Myers Eric F. Connor Thierry Glauser Andreas Mck Gregory Nyce James L. Hedrick 《Journal of polymer science. Part A, Polymer chemistry》2002,40(7):844-851
A new metal‐free synthetic approach to the controlled ring‐opening polymerization (ROP) of lactide with nucleophilic phosphines as transesterification catalysts is described. P(Bu)3, PhPMe2, Ph2PMe, PPh3, and related phosphines are commercially available, inexpensive catalysts that generate narrowly dispersed polylactides with predictable molecular weights. These organic catalysts must be used in combination with an initiator, such as an alcohol, to generate an alcoholate ester α‐end group upon ROP. A likely polymerization pathway is through a monomer‐activated mechanism, with minimal active species, facilitating narrow molecular weight distributions. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 40: 844–851, 2002; DOI 10.1002/pola.10168 相似文献
999.
Summary Basic alumina-bonded diethylenetriaminepentaacetic acid (DTPA) has been utilized for the separation and preconcentration of
some transition metal ions on the basis of ligand exchange. Breakthrough capacity and rate of sorption have been studied.
The distribution coefficients of 16 transition metal ions have been determined in demineralized water, 0.01 M sodium citrate
and in four different pH systems. On the basis of differences in Kd values some quantitative separations of metal ions have
been achieved. The greater selectivity behaviour (higher Kd values) of the adsorbent for Pt(IV)and Cr(III) has been utilized
for their preconcentration in the presence of other metal ions. The method has been employed for the recovery of Pt(IV) and
Cr(III) from tapwater and sea-water samples. 相似文献
1000.
Philippe Quevauviller Gemma Rauret Allan Ure Roser Rubio José-Fírmin López-Sánchez Haidé Fiedler Herbert Muntau 《Mikrochimica acta》1995,120(1-4):289-300
The determination of extractable trace metal contents in soil using single extraction procedures is currently performed in many laboratories to assess the bioavailable metal fraction (and related phytotoxic effects) and the accessability to the environment (e.g. contamination of ground waters). Owing to the need for validation of the extraction schemes used and of the analytical techniques, the EC Measurements and Testing Programme (formerly BCR) has organized a project for improving the quality of determination of extractable trace metal contents in soil, the first step being an interlaboratory study to adopt common extraction procedures and the second being a certification campaign to certify two soils for their extractable trace element contents following these procedures. This paper gives a brief overview of the project organisation and describes the preparation, homogeneity and stability studies of two soil candidate reference materials (sewage sludge-amended and terra rossa soils). 相似文献