单链四苯酚基卟啉在CTAB胶束微环境中的去质子化现象

叶绿素分子的光能转化功能的实现与其聚集状态、所处微环境性质及条件密切相关[1,2]．如何设计控制叶琳类分子在膜介质中的增溶位置，对于研究叶琳在膜体系中的跨膜电子传递、光能转化过程具有重要意义．本文研究了长链双亲卟啉──单链四苯酚基叶琳THPPH2在CTAB胶束中的去质子化，该过程能控制叶琳环在胶束中的增溶位置，使其由内核转移到胶束表面．1实验部分1·1仪器和测试条件岛津UV－240型紫外可见光谱仪（带有恒温夹套），狭缝宽2nm，石英池厚1cm，所用试剂皆为分析纯．UV光谱测试均在恒温条件下进行．1．2溶液的配制含一个十六…     

8-羟基喹哪啶固相萃取光度法测定水样中的铁

研究了8-羟基喹哪啶与铁的显色反应，在pH为8．0的氯化氨-氨水缓冲介质中，在十六烷基三甲基溴化铵(CTMAB)存在下，8-羟基喹哪啶与铁反应生成3：1稳定的蓝紫色络合物，该络合物可被Waters Sep-Park-C18固相萃取小柱萃取，用乙醇洗脱后用光度法测定，络合物λmax=600nm。在此波长下其它金属离子的络合物无光吸收，对铁选择性很好，铁含量在0-5mg/L内符合比尔定律，方法用于水样中痕量铁的测定，结果令人满意。     

5,15-二(对-取代苯基)八烷基卟啉及其金属配合物的合成

本文报道了五种5,15-二(对-取代苯基)-2,8,12,18-四乙基-3,7,13,17-四甲基卟啉(Ⅱa—Ⅱe)和五种5,15-二(对-取代苯基)-2,3,7,8,12,13,17,18-八甲基卟啉(Ⅰa—Ⅰe)以及它们的铜、铁、镍金属配合物的合成。这些化合物的结构均经元素分析、UV、~1HNMR和MS鉴定。芳环上不同取代基对卟啉成环反应有一定影响,拉电子基团有利于反应。其顺序如下:NO_2>H>CH_3>OCH_3>N(CH_3)_2。     

铁系元素冠醚配合物的研究——V.三氯化铁与4′-溴苯并-15-冠-5固态配合物的合成和性质

本文报导了三氯化铁(水合物)与4′-溴苯并-15-冠-5(L)固态配合物的合成,对合成的新配合物,进行了元素定量分析及摩尔电导测定,并作了红外光谱、紫外光谱,热重和差热以及X-射线粉末衍射分析的性质表征。从而证明,该配合物中FeCl₃与配体L比为1:1,是溶化剂,含有结晶水的固态配合物。     

Synthesis and antitumor activity of DNA binding cationic porphyrin-platinum(II) complexes

A new series of DNA binding 5,10,15-tri(N-methyl-4-pyridiniumyl)porphyrin (TrisMPyP)-platinum(II) conjugates was synthesized, in which different spacer ligands were used for appropriate coordination to platinum(II) complexes. Compound 9b exhibited in vivo antitumor activity (T/C%, 294) superior to cisplatin (T/C%, 184) against the leukemia L1210 cell line.     

紫外分光光度法测定中草药中铁的含量

对白芍、党参、白术、茵陈、天冬、枸杞子、当归、菟丝子、金银花、桔梗中微量元素铁的含量进行了测定,为进一步研究其药理作用提供基础。中草药消化后配制成溶液,用邻二氮菲作显色剂,使用UV-1200型紫外分光光度计在510 nm处测定各样品的吸光度(A),求出样品中微量元素铁的含量。结果显示,当归和金银花中铁的含量较丰富,分别为(135.367 8±0.111 1)μg/g和(125.936 4±0.159 9)μg/g;桔梗含铁量最少,为(3.510 9±0.159 9)μg/g,10种中草药中铁含量有显著性差异(P<0.05)。结果为使用中草药治疗系统疾病提供了可靠数据,10种中草药在用量范围内Fe含量适合人体每天正常摄入量。     

氯化二氯代四苯基卟啉磷合二氯甲烷的晶体结构

氯化二氯代四苯基叶啉磷（Dichloro（5，10，15，20－tetraphenylporphinato）－phosphorus（V）chloride，［PCl2TPP］Cl）是典型的非金属卟琳配合物．据文献报导［1］该配合物能够与噻吩类化合物反应，所得单体经电解氧化，可生成具有导电性的聚合物．因此，测定［PCl2TPP］Cl的分子结构有着十分重要的意义．1标题化合物的制备及单晶生长标题化合物技文献［2］合成．用于X－射线衍射的单晶样品是将标题化合物的二氯甲烷／正庚烷混合溶液静置数周后得到的．单晶为紫色，用于X－射线衍射测定的晶粒尺寸为0．38mm×0．38mm×0．28mm．…     

On the symmetry of iron(III) tris-acetylacetonate crystals

The crystal structure of iron tris-acetylacetonate is re-determined. Crystal data at 293 K are: a = 15.4524(5) Å, b = 13.5876(4) Å, c = 16.5729(7) Å, Z = 8; at 150 K: a = 15.2541(4) Å, b = 13.4451(3) Å, c = 16.4256(5) Å, Z = 8. The structure is molecular and comprises isolated molecules. The coordination polyhderon of iron is an almost regular octahedron, Fe-O bond lengths are 1.977–2.003 Å (293 K) and 1.982–2.006 Å (150 K). In the crystalline state, the molecules are arranged in layers, and iron atoms are located on a plane yielding an almost regular trigonal net with the Fe...Fe separations of 7.558–8.103 Å (293 K) and 7.472–8.017 Å (150 K). The adjacent layer is positioned exactly over the first one with a Fe...Fe distance of 8.303 Å (293 K) and 8.236 Å (150 K).     

Comparison of slurry sampling and microwave-assisted digestion for calcium, magnesium, iron, copper and zinc determination in fish tissue samples by flame atomic absorption spectrometry

The development of a slurry sampling method for the determination of calcium, copper, iron, magnesium and zinc in fish tissue samples by flame atomic absorption spectrometry is described. In comparison with microwave-assisted digestion, the proposed method is simple, requires short time and eliminates total sample dissolution before analysis. Suspension medium was optimized for each analyte to obtain quantitative recoveries from fish tissue samples without matrix interferences. Nevertheless, iron recoveries higher than 46% were not found. Treatment of samples slurried in nitric acid by microwave irradiation for 15-30 s at 75-285 W permitted to achieve efficient recoveries for calcium, iron, magnesium and zinc. Further improvement in the matrix effects for iron determination was accomplished by the use of an additional step of short microwave-assisted suspension treatment. However, standard addition method was required for calcium and copper determination, being necessary hydrochloric acid as suspension medium for the last one. Although copper could not be determined in the certified reference material using microwave-assisted digestion, the accuracy of the slurry sampling method was verified for all the investigated analytes. Detection limits were 22.8 ± 8.0, 0.884 ± 0.092, 5.07 ± 0.76, 35.5 ± 0.7 and 1.17 ± 0.04 μg g⁻¹ for calcium, copper, iron, magnesium and zinc, respectively. The standard deviations obtained using slurry sampling method and microwave-assisted digestion were not significantly different, and the mean relative standard deviation of the over-all method (n = 3) of the slurry sampling method for different concentration levels was below 12%.     

卟啉化合物的共振能

具有芳香性的卟啉环的共振能是卟啉类化合物的重要结构参数,据此可以讨论卟啉的光谱和化学反应性能等问题。本文根据分享键能(Contributing Bond Energy)的概念,对复杂分子卟啉的键能进行了计算。采用分享键能和键解离能(Bond Dissociation Energy)的差值,计算了某些卟啉化合物的共振能。计算方法简便,计算结果与以前文献报道的以及实验值符合。