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Singlet Oxygen Generation and Photoinduced Charge Separation of Tetra Polyethyleneglycol Functionalized Zinc Phthalocyanine-Fullerene Dyad

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Chinese Journal of Chemistry 2016年第10期34卷 969-974页

作者： Habtom B. Gobeze Ta Tram Chandra B. kc Robert R. Cantu Paul A. Karr Francis D'Souza Department of Chemistry University of North Texas 1155 Union Circle #305070 Denton TX 76203-5017 USA Department of Physical Sciences and Mathematics Wayne State College 111 Main Street Wayne Nebraska 68787 USA Advanced Materials and Manufacturing Processes Institute (A MMPI) UNT-Discovery Park 3940 N. Elm St. #E132 Denton TX 76207-7102 USA

Utilization of polyethyleneglycol （PEG） functionalized zinc phthalocyanine, （PEG）4ZnPc in （i） singlet oxygen generation, and （ii） in building energy harvesting donor-acceptor systems using fullerene, C60 as an acceptor via the well-known metal-ligand axial coordination approach is reported. The （PEG）4ZnPe was found to be capable of producing singlet oxygen with a quantum yield, ooa of 0.77 in toluene, a value higher than that obtained for pristine （t-bu）4ZnPc （φ△=0.54） carrying no PEG groups, revealing its usefulness in photodynamic therapy applications. Spectroscopic studies revealed efficient binding of phenylimidazole functionalized fullerene, C60 Im with l ： 1 stoichiometry to （PEG）4ZnPc. Binding constant K for the formation of （PEG）4ZnPc：ImC60 dyad was found to be 6 × 103 M 1 revealing moderate stability. Geometric and electronic studies of the dyad was arrived by B3LYP/3-21G（＊） method. The HOMO level was found to be on zinc phthalocyanine entity while the LUMO level was found to be on the C60 entity suggesting formation of （PEG）4ZnPc＊＋：ImC60＊ charge separated state during the process of electron transfer reaction. Redox studies on the （PEG）4ZnPc：ImC60 dyad enabled accurate determination of the oxidation and reduction potentials of the donor-acceptor system, and to evaluate free-energy changes associated for the charge separation process. Kinetics of photoinduced charge separation and recombination in the （PEG）4ZnPc：ImC60 dyad was investigated using femtosecond transient absorption studies. Relatively long-lived charge separated states were confirmed for the dyad suggesting their potential usefulness in energy harvesting applications.

关键词： singlet oxygen photoinduced charge separation zinc phthalocyanine fullerene self-assembly

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猜一猜,学一学(英文)

疯狂英语（初中天地） 2005年第11期 44-45页

作者： kc

以下有几则对话,根据上下文的内容,你能够猜出黑体的英语成语的意思吗?试试看,对话后有一道连线题将对你进行测试。要想学会这些成语可不要忘记大声朗读对话哦!

关键词：英文

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电影会话(英文)

疯狂英语（初中天地） 2007年第1期 43-45页

作者： kc

看电影是不错的娱乐方式。以下是关于电影的日常对话,请根据以下三大步骤,学习这个电影会话。Step 1:Listen to the dialogue carefully (步骤一:仔细听对话。) Step 2:Fill in the blanks with the correct sentence (步骤二:把正确的... 详细信息

看电影是不错的娱乐方式。以下是关于电影的日常对话,请根据以下三大步骤,学习这个电影会话。Step 1:Listen to the dialogue carefully (步骤一:仔细听对话。) Step 2:Fill in the blanks with the correct sentence (步骤二:把正确的句子填入空格内。) Step 3:Learn the language tips and speak up the dialogue with your friends (步骤三:学习“语言归纳”并跟你的伙伴一起大声练习对话。)

关键词： John 英文

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猜一猜,学一学(英文)

疯狂英语（初中天地） 2006年第3期 44-45页

作者： kc

根据上下文的内容,你能够猜出黑体的英语成语的意思吗?试试看,每个Guess后有一道连线题将对你进行测试。要想学会这些成语可不要忘记大声朗读哦!

关键词： head 英文

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情景会话

疯狂英语（初中天地） 2006年第10期 44-45页

作者： kc

这是一个描述两个年轻人从相遇到相识,并且携手共同面对人生重重考验的生动故事。随着情节的发展,我们将会学到一系列地道的英语表达法。本期“口语角”节选了故事开端的对话:男主角约翰和女主角梅因一次意外而相遇。究竟约翰与梅是怎... 详细信息

这是一个描述两个年轻人从相遇到相识,并且携手共同面对人生重重考验的生动故事。随着情节的发展,我们将会学到一系列地道的英语表达法。本期“口语角”节选了故事开端的对话:男主角约翰和女主角梅因一次意外而相遇。究竟约翰与梅是怎样认识的呢?当我们感到尴尬或生气时,又应如何用英语表达呢?

关键词：英语表达

The Investigation of K Shell X-Ray Fluorescence Parameters for Sulphur Atom in Different 1,2,4-Triazoles

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光谱学与光谱分析 2017年第9期37卷 2961-2965页

作者： N.Kup Aylikci Y.Unver V.Aylikci D.Unluer E.Dugdu Energy Systems Engineering Faculty of Engineering and Natural SciencesIskenderun Technical University 31600HatayTurkey Department of Chemistry Faculty of Arts and SciencesKaradeniz Technical University 61080TrabzonTurkey Metallurgical and Materials Engineering Faculty of Engineering and Natural SciencesIskenderun Technical University 31200HatayTurkey

The measurement of K shell fluorescence parameters is an easy and practical way to investigate the electronic structures of elements in alloys,compounds or *** the number of valence electrons will change the screening effect,the measured parameters will be affected from the *** this study,the measured parameters were investigated for sulphur element according to the number of CH_2 *** the experimental measurements,the samples were excited by 59.5keVγrays from a 241 Am annular radioactive *** emitted K X-rays from the samples were counted by ab Ultra-LEGe detector with a resolution of 150 eV at 5.9keV.

关键词：波长解调边缘滤波法干涉型光纤传感器啁啾光栅

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实用英语(英文)

疯狂英语（初中天地） 2006年第9期 43-44页

作者： kc

“实用英语”是一个关于英语学习的电台节目,希望同学们能从节目中学到英式英语的新词汇和新说法。本期学习的词汇是shades(墨镜)和kip(睡觉)。现在让我们来听听主持人是如何介绍这两个词的用法吧!

关键词：实用英语

Helicobacter pylori colonization of the oral cavity:Amilestone discovery

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World Journal of Gastroenterology 2016年第2期22卷 641-648页

作者： John kc Yee Research Lab of Oral H.pylori EverettWA 98208United States

Over the past several years, the severity of Helicobacter pylori(H. pylori) infections has not significantly diminished. After successful eradication, the annual H. pylori recurrence rate is approximately 13% due tooral H. pylori infection. Established clinical diagnostic techniques do not identify an oral etiologic basis of H. pylori prior to gastric infection. There has been disagreement as to whether oral infection of H. pylori exists or not, with no definite conclusion. In medical practice, negative results with the urea breath test suggest that the stomach infection of H. pylori is cured in these patients. In fact, patients can present negative urea breath test results and yet exhibit H. pylori infection due to oral infection. The present paper provides evidence that H. pylori oral infection is nonetheless present, and the oral cavity represents a secondary site for H. pylori colonization.

关键词： Antigen test for oral urease Cell culture Helicobacter pylori Lysine and glycerol monolauratemouthwash solution Oral cavity

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你是否被英语弄糊涂了?

疯狂英语（初中天地） 2005年第8期 41-42页

作者： kc

我们在学英语的过程中经常会遇到意义相近的单词或词组,有时候一个意思有几个不同的表达方式。对于这种情况,你是否感到很困惑呢?以下是英国一位语言专家Manin Parrott为大家解答“meet”与“meet with”的区别,以及从“I will meet yo... 详细信息

我们在学英语的过程中经常会遇到意义相近的单词或词组,有时候一个意思有几个不同的表达方式。对于这种情况,你是否感到很困惑呢?以下是英国一位语言专家Manin Parrott为大家解答“meet”与“meet with”的区别,以及从“I will meet you”引申出几个常用的口语表达方式。我们还在文章后为同学们设计了一个小测试, 看看大家是否掌握了这些口语表达方式。Enjoy!

关键词：表达方式