尾式卟啉-三乙胺和吡啶季铵盐的NMR研究

为了改善卟啉显色剂对金属离子选择性较差的缺点,新合成了尾式卟啉-三乙胺季铵盐和吡啶季铵盐六种化合物,对新化合物进行元素分析,确定其组成.用NMR和IR研究其化合物的结构,并讨论六种化合物核磁共振谱关系特征及其规律.     

不同链长尾式卟啉—三乙胺和吡啶季铵盐的HNMR研究

为了改善卟啉显色剂对金属离子选择性较差的缺点,新合成了不同链长尾式卟啉－－三乙胺季铵直力吡季铵盐六种化合物,对新化合物进行元素分析,确定其组成,用ＮＭＲ和ＩＲ研究其化合物的结构,并讨论六种化合物核磁共振谱关系特征及其规律。     

几种新型手性季铵盐-卟啉化合物的合成与表征(Ⅱ)

本文合成了4种新的N-甲基麻黄素或奎宁手性季铵盐-卟啉化合物,并用元素分析、红外光谱、紫外-可见光谱、核磁共振谱、质谱确定了其结构.     

两种新型卟啉吡啶季铵盐的合成

合成了两种新型卟啉吡啶季铵盐:溴化5-[4-N-(对硝基)苄铵基吡啶基]-10,15,20-三(4-N吡啶基)卟啉和氯化5-[4-N-(对甲氧基)苄铵基吡啶基]-10,15,20-三(4-N-吡啶基)卟啉.这两种化合物尚未见文献报道,它们的结构分别由紫外可见光谱、红外光谱、核磁共振谱、质谱、元素分析得到确证.     

几种新型手性季铵盐—卟啉化合的的合成与表征（Ⅱ）

本文合成了 4种新的 N-甲基麻黄素或奎宁手性季铵盐 -卟啉化合物 ,并用元素分析、红外光谱、紫外 -可见光谱、核磁共振谱、质谱确定了其结构。     

几种新型手性季铵盐-卟啉化合物的合成与表征(Ⅰ)

本文合成了四个新的Ｎ－甲基麻黄素或奎宁手性季铵盐－卟啉化合物,并用元素分析、红外光谱、紫外可见光谱、核磁共振谱、质谱确定了其结构。     

新型尾式卟啉-三乙胺和吡啶季铵盐的红外光谱研究

本文对新合成的三个尾式卟啉季铵盐的红外光谱吸收带进行了归属和总结。讨论了红外吸收频率随取代基不同而发生变化的原因,以及不同链长时的诱导效应对＝Ｃ－Ｏ－Ｃ键的影响。     

新型卟啉吡啶季铵盐对铜(Ⅱ)显色反应的研究

研究了在不使用表面活性剂的情况下,新型卟啉吡啶季铵盐溴化5-[4-N-(甲氧基)苄铵基吡啶基]-10,15,20-三(4-N-吡啶基)卟啉对铜(I)的显色反应.结果表明,在pH=1.2时卟啉与Cu2 形成了稳定的配合物,其最大吸收波长为423nm,试剂与Cu2 络合比为1:1,表观摩尔吸光系数为3.24×105L·mol-1·cm-1,铜含量在0-0.8μg/10mL范围内符合比耳定律,该方法应用于环境水样中铜的测定,结果令人满意.     

新型卟啉吡啶季铵盐与铜(Ⅱ)显色反应的研究

本文研究了在不使用表面活性剂情况下,新型卟啉试剂溴化５－［４－（４－吡啶丁氧基）苯基］－１０,１５,２０－三（４－甲氧基苯基）卟啉与铜（Ⅱ）的显色反应。结果表明,ｐＨ＝５－７时,铜（Ⅱ）与此卟啉形成了稳定配合物,其表观摩尔吸光系数为２．３７×１０５Ｌ·ｍｏｌ－１·ｃｍ－１,铜浓度在０－１．２μｇ／１０ｍＬ范围内服从比耳定律。配合物组成的摩尔比为Ｃｕ∶卟啉吡啶季铵盐＝１∶２,本方法应用于环境水样中铜的测定,结果满意     

一种新型尾式卟啉吡啶季铵盐对锌离子显色反应的研究

本文研究了一种新型尾式卟啉吡啶季铵盐５－「４－（４－吡啶丁氧基）苯基」－１０,１５,２０－三（４－氯苯基）卟啉溴化物与锌的反应条件。ＰＨ＝１０．０,在吡啶存在下于沸水浴中加热１５ｍｉｎ,其与Ｚｎ＾２＋形成１：１配合物,其最大吸收波长位于４２８．６ｎｍ,在此条件下试剂的最大吸收波长在４１８．２ｎｍ,相差１０ｎｍ,配合物摩尔吸光系数４．６４×１０＾５Ｌ·ｍｏｌ·ｃｍ＾－１,锌在０－１．２μｇ／１０ｍＬ     

Investigation of Antimicrobial Properties of QASs<Superscript>+</Superscript> (Novel Synthesis)

Quaternary ammonium salts (QASs) are bioactive materials known for their antimicrobial effects. However, it is difficult to provide desirable quaternary ammonium salts. Thus, firstly new quarternary ammonium salts which are not in the literature were synthesized and organoclays were prepared with different quarternary ammonium salts content. The organoclays included quaternary ammonium salts such as N,N-di (3-methyl butyl)-N-(1-phenylethyl)-N-methyl ammonium Iodide (QAS-1), N,N-dipentil-N-(1-phenylethyl)-N-methyl ammonium Iodide (QAS-2), and N,N-dihexcyl-N-(1-phenylethyl)-N-methyl ammonium Iodide (QAS-3) which were newly synthesized for modification of Na⁺-montmorillonite (Na⁺-Mt) and were characterized by nuclear magnetic resonance spectroscopy (NMR). Synthesized organoclays were characterized by using Fourier transform infrared (FTIR), scanning electron microscopy (SEM) and X-ray diffraction (XRD). Characterization results proved that the modification is performed with high performance and as seen in the XRD results, the interstratum distances increased considerably and the diffraction angles decreased. The antimicrobial activity of the organoclays against Staphylococcus aureus and Escherichia coli were studied in detail and were obtained much larger inhibition zones than similar studies. QAS-3-Mt organoclay showed the maximum of antimicrobial activity against S. aureus and E. coli. As is known, organoclay comes among the fillers that play the most effective role in the synthesis of composite materials. In this context, the product we have synthesized is unique and can be used for many purposes.     

Experimental Correlations of JNC With S-Character

Some quaternary ammonium salts and isonitriles are examined by ¹³C NMR. A Fermi-Contact type of correlation is suggested as a basis for estimation of the effect of lone pairs, alkyl substitution and π-bonding on ^JNC     

季铵盐型魔芋葡甘聚糖衍生物的合成、表征及生物学活性

以魔芋葡甘聚糖为载体,以硝酸铈铵作引发剂,用甲基丙烯酰氧乙基-十四烷基-二甲基溴化铵为活性单体进行接枝共聚反应制备季铵盐型魔芋葡甘聚糖衍生物。用核磁共振,红外光谱,DSC和激光粒度Zeta电位仪对接枝产物进行了表征和测定,用悬菌定量实验研究了其抗菌性能。结果表明：(1)甲基丙烯酰氧乙基-十四烷基-二甲基溴化铵通过其双键接枝到魔芋葡甘聚糖表面,接枝率随着季铵盐单体的用量增加而提高;(2)魔芋葡甘聚糖的零电位在pH 4.5,魔芋葡甘聚糖季铵盐衍生物的零电位在pH 9.9,季铵基的引入使其零电位发生了较大的位移;(3)所制备的魔芋葡甘聚糖季铵盐衍生物对大肠杆菌、金黄色葡萄球菌以及白色念珠菌在振荡作用15 min后,平均杀菌率分别为99.99％,99.99％和98.13％。     

有机膨润土制备及性能表征

采用湿法工艺,分别用十六烷基三甲基氯化铵、十八烷基二甲基苄基氯化铵、十八烷基三甲基氯化铵与钠基膨润土,进行离子交换反应合成了有机膨润土。以红外光谱、X-ray衍射和差热分析等手段对改性膨润土进行了结构表征,讨论了不同的季铵盐对有机膨润土性能的影响。实验表明,表面活性剂离子进入膨润土晶片层间,使其晶片层间的亲水环境改变为疏水环境并增大晶片层间距离,为制备高聚物/膨润土纳米复合材料奠定基础。     

膨润土的短碳链季铵盐改性研究

以自制的钠基膨润土为原料、用四甲基氯化铵和四丁基氯化铵作为有机插层剂与膨润土层间的Na+交换, 制备出有机膨润土, 并经红外光谱分析(IR)、差热分析(DTA)和X-ray衍射分析(XRD)等测试手段对其结构进行表征。讨论了不同的季铵盐对有机膨润土性能的影响。实验表明,表面活性剂离子进入膨润土晶片层间,使其晶片层间的亲水环境改变为疏水环境以及增大晶片层间距离,增加膨润土与有机相的相容性, 为制备高聚物/膨润土纳米复合材料奠定基础。     

The Study of the Conformation and Dynamics of the New Quaternary Phosphonium Salts by NMR Spectroscopy

A number of quaternary phosphonium salts on the basis of pyridoxine derivatives were investigated by nuclear magnetic resonance (NMR) spectroscopy methods. Conformational exchange processes for each compound in solution were studied using dynamic NMR experiments. Energy barriers of the conformational transitions were determined.