8-氨基喹啉两亲配体的光谱性质、Langmuir-Blodgett膜及其对铜离子的传感作用

研究了两亲配体2-十二烷基丙二酸二(8-氨基喹啉)酰胺(H2A)的UV-Vis光谱和荧光光谱。铜离子对配体的荧光有明显的猝灭作用。研究了H2A及其与铜的两类配合物的单分子成膜性能和LB膜的俄歇电子能谱。CuA的成膜性能明显比H2A好,俄歇电子能谱表明H2A单分子膜在膜/水界面与亚相Cu2+生成了1∶1的配合物。H2A的LB膜可以用作为Cu2+离子的传感材料,线性范围为0.1～1.0μmol/L。     

8-羟基喹啉两亲配体的合成、表征和单分子成膜性能

设计合成了以8-羟基喹啉为亲水头基的两亲配体2-十二烷氧基羰基．8-羟基喹啉（H2A^12）和2-十六烷氧基羰基-8-羟基喹啉（H2A^16）。通过元素分析、红外光谱、核磁共振谱和UV-Vis光谱表征鉴定了这两个化合物。H2A^12。和H2A^16及萁LB膜可用作电致发光器件的发光层。     

2-(8-羟基喹啉-7-亚甲氨基)苯甲酸及其金属配合物的合成与表征

以8-羟基喹啉为原料,通过Reimer-Tiemann反应得到8-羟基喹啉-7-醛,然后与邻氨基苯甲酸缩合得到标题化合物及其金属配合物。通过IR、UV、1HNMR、元素分析、热失重分析等对其结构和性能进行表征,确定配合物分子组成为Zn2.5L·2H2O和Al2(L·1.5H2O)·H2O。测定了两种配合物的荧光性,其最大荧光发射波长(λmax)分别为493、497 nm,通过荧光滴定光谱求得标题配合物与Zn2+和Al3+两种离子的结合常数logβ分别为10.391、8.518。     

一个新的8-磺酰氨基喹啉衍生物与铜(Ⅱ)的显色反应及其应用

在 0 .1 mol/L Na2 B4 O7介质中 ,铜 ( )能与新合成的 8-磺酰氨基喹啉衍生物 5 -(3 -氟 -4 -氯苯基偶氮 ) -8-苯基磺酰氨基喹啉 (FCPBSQ)在室温下迅速发生反应 ,生成一配合比为 1∶ 2的有色配合物 ,其最大吸收波长位于 5 90 nm。研究了此反应的适宜条件 ,并建立了一个测定 Cu( )的光度分析新方法。在最佳条件下 ,Cu( )的浓度在 0～ 1 7.0μg/2 5 m L范围内符合比尔定律 ,其摩尔吸光系数为 6.92× 1 0 4 L· mol-1· cm-1。考察了 2 0多种共存离子的影响 ,大多数常见离子不干扰。本法已用于面粉及茶叶中铜的测定     

新型荧光试剂5-(4-溴苯偶氮)-8-(8-喹啉重氮氨基)喹啉的合成及其分析应用

将具有荧光特性的8-氨基喹啉结构与具有良好特性的三氮烯结构相结合,首次合成了标题化合物。其结构经过元素分析、红外光谱、核磁共振谱证实。研究表明,在碱性介质中,该试剂在λex/λem=416 nm/512 nm处产生强荧光,并且能被Cu2+荧光增强。基于此,建立了BPAQAQ测定Cu2+的新型荧光分析法。该方法的线性范围为1.4×10-8~1.0×10-5mol/L,检测限为1.1×10-8mol/L。将其应用于大米粉和小麦粉中Cu2+的测定,结果满意。     

镧三元配合物的合成及其抑菌活性

在常温下,以乙醇为溶剂,用肉桂酸、8-羟基喹啉和七水合氯化镧反应合成了镧的三元配合物,并对其进行络合滴定、摩尔电导率、元素分析、红外光谱、紫外光谱、热重-差热分析、氢谱等测试,推测其化学组成为LaL1(L2)2·H2O(其中,HL1为肉桂酸;HL2为8-羟基喹啉)。对其进行大肠杆菌、金黄色葡萄球菌、白色葡萄球菌、枯草芽孢杆菌和藤黄微球菌抑菌性能的测试,结果表明,镧离子、8-羟基喹啉和配合物均有抑菌活性。配合物抑菌效果明显优于其配体。     

8-羟基喹啉钇的合成与荧光性能研究

以8-羟基喹啉为配体,用金属离子Y3+作为中心离子制备8-羟基喹啉钇的金属配合物。然后逐个探究温度、物料比、p H值和反应时间四个影响因子对产物荧光的影响,进而得到了物料比(1∶1)、温度(80℃)、pH(8)、反应时间(2 h)的相对最佳实验条件。最后采用荧光分光度计、X射线衍射、红外吸收的方法对产物的荧光性能和结构进行了系统的研究。     

3,4-二氢-2(1H)喹啉酮衍生物的合成研究

对3,4-二氢-2(1H)喹啉酮衍生物1,2,3(R= NO2,NH2,OH;R= H,NO2,NH2)的合成进行了研究。以苯胺和3-氯丙酰氯为原料,制得N-苯基-3-氯丙酰胺,然后经环合得到3,4-二氢-2(1H)喹啉酮,再经由硝化、还原、重氮化水解合成了一系列3,4-二氢-2(1H)喹啉酮衍生物:6-硝基-3,4-二氢-2(1H)喹啉酮(1a),6,8-二硝基-3,4-二氢-2(1H)喹啉酮(1b),6-氨基-3,4-二氢-2(1H)喹啉酮(2a),6,8-二氨基-3,4-二氢-2(1H)喹啉酮(2b),6-氨基-8-硝基-3,4-二氢-2(1H)喹啉酮(2c),6-羟基-3,4-二氢-2(1H)喹啉酮(3a)和6-羟基-8-硝基-3,4-二氢-2(1H)喹啉酮(3b),其中化合物(2c)及(3b)为新化合物。单步产率均在86%以上,路线简单,操作简便,反应条件温和。采用MS,1HNMR对产品进行了定性及结构表征。     

双-8-羟基喹啉高分子配合物的合成与应用

用8-羟基喹啉在有相转移催化剂存在的碱性条件下,与氯仿作用合成5-甲酰基-8-羟基喹啉,然后将5-甲酰基-8-羟基喹啉分别与对苯二胺、联苯二胺,4,4＇-二氨基二苯砜反应,得到三种双-8-羟基喹啉-席夫碱配体,然后与金属离子配位,得到了一类新型的双-8-羟基喹啉-席夫碱-金属高分子配合物,再结合双-8-羟基喹啉-席夫碱配体与其它离子的显色反应,进行对比分析.利用红外光谱、紫外光谱对配体和配合物的结构进行表征,利用荧光光谱研究了高分子配合物的光致发光性能.     

新型喹啉Gemini表面活性剂的合成及界面吸附

以6-氨基喹啉，三光气，三乙胺为原料合成了对称的喹啉脲，通过其与三种溴代烷进行季铵化反应合成了喹啉双季铵盐，其结构经FT-IR，1H NMR，13CNMR和ESI-MS证实。对中间体喹啉脲及目标产物喹啉Gemini表面活性剂的合成条件进行了优化。合成中间体的反应条件为二氯甲烷做反应溶剂，n (6-氨基喹啉)∶n (三光气) = 5∶1，反应时间为6 h，收率可达88%。合成喹啉类Gemini表面活性剂的反应条件为DMF为反应溶剂，反应温度为110℃，n(中间体)∶n(溴代烷) = 1∶14，反应时间为8 h，收率可达74%。对目标产物喹啉Gemini表面活性剂在三氯甲烷-水体系中的界面张力进行了测定，结果表明：喹啉Gemini表面活性剂在三氯甲烷溶液内扩散到三氯甲烷-水界面是由纯扩散吸附控制的。     

新型荧光材料ZnLbipy·2H_2O的合成与表征

以二水合-[N,N′-双(2-苯胺基)乙二酰胺]合锌(II)和a、a′-联吡啶(bipy)为原料合成了一种新型荧光材料ZnLbipy·2H2O,并用元素分析、红外、紫外、核磁共振等进行了表征,通过对其荧光性能的研究,证明该化合物是一种较好的新型荧光材料。     

N，N，N-三（2-甲基苯并咪唑）胺氧钒配合物的合成、表征及光谱性质研究

本文用微波法合成了配体N,N,N-三（2-甲基苯并咪唑）胺,并以无水甲醇为溶剂,在常温条件下合成了配体与硫酸氧钒的配合物。通过红外光谱和元素分析对其结构进行了表征,并对其紫外吸收峰随pH值的变化及荧光性质进行了研究,结果表明配体在紫外光区吸收峰的强度随pH值的增大而降低,而配合物吸收峰的强度随pH值的增大先降低后增高,二者均发生红移;氧钒配位后使配体发生荧光猝灭。     

二苯乙烯基双苯并(口恶)唑类化合物的合成及光谱性能的研究

以对氰基氯苄为原料与取代的邻氨基苯酚反应,合成了标题化合物。测定了此类化合物的紫外光谱和荧光光谱,并以硫酸喹宁为参比标准测定了化合物的荧光量子产率。研究了分子结构与紫外光谱、荧光光谱的关系。     

N-乙酰半胱氨酸修饰CdTe量子点的合成及其用于二价铜离子检测的研究

利用"一锅法"合成N-乙酰半胱氨酸修饰的CdTe量子点,并利用紫外-可见分光光度法和荧光光谱法对其进行表征。根据CdTe量子点与Cu~(2+)反应发生荧光淬灭的原理来检测水体中Cu~(2+)的浓度。研究表明,CdTe量子点荧光淬灭程度与Cu~(2+)离子浓度有很好的线性关系,该方法检测Cu~(2+)离子的下限浓度为6.59×10~(-9)mol/L。本研究建立了一种灵敏快速测定Cu~(2+)的方法。     

DNA interaction and cytotoxic activity of copper complex based on tridentate hydrazone derived ligand and nitrogen donor heterocycle

Tetra coordinated copper(II) complex of formula [Cu(L¹)(imid)] is synthesized using imidazole and a tridentate O,N,O hydrazone ligand L¹ prepared by condensation of 1,1,1-trifluoropentanedione and 4-chlorobenzhydrazide. The ligand and complex are characterized by UV–Visible, FTIR, NMR, mass and single crystal XRD techniques. DNA binding mode is assessed by UV absorption, fluorescence spectral and circular dichroism studies. Based on the results, it is observed that complex has preferred intercalative mode of binding with DNA. The binding constant, K_b, was found to be 4.02 ± 0.09 × 10⁴ M^− 1. Thermodynamic parameters such as ΔH, ΔS and ΔG obtained from acridine orange fluorescence displacement assay revealed that the hydrophobic and hydrogen bonding interactions are playing a major role in the binding pattern. In addition, cytotoxicity of the complex towards MCF-7 breast cancer cell line has also been assessed.     

Synthesis,photochemical characterization,and thermal stability of a series of substituted formamidines as ultraviolet light absorbers

The three‐step reactions of ethyl 4‐aminobenzoate, formic acid, and halohydrocarbons afforded 10 N‐substituted‐N,N′‐diaryl‐formamidine derivatives ( F1 – 10 ) as ultraviolet absorbers. These N‐substituted formamidines were characterized by ¹H NMR, ¹³C NMR, FT‐IR, and ESI‐MS spectroscopies. The UV–vis absorbance and fluorescence properties of the compounds F1 – 10 were investigated in different solvents and in the presences of different metal ions. The effects of the amount of Al³⁺, Pb²⁺, Zr⁴⁺ ions on the UV–vis absorbance and fluorescence properties of compound F1 were also investigated. Moreover, the thermal stability of the compounds F1 – 10 was evaluated as well as the intermediate N,N′‐bis(4‐ethoxycarbonylphenyl)‐formamidine. J. VINYL ADDIT. TECHNOL., 25:E108–E113, 2019. © 2019 Society of Plastics Engineers     

Characterization of Mo Doped TiO2 and its Enhanced Photo Catalytic Activity Under Visible Light

Transition metal doping into the TiO₂ lattice can expand the response of these metal oxide nano particles to the visible region. In view of this, Mo⁶⁺ ion is doped into the TiO₂ lattice in order to understand the mechanism of its photo response. The prepared photocatalysts were characterized by X-ray diffraction, UV–Visible absorption spectroscopy, UV–Visible diffuse reflectance spectroscopy, SEM, EDX, FTIR and BET specific surface area techniques. The characterization results have confirmed the incorporation of metal ions into TiO₂ lattice. XRD analysis shows no change in crystal structure except a slight variation in crystallite size and elongation along the c-axis with increase in the concentration of the dopant. Diffuse reflectance measurements showed a shift in the band edge position to longer wavelengths and an extension of the absorption to the visible region. The photo degradation efficiencies of these catalysts were studied with Tebuconazole pesticide as model pollutant. Under UV light, undoped catalyst showed higher activity than doped catalyst. But in the case of visible light irradiation Mo doped TiO₂ with intermediate dopant concentration of 0.06 atom % had the highest photocatalytic reactivity. This may be due to the narrowing of band gap so that it could effectively absorb the light of longer wavelength. The degradation path way was followed by UV–Visible spectroscopy.     

苝四羧酸多联体化合物的合成及其光谱特性研究

本文合成了８个四羧酸多联体化合物;测定了这些化合物的吸收光谱、荧光光谱．研究了由供电子分子键连的多联体分子的光谱特性及其分子体系内稳态荧光猝灭机理．首次从吸收光谱和荧光光谱上分析和考察了四羧酸多联体化合物分子体系内的光致电子转移反应．     

一种新型Salen衍生物铜(Ⅱ)配合物的合成与表征

以无水乙醇为溶剂,1,2-二胺氧乙烷双缩3,5-二叔丁基水杨醛(H2L)与一水合乙酸铜反应,合成了一种新型Salen衍生物铜(Ⅱ)配合物。化合物经元素分析,1H NMR,IR,TG-DTA及UV等表征,结果表明,H2L是一种新型Salen型双肟类四齿配体,配合物的可能结构式为Cu(C32H46N2O4)。     

Novel aminated benzimidazo[1,2-a]quinolines as potential fluorescent probes for DNA detection: Microwave-assisted synthesis, spectroscopic characterization and crystal structure determination

A synthesis of novel benzimidazo[1,2-a]quinolines, substituted with piperidine, pyrrolidine and piperazine nuclei has been accomplished using an uncatalyzed amination protocol under microwave heating. All compounds were characterized by means of ¹H, ¹³C NMR, IR, UV/Vis and fluorescence spectroscopy. Crystal and molecular structures of 2-chloro- and 2-piperidinyl-benzimidazo[1,2-a]quinoline-6-carbonitrile were determined by X-ray diffractometry. These molecules are essentially planar. Their molecular assembly is characterized by the existence of weak intermolecular hydrogen bonds of C-H⋅⋅⋅N type and π-π aromatic interactions. The π-π aromatic stacking observed in the solid state structures of the 2-chloro- and 2-piperidinyl- derivatives are not analogous. The spectroscopic properties of these amino substituted benzimidazo[1,2-a]quinolines as their hydrochloride salts in the presence of ct-DNA were studied by means of fluorescence spectroscopy. Comparison of binding properties of amino substituted benzimidazo[1,2-a]quinoline hydrochloride salts to ct-DNA revealed significantly enhanced fluorescence emission intensity and thus offer the potential applications as a DNA-specific fluorescent probes.