2,3-二苯基苯并二氢吡喃并[4,3-c]-2-吡唑啉衍生物的合成及光学性质研究

以对位取代的苯酚为起始原料,经过与丙烯腈的加成、水解、分子内酰基化以及与苯甲醛的羟醛缩合反应而生成查尔酮,再与苯肼反应得到3个苯并二氢吡喃并[4,3-c]-2-吡唑啉衍生物,并利用 1HNMR、13CNMR谱和MASS分析进行了结构确认.对所合成的3个化合物,测定了荧光光谱,结果显示这3个化合物均具有蓝色荧光性能;而且对化合物6a在不同酸性条件下的荧光性能进行测试,结果显示随着酸性的增加,荧光强度明显减小.     

1,5-二芳基-1,4-戊二烯-3-酮衍生物的合成及其荧光光谱研究

以取代苯甲醛和丙酮为原料,改进文献合成方法,采用一锅法合成了5个对称和5个不对称取代双苄叉丙酮化合物,通过红外光谱、核磁共振谱、质谱对其进行了结构表征,利用分子荧光光谱法研究了该类化合物与人血清蛋白的相互作用,并测定了对蛋白猝灭效果较好的二对二甲氨基双苄叉丙酮的猝灭常数。     

卟啉化合物的研究 ⅩⅢ.取代四苯基卟啉蒽醌化合物的合成和光谱性质研究

本文报道了一组取代四苯基卟啉蒽醌化合物的合成和光谱性质研究,并根据波谱数据和各化合物荧光猝灭程度的不同,讨论了化合物的结构以及取代基,卟啉和蒽醌之间的距离对分子内电子传递产生影响的内在因素。     

联苯类液晶环氧树脂的合成研究

采用二步法合成液晶环氧树脂,首先合成含有刚性棒状介晶基元的联苯类环氧预聚体,将介晶基团通过共价键接入环氧树脂网络,再通过固化反应得到高度交联的液晶热固性树脂.探讨了固化剂及碱的用量、反应温度等对合成液晶的影响,利用IR与DSC等分析手段对合成的单官能团液晶环氧化合物（SCEP）和液晶环氧树脂进行结构表征,结果表明合成的物质为低分子液晶环氧化合物.     

克酮酸并二喹喔啉类荧光分子的合成

文章利用五方酸与邻苯二胺进行脱水缩合反应,获得一个由五元环与两个喹喔啉环并环组成的具有刚性共轭分子,通过后期维尔斯迈尔-哈克反应进行结构修饰,提高分子在有机溶剂中的溶解性,并对该化合物的单晶结构,红外光谱以及荧光性质进行了表征。     

含咔唑基团芘类荧光材料的合成与发光性质

以1-溴芘、1,6-二溴芘和9-对乙炔苯基咔唑为原料,通过Sonogashira偶联反应合成了1-[4-(9-咔唑)苯乙炔基]芘和1,6-二[4-(9-咔唑)苯乙炔基]芘两种荧光分子。经熔点、核磁共振氢谱以及元素分析等结构表征,对中间体和目标产物的紫外-可见吸收、荧光发射以及结构与性质之间的构效关系进行了研究。通过结构修饰,可有效调节此类分子的吸收及发射性质。当芘单元作为中心电子受体,以4-苯乙炔基为桥连基,引入咔唑基团作为电子给体时,其分子共轭程度、结构刚性和分子内电荷转移能力显著提高。相对于D-π-A结构的单取代化合物,双取代D-π-A-π-D结构分子的最大发射峰由422 nm红移至446 nm,荧光量子效率由0.64提升至1.08。该类化合物可作为高效的蓝光荧光材料,应用于有机光致/电致发光材料以及有机发光二极管等领域。     

含咔唑基团芘类荧光材料的合成与发光性质

以1-溴芘、1,6-二溴芘和9-对乙炔苯基咔唑为原料,通过Sonogashira偶联反应合成了1-（4-（9-咔唑）苯乙炔基）芘和1,6-二（4-（9-咔唑）苯乙炔基）芘两种荧光分子。经熔点、核磁共振氢谱以及元素分析等结构表征,对中间体和目标产物的紫外-可见吸收、荧光发射以及结构与性质之间的构效关系进行了研究。通过结构修饰,可有效调节此类分子的吸收及发射性质。当芘单元作为中心电子受体,以4-苯乙炔基为桥连基,引入咔唑基团作为电子给体时,其分子共轭程度、结构刚性和分子内电荷转移能力显著提高。相对于D-π-A结构的单取代化合物,双取代D-π-A-π-D结构分子的最大发射峰由422 nm红移至446 nm,荧光量子效率由0.64提升至1.08。该类化合物可作为高效的蓝光荧光材料,应用于有机光致/电致发光材料以及有机发光二极管等领域。     

新型偶氮苯共轭席夫碱化合物的合成与表征

以对苯二甲醛与偶氮苯胺基化合物进行缩合反应合成系列新型具有不同取代基的含有偶氮苯共轭基团的席夫碱化合物。利用紫外光谱、红外光谱以及荧光光谱研究了目标产物的取代基效应,并用差热-热重分析方法对其热稳定性能进行测定。实验数据表明,对于分子内取代基团、共轭体系等因素的调控,可以得到性能迥异的席夫碱化合物,在功能材料等领域具有广泛的应用价值。     

2-(2-羟苯基)-1H-苯并咪唑系列化合物的合成及光谱性质研究

以2-硝基苯胺或取代2-硝基苯胺为初始原料,利用保险粉直接还原缩合"一锅法"合成目标产物2-(2-羟苯基)-1H-苯并咪唑系列化合物。测试了该类化合物荧光性质及紫外光谱性质,发现了化合物具有较强荧光性质,研究了其荧光、紫外光谱的变化规律,探讨了各取代基对化合物荧光及紫外性质的影响。     

双噁嗪化合物的合成及其电子光谱

本文合成了六个双(?)嗪化合物,测试了它们的吸收与荧光光谱,并计算了它们的荧光量子产率。双(?)嗪化合物的分子平面性及刚性都较强,其吸收光谱与荧光光谱呈较好的镜象对称性。     

The synthesis,two-photon absorption and blue upconversion fluorescence of novel,nitrogen-containing heterocyclic chromophores

Novel, nitrogen-containing heterocyclic chromophores based on either 1,2,4-triazine or an imidazole core were synthesized using a three-component, one-pot reaction under microwave irradiation. Structures were verified by ¹H NMR, IR, MS and elemental analyses while crystal structure was determined using X-ray diffraction. The two-photon absorption and two-photon upconverted blue fluorescent emission characteristics were investigated experimentally; preliminary structure–photophysical property relationships were established. Chromophores that contained the imidazole moiety displayed more potent two-photon absorption than compounds based upon 1,2,4-triazine and also exhibited a strong two-photon upconverted blue fluorescent emission peak at around 443–476 nm. Significant enhancement of the two-photon absorption cross-section was achieved by fusing a benzoxazole moiety onto the phenanthro[9,10-d]imidazole ring.     

Evaluation of non-toxic corrosion inhibitors for copper in sulphuric acid

The aim of this paper is to study influence of the molecular structure on the inhibiting properties of organic compounds in corrosion processes in acid media. The inhibiting efficiency of non-toxic imidazole derivatives on copper corrosion in sulphuric acid is investigated. The investigation is performed using electrochemical methods of potentiodynamic polarisation as well as gravimetric measurements. The results of the investigation show that the inhibiting properties of substituted imidazoles depend on molecular structure. The best protection (93%) is obtained by adding a phenyl ring to the imidazole structure. The values of standard free energies of adsorption, as calculated from the Freundlich isotherm, indicate that in the presence of sulphuric acid imidazole derivatives adsorb on copper by a physisorption-based mechanism.     

苯并咪唑基芳醛化合物的合成及其荧光性质研究

以带有取代基的水杨醛和各种带有取代基团的邻苯二胺为原料,合成了7种具有荧光性能的苯并咪唑基芳醛化合物。改进了实验方法,收率提高了20%左右。并使用核磁对产品进行了表征,研究其荧光性能。以2-(2-羟基苯基)苯并咪唑为对照,发现在不同位置引入醛基后荧光均有减弱,其中在苯并咪唑环上连有醛基使荧光强度明显减弱。并发现各种取代基团对苯并咪唑基芳醛化合物的荧光性能均有影响,其中硝基的消光作用明显。实验结果为进一步实验提供了重要的实验依据。     

Synthesis,NMR Spectral and DFT Studies of Styryl Imidazole Derivatives—Nano-SiO2 as an Efficient Catalyst

A series of novel styryl imidazole derivatives has been designed and synthesized using nano-SiO₂ as an efficient catalyst. Synthesized compounds have been characterized by ¹H and ¹³C-NMR spectral studies. The significant features of this nanocatalyst are high product yield, short reaction times and a vast range of substrates usage. Proton and ¹³C chemical shifts of the synthesized compounds were calculated. Single crystal XRD analysis has been carried out to confirm the structure of MDPI (1-(3-methoxyphenyl)-4, 5-dimethyl-2-phenyl-1H-imidazole) and it shows the imidazole ring is essentially planar and triclinic crystal. Optimization of compound MDPI was performed by DFT at B3LYP/6-31G (d, p) using Gaussian-03. Imidazole derivatives were used to construct highly sensitive fluorescent chemosensors for sensing of metal ions.

     

唑类含能离子化合物的合成研究进展

综述了以咪唑、三唑、四唑以及五唑等唑类化合物为母体的一些含能盐的合成,系统总结了这类新型含能材料的熔点、密度、生成焓等理化性能以及爆轰性能,并分析了分子结构及取代基对含能盐性能的影响。对唑类含能盐在火炸药和推进剂等方面的应用进行了展望。附36篇参考文献。     

基于芘并咪唑的电致发光材料的性质分析

芘并咪唑是一种高效有机磷光材料,新型芘并咪唑化合物近几年已成功用于有机电质发光二极管制作模块。以芘并咪唑为原料,分析了基于芘并咪唑的电致发光材料的合成原理及合成办法。并利用元素分析、X射线单晶衍射、波谱等方法,分析了基于芘并咪唑的电致发光材料的结构表征。并对基于芘并咪唑的电致发光材料的光物理性质进行了探究。     

新型染料BOPIM的制备及光谱性能测试

以2-醛基吡啶和邻苯二胺为起始原料,经两步反应合成了新型的BOPIM(Boron 2-(2-pyr-idyl)imidazole complex)荧光染料,并通过1 H NMR,13C NMR,高分辨质谱进行了结构鉴定。对该化合物的紫外-可见吸收及荧光光谱测试表明:该染料有较高的荧光量子产率,相对较大的Stokes位移;且荧光性能呈现明显的溶剂效应。     

Studies on thermal behavior of imidazole diamine based benzoxazines

The objective of the present work is to develop a novel type of structurally modified benzoxazines with improved performance characteristics using imidazole core based diamine with formaldehyde and different types of phenolic compounds in order to utilize them for high‐performance applications. In this work, an attempt has been made to bring down the polymerization temperature of the benzoxazine monomers, which is one of the most deficient factor restrict the applications of benzoxazines, when used in the form of adhesives, sealants, encapsulants, and matrices with other substrates, though they possess numerous advantages and valuable properties than those of other available thermosets. In this context, in this study, two approaches have been adopted to bring down the polymerization temperature, viz., (i) the development of structurally modified benzoxazine monomers with imidazole core and (ii) an incorporation of varying nature of chemical compounds as catalysts, to lower the polymerization temperature and to enhance the thermal stability and char yield. Three types of benzoxazines were developed using imidazole core based diamine with monohydric phenols and formaldehyde, at appropriate conditions. The molecular structure of benzoxazines was confirmed from Fourier transform infrared spectroscopy and ¹H‐nuclear magnetic resonance analysis. From data, it was observed that the imidazole diamine based benzoxazines prepared from 1‐naphthol exhibits lower curing temperature of about 192 °C than that of other samples studied in this work. In addition, the influencing effect of catalysts viz., 4‐hydroxy acetophenone, 4‐hydroxy benzaldehyde, 4‐hydroxyphenyl maleimide, and thiodipropionic acid (TPA) on thermal properties of benzoxazines also was studied. Among the catalysts, it was found that the TPA is the most efficient catalyst. In the case of imidazole diamine based benzoxazines prepared from cyanophenol, the TPA reduces value of polymerization temperature (T_p) from 217 to 167 °C. The thermogravimetric analysis indicates that thermal stability of the benzoxazines are improved to a significant extent when 10 wt % catalysts were incorporated into the system. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 46562.     

1-咪唑基异喹啉衍生物的合成与表征

以2-炔基苯甲醛肟和咪唑类化合物为原料,利用串联反应合成两种未曾报道的1-咪唑基异喹啉化合物,所得目标产物均经1HNMR、13CNMR、HRMS确认。     

Synthesis and fluorescence properties of novel benzoxazole‐ and chromone‐functionalised bis(arylvinylene)imidazoles

Novel benzoxazole‐ and chromone‐functionalised bis(arylvinylene)imidazoles were synthesised and characterised by proton nuclear magnetic resonance, Fourier Transform–infrared, mass spectrometry and elemental analyses. These dyes were found to exhibit two quite different types of fluorescence behaviour in the alkali examined; i.e. fluorescence quenching for the benzoxazole–imidazole hybrids and fluorescence enhancement for the chromone–imidazole hybrids. The benzoxazole‐based imidazoles emit intense green fluorescence, but the fluorescence is remarkably quenched upon addition of alkali. Such a process can be reversibly controlled by simple deprotonation/protonation of the imidazole group; thus, they exhibit efficient fluorescence on/off switchable behaviour. In contrast, significant fluorescence enhancement is observed for the chromone–imidazole hybrids in the presence of alkali. Without alkali, these imidazole dyes are very weakly fluorescent, whereas the addition of alkali leads to an appearance of strong blue fluorescence and a dramatic increase of emission intensity.