Synthesis,Spectroscopic Properties,and Biological Applications of Eight Novel Chlorinated Fluorescent Proteins-labeling Probes

Eight novel chlorinated fluorescent proteins-labeling probes with a linker and reactive group were prepared in 7 steps by the reaction of chlorinated resorcinols with 3, 6-dichloro-4-carboxyphthalic anhydride in the presence of methanesulfonic acid. Structures of target compounds and intermediates were determined via IR, MS, ¹H NMR and element analysis. The spectral properties of the chlorinated fluoresceins were studied. These fluorescent probes showed absorbance peaks at 508–536 nm and fluorescence peaks at 524–550 nm. It was found that they have absorption and emission maxima at long wavelengths and high fluorescence quantum yields. Emission spectra of chlorinated fluoresceins shifted towards long wavelength with increase in chlorine. The probes were used for fluorescence imaging of cells in order to investigate whether they can conjugate to cells. The fluorescence imaging of living cells showed that they were localized in cell nucleus. However, they were localized in cytosol of chemically fixed cells. These probes will be useful reagents for the preparation of stable fluorescent conjugates.     

Synthesis and Spectroscopic Properties of Novel Fluorescent Compounds Containing Bis-pyrazole Ring

A series of pyrazoline derivatives containing pyrazole group were synthesized and characterized by means of ¹H NMR, FT-IR, MS and elemental analysis, and their UV–vis absorption behavior and fluorescent properties were also measured. Moreover, the influence of metal ions on spectral properties of synthetic products was examined with compound A ₅ as an example. It has been found that all synthetic pyrazoline derivatives show two remarkable absorption peaks at about 260 and 360 nm and the maximum emission peak at 445–467 nm. Especially, the joined of Co²⁺ can quench the fluorescence of compound A ₅ obviously.     

脂肪醇甲酸酯类酞菁铜配合物的合成、表征及荧光性能

报道了四甲酰氯酞菁铜的合成及其与反应得到正丁醇、正戊醇、正己醇、正辛醇、正十二醇5个含脂肪链取代基的酞菁铜衍生物.分别用红外光谱、紫外-可见光谱、元素分析、核磁共振氢谱等方法对这些衍生物进行了结构和取代度的表征,并研究了该系列酞菁铜衍生物在有机溶剂中的溶解性及荧光性能与浓度、取代基的关系.研究结果表明在一般有机溶剂中这些酞菁铜衍生物的溶解性显著提高,荧光强度不随浓度的变化而线性变化、长链要高于短链取代酞菁铜衍生物的荧光强度.     

Characterization of Milled High-Pressure High-Temperature NV-Center Nanodiamonds for Single-Photon Source Applications

Journal of Russian Laser Research - The color centers in nanodiamonds are promising candidates for the fabrication of stable room-temperature sources of single photons. We investigate the...     

Synthesis and Chiral Recognition Properties of Novel Fluorescent Chemosensors for Amino Acid

The charge neutral chiral optical sensors 1a∼d containing thiourea and amide groups were synthesized by simple steps in good yields and their structures were characterized by IR, ¹H NMR, ¹³C NMR, MS spectra and elemental analysis. The enantioselective recognition for α-phenylglycine and phenylglycinol was examined by fluorescence emission and UV-vis spectra. The fluorescence and UV-vis spectra changes of 1a were obvious when the enantiomers of α-phenylglycine anion were added, which exhibited that 1a has good enantioselective recognition ability towards α-phenylglycine. Electronic supplementary material  The online version of this article (doi:) contains supplementary material, which is available to authorized users.     

邻,间,对甲基丙烯酰胺基苯甲酸的合成、表征及荧光性能的研究

用邻氨基苯甲酸(o-ABA),间氨基苯甲酸(m-ABA),对氨基苯甲酸(p-ABA)和甲基丙烯酰氯为原料合成了邻甲基丙烯酰胺基苯甲酸(o-MAABA),间甲基丙烯酰胺基苯甲酸(m-MAABA)和对甲基丙烯酰胺基苯甲酸(p-MAABA),通过1H NMR,元素分析确认了其结构.详细考察了所得化合物的荧光性能,发现o-MAABA和p-MAABA在358 nm处有最大激发波长,而m-MAABA则在324 nm处,它们在最大激发波长下的发射波长都位于420nm左右的蓝光区域,o-MAABA强度最强,p-MAABA最弱.     

Synthesis and Characterization of a Fluorescent Water-Borne Polyurethane Based on a Novel Naphthalimide Dye

A waterborne-polyurethane (WPU) dye, based on the fluorescent dye 4-diamino propane-N-allyl-1,8- naphthalimide (WPU-DAN), was synthesized by attaching 4-diamino propane-N-allyl-1,8- naphthalimide (DAN) onto both ends of the polyurethane (PU) chains according to a prepolymer?ionomer process. The synthetic process was confirmed by Fourier transform infrared spectroscopy (FTIR) and UV-visible absorption. The glass transition temperature, molecular weight and average particle sizes were measured. The glass transition temperatures of WPU and WPU-DAN were 46.6 and 49.8°C, respectively. In addition, the particle size distributions of WPU-DAN and WPU were 140 and 134 nm, respectively. The thermal behaviour of WPU-DAN showed improvement compared to WPU. The fluorescence intensity of WPU-DAN was enhanced more than DAN due to the naphthalimide groups attached to the chains, and the fluorescence intensity of WPU-DAN and DAN were increased by increasing temperature. Moreover, the fluorescence intensity of WPU-DAN emulsion was stable during 30 days and no loss of fluorescence intensity occurred for these days.     

新型吡唑啉类荧光化合物的合成及光谱分析

吡唑啉衍生物作为荧光增白剂具有优良的性质,已被广泛应用于染料工业。根据Schellhammer化学结构与荧光性的经验,在吡唑啉环的1-位引入苯并噻唑基,3-位引入吲哚基,5-位引入苯基衍生物,设计并合成了六种新的吡唑啉衍生物,并且通过红外光谱、1H NMR谱、质谱和元素分析进行了确证。化合物的荧光性能测定结果显示此类化合物具有良好的荧光性,均可吸收353 nm左右紫外光,最大发射波长在430～443 nm之间,是一类很有发展前途的蓝紫色荧光化合物。荧光最大发射波长和荧光强度与取代基有关,在苯并噻唑上引入6-Br基团,化合物的荧光发射波长发生蓝移,且强度增大;而引入CH₃基团,化合物的荧光发射波长发生红移,且强度降低。取代基和溶剂极性对荧光量子产率的影响较小。荧光相对强度与荧光量子产率没有直接关系。     

ZnS Nanostructures: Synthesis,Properties, and Applications

Zinc sulfide (ZnS) nanostructures have attracted increasing attention due to their potential application in both conditional optical devices and new generation of nano-electronics and nano-optoelectronics because of their special structure-related chemical and physical properties. In this article, beginning with the synthesis of ZnS nanostructures with various original morphologies, we summarize the state-of-art research progresses on ZnS nanostructures. This is followed by the recent progresses on the improvement of their properties, especially the novel potential applications. We highlight the recent achievements on photoluminescence, photocatalysis, light-emitting diodes (LEDs), field-effect transistors (FET), sensors, dye-sensitized solar cells, and field emission (FE) based on ZnS nanostructures. Finally, we present an outlook on the future development of ZnS nanostructures.     

Carbon Nanotubes: Synthesis,Properties, and Applications

The goal of this article is to provide an updated and in-depth review of some of the most exciting and important developments in the processing and properties of carbon nanotubes. Nanotubes can be formed in various structures using several different processing methods. The synthesis methods used to produce specific kinds of nanotubes are discussed and a comparison is made between the methods used by researchers and industrial producers. This is followed by an overview and discussion of what makes carbon nanotubes interesting to so many: their mechanical, chemical, electrical, thermal, and optical properties. The article ends with a discussion of the future outlook for the study of carbon nanotubes.     

新型高分子蓝色荧光材料的制备及性能

以吡唑啉为发光功能基团,设计并合成了4种新的聚酰胺类高分子化合物,采用核磁共振氢谱(H 1NMR)和凝胶色谱(GPC)对其结构进行了确证。进而测定了高分子化合物的液体及固体荧光激发、发射光谱,高分子J1,J2和J3具有良好的液体及固体荧光发光能力。所制备的高分子材料具有良好的成膜能力、成本低廉、热稳定性好,有望在电致发光器件中广泛应用。     

Synthesis and Characterization of a Novel Self-colored Fluorescent Polycarbonate Urethane based on the 1,8-Naphthalimide Group

Abstract

The synthesis of a novel self-colored polyurethane (PU) is described using 4-amino-N-propanoic acid-1,8-naphthalimide dye. To synthesize the self- colored PU, the dye was added to the PU prepolymer at the chain extension step. PU and self-colored PU were characterized by using Fourier transform infrared spectroscopy (FTIR), UV-visible spectroscopy and Fluorometry. The thermal behavior of the PU and self-colored PU were investigated by differential scanning calorimetry (DSC). The spectra indicated that the addition of dye to the polymer chain did not affect the glass transition temperature (T_g?=?-39?°C). Tensile strengths and Young’s modulus of the samples were assessed using a tensile strength test; they revealed that addition of the dye to the polymer structure enhanced the Young’s modulus and increased the mechanical strength of the PU. X-ray diffraction (XRD) was used for evaluation of the crystal phase of the polymer; it revealed that both components were amorphous.     

新型荧光功能单体2,4-二甲基-7-丙烯酰胺基-1,8-萘啶的合成及其光谱特性

设计合成了可与DNA碱基通过氢键选择性结合的新型荧光功能单体2,4-二甲基-7-丙烯酰胺基-1,8-萘啶(DMAAN)。其反应原理是,2,6-二胺基吡啶与乙酰丙酮在磷酸介质中反应生成中间产物2,4-二甲基-7-胺基-1,8-萘啶(DMAN)。 DMAN与丙烯酰氯在三乙胺存在下,于氯仿溶剂中反应即可得到熔点为239～241 ℃的产物。采用1H核磁共振波谱、质谱、紫外-可见光谱对中间产物DMAN和目标化合物DMAAN进行了光谱表征,并进一步研究了其荧光光谱特性。     

新型呋喃基取代卟啉的合成及荧光性能

利用呋喃甲醛与二(3,4-二甲基吡咯)-芳基甲烷在醋酸中加热回流的方法,合成了6种新型2,3,7,8,12,13,17,18-八甲基-5,15-二芳基-10,20-二呋喃基卟啉化合物,其结构均经UV-Vis、IR、1HNMR确证.这些化合物均能发射较强的红光.     

新型PVA荧光凝胶的制备及光物理性能研究

为了开发一系列能够在纯水介质中使用的荧光凝胶材料,以TbCl_3·6H_2O和乙酰丙酮(ACAC)为初始原料合成了铽配合物Tb(ACAC)_3·2H_2O,并对其结构进行了表征。然后将铽配合物Tb(ACAC)_3·2H_2O以不同的质量分数引入到PVA基质中,在交联剂硼酸的作用下形成荧光凝胶。利用FTIR、PL、DSC、TGA等对其结构、发光性能及其热性能进行了研究。FTIR结果表明,铽配合物成功地掺杂到了PVA凝胶体系中。荧光发射光谱表明,所有铽配合物的PVA荧光凝胶都具有很好的荧光性能,更重要的是掺杂了3%、5%、7%铽配合物的PVA荧光凝胶位于545 nm处的特征发射峰的发射强度相比于小分子铽配合物Tb(ACAC)_3·2H_2O的发射强度更高,分别是其2.15、3.27和5.65倍。表明PVA基质对铽配合物具有较好的敏化作用。此外,DSC和TGA研究结果表明,铽配合物的引入使得PVA凝胶的热稳定性略有下降,但影响不大。     

非荧光硫化锌纳米簇的合成与表征

合成硫化锌纳米簇并对其进行表征, 建立一种利用硫化锌纳米簇的阳离子交换(CX)反应检测痕量生物分子的方法。采用水热法合成非荧光硫化锌纳米簇(NCCs)并对其进行表征。纳米簇的性能直接影响检测结果。通过透射电镜图像和X射线衍射可知, 纳米簇是多孔的, 可以通过快速阳离子交换反应从纳米簇中释放大量的Zn2+, 在锌响应试剂的作用下产生荧光信号进行荧光检测。其晶体的外部比内部排列松散, 有利于快速阳离子交换, 其晶体尺寸大小与加热时间有关。通过比表面积检测法测定纳米簇的表面积和孔径表明, 最小的纳米簇拥有相对较大的表面积及较高的阳离子交换效率。实验了三种释放方法(酸溶解法、阳离子交换法和微波辅助阳离子交换法)对Zn2+释放性能的影响, 结果表明, 微波辅助阳离子交换法信噪比较高, 操作简便, 可用于硫化锌纳米簇免疫测定法中。比较了Zn2+的释放效率和目标结合力与平均直径之间的关系, 结果表明纳米簇尺寸为44 nm时表现出最高的阳离子交换效率。结论: 所有这些特点, 使ZnS纳米簇阳离子交换放大器在痕量生物分子检测方面成为高度灵敏、生物相容性好、低廉环保的检测工具。     

非荧光硫化锌纳米簇的合成与表征

合成硫化锌纳米簇并对其进行表征,建立一种利用硫化锌纳米簇的阳离子交换(CX)反应检测痕量生物分子的方法。采用水热法合成非荧光硫化锌纳米簇(NCCs)并对其进行表征。纳米簇的性能直接影响检测结果。通过透射电镜图像和X射线衍射可知,纳米簇是多孔的,可以通过快速阳离子交换反应从纳米簇中释放大量的Zn2+,在锌响应试剂的作用下产生荧光信号进行荧光检测。其晶体的外部比内部排列松散,有利于快速阳离子交换,其晶体尺寸大小与加热时间有关。通过比表面积检测法测定纳米簇的表面积和孔径表明,最小的纳米簇拥有相对较大的表面积及较高的阳离子交换效率。实验了三种释放方法(酸溶解法、阳离子交换法和微波辅助阳离子交换法)对Zn2+释放性能的影响,结果表明,微波辅助阳离子交换法信噪比较高,操作简便,可用于硫化锌纳米簇免疫测定法中。比较了Zn2+的释放效率和目标结合力与平均直径之间的关系,结果表明纳米簇尺寸为44 nm时表现出最高的阳离子交换效率。结论：所有这些特点,使ZnS纳米簇阳离子交换放大器在痕量生物分子检测方面成为高度灵敏、生物相容性好、低廉环保的检测工具。