基于醛基取代的氟硼二吡咯类荧光母体探针的合成及其应用

荧光探针具有灵敏度高、可实时检测、精准诊断与成像可视化等优点，被广泛应用于生物医药、信息存储、化学分析等领域。氟硼二吡咯（BODIPY）类荧光探针因其优异的光物理化学特性而被广泛设计与开发使用。该文综述了醛基取代的BODIPY荧光探针的分子设计策略和功能化应用，包括α位醛基BODIPY、β位醛基BODIPY、meso位醛基BODIPY和1,7-位醛基BODIPY的不同位点醛基调控的BODIPY荧光母体探针及其在阴离子检测、生物硫醇识别及细胞成像方面的研究进展。设计新型的醛基取代BODIPY荧光探针将在精准诊疗上具有巨大的发展空间。     

基于氟硼二吡咯亚甲基荧光探针的研究进展

氟硼二吡咯亚甲基(BODIPY)荧光染料具有易于修饰、高摩尔消光系数、高荧光量子产率、优异的光稳定性、对溶剂的极性和pH敏感性低等许多突出特性,被广泛用于有机小分子荧光探针的构建.综述了2019年以来BODIPY荧光探针在金属阳离子、阴离子、活性氧和生物硫醇等检测方面的研究进展,梳理了这些探针的设计思路,对比了它们的检...     

基于二氟化硼-二吡咯甲烷(BODIPY)染料类汞离子荧光探针的研究进展

Hg2+是一种极具生理毒性的化学物质,对人类和环境危害极大,其检测方法在化学传感器领域得到广泛研究。荧光探针法因具有检测灵敏度高、快速便捷等优点而成为Hg2+检测的重要手段之一。综述了近年来BODIPY类染料汞离子的研究进展,着重总结了Hg2+荧光探针的设计合成、性能及其检测机制;展望了该类荧光探针的研究方向。     

基于BODIPY的荧光探针检测活性氧的研究进展

活性氧(ROS)是一种重要的含氧化学活性物质，与各种生理过程密切相关。但过量的ROS可能会导致诸多疾病，如心血管疾病、神经退行性疾病甚至癌症等，因此有效的识别和检测ROS具有重要意义。氟硼二吡咯亚甲基(BODIPY)由于其独特的光物理性质、优异的光化学稳定性以及可行的衍生化，近年来被广泛应用于检测ROS。针对不同的活性氧进行分类，主要综述了近5年来国内外基于BODIPY荧光探针用于检测ROS的研究现状，并展望了BODIPY荧光探针检测ROS的发展方向，旨在为今后研究ROS在生理和病理过程中的作用提供一定的理论参考。     

比率型锌离子荧光探针的研究进展

比率型荧光探针通过内标的建立,扩大了荧光探针动态响应的范围,具有双波长发射、背景干扰小及可定量检测等优点,近年来,被广泛用于生命相关金属离子的定量检测。综述了近十年来比率型锌离子荧光探针的设计及成像应用,并展望了其在体内环境下锌离子的定量检测前景和发展方向。     

红光区双效发光材料BODIPY的制备及其光谱性质

通过吲哚衍生物与1,8-萘内酰亚胺缩合及氟硼化反应，得到meso位无取代和甲基取代的两种配体（Ⅰ、Ⅲ）及两种氟硼二吡咯（BODIPY）染料（Ⅱ、Ⅳ）。其结构和光学性能经NMR、HRMS、单晶、UV-Vis吸收光谱、荧光发射光谱和固体荧光光谱进行了表征。结果表明，meso位引入甲基后配体Ⅲ较配体Ⅰ的固体荧光发射峰红移了34 nm。BODIPY染料具有较强的双效荧光（溶液和固体荧光），其中BODIPY染料Ⅳ的溶液和固体荧光量子产率分别高达65.8%和76.3%，其固体荧光量子产率较meso位无取代BODIPY染料Ⅱ（14.6%）提高了4.2倍。BODIPY染料Ⅳ较强的双效发光可归因于其固体堆积方式中无C—H…π作用以及层与层之间存在的“头-尾”π-π堆积。不同于其他提高固态荧光的策略，在母体meso位引入小位阻甲基的策略使BODIPY具有双效红光发射性能，也丰富了双效有机发光材料的种类。     

新型氟硼二吡咯纳米粒子荧光探针的合成与性能

为了解决氟硼荧类染料(BODIPY)在肿瘤诊断中吸收波长短、水溶性和生物相容性差的问题,设计开发了2种吸收波长达到近红外区的BODIPY分子,并通过与DSPE-PEG2000-MAL-RGD(PC-RGD)自组装形成具有良好水溶性和生物相容性的纳米粒子.研究了纳米粒子的荧光成像能力,结果表明:单取代分子3a和双取代分子...     

Fe3+荧光探针的研究进展

综述了近几年来用于Fe~(3+)检测的荧光探针研究进展。重点介绍了以香豆素、罗丹明、氟硼二吡咯(BODIPY)作为荧光团的Fe~(3+)荧光探针,及部分其它类型铁离子荧光探针的结构和设计原理,概述了Fe~(3+)荧光探针在检测过程中的优点,并展望了Fe~(3+)荧光探针的研究和发展方向。     

BODIPY类荧光染料的研究进展

BODIPY(氟化硼二吡咯)类荧光染料作为一类新兴的荧光染料,因其良好的光物理性质,在过去的二十年内得到广泛的研究。对BODIPY的中心骨架进行官能化,可形成一系列衍生物用于环境监测和生物科学等领域研究。文章主要对近年来有关BODIPY的官能化及作为荧光探针、荧光标记、光敏剂的应用加以综述。     

基于二氟化硼-二吡咯甲烷(BODIPY)类染料的次氯酸荧光探针的研究进展

次氯酸(HCl O)作为一种生物体内关键的活性氧物种(ROS),在多种正常的生化功能和异常病理过程中扮演着非常重要的角色。因此,识别与实时准确地监测细胞内次氯酸在活动位点的浓度变化对于生物学研究和临床诊断极其重要。而在所有的检测方法中,荧光探针法由于其灵敏度高、选择性好、易于操作、实时可视化检测、原位检测、无损检测、响应时间快速、所需试剂量小等优点而引起广大科研工作者的兴趣并将其用于生物体内次氯酸的检测及其生理功能的研究。重点综述了近年来基于BODIPY类染料的次氯酸荧光分子探针的设计合成、检测机理及其在生物成像上的应用研究进展。     

Many Drugs of Abuse May Be Acutely Transformed to Dopamine,Norepinephrine and Epinephrine In Vivo

It is well established that a wide range of drugs of abuse acutely boost the signaling of the sympathetic nervous system and the hypothalamic–pituitary–adrenal (HPA) axis, where norepinephrine and epinephrine are major output molecules. This stimulatory effect is accompanied by such symptoms as elevated heart rate and blood pressure, more rapid breathing, increased body temperature and sweating, and pupillary dilation, as well as the intoxicating or euphoric subjective properties of the drug. While many drugs of abuse are thought to achieve their intoxicating effects by modulating the monoaminergic neurotransmitter systems (i.e., serotonin, norepinephrine, dopamine) by binding to these receptors or otherwise affecting their synaptic signaling, this paper puts forth the hypothesis that many of these drugs are actually acutely converted to catecholamines (dopamine, norepinephrine, epinephrine) in vivo, in addition to transformation to their known metabolites. In this manner, a range of stimulants, opioids, and psychedelics (as well as alcohol) may partially achieve their intoxicating properties, as well as side effects, due to this putative transformation to catecholamines. If this hypothesis is correct, it would alter our understanding of the basic biosynthetic pathways for generating these important signaling molecules, while also modifying our view of the neural substrates underlying substance abuse and dependence, including psychological stress-induced relapse. Importantly, there is a direct way to test the overarching hypothesis: administer (either centrally or peripherally) stable isotope versions of these drugs to model organisms such as rodents (or even to humans) and then use liquid chromatography-mass spectrometry to determine if the labeled drug is converted to labeled catecholamines in brain, blood plasma, or urine samples.     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

ICP-MS法测定地球化学样品中As、Cr、Ge、V等18种微量痕量元素的研究

建立了测定地球化学样品中包括As、Cr、Ge、V等18种微量、痕量元素的ICP-MS方法。地化试样用HF-HNO3混酸分解后,以1 1 HNO3溶解干渣。由于制样不使用盐酸,避免了Cl对As、Cr、Ge、V的质谱干扰。用国家一级地球化学标准物质GBW 07309制备溶液优化仪器工作参数,并用于校准。方法测定限(6s)为:0.007~6.4μg/g,精密度(RSD%,n=12)为:29%~9.4%,经过国家一级地球化学标准物质的分析验证,结果与标准值吻合。方法已应用于国土资源调查的试样分析。