吡啶基卟啉的合成及表征

卟啉类的化合物将广泛应用于我们的日常生活中。卟啉化合物是由于其特殊的生物学意义和能够应用于人工光合作用,非线性光学零件及传感器等而产生的。人们正在广泛研究它的优化合成及应用方面,如新型手性卟啉结合锌等金属元素后,具有对半胱氨酸的特殊识别作用。本文合成了一种吡啶基卟啉化合物1,并通过核磁共振谱、荧光光谱和紫外光谱等手段对其进行了表征。     

Fmoc保护氨基酸-卟啉化合物的设计合成与光谱性能研究

为了获得结构和性能更加接近天然卟啉的合成卟啉化合物,采用Fmoc保护氨基酸(甘氨酸、缬氨酸、L-酪氨酸),将氨基酸引入卟啉体系,设计合成了系列新型卟啉-氨基酸化合物,并对其光谱性能进行了研究。结果表明,在合成以酯键相连的卟啉-氨基酸化合物时,甘氨酸、缬氨酸反应生成含有2个氨基酸单元的化合物,L-酪氨酸生成含1个氨基酸单元的化合物。在合成以酰胺键相连的化合物时,反应得到含有1个氨基酸单元的化合物。卟啉的光谱性能不因不同Fmoc保护氨基酸单元的引入而改变。     

天然和人工合成卟啉化合物在抗肿瘤方面的应用现状及进展

论述了天然及人工卟啉的结构、性质以及在抗肿瘤方面的应用现状,并对其发展前景作了展望.     

溶液自组装法制备卟啉纳米材料研究进展

在溶液中,利用自组装方法制备以卟啉化合物为基础的纳米材料具有优良的光物理和光化学性质,在分子器件和人工模拟光合作用等方面具有巨大的应用前景,是目前的研究热点。本文详细介绍了单卟啉组装方法和多卟啉共组装方法,单卟啉组装包括双溶剂法和表面活性剂辅助法两类方法。简要介绍了卟啉自组装纳米材料在集光天线和光催化方面的应用。目前,自组装方法制备的卟啉化合物纳米材料已经出现了丰富的形态,但仍存在不足,即自组装作用机理有待深入研究,且如何将卟啉纳米材料的制备工艺放大并应用于实际,还有待进一步发展。     

偶氮羟基卟啉-噁二唑化合物的合成与光谱性能

合成了系列偶氮羟基卟啉-噁二唑化合物,通过1HNMR,FAB-MS,IR,UV-Vis确定了化合物的结构。核磁氢谱中远低场处(δ:13.0-16.0)醌腙体上亚胺基质子的出现及原料羟基卟啉羟基质子的消失表明,这些偶氮羟基卟啉-噁二唑化合物中存在着偶氮体和醌腙体的互变异构;红外光谱中1 725 cm-1附近CO强吸收的出现及3 400 cm-1附近的羟基伸缩振动峰的几乎消失表明,两种异构体中以醌腙异构占绝对优势。对合成化合物进行了光谱性能测定,实验结果表明,基态下,分子中噁二唑基团与卟啉基团相对独立,没有相互作用;而在激发态下,卟啉-噁二唑分子内存在着强烈的相互作用。该文报道了4种化合物的瞬态吸收光谱,为进一步研究卟啉-噁二唑分子激发态行为提供了参考。     

系列尾式卟啉化合物的合成及光电性质研究

卟啉化合物是一类具有共面的18π电子共轭大环体系化合物,其卟啉环上可引入各类取代基,并能与多种金属配位。设计合成了3种带有不同取代基的甲基丙烯酰氧基修饰的尾式卟啉配体,并以有机金属盐法、苯甲腈法合成了与其对应的金属锌、铂配合物。通过红外光谱、核磁共振氢谱和UV-Vis光谱等对卟啉化合物的结构进行表征,证实了所合成的化合物为目标产物,并系统研究了卟啉化合物在二氯甲烷溶剂中的荧光性质与电化学性质。实验结果表明,通过改变卟啉苯环上取代基的种类及中心金属配位,可以对卟啉化合物的光学性质和电化学性质产生明显的影响。     

天然水环境中光化学反应体系概述

天然水环境中含有多种天然和人工化合物,阳光辐射下会发生各种光化学反应,影响水中各种天然和人工化合物的迁移转化以及水生生物。本文主要介绍了天然水环境中光化学反应体系的研究,包括铁(Ⅲ)反应体系、亚硝酸根和硝酸根反应体系、腐殖质反应体系三种,并对三种体系在环境污染物治理方面的应用和发展前景进行展望。     

新型卟啉化合物的合成应用新进展

简要介绍了卟啉类化合物的结构特征、性质及应用;重点综述了新型卟啉化合物及金属配合物的合成及应用;新型卟啉衍生物的合成及选择性识别;新型卟啉衍生物的合成及在光学方面的应用。并对卟啉化学的发展进行了展望。     

金属卟啉在新型材料领域的应用进展

作为新型材料其中一员,卟啉及金属卟啉在光电器件、医药和功能材料等领域具有重要的研究意义和广泛的应用前景。本文综述了近年来卟啉及金属卟啉化合物在新型材料方面的研究,重点介绍了金属卟啉化合物在电化学、分子自组装及催化等方面的应用新进展,并对其未来在新型材料领域的研究进行了展望。     

新型卟啉化合物的合成应用新进展

简要介绍了卟啉类化合物的结构特征、性质及应用;重点综述了新型卟啉化合物及金属配合物的合成及应用;新型卟啉衍生物的合成及选择性识别;新型卟啉衍生物的合成及在光学方面的应用。并对卟啉化学的发展进行了展望。     

聚合物键联钴卟啉的合成及其催化作用

合成了 5 -对羟苯基 - 1 0 ,1 5 ,2 0 -三 (对甲氧苯基 )卟啉 (1 )及其钴配合物 (2 )。将(1 )与氯甲基化聚苯乙烯树脂键合得聚合物键联卟啉 (3) ,(3)与钴离子络合得聚合物键联钴卟啉 (4) ,考察了 (4)对丙硫醇的催化氧化作用。对卟啉化合物进行了 IR、UV测定和元素分析。对丙硫醇氧化产物作了 HPL C、UV、IR和 MS分析。     

酚酸类化合物在化妆品中的研究进展

简单介绍了酚酸类化合物的来源和生物活性,综述了酚酸类化合物作为一种天然化合物,通过清除自由基、抑制炎症反应、抑菌、抑制酪氨酸酶活性、加速分解肌肤中的晚期糖化终末产物等途径起到的美白淡斑、抗衰老、抗炎、屏障修护等多重护肤功效,并介绍了酚酸类化合物的安全性问题,提出了酚酸类化合物生物利用度低、低水溶性等实际应用问题,采用生物基纳米颗粒负载酚酸类化合物可使部分实际应用问题得到改善。最后阐述了目前酚酸类化合物在化妆品行业应用中存在的问题,以期为酚酸类化合物在护肤领域的应用提供参考。     

一种长链卟啉的合成、表征及液晶性质研究

文章通过一系列反应,合成出一种带有八条柔性长链的卟啉化合物,并合成出该卟啉的锌、铜金属配合物。通过紫外-可见光谱、红外光谱、核磁共振氢谱等对化合物进行表征,并研究了它们的荧光性质和液晶性质。     

Natural Compounds as Promising Adjuvant Agents in The Treatment of Gliomas

In humans, glioblastoma is the most prevalent primary malignant brain tumor. Usually, glioblastoma has specific characteristics, such as aggressive cell proliferation and rapid invasion of surrounding brain tissue, leading to a poor patient prognosis. The current therapy—which provides a multidisciplinary approach with surgery followed by radiotherapy and chemotherapy with temozolomide—is not very efficient since it faces clinical challenges such as tumor heterogeneity, invasiveness, and chemoresistance. In this respect, natural substances in the diet, integral components in the lifestyle medicine approach, can be seen as potential chemotherapeutics. There are several epidemiological studies that have shown the chemopreventive role of natural dietary compounds in cancer progression and development. These heterogeneous compounds can produce anti-glioblastoma effects through upregulation of apoptosis and autophagy; allowing the promotion of cell cycle arrest; interfering with tumor metabolism; and permitting proliferation, neuroinflammation, chemoresistance, angiogenesis, and metastasis inhibition. Although these beneficial effects are promising, the efficacy of natural compounds in glioblastoma is limited due to their bioavailability and blood–brain barrier permeability. Thereby, further clinical trials are necessary to confirm the in vitro and in vivo anticancer properties of natural compounds. In this article, we overview the role of several natural substances in the treatment of glioblastoma by considering the challenges to be overcome and future prospects.     

A natural soil and mechanism of removal

Nitrogen compounds in natural soils are studied in relation to their effect on the soil removal mechanism in detergency. Nitrogen compounds in various forms and in fairly large amts are found in natural soils, and more than 24% of these nitrogen compounds are presumed to be high mol wt nitrogen compounds or proteins. These high mol wt nitrogen compounds which cannot be removed by water can be removed by the detergent action of sodium dodecyl benzene sulfonate (DBS). When the detergency of DBS was compared with nonyl phenol-polyoxyethylene adduct, the detergency for artificial soil cloths did not coincide with results obtained with naturally soiled cloths. These data suggest that some interaction between DBS and nitrogen compounds might have contributed to the detergent action. If proteins were added to the present artificial soil formulation, better correlation might be expected between artificial and natural soil detergency results in DBS evaluation.     

Phototoxic Activity and DNA Interactions of Water‐Soluble Porphyrins and Their Rhenium(I) Conjugates

In the search for alternative photosensitizers for use in photodynamic therapy (PDT), herein we describe two new water‐soluble porphyrins, a neutral fourfold‐symmetric compound and a +3‐charged tris‐methylpyridinium derivative, in which either four or one [1,4,7]‐triazacyclononane (TACN) units are connected to the porphyrin macrocycle through a hydrophilic linker; we also report their corresponding tetracationic Re^I conjugates. The in vitro (photo)toxic effects of the compounds toward the human cell lines HeLa (cervical cancer), H460M2 (non‐small‐cell lung carcinoma), and HBL‐100 (non‐tumorigenic epithelial cells) are reported. Three of the compounds are not cytotoxic in the dark up to 100 μm , and the fourfold‐symmetric couple revealed very good phototoxic indexes (PIs). The intracellular localization of all derivatives was studied in HeLa cells by confocal fluorescence microscopy. Although low nuclear localization was observed for some of them, it still prompted us to investigate their capacity to bind both quadruplex and duplex DNA; we observed significant selectivity in the tris‐methylpyridinium derivatives for G‐quadruplex interactions.     

噻唑/·唑类活性天然产物及活性小分子化合物研究进展

介绍了天然界中存在很多含有噻唑/(口恶)唑结构单元的活性分子,其生物合成途径或仿生合成方法通常分别以多肽氨基酸残基的羧酸基团或羧酸衍生物为底物,与半胱氨酸/丝氨酸等天然氨基酸或经过衍生化的非天然氨基酸环合、氧化而成,因此天然产物中的噻唑/(口恶)唑C5位通常以无取代的形式存在。然而,C5位二聚化、烯基化或芳基化的噻唑/(口恶)唑结构单元常见于具有广泛药理活性的人工合成的分子中,构建这类结构单元通常都需预先制备β-取代的非天然氨基酸。并且,关于该类天然产物的结构改造均未涉及噻唑/(口恶)唑C5位上的官能团化修饰,这是由于目前尚缺乏该位点上的官能团化方法而造成的。该现状预示着,开发噻唑/(口恶)唑C5位官能团化新方法,并将其应用于噻唑/(口恶)唑天然产物的结构修饰,具有十分重要的意义和研究价值。     

卟啉金属有机框架材料在光催化领域的最新应用

金属卟啉有机框架有机框架材料是一种由卟啉或金属卟啉作为结构单元构筑的新型周期性网状结构材料，既具有卟啉拓宽光谱响应范围、降低光生电子-空穴复合率的独特优势，又具有MOFs材料的多孔道、孔道尺寸可调节、比表面积大的双重优势，成为目前具有良好光电性质的新型光催化剂。近年来，许多科学家们致力于新型光催化剂的开发与应用。尤其是近几年来，随着材料科学的发展，新型光催化剂金属卟啉MOFs成为光催化剂的研究热点并取得了令人欣慰的成果。本文主要综述了近十年来卟啉/金属卟啉MOFs在二氧化碳还原、裂解水制氢、光降解有机染料等领域的最新应用，并对未来MPFs在光催化领域的发展进行了展望.     

Application of marine biotechnology in the production of natural biocides for testing on environmentally innocuous antifouling coatings

The widely recognized biofouling phenomenon has many negative consequences for artificial structures that are in contact with seawater in the form of structural defects and additional expenses for maritime companies due to cleaning and prevention processes. After having analyzed the serious environmental problems caused by an indiscriminate use of highly toxic biocides coming from organic derivatives of tin compounds and the uncontrolled emissions of volatile organic compounds (VOC) to the atmosphere, the evolving technology of antifouling paintings (further mandated by current environmental standards) aims to develop environmentally innocuous water-based coverings in which extracts of the very same marine world are used as biocide compounds. Water-based coatings are being developed that use low-toxic elements and natural biocides, where bacteria is isolated from surfaces immersed in the marine environment, creating a promising source of natural antifouling compounds. The result is a new environmentally friendly antifouling coating that is able to mitigate the problem of biofouling without affecting the surrounding medium, and which may be applied on any artificial structure in contact with seawater. An erratum to this article can be found at