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Psychedelic medicines 迷幻药
IF 1.1 4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-07-17 DOI: 10.1021/cen-09413-cover
M. Piggott, P. Duggan
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引用次数: 0
Retraction notice to ‘Crystal Structures and Anti-Colon Cancer Activity of Two Lanthanide Complexes with O-Donor Diacetone Ligands’ [Australian Journal of Chemistry (2019) doi:10.1071/CH18568] “两种含o -供体二丙酮配体的镧系化合物的晶体结构和抗结肠癌活性”的撤回通知[澳大利亚化学杂志](2019)doi:10.1071/CH18568]
IF 1.1 4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-07-10 DOI: 10.1071/ch18568_re
Gang Chen, Chang-Hong Yu, Xin Lv, Bing Qiu, Wei Jiang
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引用次数: 0
Evaluation of the 5-ethynyl-1,3,3-trimethyl-3H-indole ligand for molecular materials applications 5-乙基-1,3,3-三甲基- 3h -吲哚配体在分子材料中的应用评价
IF 1.1 4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-07-06 DOI: 10.1071/ch23069
David Jago, D. C. Milan, A. Sobolev, S. Higgins, A. Vezzoli, R. Nichols, George A. Koutsantonis
The modification of conjugated organic compounds with organometallic moieties allows the modulation of the electronic and optoelectronic properties of such compounds and lends them to a variety of material applications. The organometallic complexes [M(Cp′)(L)n] (M = Ru or Fe; Cp′ = cyclopentadiene (Cp) or pentamethylcyclopentadiene (Cp*); (L)n = (PPh3)2 or 1,2-bi(diphenylphosphino)ethane (dppe)) and [M(L)n] (M = Ru; (L)n = (dppe)2 or (P(OEt)3)4; or M = Pt; (L)n = (PEt3)2, (PPh3)2 or tricyclohexylphosphine, (PCy3)2) modified with a 5-ethynyl-1,3,3-trimethyl-3H-indole ligand were prepared and characterised by NMR spectroscopy, IR and single-crystal X-ray diffraction. Cyclic voltammetry and IR spectroelectrochemistry of the ruthenium systems showed a single-electron oxidation localised over the M–C≡C–aryl moiety. The N-heteroatom of the indole ligand showed Lewis base properties and was able to extract a proton from a vinylidene intermediate as well as coordinate to CuI. Examples from the wire-like compounds were also studied by single-molecule break junction experiments but molecular junction formation was not observed. This is most likely attributable to the binding characteristics of the substituted terminal indole groups used here to the gold contacts.
用有机金属基团修饰共轭有机化合物可以调制此类化合物的电子和光电子性质,并使其适用于各种材料应用。有机金属配合物[M(Cp ')(L)n] (M = Ru或Fe;Cp′=环戊二烯(Cp)或五甲基环戊二烯(Cp*);(L)n = (PPh3)2或1,2-双(二苯基膦)乙烷(dppe))和[M(L)n] (M = Ru;(L)n = (dppe)2或(P(OEt)3)4;或M = Pt;制备了(L)n = (PEt3)2, (PPh3)2或用5-乙基-1,3,3-三甲基- 3h -吲哚配体修饰的三环己基膦,(PCy3)2,并通过NMR, IR和单晶x射线衍射对其进行了表征。钌体系的循环伏安法和红外光谱电化学表明,在M-C≡c -芳基部分存在单电子氧化。吲哚配体的n -杂原子表现出路易斯碱性质,能够从偏乙烯中间体中提取一个质子,并与CuI配位。用单分子断结实验也研究了线状化合物的例子,但没有观察到分子结的形成。这很可能是由于这里使用的取代末端吲哚基团与金触点的结合特性。
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引用次数: 0
PhotoCORMs based on zinc(ii)-flavonol derivatives with superior biological properties for use in living organisms 以锌(ii)-黄酮醇衍生物为基础的具有优异生物学性能的生物材料
IF 1.1 4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-07-06 DOI: 10.1071/ch22243
L. Sun, Siying An, Dong Wei, Ronglan Zhang, Jian-she Zhao
CO is an important gas signal molecule and plays an indispensable role in the maintenance of cell homeostasis. Herein, photoinduced CO-releasing molecules (photoCORMs), that combine the effects of zinc(ii) and different ligands including flavonol derivatives and tripod pyridyl compounds, are reported. The photoCORMs can release about one equivalent of CO, and the solid samples are stabile for more than 90 days in air. Cytotoxicity tests suggest that photoCORMs possess low toxicity and have the potential to be used in organisms. The intracellular uptake and photoreactivity of photoCORM 3a, with low toxicity and a rapid CO-release rate, were studied in HeLa cells. The results indicate that 3a could successfully penetrate the cell membrane and enter the cytoplasm. More importantly, it is further demonstrated that 3a can successfully release CO in HeLa cells, which is detected using intracellular CO sensors. Based on the cell study, the same result was found when the photoinduced CO release of 3a in Kunming mice was studied utilizing a carboxyhemoglobin kit. This study is of great significance for the development of new valuable CO donors that can be applied to organisms to exert their biological effects.
一氧化碳是一种重要的气体信号分子,在维持细胞内稳态中起着不可缺少的作用。本文报道了结合锌(ii)和不同配体(包括黄酮醇衍生物和三脚吡啶基化合物)作用的光诱导co释放分子(photoCORMs)。photoCORMs可以释放出大约1当量的CO,固体样品在空气中可以稳定90天以上。细胞毒性试验表明,光corms具有低毒性,具有在生物体中使用的潜力。在HeLa细胞中研究了具有低毒性和快速co释放率的photoCORM 3a的细胞内摄取和光反应性。结果表明,3a能成功穿透细胞膜,进入细胞质。更重要的是,进一步证明了3a可以在HeLa细胞中成功释放CO,这是通过细胞内CO传感器检测到的。在细胞研究的基础上,利用碳氧血红蛋白试剂盒研究昆明小鼠光诱导的3a一氧化碳释放也得到了相同的结果。本研究对开发新的有价值的CO供体,应用于生物体发挥其生物学效应具有重要意义。
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引用次数: 0
Palladium-mediated CO 2 extrusion followed by insertion of ketenes: translating mechanistic studies to develop a one-pot method for the synthesis of ketones 钯介导的CO 2挤压后插入酮:酮类合成一锅法的翻译机理研究
IF 1.1 4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-05-31 DOI: 10.1071/ch23026
Yang Yang, Allan J. Canty, Richard A. J. O’Hair

Multistage mass spectrometry (MSn) experiments were used to explore extrusion–insertion (ExIn) reactions of the palladium complex [(phen)Pd(O2CPh)]+ (phen, 1,10-phenanthroline). Under collision-induced dissociation (CID) conditions, the organopalladium cation [(phen)Pd(Ph)]+ was formed via decarboxylation and was found to react with phenylmethylketene to yield the enolate [(phen)Pd(CPhMeC(O)Ph)]+ via an insertion reaction. A further stage of CID revealed that the enolate fragments via loss of styrene to form the acyl complex [(phen)Pd(C(O)Ph)]+. Formation of both the coordinated enolate and acyl anions is supported by density functional theory (DFT) calculations. Attempts to develop a palladium-mediated one-pot synthesis of ketones from 2,6-dimethoxybenzoic acid as the key substrate and the ketene substrates R1R2C═C═O (R1 = Ph, R2 = Me; R1 = R2 = Ph) proved challenging owing to low yields and side product formation.

采用多级质谱(MSn)实验研究了钯配合物[(phen)Pd(O2CPh)]+ (phen, 1,10-菲罗啉)的挤出-插入(ExIn)反应。在碰撞诱导解离(CID)条件下,有机钯阳离子[(phen)Pd(Ph)]+通过脱羧形成,并与苯基甲基烯酮通过插入反应生成烯酸盐[(phen)Pd(CPhMeC(O)Ph)]+。进一步的CID阶段表明,烯酸酯碎片通过苯乙烯的损失形成酰基配合物[(phen)Pd(C(O)Ph)]+。配位烯酸盐和酰基阴离子的形成均得到密度泛函理论(DFT)的支持。以2,6-二甲氧基苯甲酸为关键底物,以烯酮为底物的钯催化一锅法合成酮的实验研究(R1 = Ph, R2 = Me;R1 = R2 = Ph)被证明是具有挑战性的,因为低产量和副产物的形成。
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引用次数: 0
Retraction notice to ‘Self-Assembly of Protoporphyrin IX-TEG Derivatives into Tunable Nanoscaled Spherical Structures’ [Australian Journal of Chemistry 63(9) (2010), 1326–1329. doi:10.1071/CH10199] “原卟啉IX-TEG衍生物自组装成可调谐纳米级球形结构”的撤回通知[澳大利亚化学杂志]63(9)(2010),1326-1329。doi: 10.1071 / CH10199]
IF 1.1 4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-05-12 DOI: 10.1071/ch10199_re
S. Bhosale, S. Bhosale, M. Kalyankar, S. Langford, Ceilica H. Lalander
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引用次数: 0
Nonlinear optics: from theory to applications, with a focus on the use of two-photon absorption in biology 非线性光学:从理论到应用,重点介绍双光子吸收在生物学中的应用
IF 1.1 4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-05-12 DOI: 10.1071/ch23015
Mélanie Dréano, O. Mongin, F. Paul, M. Humphrey
The study of nonlinear optics in the 1960s attracted considerable attention from a theoretical standpoint, engendering many proposals for practical use of these new photonic effects. Among these suggestions, the development of efficient two-photon absorption (2PA) has attracted sustained interest due to its demonstrated (or potential) use in a broad range of applications that include optical data storage, optical limiting and nanofabrication. The use of 2PA in biological applications is particularly appealing. This is because 2PA offers several advantages for bio-oriented applications, such as intrinsic three-dimensional resolution, increased penetration depth in biological materials such as tissue and highly focused excitation at half-energy, leading to a decrease of auto-fluorescence and photodamage. In this Primer Review, we introduce the essential background theory needed for an understanding of the field, we describe the key experiments deployed to quantify material performance, we discuss the evolution of 2PA molecular design, and we summarise the state-of-the-art and the existing challenges in the use of 2PA in imaging, therapy and theranostics.
20世纪60年代非线性光学的研究从理论角度引起了相当大的关注,产生了许多实际应用这些新的光子效应的建议。在这些建议中,高效双光子吸收(2PA)的发展由于其在包括光数据存储、光限制和纳米制造在内的广泛应用中已被证明(或潜在)使用而引起了持续的兴趣。2PA在生物领域的应用尤其具有吸引力。这是因为2PA为生物定向应用提供了一些优势,例如固有的三维分辨率,增加了在生物材料(如组织)中的穿透深度,以及半能量下的高度聚焦激发,导致自身荧光和光损伤的减少。在这篇入门综述中,我们介绍了理解该领域所需的基本背景理论,我们描述了用于量化材料性能的关键实验,我们讨论了2PA分子设计的演变,我们总结了2PA在成像,治疗和治疗学中使用的最新技术和存在的挑战。
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引用次数: 0
Injectable hydrogels of enzyme-catalyzed cross-linked tyramine-modified gelatin for drug delivery 酶催化交联酪胺修饰明胶的可注射水凝胶
IF 1.1 4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-02-28 DOI: 10.1071/ch22188
Yuanhan Tang, J.-F. Ding, Xun Zhou, Xintao Ma, Yi Zhao, Qiyu Mu, Zixu Huang, Q. Tao, Fangjie Liu, Ling Wang
Enzymatically catalyzed cross-linking is a hydrogel fabrication method that generally is considered to have lower cytotoxicity than traditional chemical cross-linking methods. In order to optimize the properties of injectable hydrogels and expand their applications, an enzyme-catalyzed cross-linked injectable hydrogel was designed. The tyramine-modified gelatin (G-T) was formed into a stable injectable hydrogel by the combination of horseradish peroxidase (HRP) and hydrogen peroxide (H2O2) catalysis. 1H NMR spectroscopy was used to demonstrate the successful modification of gelatin by tyramine. The surface morphology of the prepared hydrogels was characterized jointly by atomic force microscopy (AFM) and scanning electron microscopy (SEM). Rheological tests demonstrated the tunable mechanical strength, formation kinetics, shear thinning and good self-recovery properties of the hydrogels. In addition, the hydrogels can be formed into various shapes by injection. The hydrogel network structure is complex and interlaced, as such it is suitable to encapsulate drugs for controlled release. The drug release from the prepared hydrogels followed the Peppas–Sahlin model and belonged to Fickian diffusion. This study constructed injectable hydrogels through the enzyme-catalyzed cross-linking of modified gelatin and applied the hydrogels for drug release, which is expected to expand the application in biomedical fields.
酶催化交联是一种水凝胶制备方法,通常被认为比传统的化学交联方法具有更低的细胞毒性。为了优化可注射水凝胶的性能,扩大其应用范围,设计了酶催化交联可注射水凝胶。在辣根过氧化物酶(HRP)和过氧化氢(H2O2)的催化作用下,将酪胺改性明胶(G-T)制备成稳定的可注射水凝胶。用核磁共振氢谱法证实了酪胺对明胶的成功改性。利用原子力显微镜(AFM)和扫描电镜(SEM)对制备的水凝胶的表面形貌进行了表征。流变学试验表明,水凝胶具有可调节的机械强度、地层动力学、剪切减薄和良好的自恢复性能。此外,水凝胶可以通过注射形成各种形状。水凝胶网状结构复杂,相互交织,适于包封药物以实现控释。水凝胶的药物释放符合Peppas-Sahlin模型,属于Fickian扩散。本研究通过酶催化改性明胶交联制备可注射水凝胶,并将其用于药物释放,有望扩大其在生物医学领域的应用。
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引用次数: 0
Retraction notice to 'A Biocompatible Gd<sup>III</sup>&#x2013;Organic Framework Incorporating Polar Pores for pH-Sensitive Anti-Cancer Drug Delivery and Inhibiting Human Bone Tumour Cells' 撤回“一种生物相容性Gd&lt;sup&gt;III&lt;/sup&gt;&#x2013;结合极性孔的有机框架,用于ph敏感性抗癌药物传递和抑制人类骨肿瘤细胞”的通知
4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-02-28 DOI: 10.1071/chv76n2retract
Mingliang Ren, Hui Li, Hu Liu, Lei Wang, Haibo Xiang, Xianrong Zhang, Bin Yu
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引用次数: 0
The effects of templates and seeds on the properties of nanosheet SAPO-34 molecular sieves and their catalytic performance in the MTO reaction 模板和种子对纳米SAPO-34分子筛性能的影响及其在MTO反应中的催化性能
IF 1.1 4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-02-28 DOI: 10.1071/ch22238
Tao Jiang, Yingzhi Bai, Lu Li, Weiwei Tai, Yujia Wang, Haiyan Wang, N. Sun
Nanoscale SAPO-34 molecular sieves were synthesized by adding different types of seed into hydrothermal synthesis systems with tetraethylammonium hydroxide (TEAOH) and triethylamine (TEA) & tetraethylammonium bromide (TEABr) as templates. The effects of different types of template and seed on the crystal structure, morphology, grain size and acidity of the molecular sieves were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), N2 isothermal adsorption–desorption and ammonia temperature-programmed desorption (NH3-TPD). The methanol-to-olefins (MTO) reaction performance of the synthesized samples was investigated in a fixed-bed reactor. The results showed that crystalline supernatant and seed soaking solution could be used as liquid seeds to assist in the synthesis of SAPO-34 molecular sieves with a lamellar structure. The yield of SAPO-34 synthesized by seed increased from 38.64 to 59.68%, and the methanol conversion rate was significantly improved as compared with that of SAPO-34 synthesized without seed. The nano-thickness of SAPO-34 synthesized with TEA&TEABr instead of TEAOH as template decreased from 100–150 to 40–50 nm, and the lifetime increased from 360 to 400 min with the original yield kept constant.
以四乙基氢氧化铵(TEAOH)、三乙胺(TEA)和四乙基溴化铵(TEABr)为模板剂,在水热合成体系中加入不同类型的种子,合成了纳米SAPO-34分子筛。采用x射线衍射(XRD)、扫描电镜(SEM)、N2等温吸附-脱附和氨温程序脱附(NH3-TPD)表征了不同类型模板和种子对分子筛晶体结构、形貌、粒径和酸度的影响。在固定床反应器上研究了合成样品的甲醇制烯烃反应性能。结果表明,结晶上清液和种子浸泡液可作为液体种子,辅助合成具有片层结构的SAPO-34分子筛。种子合成SAPO-34的产率由38.64%提高到59.68%,甲醇转化率较无种子合成SAPO-34有显著提高。以tea和teabr代替TEAOH为模板合成的SAPO-34的纳米厚度从100-150 nm减小到40-50 nm,寿命从360 min增加到400 min,且产率保持不变。
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引用次数: 1
期刊
Australian Journal of Chemistry
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