- In situ tracking and characterisation of scorpionate ligands via 11B-NMR spectroscopy
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Herein, we exemplify the use of 11B-NMR spectroscopy as a new means of tracking the synthesis of scorpionate ligands in situ and ascertaining their purity upon isolation. We have demonstrated the use of the characterisation technique on five well known scorpionate ligands as their potassium salts.
- Thomas, Jarrod R.,Sulway, Scott A.
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- Synthesis, characterization and X-ray crystal structure of ZnII complex with poly-nitrogen ligand [η3-HB(3,5-Me2pz)3] 2Zn·2C6H5CH3
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Di-hydrotris(3,5-dimethylpyrazol-l-yl)borate ZnII was prepared from KHB(3,5-Me2pz)3 and Zn(NO3)2-OH2O in acetone, characterized by elemental analysis and 1H NMR. Crystal structure determination shows that the configuration around the ZnII center is a slightly distorted octahedron. Copyright
- Yang, Ke-Wu,Wang, Yong-Zhen,Huang, Zhong-Xian,Sun, Jie
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- Deep-blue emitting cerium(iii) complexes with tris(pyrazolyl)borate and triflate ligands
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Red, green and blue emitting materials, the three primary colors, are very important in lighting and display. Red-emitting Eu(iii) complexes and green-emitting Tb(iii) complexes exhibit high color purity and photoluminescence (PL) efficiency. However, it
- Bian, Zuqiang,Cai, Zelun,Guo, Ruoyao,Liu, Zhiwei,Qi, Hao,Yan, Wenchao
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p. 3234 - 3240
(2022/03/07)
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- Ligand effects on electronic structure and bonding in U(iii) coordination complexes: A combined MCD, EPR and computational study
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The trivalent oxidation state of uranium has been shown to undergo unique reactivity, from its ability to activate a variety of small molecules to its role in the catalytic reduction of ethene to ethane amongst others. Central to this unique reactivity an
- Autschbach, Jochen,Bart, Suzanne C.,Neidig, Michael L.,Wolford, Nikki J.,Yu, Xiaojuan
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supporting information
p. 14401 - 14410
(2020/11/07)
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- D-f transition based electroluminescent material and device
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An electroluminescent material comprises a compound represented by the formula (I), wherein R1, R2, R3, and R4 independently represent H, a C1-C8 alkyl group, a halogen substituted C1-C9 alkyl group,or a halogen atom, the halogen element is at least one of fluorine, chlorine, bromine, and iodine; or comprises a compound represented by the formula (II), wherein R1, R2, R3, and R4 independently represent H, a C1-C8 alkyl group, a halogen substituted C1-C9 alkyl group, or a halogen atom, the halogen element is at least one of fluorine, chlorine, bromine, and iodine.
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Paragraph 0073; 0074
(2019/10/01)
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- Universal Anticancer Cu(DTC)2 Discriminates between Thiols and Zinc(II) Thiolates Oxidatively
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Aerobic organisms must rely on abundant intracellular thiols to reductively protect various vital functional units, especially ubiquitous zinc(II) thiolate sites of proteins, from deleterious oxidations resulting from oxidizing environments. Disclosed here is the first well-defined model study for reactions between zinc(II) thiolate complexes and copper(II) complexes. Among all the studied ligands of copper(II), diethyldithiocarbamate (DTC) displays a unique redox-tuning ability that enables copper(II) to resist the reduction by thiols while retaining its ability to oxidize zinc(II) thiolates to form disulfides. This work proves for the first time that it is possible to develop oxidants to discriminate between thiols and zinc(II) thiolates, alluding to a new chemical principle for how oxidants, especially universal anticancer Cu(DTC)2, might circumvent the intracellular reductive defense around certain zinc(II) thiolate sites of proteins to kill malignant cells.
- Xu, Luyan,Xu, Jialin,Zhu, Jingwei,Yao, Zijian,Yu, Na,Deng, Wei,Wang, Yu,Lin, Bo-Lin
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supporting information
p. 6070 - 6073
(2019/03/29)
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- Development of solvent-free ambient mass spectrometry for green chemistry applications
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Green chemistry minimizes chemical process hazards in many ways, including eliminating traditional solvents or using alternative recyclable solvents such as ionic liquids. This concept is now adopted in this study for monitoring solvent-free reactions and analysis of ionic liquids, solids, and catalysts by mass spectrometry (MS), without using any solvent. In our approach, probe electrospray ionization (PESI), an ambient ionization method, was employed for this purpose. Neat viscous room-temperature ionic liquids (RTILs) in trace amounts (e.g., 25 nL) could be directly analyzed without sample carryover effect, thereby enabling high-throughput analysis. With the probe being heated, it can also ionize ionic solid compounds such as organometallic complexes as well as a variety of neat neutral solid chemicals (e.g., amines). More importantly, moisture-sensitive samples (e.g., [bmim][AlCl4]) can be successfully ionized. Furthermore, detection of organometallic catalysts (including air-sensitive [Rh-MeDuPHOS][OTf]) in ionic liquids, a traditionally challenging task due to strong ion suppression effect from ionic liquids, can be enabled using PESI. In addition, PESI can be an ideal approach for monitoring solvent-free reactions. Using PESI-MS, we successfully examined the alkylation of amines by alcohols, the conversion of pyrylium into pyridinium, and the condensation of aldehydes with indoles as well as air- and moisture-sensitive reactions such as the oxidation of ferrocene and the condensation of pyrazoles with borohydride. Interestingly, besides the expected reaction products, the reaction intermediates such as the monopyrazolylborate ion were also observed, providing insightful information for reaction mechanisms. We believe that the presented solvent-free PESI-MS method would impact the green chemistry field.
- Liu, Pengyuan,Forni, Amanda,Chen, Hao
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p. 4024 - 4032
(2014/05/06)
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- Solid-state and solution structures of a series of [(HBPz3Me2)Rh(CO)(PR3)] and [(HBPz3Me2,4Cl)Rh(CO)(PR3)] complexes
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Addition of 1 equiv. of a phosphane or phosphite ligand to the κ3-bonded [TpMe2Rh(CO)2] and [TpMe2,4ClRh(CO)2] dicarbonyl precursors gives the monosubstituted complexes [TpRh(CO)L]. The X-ray crystal
- Malbosc, Fran?ois,Chauby, Valérie,Serra-Le Berre, Carole,Etienne, Michel,Daran, Jean-Claude,Kalck, Philippe
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p. 2689 - 2697
(2007/10/03)
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