Article
Chemistry, Inorganic & Nuclear
Nabila Rauf Naz, Gregor Schnakenburg, Zsolt Kelemen, Dalma Gal, Laszlo Nyulaszi, Rene T. Boere, Rainer Streubel
Summary: A phosphanido-type bridged bis(imidazolium) salt, prepared via reductive deselenization of a tricyclic 1,4-diphosphinine diselone, allows access to a novel anionic P-functional tricyclic bis(NHC) through deprotonation. This compound also enables a P-functionalization/deprotonation sequence to obtain the first mixed P-substituted tricyclic bis(NHCs) and facilitates coordination of phosphorus centers to rhodium(I) fragments.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Ravi Srivastava, Martin Jakoobi, Chloe Thieuleux, Elsje Alessandra Quadrelli, Clement Camp
Summary: The rhodium complex Rh(HL)(COD)Cl, featuring a functionalized N-heterocyclic carbene ligand with an oxygen-containing pendant arm, has been used to synthesize a series of neutral and cationic Rh(i) O,C chelates. Analysis shows that the strength of the Rh-O bond is greatly affected by the nature of the O-donor, resulting in significant differences in catalytic activity. The most active catalyst, [Rh(L)(COD)]2, demonstrates good catalytic performance under mild conditions for hydrosilylation and selective remote functionalization of internal olefins.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Ye Lu, Patrick D. Dutschke, Jenny Kinas, Alexander Hepp, Guo-Xin Jin, F. Ekkehardt Hahn
Summary: Here, we report the synthesis and characterization of a series of organometallic Borromean rings (BRs) and [2]catenanes prepared from benzobiscarbene ligands. The formation and stability of these interlocked species are strongly influenced by solvophobic effects. The stability of BRs can be enhanced by using precursors with longer alkyl substituents, while the proportion of [2]catenanes in solution can be increased by lengthening the N-alkyl substitutes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Inorganic & Nuclear
Anjitha Jayaraj, Archana V. Raveedran, Anjima T. Latha, Deepshikha Priyadarshini, P. Chinna Ayya Swamy
Summary: Asymmetric metal-based catalysis has progressed rapidly in recent years, relying on chiral ligands for its efficiency. Rational design and careful selection of chiral ligands have led to numerous breakthroughs. N-heterocyclic carbene ligands (NHCs) are widely used chiral architectures in asymmetric catalysis, thanks to both steric and electronic aspects that provide unexpected chemical stability and coordination adaptability with various transition metals. The ease of precursor synthesis and the ability to introduce chiral elements into the backbone of NHCs make them potential ligands in metal-based asymmetric catalysis. The number of strategies for designing efficient NHC-metal catalysts for novel asymmetric chemical transformations has significantly increased.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Kan Zhang, Yanxiu Yao, Wenjin Sun, Rui Wen, Yanyan Wang, Huaming Sun, Weiqiang Zhang, Guofang Zhang, Ziwei Gao
Summary: The newly designed T-NHC carbenes effectively accelerated the transmetalation reaction, leading to the efficient synthesis of a variety of ynone compounds through coupling reactions. Both triazine wingtips and NHCs played key roles in the putative Pd/Pd catalytic cycle with high TON and TOF.
CHEMICAL COMMUNICATIONS
(2021)
Review
Chemistry, Inorganic & Nuclear
Estefan van Vuuren, Frederick P. Malan, Marile Landman
Summary: The incorporation of N-tethers into N-heterocyclic carbene ligands has led to the development of a powerful class of multidentate, responsive ligand frameworks that have shown success and usefulness in various applications, particularly in homogeneous catalysis. These NHC complexes of group IX transition metals exhibit a wide range of accessible oxidation states, favorable stabilities, and reactivities, and have been the subject of significant research interest in the past two decades. The inclusion of carbon as a secondary binding atom has enabled these metal complexes to undergo complex C-H activation, small molecule fixation and activation, and unusual migratory insertion reactions.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Materials Science, Multidisciplinary
Jiahao Jiao, Abudukadi Tudi, Min Zhang, Wenbing Cai, Junjie Li, Zhihua Yang, Shilie Pan
Summary: Two new polymorphs of Pb(II)-containing oxyhalides, Pb14O8I12 (alpha-POI) and Pb7O4I6 (beta-POI), were successfully synthesized via high-temperature solution method. These materials exhibit a wide transparent range and large birefringence, making them promising infrared optical materials according to first principles calculations.
SCIENCE CHINA-MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Qian-Qian Chen, Chun-Li Hu, Ming-Zhi Zhang, Jiang-Gao Mao
Summary: Researchers have successfully designed and synthesized a new birefringent crystal with a large birefringence. The combination of chloroiodate(v) group and 2-amino-5-chloropyridine group has resulted in a superior synergy effect.
Article
Chemistry, Organic
Soumen Biswas, Luca De Angelis, Gildardo Rivera, Hadi Arman, Michael P. Doyle
Summary: 1,2,3-Triazine 1-oxides are highly effective substrates for inverse electron demand Diels-Alder reactions. These stable heterocyclic compounds, formed from vinyldiazoacetates via reaction with tert-butyl nitrite, undergo clean nucleophilic addition reactions with amidines to form pyrimidines, with beta-ketocarbonyl compounds and related nitrile derivatives to form polysubstituted pyridines, and with 3/5-aminopyrazoles to form pyrazolo[1,5-a]pyrimidines, in high yields. These reactions, catalyzed by bases, are rapid at room temperature and allow for a range of structural modifications.
Article
Chemistry, Inorganic & Nuclear
Yichao Zhuang, Yuansheng Qian, Danyu Tu, Yan Li, Jiyong Liu, Liang Shen, Di Wu
Summary: Inverse crown ethers (ICEs) have alternating polarity of cationic metal ring and encapsulated ion, with a new tridentate aryloxide-N-heterocyclic carbene ligand introduced to stabilize mu(4)-oxo [Mg4O] cores in ICEs. The reaction with MgBr2 resulted in formation of (L)Mg2Br3, (L)(2)Mg4OBr4, and (L)Mg4OBr5(THF)(2), which all possess ICEs character with mu(4)-Oxo [Mg4O] unit.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Organic
Jun He, Jie-Kun Xu, Lin-Bo Guo, Cong-Yuan Xia, Wen-Wen Lian, Hai-Yan Tian, Jia Zhang, Ying-Xue Shi, Wei-Ku Zhang
Summary: Fischdiabietane A is a novel asymmetric diterpenoid dimer isolated from Euphorbia fischeriana roots, possessing unique ring systems and structures. It exhibits higher activity against T47D cells compared to cisplatin, inducing apoptosis through caspase-3 activation and poly(ADP-ribose) polymerase degradation.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Hao Gong, Cheng Zhang, Takuya Ogaki, Hiroyuki Inuzuka, Daisuke Hashizume, Daigo Miyajima
Summary: AC3Ts, a substructure of Tz-GCN, can capture protons as organic superbases and exhibit unique anion-pi interactions that alter their ionization potentials. These features are expected to expand the usage scope and possibilities for GCNs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Xin-Yue Pei, Ying He, Jia-Yin Wang, Hong-Yan Wang, Qi-Bing Bo
Summary: Four titanium-oxo clusters (TOCs) with the same coordination environments were synthesized using benzoic acid derivatives and Ti((OPr)-Pr-i)(4) via solvothermal synthesis in DMF solvent. Single crystal X-ray diffraction analysis confirmed the open cage-like structure of the TOCs. The photocatalytic degradation of rhodamine B was effectively achieved by Ti-MOB, which had the lowest band gap and open cage-like structure.
Article
Chemistry, Multidisciplinary
Manmatha Mahato, Sanghee Nam, Rassoul Tabassian, Saewoong Oh, Van Hiep Nguyen, Il-Kwon Oh
Summary: Multifunctional porous carbon materials play a key role in achieving a clean, safe, and sustainable working environment and energy storage devices. The electronically conjugated nanoporous covalent triazine frameworks have been designed for selective CO2 adsorption and used as active electrode materials for high energy density solid-state flexible supercapacitors. These materials exhibit excellent CO2 adsorption performance, high CO2/N-2 selectivity, and maintain capacitive performance under mechanical bending, powering commercial LEDs easily.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Environmental
Huanhuan Li, Yuzheng Wang, Lan Yu, Chang Liu, Cefeng Zhou, Sibing Sun, Mingguang Li, Ye Tao, Gaozhan Xie, Hui Xu, Wei Huang, Runfeng Chen
Summary: The study successfully designed and synthesized a symmetric V-shaped triazine host DCzT with non-covalent intramolecular interactions, replacing the phenyl core of the twisted blue host mCP. Through the NCIs, DCzT demonstrated a closed plane, boosting ordered molecular packing arrangement for enhanced carrier transport channel performance and achieving efficient white TADF OLEDs.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Organic
Michael Nonnenmacher, Dominik M. Buck, Doris Kunz
BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY
(2016)
Article
Chemistry, Inorganic & Nuclear
Eva Juergens, Doris Kunz
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2017)
Article
Chemistry, Inorganic & Nuclear
Kim S. Flaig, Benjamin Raible, Verena Mormul, Natalie Denninger, Caecilia Maichle-Moessmer, Doris Kunz
Article
Chemistry, Organic
Anna Zens, Philipp Seubert, Benedikt Kolb, Marius Wurster, Marcel Holzwarth, Fabian Mannchen, Robert Forschner, Birgit Claasen, Doris Kunz, Sabine Laschat
SYNTHESIS-STUTTGART
(2018)
Review
Chemistry, Inorganic & Nuclear
Doris Kunz, Kim S. Flaig
COORDINATION CHEMISTRY REVIEWS
(2018)
Article
Chemistry, Physical
Yingying Tian, Eva Juergens, Katharina Mill, Ronja Jordan, Theo Maulbetsch, Doris Kunz
Article
Chemistry, Organic
Anna Zens, Florian Bauer, Benedikt Kolb, Fabian Mannchen, Philipp Seubert, Robert Forschner, Kim S. Flaig, Andreas Koehn, Doris Kunz, Sabine Laschat
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2019)
Article
Chemistry, Inorganic & Nuclear
Yingying Tian, Theo Maulbetsch, Ronja Jordan, Karl W. Tornroos, Doris Kunz
Article
Chemistry, Multidisciplinary
Theo Maulbetsch, Eva Juergens, Doris Kunz
CHEMISTRY-A EUROPEAN JOURNAL
(2020)
Article
Chemistry, Multidisciplinary
Theo Maulbetsch, Doris Kunz
Summary: The synthesis of a novel NHC-containing porphyrinoid ligand with good fluorescence properties was successfully achieved. Experimental results demonstrated that the heterocyclic moieties in both the ligand and its metal complexes exhibit aromatic character instead of antiaromatic macrocycles.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Fabio Mazzotta, Georg Zitzer, Bernd Speiser, Doris Kunz
CHEMISTRY-A EUROPEAN JOURNAL
(2020)
Article
Chemistry, Inorganic & Nuclear
Fabio Mazzotta, Karl W. Tornroos, Doris Kunz
Article
Biochemistry & Molecular Biology
Ronja Jordan, Doris Kunz
Summary: The coordination chemistry of an electron-rich macrocyclic CNC pincer-ligand was studied using NMR spectroscopy and X-ray crystal structure analysis. It was found that the ligand exhibited bridging coordination with lithium, facial coordination with potassium, and C-H activation with metal complexes.
Article
Chemistry, Inorganic & Nuclear
Fabio Mazzotta, Doris Kunz
Summary: Scandium complexes with a C-ylidic, electron-deficient Cp ligand were obtained by substituting tetrahydrofuran ligands, resulting in an equilibrium among free ligands, half-sandwich complexes, and cationic metallocenes in acetonitrile, which was confirmed by NMR spectroscopy.
Article
Chemistry, Inorganic & Nuclear
Dominic Schmid, Alexander Seyboldt, Klaus Eichele, Doris Kunz
DALTON TRANSACTIONS
(2017)
