Review
Chemistry, Inorganic & Nuclear
Subhayan Dey, Rudolf Pietschnig
Summary: This review summarizes recent advances in the chemistry of bulky bisphosphane ligands related to the dppf motif, covering literature from 1981 to 2020 with over 220 original references. It discusses synthetic aspects, structural features, and implications for electronic situation and donor properties, as well as trends in the catalytic performance of such compounds.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Inorganic & Nuclear
Torsten Hoelzel, Andrey Belyaev, Meryem Terzi, Laura Stenzel, Markus Gernert, Christel M. Marian, Andreas Steffen, Christian Ganter
Summary: The sterically demanding carbene ITr was used as a ligand to prepare luminescent copper(I) complexes with a series of pyridine and quinoline derivatives forming linear, bis(coordinated) complexes. These complexes exhibit weak emission in solution, but intense blue to orange luminescence in PMMA films doped with 10%, showcasing triplet excited states or TADF with high radiative rate constants at room temperature.Density functional theory and multireference configuration interaction calculations were performed to explain the photophysics of these complexes, revealing a high density of low-lying electronic states with mixed MLCT, LLCT, and LC character.
INORGANIC CHEMISTRY
(2021)
Article
Polymer Science
Hyun Gyu Shin, Tapas R. Pradhan, Jin Kyoon Park, Jeung Gon Kim
Summary: The postpolymerization modification of acrylic acid copolymers is demonstrated in this study. A library of functional acrylate polymers was produced by direct addition of polymeric carboxylic acid to allene sulfonamides. Sterically congested methacrylic acid copolymers and acrylic acid copolymers were found to participate in the postpolymerization modification process with good conversions.
Article
Chemistry, Physical
J. Antonio Rivas-Loaiza, J. Pablo Garcia-Merinos, Martha I. Ramirez-Diaz, Heraclio Lopez-Ruiz, Yliana Lopez
Summary: Bis(indolyl)methane derivatives were synthesized using an organic catalyst, and their antibacterial activity was evaluated.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Applied
Gabriele Valora, Carmela Bonaccorso, Alessio Cesaretti, Cosimo G. Fortuna, Anna Spalletti, Fausto Elisei
Summary: This study thoroughly investigated the interactions between a series of sterically hindered phenanthroline derivatives and first-row transition metal ions through a combined spectroscopic study. The research found that the fluorescence emission quenching of these compounds is highly sensitive to the presence of cations, which can be utilized for analytical purposes. Additionally, femtosecond transient absorption measurements revealed unique excite state dynamics depending on the charge density of the metal ions considered.
Article
Chemistry, Inorganic & Nuclear
Folkert de Vries, Raquel Travieso-Puente, Peter Roewen, Edwin Otten
Summary: A series of heteroleptic three-coordinate mono(formazanate)zinc methyl complexes were synthesized and their behavior in solution was studied, revealing ligand redistribution reminiscent of the Schlenk equilibrium. The steric environment around the zinc center was found to correlate with the equilibrium concentration of (formazanate)zinc methyl compounds, while the kinetics for approaching equilibrium were shown to be dependent on electronic properties.
Article
Chemistry, Multidisciplinary
Carolin Dusold, Corinna Weiss, Frank Hampel, Andreas Hirsch
Summary: This study presents an unprecedented library of single and double bay-substituted perylene-pentaphenylbenzenes (PPBs), confirming extreme core-distortion and successful elimination of aggregation interactions of perylenes through X-ray analysis. Isomerically pure perylene-PPB hybrids exhibit remarkable differences in their photophysical properties with respect to their regiochemistry and peri-functionalization.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Fabian Scharinger, Adam Mark Palvoelgyi, Melanie Weisz, Matthias Weil, Christian Stanetty, Michael Schnuerch, Katharina Bica-Schroeder
Summary: In this study, we propose a novel approach for various asymmetric transformations of cyclic enones. By optimizing the catalyst components, we have developed a particularly powerful and versatile organocatalyst that shows excellent stereocontrol. Furthermore, a simple change in the diamine's configuration allows access to both product antipodes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Biochemistry & Molecular Biology
Qi Li, Xiu-Xia Liang, Wang Zhang, Man-Yi Han
Summary: A novel double Friedel-Crafts reaction of acylsilanes in water is reported, which allows for the synthesis of bis(indolyl)methane derivatives with 1-hydroxy or 1-silyl substituents in moderate to high yield. The selectivity of the reaction is regulated by the hydrogen bonds in the 5-hydroxyindole, leading to the synthesis of 1-hydroxy-bis(indolyl)methane derivatives.
Article
Chemistry, Inorganic & Nuclear
Liniquer A. Fontana, Vitor H. Rigolin, Marcos A. Ribeiro, Wdeson P. Barros, Jackson D. Megiatto
Summary: We report a synthetic strategy that allows for the preparation of sterically encumbered heteroleptic Ru(ii) porphyrinates with the desired configuration of stable/inert and weak/labile axial ligands to direct reactions between substrates to exclusively occur at the sterically encumbered face.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Organic
Yan Wu, Mou-De Liu, Qing Wang, Huan Tian, Jin-Bao Fan, Ying-Jun Zhou, Ya-Jing Wang, Xu Deng
Summary: Divergent dehydrogenative coupling reactions of tryptamines with nontoxic Fe-III salts as catalysts and DDQ as the co-oxidant have been developed. This method enables rapid and regioselective assembly of diverse 2,8'- and N1,8'-bis(indolyl)methane derivatives from easily available starting materials by simply changing the Fe-III salt and reaction temperature. The fast reaction rate, mild reaction conditions, low catalyst cost, and ease of operation make this methodology highly useful. The synthetic utility of this method was further demonstrated in the biomimetic synthesis of 6,6'-bis-(debromo)-gelliusine F.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Chemistry, Organic
Jinglin An, Xue Zhou, Yifan Zhang, Zhenfei Ye, Qianyou Guo, Hao Song, Zhenlei Song, Xiao-Yu Liu, Yong Qin
Summary: A nickel-catalysed reductive cross-coupling reaction was developed to synthesize all-carbon tetrasubstituted cycloalkenes in moderate to excellent yields up to 92%. Mechanistic studies revealed the significant assisting role of the carboxylic acid group in this sterically demanding coupling reaction.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Felix Wurl, Sergej Stipurin, Joshua Immanuel Kollar, Thomas Strassner
Summary: A novel class of cyclometalated platinum(II) complexes, previously considered to be inaccessible, was successfully synthesized using ligands predicted by density functional theory calculations. By screening three model ligands with varying steric demand, a series of six photoluminescent cyclometalated platinum(II) formamidinate complexes were obtained. The complexes exhibited significant hypsochromic shift of the emission wavelength, and the monometallic complexes supported the theoretical predictions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Bijeta Mitra, Pranab Ghosh
Summary: The study demonstrates that humic acid can be utilized as an efficient and environmentally friendly catalyst for the preparation of various organic compounds, with advantages such as non-toxicity, biodegradability, low catalyst loading, and good functional group tolerance. This strategy has significant environmental implications, and humic acid can be reused multiple times without losing its activity.
Article
Chemistry, Multidisciplinary
Prachi Bhatia, Krishna Pandey, Priyanka Das, Dheeraj Kumar
Summary: By introducing a hydroxyl functionality and fine-tuning the properties, the physical and thermal stabilities, as well as energetic performance of high-performing 3,5-dinitro-functionalised bispyrazolymethanes, have been improved.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Christoph Helling, Julia Haak, Christoph Woelper, George E. Cutsail, Stephan Schulz
Summary: In this study, the stepwise synthesis of boryl-substituted antimony compounds was reported, revealing the formation of metal-metal bonds and the changes in electronic structures. The molecular structures and bonding properties were characterized and analyzed in detail through experimental and computational methods. The results showed that the synthesized compounds exhibited unique spin distribution and asymmetric electronic structures.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Juliane Schoening, Christoph Woelper, Stephan Schulz
Summary: We report on the reactions of heteroleptic metallasilylenes with CO2, N2O, and Me3SiN3, resulting in the formation of corresponding carbonate complexes, silanoic esters, and silaimine. In addition, a new compound was synthesized through C-C bond cleavage.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Review
Polymer Science
Eduard Gloeckler, Swarup Ghosh, Stephan Schulz
Summary: This review highlights the ongoing developments in the ring-opening polymerization of lactide and caprolactone using beta-diketiminate and beta-ketoiminate metal complexes. The resulting aliphatic polyesters could serve as sustainable replacements to petrochemicals-based polymers, with potential applications in tissue engineering, bio-medical, and agricultural sciences.
Article
Chemistry, Inorganic & Nuclear
Bin Li, Christoph Woelper, Stephan Schulz
Summary: In this study, the researchers reported on the reaction between a new compound LGa and bromoalkanes, which can achieve C-Br bond activation. Different products can be obtained by changing the molar ratio of reactants. The products were characterized by NMR, IR, and X-ray diffraction.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2023)
Article
Chemistry, Multidisciplinary
Swapnil Varhade, E. B. Tetteh, Sascha Saddeler, Simon Schumacher, H. B. Aiyappa, Georg Bendt, Stephan Schulz, Corina Andronescu, Wolfgang Schuhmann
Summary: Scanning electron microscopy and atomic force microscopy images of droplet landing sites are correlated with the electrocatalytic activity for the oxygen evolution reaction in alkaline electrolyte of hexagonal spinel Co3O4 nanoparticles derived using scanning electrochemical cell microscopy. The turnover frequency (TOF) of surface Co atoms is used to deconvolute the intrinsic catalytic activity of individual crystal facets of the hexagonal Co3O4 spinel particle. The top surface exposing 111 crystal planes showed a thickness-dependent TOF, while the edge of the particle exposing (110) planes showed a higher average TOF and no correlation with particle thickness.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Janis Timoshenko, Felix T. Haase, Sascha Saddeler, Martina Ruescher, Hyo Sang Jeon, Antonia Herzog, Uta Hejral, Arno Bergmann, Stephan Schulz, Beatriz Roldan Cuenya
Summary: By using operando quick X-ray absorption fine structure spectroscopy and unsupervised/supervised machine learning methods, we can unveil the real active species and active states in bimetallic transition-metal oxide catalysts. Through principal component analysis and artificial neural network analysis, we can track the evolution of tetrahedrally and octahedrally coordinated species and understand the chemical changes and phase transitions taking place in CoxFe3-xO4 catalysts.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Inorganic & Nuclear
Bin Li, Hanns Micha Weinert, Christoph Woelper, Stephan Schulz
Summary: Oxidative addition reactions of LZnH with L1Si and L2SiNMe2 yielded L1Si(H)-ZnL (1) and LH2Si(NMe2)ZnL (3), while the reaction with L2SiCl proceeded with H/Cl ligand exchange and the formation of L2Si(H)-Zn(Cl)L (2). Protonation reaction of 1 with H-(OEt2)2BArF4 gave LS(H)-ZnL (4). The nature of the Zn-Si bond in 1-4 was evaluated by quantum chemical calculations, showing that the Si-Zn bond in 1 and 3 is covalent, while those in 2 and 4 are better described as dative bonds.
Editorial Material
Chemistry, Inorganic & Nuclear
Stephan Schulz, Christian Mueller
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2023)
Article
Chemistry, Multidisciplinary
Hanns M. Weinert, Christoph Woelper, Stephan Schulz
Summary: Monovalent group 13 diyls are used as versatile reagents in oxidative addition reactions, and the [1,4]-cycloaddition reactions of these diyls with various 1,2-diketones are reported here. These reactions result in the formation of different compounds, and additional reactions with other compounds such as aldehydes and benzene rings were also studied.
CHEMISTRY-SWITZERLAND
(2023)
Article
Chemistry, Multidisciplinary
Mahendra K. Sharma, Hanns M. Weinert, Bin Li, Christoph Woelper, Justin T. Henthorn, George E. Cutsail III, Gebhard Haberhauer, Stephan Schulz
Summary: Based on DFT calculations, LGa(P2OC)cAAC 2 possesses a delocalized p-type HOMO and p*-type LUMO due to the presence of a 1,2-diphospha-1,3-butadiene moiety. Reaction of 2 with KC8 and dibenzo-18-crown-6 led to the isolation of [LGa(P2OC)cAAC][K(DB-18-c-6)] 3[K(DB-18-c-6] containing the 1,2-diphospha-1,3-butadiene radical anion 3*. Further reactions of 3 with [Fc][B(C6F5)(4)] and TEMPO yielded 2 and [L-HGa-(P2OC)cAAC][K(DB-18-c-6)] 4[K(DB-18-c-6] respectively, with the latter containing the 1,2-diphospha-1,3-butadiene anion 4-. The structures of 2, 3[K(DB-18-c-6], and 4[K(DB-18-c-6] were determined using single crystal X-ray diffraction (sc-XRD).
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Hanns M. Weinert, Yannick Schulte, Alexander Gehlhaar, Christoph Woelper, Gebhard Haberhauer, Stephan Schulz
Summary: This article reports the synthesis and solid-state structures of DMAP-coordinated GaPn complexes, where Pn is Sb and Bi. In addition, the synthesis of base-free dipnictene dications is also reported. Quantum chemical calculations show that the dications 5(2+) and 6(2+) are isoelectronic analogues of the butadiene dication.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Xiaofei Sun, Alexander Hinz, Stephan Schulz, Lisa Zimmermann, Manfred Scheer, Peter W. Roesky
Summary: Insertion and functionalization of gallasilylenes into the cyclo-E-5 rings of [Cp*Fe(?(5)-E-5)] (E = P, As) have been reported. The reaction results in E-E/Si-Ga bond cleavage and the insertion of the silylene in the cyclo-E-5 rings. The isolated complexes represent rare examples of mixed group 13/14 iron polypnictogenides, which can only be synthesized by utilizing the cooperativity of gallatetrylenes.
Article
Chemistry, Multidisciplinary
Mahendra K. Sharma, Hanns M. Weinert, Bin Li, Christoph Woelper, Justin T. Henthorn, George E. Cutsail, Gebhard Haberhauer, Stephan Schulz
Summary: LGa(P2OC)cAAC2 features a unique structure with conjugated HOMO and LUMO. Compounds containing 1,2-diphospha-1,3-butadiene radical and anion were obtained through reactions. The solid-state structures of these compounds were determined by X-ray diffraction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Eduard Gloeckler, Leon Kapp, Christoph Woelper, Marcel Schumacher, Andre H. Groeschel, Stephan Schulz
Summary: In this study, three zinc complexes were synthesized and characterized using various techniques. The results indicated that heteroleptic complex 2 exhibited the highest activity and selectivity in the ring-opening polymerization reaction.
Article
Chemistry, Inorganic & Nuclear
Juliane Schoening, Chelladurai Ganesamoorthy, Christoph Woelper, Ephrath Solel, Peter R. Schreiner, Stephan Schulz
Summary: This study reports the synthesis and characterization of two room-temperature stable main group element carbonyl complexes, as well as their reaction with NH3, demonstrating their potential for small molecule activation.
DALTON TRANSACTIONS
(2022)
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)
