Article
Chemistry, Multidisciplinary
Jiaxin Yuan, Ao Shen, Xiaohui Hao, Man Du, Xiaoyu Du, Shufeng Ma, Mengwen Li, Lifeng Zhang, Yunxu Yang
Summary: In this study, a luminescent Tb3+ cholate hydrogel system was used as a versatile platform for the selective detection of Hg2+ in water and NO2 in air. The PS-BD@Tb3+/hydrogel and PS-BS@Tb3+/hydrogel systems were fabricated, and the smartphone detection platform based on luminescence color changes showed consistent results with the luminescence assay. The PS-BD@Tb3+/hydrogel coated chitosan non-woven fabric efficiently captured and removed Hg2+ in actual water samples.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Jaime Gomez-Morales, Raquel Fernandez-Penas, Francisco Javier Acebedo-Martinez, Ismael Romero-Castillo, Cristobal Verdugo-Escamilla, Duane Choquesillo-Lazarte, Lorenzo Degli Esposti, Yaiza Jimenez-Martinez, Jorge Fernando Fernandez-Sanchez, Michele Iafisco, Houria Boulaiz
Summary: This study successfully prepared luminescent and biomimetic Tb3+-doped citrate-functionalized carbonated apatite nanoparticles, showcasing excellent biocompatibility and luminescence properties for bioimaging applications. These nanoparticles were synthesized using a citrate-based thermal decomplexing precipitation method, with the ability to visualize intracellular uptake without the need for additional fluorescence dyes.
Article
Chemistry, Inorganic & Nuclear
Lei-Lei Li, Yi-Fan Fang, Shuang Liu, Shuang-Shuang Chen, Wen-Zhen Wang
Summary: The low cost is an important factor for the practical application of metal-organic frameworks (MOFs). In this study, we report the synthesis and crystal structure of a Tb-fluoride-oxalate framework, which can be efficiently synthesized under mild conditions using simple and inexpensive organic ligands. The framework exhibits strong green photoluminescence and can be used as a turn-off luminescent sensor for toxic ions in aqueous solution. Additionally, the framework shows good catalytic activity for the cycloaddition reaction of CO2 with epoxides.
INORGANICA CHIMICA ACTA
(2022)
Review
Chemistry, Inorganic & Nuclear
Abhijit Hazra, Udayan Mondal, Sukdeb Mandal, Priyabrata Banerjee
Summary: Supramolecular luminescent frameworks and luminescent metal-organic frameworks have attracted global researchers for their potential applications in toxic analyte detection and anti-counterfeit materials. These materials have shown to be beneficial in the fabrication of security inks and sensory devices through Inkjet Printing technology, aiding in the prevention of counterfeit materials and monitoring of hazardous analytes.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
York E. Serge-Correales, David Neumeyer, Sajjad Ullah, Robert Mauricot, Qilin Zou, Sidney J. L. Ribeiro, Marc Verelst
Summary: In this study, oleic acid-stabilized ZnGa2O4 nanoparticles were successfully synthesized with controlled size and monodispersity. The size and persistent luminescence of the nanoparticles could be further increased using a seed mediated approach. Surface modification strategies involving poly(acrylic acid) or cysteamine in conjunction with BF4- provided long-term colloidal stability and enhanced persistent luminescence.
Article
Agriculture, Dairy & Animal Science
De Xin Dang, Yan Jiao Li, In Ho Kim
Summary: The enzymatic bio-conversion of SB extract showed positive effects on the growth performance, nutrient digestibility, and antioxidative indicators in growing pigs, indicating its potential as an alternative to antibiotics.
Article
Chemistry, Multidisciplinary
Zafar Mahmood, Jia He, Shuqing Cai, Zhanxiang Yuan, Hui Liang, Qian Chen, Yanping Huo, Burkhard Koenig, Shaomin Ji
Summary: This study demonstrates the tuning of the redox potential and excited state properties of a commercially available photocatalyst for the visible-light-mediated photoredox phosphorylation of tertiary aliphatic amines. It also showcases the successful synthesis of alpha-aminophosphinoxides and alpha-aminophosphonates through cross-dehydrogenative coupling reactions using Ru-II complexes as photocatalysts.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Ya-Ming Tian, Evamaria Hofmann, Wagner Silva, Xiang Pu, Didier Touraud, Ruth M. M. Gschwind, Werner Kunz, Burkhard Koenig
Summary: The amino alcohol meglumine solubilizes organic compounds in water and enforces the formation of electron donor acceptor (EDA) complexes, resulting in unique cross-coupling reactions. UV-A photoinduced electron transfer within the EDA complexes leads to the cleavage of halide ions and recombination of arenes, followed by rearomatization and proton loss. UV and NMR measurements demonstrate the significance of the EDA aggregates for the photoinduced reaction. Enforced EDA aggregate formation in water provides new activation modes for organic photochemical synthesis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Michela Marcon, Stefano Crespi, Andreas Pielmeier, Burkhard Koenig
Summary: This study presents the first photoswitchable copper complex with catechol oxidase activity. The Z-configuration, which optimizes the distance between the two copper centers, is found to enhance the catalytic activity for catechol oxidation compared to the E-configuration.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Dominik Birnthaler, Rok Narobe, Eliseo Lopez-Berguno, Christoph Haag, Burkhard Koenig
Summary: Ligand-to-metal charge transfer (LMCT) photo-catalysis enables the activation and utilization of halides and other heteroatoms in metal complexes. The application of bismuth LMCT in organic radical coupling reactions has been expanded, generating chlorine and carboxyl radicals in net-oxidative and redox-neutral photochemical reactions. The study reveals BiCl4- and BiCl52- as the catalytically active bismuth species under 385 nm irradiation, providing insight into the reactivity of the highly reactive bismuth(II) catalyst fragment through cyclic voltammetry and UV-vis studies.
Editorial Material
Electrochemistry
T. A. Karl, M. Seidl, B. Koenig
Summary: An induction-based energy harvesting (EH) device was developed to convert rotational energy into electrical energy for electrochemical transformations. The induced AC voltage could be adjusted by the stirring rate, allowing for constant voltage or constant current output. Experimental results showed the comparability of reactions performed with this EH device and commercial power supplies, demonstrating its potential as a low-cost alternative for electrochemical reactions in labs without specialized equipment.
Article
Electrochemistry
Tobias A. Karl, Max Seidl, Burkhard Koenig
Summary: An induction-based energy harvesting device was developed to convert rotational energy into electrical energy for electrochemical transformations. The device can provide adjustable voltage by adjusting the stirring rate of the reaction. Experimental results showed the comparability of the device with commercial power supplies in various late-stage functionalization reactions, making it a cost-effective alternative for electrochemical reactions in laboratories without specialized equipment.
Article
Chemistry, Multidisciplinary
Ulrike Wirth, Julia Erl, Saphia Azzam, Carina Hoering, Michael Skiba, Ritu Singh, Kathrin Hochmuth, Max Keller, Joachim Wegener, Burkhard Koenig
Summary: Combining photochromic NPY receptor ligands with label-free impedance assays allows observing the cell response to receptor activation and its reversibility over time.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Multidisciplinary Sciences
Indrajit Ghosh, Nikita Shlapakov, Tobias A. Karl, Jonas Dueker, Maksim Nikitin, Julia V. Burykina, Valentine P. Ananikov, Burkhard Koenig
Summary: Adaptive dynamic homogeneous catalysis (AD-HoC) with nickel under visible-light-driven redox reaction conditions allows for general C(sp(2))-(hetero)atom coupling reactions with various nucleophiles. The self-adjustive nature of the catalytic system simplifies the classification and optimization process, resulting in predictable reaction conditions and hundreds of synthetic examples.
Article
Chemistry, Multidisciplinary
Pascal Puellmann, Dominik Homann, Tobias A. Karl, Burkhard Koenig, Martin J. Weissenborn
Summary: Fungal unspecific peroxygenases (UPOs) have attracted attention as versatile oxyfunctionalization catalysts with impressive catalytic capabilities. However, their sensitivity towards co-substrate hydrogen peroxide poses a challenge. This study introduces the concept of light-dependent UPO biocatalysis with genetically encoded flavin-containing photosensitizer proteins for in situ hydrogen peroxide production, enabling efficient catalysis setups and the extraction of enantiomerically pure alcohol products.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Applied
Evamaria Hofmann, Pierre Degot, Didier Touraud, Burkhard Koenig, Werner Kunz
Summary: The demand for natural vanilla extract, specifically vanillin, is much higher than current production due to the labor-intensive process of vanilla bean cultivation and vanillin extraction. To meet this demand, most vanillin used today is synthetically produced, contrary to the trend towards bio-based products. This study focuses on synthesizing nature-based vanillin from the more accessible rhizomes of Curcuma longa, which also produces vanillic acid and p-hydroxybenzaldehyde found in natural vanilla beans. Visible light and food-grade chemicals are utilized for the extraction and conversion of curcuminoids to flavors. The use of a binary mixture of ethanol and triacetin, as well as a surfactant-free microemulsion consisting of water, ethanol, and triacetin, achieves extraction results exceeding those reported in the literature for Soxhlet extraction of vanilla beans by a factor of more than 7.
Article
Chemistry, Physical
Jonas Dueker, Indrajit Ghosh, Burkhard Koenig
Summary: The development of predictable methods to increase molecular complexity is crucial in modern organic chemistry for synthesizing multifunctionalized (het)arenes. In this study, we report reaction conditions under adaptive dynamic homogeneous catalysis (AD-HoC) that allow for the introduction of functional groups onto (het)aromatic scaffolds, resulting in increased molecular complexity and controlled construction of diverse molecules. The use of photoredox reaction conditions in AD-HoC also offers versatility and selectivity, particularly in reactions involving pyrimidines. The simplicity and predictability of AD-HoC reaction conditions, along with the benefits of photoredox chemistry, make it an appealing choice for researchers aiming to create complex molecules.
Article
Chemistry, Physical
Daniel Kolb, Ahmad A. Almasalma, Martin Morgenstern, Leon Ganser, Isabel Weidacher, Burkhard Koenig
Summary: In this study, a photocatalytic dehydroformylation sequence for the conversion of benzyl alcohols to arenes is reported. The method involves the initial dehydrogenation of benzyl alcohols to benzaldehydes, followed by a decarbonylation step to yield arenes. Mechanistic studies indicate that the transformation proceeds through a stepwise radical pathway, generating concomitant syngas (CO+H2).
Article
Chemistry, Multidisciplinary
Daniel Kolb, Martin Morgenstern, Burkhard Koenig
Summary: We introduce a mild alternative to thermally-driven noble-metal catalyzed decarbonylation protocols for the defunctionalization of benzaldehydes in short reaction times. Our cooperative photocatalytic system involves thioxanthone as an inexpensive HAT-agent and a cobalt complex required for selective C(sp(2))-C(sp(2)) bond cleavage. The generated acyl and phenyl intermediates are postulated to be stabilized as cobalt complexes.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Jose A. C. Delgado, Ya-Ming Tian, Michela Marcon, Burkhard Koenig, Marcio W. Paixao
Summary: The study introduces metallaphotocatalysis in solid-phase peptide synthesis for the selective introduction of C-N bond in peptides containing tryptophan, expanding new approaches for modifying aromatic side chains in biologically active peptide sequences.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Vincent George, Burkhard Koenig
Summary: Prompted by the increasing interest in strained hydrocarbons as potential drug candidates, the researchers developed a simple and efficient photochemical protocol for the synthesis of (spiro)cyclopropanes from stable tosylhydrazones and electron-poor olefins. This protocol involves a two-step one-pot transformation using donor-donor diazo compounds and subsequent nitrogen extrusion of the intermediate UΔ1-pyrazoline. Notably, kinetic analysis allowed for the isolation of intermediate spiro-heterocycles.
CHEMICAL COMMUNICATIONS
(2023)
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)
