Article
Polymer Science
Ping Hsun Lo, Xiaosong Wang
Summary: In this study, migration insertion polymerization (MIP) of organometallic monomers was performed under various conditions. The results showed that the oligomerization occurred in accompany with monomer cyclization, generating small rings at the early stage and macrocycles at a later stage. The cyclization rate was significantly accelerated at a higher MIP temperature. The dependence of degree of polymerization on the MIP conditions was discussed, and the self-assembly behavior of the resulting compounds was examined.
Article
Chemistry, Multidisciplinary
Mohamed Elagawany, Lingaiah Maram, Bahaa Elgendy
Summary: The study presents a novel method for synthesizing benzotriazolyl alkyl esters from N-acylbenzotriazoles and dichloromethane under mild conditions. This reaction demonstrates the versatility of using DCM as a methylene building block in carbon-heteroatom bond formation.
Article
Chemistry, Inorganic & Nuclear
Ke Lou, Qingyang Zhou, Qi Wang, Xingchao Fan, Xiufang Xu, Chunming Cui
Summary: Efficient hydrosilylation of ketones and aldehydes was achieved using [KCpFe(CO)(2)] and [NEt4][CpFe(CO)(2)], leading to synthesis of tris- and bis(alkoxy)silanes with excellent yields depending on carbonyl compound substituents. This catalyst is among the most efficient and practical iron catalysts for hydrosilylation with a TOF up to 24,540 h(-1).
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Physical
Shaifali, Pushkar Mehara, Ashish Kumar, Pralay Das
Summary: An efficient method for the synthesis of 2-aryl quinazolinones from 2-iodoacetanilides using ammonium carbamate, ammonium carbonate, and oxalic acid under heterogeneous Pd/C catalyzed conditions has been successfully demonstrated. The reactions exhibited good functional group tolerance and delivered the desired products with great diversity. The heterogeneous Pd/C catalyst showed recyclability for up to four consecutive runs without significant loss of catalytic activity.
Article
Chemistry, Inorganic & Nuclear
Regina Drescher, Leonie Wust, Cornelius Mihm, Ivo Krummenacher, Alexander Hofmann, James Goettel, Holger Braunschweig
Summary: In this study, synthesis of five aluminafluorene derivatives with diverse aluminium substituents was reported, and their Lewis acid properties and reactivity were probed. It was found that 9-bromo-9-aluminafluorene readily forms Lewis acid-base adducts with N-heterocyclic carbenes, cyclic (alkyl)(amino)carbenes, and pyridines, and undergoes a selective ring expansion reaction with iminoborane tBuN-BMes to give a boron-nitrogen analogue of alumepins.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Rashmi V. Shenoy, Peter G. Jones, Jose Vicente, Eloisa Martinez-Viviente
Summary: The tribrominated arenes can react with [Pd(dba)(2)] in the presence of phosphine to form palladated complexes. The reaction can also yield dipalladated and tripalladated complexes.
DALTON TRANSACTIONS
(2023)
Article
Multidisciplinary Sciences
Cheng Zhu, N. Fabian Kleimeier, Andrew M. Turner, Santosh K. Singh, Ryan C. Fortenberry, Ralf Kaiser
Summary: Geminal diols, organic molecules with two hydroxyl groups on the same carbon atom, are recognized as important reactive intermediates in physical (organic) chemistry and atmospheric science. In this study, methanediol, the simplest geminal diol, was prepared and detected for the first time. The gas-phase stability of methanediol was confirmed, revealing its significant role as a sink for aldehydes and ketones in atmospheric environments. This research provides insight into the chemistry and properties of geminal diols.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Polymer Science
Takahiro Kawatsu, Jun-Chul Choi, Kazuhiko Sato, Kazuhiro Matsumoto
Summary: A series of compounds with uniformly sized and sequence-defined at the atomic level were successfully synthesized through a series of catalytic reactions.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Chemistry, Organic
Yun-Tao Zheng, Jinshuai Song, Hai-Chao Xu
Summary: Indole is commonly found in bioactive compounds and natural products. A new electrocatalytic method has been developed for the synthesis of indoles through dehydrogenative cyclization of 2-vinylanilides, providing a speedy and efficient access to 3-substituted and 2,3-disubstituted indoles without the need for external chemical oxidants.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Fabian Schorr, Nils Schopper, Nicolas Riensch, Felipe Fantuzzi, Marco Neder, Rian D. Dewhurst, Torsten Thiess, Tobias Brueckner, Kai Hammond, Holger Helten, Maik Finze, Holger Braunschweig
Summary: Novel alkynyl-functionalized diarylbis(dimethylamino)diboranes(4) were prepared by salt metathesis, and their appended alkynyl groups underwent hydroboration to yield discrete boryl-appended diborane(4) species when reacted with monohydroboranes. Conversely, reactions with dihydroboranes led to the formation of oligomeric species with B-B bonds, with some exhibiting good air stability and solubility in common organic solvents. These oligomeric species, characterized by NMR, vibrational spectroscopy, and size-exclusion chromatography, can contain up to ten repeat units.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Polymer Science
Xiaosong Wang, Ping Hsun Lo
Summary: Organometallic macromolecules (OM) are a group of metal-containing polymers that are formed from the convergence of organometallic chemistry and polymer science. Challenges arise due to the reactivity and air-sensitivity of most organometallic complexes, leading to undesired reactions and degradation of the resultant polymers. To address this, various approaches have been developed to create well-characterized and processible metal carbonyl OM, which exhibit interesting self-assembling behavior and potential material applications.
Article
Chemistry, Organic
Wanlong Xiao, Fang Li, Xiaohua Liu, Weidi Cao, Xiaoming Feng
Summary: A catalytic asymmetric tandem cyclization of azadienes and ortho-alkynylnaphthols accelerated by a chiral N,N'-dioxide-gadolinium(III) complex is reported. This method allows the synthesis of 1,2-dihydrobenzofuro[3,2-b]pyridines containing both axially and centrally chiral elements in high yields and excellent stereoselectivities.
Review
Chemistry, Organic
Douglass F. Taber
Summary: Direct functionalization of unactivated C-H bonds is becoming increasingly important in organic synthesis. Among the various methods, intramolecular alkylidene C-H insertion, which retains the absolute configuration, is one of the most versatile. This Review explores all examples of the use of intramolecular alkylidene C-H insertion in natural product synthesis.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Doaa R. Ramadan, Francesco Ferretti, Fabio Ragaini
Summary: This paper describes a palladium/phenanthroline catalyzed reductive cyclization of o-nitrobiphenyls to 9H-carbazoles operated by in situ released CO. The presence of phenyl formate is essential to avoid the use of high-pressure equipment and allows the reaction to be performed in a single thick-walled glass tube. The selectivity of the reaction is influenced by the identity of the base catalyzing the formate decomposition, and the stability of the catalyst is affected by the presence of chloride anions. The optimized catalytic system exhibits excellent stability and tolerance to moisture and air, enabling the reaction to be conducted with low catalyst loadings.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Organic
Kai-Wen Hu, Xiao You, Xiaoan Wen, Haoliang Yuan, Qing-Long Xu, Zengwei Lai
Summary: An efficient and environmentally friendly method for synthesizing thiazolidine-2-imine and oxazolidine-2-one derivatives has been developed. The method utilizes [3 + 2] annulation reactions to achieve good to excellent yields of the desired products. The strategy can be performed on a gram scale and is tolerant of a wide range of functional groups.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Christian Haffner, Wolfgang Heni, Delwin L. Elder, Yuriy Fedoryshyn, Nikola Dordevic, Daniel Chelladurai, Ueli Koch, Kevin Portner, Maurizio Burla, Bruce Robinson, Larry R. Dalton, Juerg Leuthold
OPTICAL MATERIALS EXPRESS
(2017)
Article
Multidisciplinary Sciences
Christian Haffner, Daniel Chelladurai, Yuriy Fedoryshyn, Arne Josten, Benedikt Baeuerle, Wolfgang Heni, Tatsuhiko Watanabe, Tong Cui, Bojun Cheng, Soham Saha, Delwin L. Elder, Larry. R. Dalton, Alexandra Boltasseva, Vladimir M. Shalaev, Nathaniel Kinsey, Juerg Leuthold
Article
Chemistry, Physical
Andrew Ritchie, Shaylin Eger, Chelsey Wright, Daniel Chelladurai, Cuyler Borrowman, Weine Olovsson, Martin Magnuson, Jai Verma, Debdeep Jena, Huili Grace Xing, Christian Dubuc, Stephen Urquhart
APPLIED SURFACE SCIENCE
(2014)
Article
Optics
Daniel Chelladurai, Michael Doderer, Ueli Koch, Yuriy Fedoryshyn, Christian Haffner, Juerg Leuthold
Article
Multidisciplinary Sciences
Christian Haffner, Andreas Joerg, Michael Doderer, Felix Mayor, Daniel Chelladurai, Yuriy Fedoryshyn, Cosmin Ioan Roman, Mikael Mazur, Maurizio Burla, Henri J. Lezec, Vladimir A. Aksyuk, Juerg Leuthold
Article
Chemistry, Multidisciplinary
Andreas Messner, Pascal A. Jud, Joel Winiger, Marco Eppenberger, Daniel Chelladurai, Wolfgang Heni, Benedikt Baeuerle, Ueli Koch, Ping Ma, Christian Haffner, Huajun Xu, Delwin L. Elder, Larry R. Dalton, Jasmin Smajic, Juerg Leuthold
Summary: The study introduced a plasmonic platform with efficient broadband metallic fiber-to-chip couplers for high-speed electro-optic modulators. Through vertically arranged layer stack and simple fabrication process, new modulator devices with wide bandwidth and high-speed data transmission performance were successfully fabricated.
Article
Engineering, Electrical & Electronic
M. Kohli, D. Chelladurai, A. Messner, Y. Horst, D. Moor, J. Winiger, T. Blatter, T. Buriakova, C. Convertino, F. Eltes, M. Zervas, Y. Fedoryshyn, U. Koch, J. Leuthold
Summary: This paper presents a high-speed plasmonic barium titanate (BTO, BaTiO3) Mach-Zehnder modulator. The modulator combines nanoscale plasmonics with BTO as solid-state active material and silicon nitride (SiN) for waveguiding, and integrates them in a monolithic platform. Experimental results show that the modulator has a flat electro-optic frequency response up to 70 GHz and a low V pi L product of 144 V mu m. The modulator can achieve data rates of 216 Gbit/s with a 216GBd 2PAM signal and 256 Gbit/s with a 128GBd 4PAM signal. The integration of the silicon nitride platform with high-speed plasmonics using BTO is a promising solution for future Tb/s optical interconnect platforms.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
M. Doderer, K. Keller, J. Winiger, M. Baumann, A. Messner, D. Moor, D. Chelladurai, Y. Fedoryshyn, J. Strait, A. Agrawal, M. Parzefall, L. Novotny, H. J. Lezec, J. Leuthold, C. Haffner
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
M. Doderer, M. Parzefall, A. Joerg, D. Chelladurai, N. Dordevic, Y. Fedoryshyn, A. Agrawal, H. J. Lezec, L. Novotny, J. Leuthold, C. Haffner
2019 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Christian Haffner, Andreas Joerg, Felix Mayor, Michael Doderer, Daniel Chelladurai, Yuriy Fedoryshyn, Maurizio Burla, Cosmin Roman, Juerg Leuthold
2019 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Antonio La Porta, Roger Dangel, Daniel Jubin, Norbert Meier, Daniel Chelladurai, Folkert Horst, Bert Jan Offrein
2016 IEEE 66TH ELECTRONIC COMPONENTS AND TECHNOLOGY CONFERENCE (ECTC)
(2016)