Article
Materials Science, Multidisciplinary
Wouter Heyvaert, Adrian Pedrazo-Tardajos, Ajinkya Kadu, Nathalie Claes, Guillermo Gonzalez-Rubio, Luis M. Liz-Marzan, Wiebke Albrecht, Sara Bals
Summary: Chirality in inorganic nanoparticles and nanostructures has attracted increasing scientific interest due to their ability to interact differently with circularly polarized light. Quantifying the degree of chirality in objects of nanoscale is challenging, but the authors introduce a methodology based on helical geometrical properties to quantify the helicity of complex chiral nanomaterials. They demonstrate that analyzing individual particles can provide significant insights into the origin of chiroptical properties.
ACS MATERIALS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Robin Ammenhaeuser, John M. Lupton, Ullrich Scherf
Summary: Helical ladder polymers are designed by connecting planar indenofluorene chromophores with chiral triptycene linkers to achieve chiral amplification. By transitioning from a model dimer to a polymeric helical ladder structure, the chiroptical anisotropy values increase by almost sevenfold, indicating the observed chiral amplification on the molecular, single-chain level.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Qing Tong, Shubo Wang
Summary: Researchers applied the phenomenon of helical dichroism to acoustics and found that a lattice of chiral resonators can induce differential absorption of acoustic vortices. Breaking the rotation symmetry leads to coupling between resonators, resulting in OAM band gaps and non-Hermitian exceptional points that significantly enhance helical dichroism. This discovery has important applications in acoustic OAM manipulations and chiral sound-matter interactions.
Article
Chemistry, Physical
Darius Abramavicius, Serguei Krouglov, Virginijus Barzda
Summary: The microscopic theory for second harmonic generation in a helical molecular system is developed, including non-local interaction effects. The response is derived to isolate the quadratic coupling terms, denoted as the K coupling, which reveal system inhomogeneities. Dipolar and quadrupolar contributions reflect system symmetry and homogeneity.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Biochemistry & Molecular Biology
Huimin Duan, Jiawei Li, Jiadan Xue, Dongming Qi
Summary: A series of alanine-based coil copolymers were synthesized and their complexes with metal ions exhibited enhanced helical chirality through coordination. The formation of helical molecular orbitals was triggered by the coordination with copper ions. This study provides important insights into the enhancement of helical chirality in self-assembly and offers a new strategy for studying homochiral amplification in biological supramolecular systems.
Article
Polymer Science
Yang Zhao, Jingfa Yang, Minghua Liu, Jiang Zhao
Summary: Switchable inversion of chirality between opposite handedness by varying pH is found in a histidine pendant polymer, PBHis. This phenomenon is demonstrated by circular dichroism and fluorescence correlation spectroscopy, which measure the changes of hydrodynamic radius at the single molecular level. Below pH 8.0, the polyelectrolyte adopts M-helicity, while above pH 8.0, it changes into P-helicity. Above pH 10.6, the helicity further inverses into M-chirality. The protonation and deprotonation of the imidazole group, as well as the hydroxide-ion-mediated hydrogen bonding, determine the mutual orientation and handedness of the helical structure.
Article
Chemistry, Multidisciplinary
Peizhao Liu, Yann Battie, Yutaka Okazaki, Naoya Ryu, Emilie Pouget, Sylvain Nlate, Takashi Sagawa, Reiko Oda
Summary: Helical and twisted silica nanoribbons deposited on a quartz substrate exhibit chiral optical scattering, with the g-factor of helical nanoribbons being approximately 10(-2) below 250 nm. The signs of chiral optical scattering depend on the handedness of the nanohelices, and simulations using the boundary element method investigated the effect of helix morphology and orientation on the scattering.
CHEMICAL COMMUNICATIONS
(2021)
Article
Biochemistry & Molecular Biology
Lucia De Rosa, Donatella Diana, Rossella Di Stasi, Alessandra Romanelli, Michele F. M. Sciacca, Danilo Milardi, Carla Isernia, Roberto Fattorusso, Luca D. D'Andrea
Summary: Replacing leucine 10 in the QK peptide with different hydrophobic amino acids leads to changes in helical content and thermal stability, depending on the type of interaction that could be established between Leu7 and the residue in position 10. Interestingly, the changes in helical content and thermal stability are not always correlated, highlighting the complex nature of these interactions.
BIOORGANIC CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Michiya Fujiki, Shun Okazaki, Nor Azura Abdul Rahim, Takumi Yamada, Kotohiro Nomura
Summary: This study investigated whether two types of chiroptical amplifications occur when copolymer encounter homopolymer in co-colloids, and found noticeable chiroptical inversion in some cases. The asymmetric features and differences in hydrodynamic sizes were believed to originate from the non-mirror-symmetrical main-chain stiffness of HCPSs in solution.
Article
Polymer Science
Hiromasa Yamamoto, Takuya Inagaki, Jinwoo Park, Satoru Yoshida, Kosuke Kaneko, Tomonori Hanasaki, Kazuo Akagi
Summary: The study achieved radical photocrosslinking polymerizations of functional acrylate derivatives in a chiral liquid crystal medium, resulting in helical network polymers with high chiroptical properties. The polymer films showed unique textures and circular dichroism effects, with increased circularly polarized luminescence intensity after thermal treatment.
Article
Optics
Jean-Luc Begin, Ashish Jain, Andrew Parks, Felix Hufnagel, Paul Corkum, Ebrahim Karimi, Thomas Brabec, Ravi Bhardwaj
Summary: Chiral interactions are prevalent in nature, and the use of linearly polarized helical light beams as chiral reagents demonstrates efficient chiral sensitivity. Nonlinear absorption of helical light beams offers a new chiroptical detection scheme for both chiral and achiral molecules in liquid phase.
Article
Chemistry, Multidisciplinary
Guangmin Li, Xihao Zhang, Xuening Fei, Jiafeng Li, Hongfei Liu, Wei Liu, Yang Yang, Bingjing Li, Mingrui Liu, Gaoling Yang, Ti Zhang
Summary: In this study, chiral ligand-conjugated quantum dots were fabricated for inducing apoptosis in cancer cells. The circular dichroism signals of chiral quantum dots were found to effectively distinguish cancer cells from normal cells. The experimental results demonstrated the significant apoptosis-inducing ability of the chiral quantum dots and their potential as targeted anti-cancer agents.
Article
Chemistry, Multidisciplinary
Hebing Hu, Sribharani Sekar, Wenbing Wu, Yann Battie, Vincent Lemaire, Oriol Arteaga, Lisa Poulikakos, David J. Norris, Harald Giessen, Gero Decher, Matthias Pauly
Summary: The study demonstrated that nonchiral 1D nano-objects can be assembled into scalable chiral Bouligand nanostructures with controlled mesoscale anisotropy, achieving very high circular dichroism and giant dissymmetry factors. Through Layer-by-Layer assembly and simple macroscopic tools, the chiroptical properties of the chiral multilayer stack were successfully modeled.
Article
Chemistry, Multidisciplinary
Peizhao Liu, Yann Battie, Takaki Kimura, Yutaka Okazaki, Piyanan Pranee, Hao Wang, Emilie Pouget, Sylvain Nlate, Takashi Sagawa, Reiko Oda
Summary: Helical perovskite nanocrystals (H-PNCs) were grown inside nanometric helical porous silica, with their handedness determined by the templates. The H-PNCs exhibit strong induced circular dichroism (CD) and circularly polarized luminescence (CPL) signals, with high dissymmetry g-factors. The circular dichroism originates from the chiral shape of the H-PNCs, as demonstrated by simulations.
Article
Chemistry, Physical
Ashish Jain, Jean-Luc Begin, Ravi Bhardwaj
Summary: A novel chiroptical sensing technique using the helical phase of structured light as a chiral reagent was introduced. This technique can differentiate enantiopure chiral liquids by their differential absorbance of helical light, which is significantly higher compared to conventional linear techniques. The origin of the helicity dependent absorption is explained in terms of induced multipole moments in nonlinear light-matter interaction, opening up possibilities for using helical light as a primary chiral reagent in nonlinear spectroscopic techniques.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Medicinal
Yanan Tang, Lijia Liu, Junpei Suzuki, Masahiro Teraguchi, Takashi Kaneko, Toshiki Aoki
Summary: This study introduces a novel optical resolution method using circularly polarized light (CPL) without any optical resolution agents. By serially connecting two enantioselective reactions, the developed method shows high optical and chemical yields and can be applied to a wide range of racemic compounds.
Article
Polymer Science
Takeshi Namikoshi, Yuhei Watanabe, Ayaka Kaneda, Kazuma Ishikawa, Shinji Watanabe, Miki Murata
Summary: The living cationic polymerizations of sulfide-containing vinyl ethers were investigated, revealing that the nucleophilicity of the sulfur moiety influenced the polymerization process. Specifically, PSEVE polymerized smoothly while MSPEVE did not form cyclic sulfonium species during the reaction.
MACROMOLECULAR RESEARCH
(2022)
Correction
Polymer Science
Guanwu Yin, Takeshi Namikoshi, Masahiro Teraguchi, Takashi Kaneko, Toshiki Aoki
Correction
Polymer Science
Guanwu Yin, Takeshi Namikoshi, Masahiro Teraguchi, Takashi Kaneko, Toshiki Aoki
Article
Polymer Science
Guanwu Yin, Takeshi Namikoshi, Masahiro Teraguchi, Takashi Kaneko, Toshiki Aoki
Summary: In this study, five types of absolute asymmetric polymerizations were achieved, resulting in soluble high molecular weight chiral polymers without the use of chiral compounds or circularly polarized light. This new mechanism provides clues for a better understanding of the origin of chirality in our world.
Article
Polymer Science
Takeshi Namikoshi, Tamotsu Hashimoto, Naoto Shikano, Michio Urushisaki, Toshikazu Sakaguchi
Summary: This study synthesized a vinyl ether containing a cyclic carbonate group and formed hydroxyurethane polymers through reaction with alkanolamines. The results demonstrated that the hydroxyurethane polymers had different solubilities and thermal stabilities at different temperatures.
Article
Polymer Science
Yu Zang, Kana Matsui, Jianjun Wang, Masahiro Teraguchi, Takashi Kaneko, Toshiki Aoki
Summary: This study synthesized multistranded copolymers through selective polymerization and postpolymerization reactions. The copolymers exhibited different conformations and could be used as self-standing membranes with high oxygen permselectivity.
Article
Polymer Science
Kehan Cheng, Takaya Ohno, Masahiro Teraguchi, Takashi Kaneko, Toshiki Aoki
Summary: New types of multi-stranded graft copolymers (AGSs) with good permeability and permselectivity were synthesized by selective three-step polymerization, possibly due to the formation of micropores and ultramicropores.
Article
Polymer Science
Liang Xu, Yu Zang, Kyousuke Takata, Boyu Jing, Jianjun Wang, Masahiro Teraguchi, Takashi Kaneko, Fengjuan Miao, Toshiki Aoki
Summary: This paper addresses the solubility issue of fully conjugated polyazomethines (PAZs) by introducing short lengths of oligodimethylsiloxane (ODMS) grafts at the ends. The resulting soluble PAZs were used to fabricate PAZs/PDMS mixed-matrix membranes (MMMs) with excellent oxygen permeability.
POLYMER INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Yoshinori Sato, Masahiro Teraguchi, Toshiki Aoki, Takashi Kaneko
Summary: Poly(9,10-anthryleneethynylene)s bearing benzyl ether dendrimers with alkoxy peripheral groups were synthesized by polymerization and showed ordered aggregation state in solution.
Article
Chemistry, Multidisciplinary
Jia Shi, Taisei Yashiro, Masahiro Teraguchi, Takashi Kaneko, Toshiki Aoki
Summary: In this study, a series of fully conjugated polymers with a rigid backbone consisting of (di)ethynylene and phenylene groups and alkyl side groups were synthesized by Glaser or Sonogashira coupling polycondensation. Some of these polymers formed self-supporting membranes, and their oxygen permselectivities were found to be influenced by the alkyl groups. The oxygen permselectivities of polymers containing diynes in the main chain were determined for the first time.
Article
Polymer Science
Chenxi Xu, Shintaro Hosono, Shunya Narita, Masahiro Teraguchi, Takashi Kaneko, Toshiki Aoki
Summary: We successfully prepared supramolecular polymers with self-membrane forming ability using a highly selective photocyclic aromatization (the SCAT reaction). However, the mechanical strengths of the membranes were not sufficient for oxygen permeation, making it difficult to estimate their oxygen permselectivities. In this study, we obtained oxygen permselectivities for pure supramolecular polymer membranes prepared on porous supports for the first time. Surprisingly, these membranes exhibited higher oxygen permselectivities compared to their conventional polymer counterparts, which was attributed to their denser and less defected structures. The supramolecularly-bonded main chains in these pure supramolecular polymers played a similar role as the covalently-bonded main chains in conventional polymers during permeation.
Article
Polymer Science
Zhichun Shi, Jiaxiang Wen, Yingnan Zhao, Jianjun Wang, Jun Li, Ming Zhao, Masahiro Teraguchi, Toshiki Aoki, Takashi Kaneko
Summary: A novel substituted phenylacetylene with a pendant betulin derivative group was successfully designed and synthesized. The structure of the monomer was confirmed using various spectroscopic techniques. The resulting polymer exhibited a strong Cotton effect in the circular dichroism spectra, indicating the formation of a one-handed helical backbone induced by the chiral source on the side chain. The rigid betulin derivatives in the polymer also contributed to its porous morphology and thermal stability.
Article
Polymer Science
Chenxi Xu, Shuaishuai Huang, Shunya Narita, Michiru Shibata, Nennei Nagaoka, Masahiro Teraguchi, Takashi Kaneko, Toshiki Aoki
Summary: Quantitative synthesis of supramolecular polymers (SPs) was achieved using selective photocyclic aromatization reaction of poly(substituted phenylacetylene)s (CPs); The structures and properties of the resulting SPs were strongly influenced by those of the precursor CPs; By controlling the structures and properties of the CPs, SPs with desired properties, such as enantioselective permeability and supramolecular chirality, can be obtained.
Article
Chemistry, Inorganic & Nuclear
Masoume Malmir, Majid M. Heravi, Zahra Yekke-Ghasemi, Masoud Mirzaei
Summary: In this study, a tri-component composite consisting of Fe3O4 nanoparticles, Keggin-type polyoxometalate, and graphene oxide was prepared and investigated as a catalyst for the oxidation of sulfides to sulfoxides. The catalyst showed excellent stability, high yields, and recyclability, making it a promising choice for organic-inorganic hybrid catalytic reactions conducted under mild conditions.
Article
Chemistry, Inorganic & Nuclear
Samuel D. Juarez-Escamilla, Sriloy Dey, Bruno Donnadieu, T. Keith Hollis
Summary: In this study, a bidentate Mo complex was synthesized using metalation and transmetalation methodology. The synthesis was optimized to achieve a high yield. The crystal structure of the bidentate complex was determined. Additionally, alternative forms of ligands were discovered in the reaction.
Article
Chemistry, Inorganic & Nuclear
Mohamed H. Abdel-Rhman, Ghada Samir, Mostafa A. Hussien, Nasser M. Hosny
Summary: This study investigated the dissolution performance of hydrazine carbonate solution on zirconium dibutyl phosphate (Zr-DBP), and found that hydrazine carbonate solution could promote the dissolution of Zr-DBP. The effects of dissolution temperature and hydrogen peroxide concentration on the dissolution efficiency were also explored, and the corrosion effect on stainless steel by hydrazine carbonate solution was studied.
Article
Chemistry, Inorganic & Nuclear
Qiaofang Fu, Fangyu Tan, Wu Ying
Summary: This study successfully prepared vermiculite/g-C3N4/TiO2 composites and found that under specific conditions, the composites exhibited excellent degradation effects, with a high degradation rate for methylene blue. Additionally, the composites were able to enhance surface area, reduce carrier loading rate, improve light energy utilization, and enhance durability.
Article
Chemistry, Inorganic & Nuclear
Annabelle G. W. Hodson, Robert T. Mason
Summary: Functionalised polystyrene resins have been found to be efficient catalysts in the synthesis of specific complexes, with the conversion rate controlled by the polymer structure. The addition of amines or amino acids can further yield substituted 13-butadienyl complexes, which have been analyzed by NMR.
Article
Chemistry, Inorganic & Nuclear
C. Kavitha, S. Anbarasan, P. Subramaniam
Summary: The sulfoxidation of PMAAs by the oxo(salen)chromium(V) complex in aqueous acetonitrile medium was studied. The rate of the reaction is influenced by the polarity of the medium and the substituents on PMAA, with electron donating substituents accelerating the reaction and electron withdrawing substituents retarding the reaction.
Article
Chemistry, Inorganic & Nuclear
Qiang-Qiang Liu, Mithun Kumar Ghosh, Shu-Lan Cai, Xiao-Hong Liu, Lu Lu, Mohd. Muddassir, Tanmay Kumar Ghorai, Jun Wang
Summary: Three newly developed coordination polymers (CPs) with semiconducting properties were synthesized using hydrothermal methods. These CPs exhibit superior photocatalytic activity and can degrade organic pollutants effectively.
Article
Chemistry, Inorganic & Nuclear
Mehrnaz Aliahmadi, Ali Nemati Kharat, Jan Janczak
Summary: This study proposes a method for synthesizing allyl alcohol using cost-effective and renewable bio-resource glycerol. By utilizing catalysts, alcohol as a solvent, and a reducing agent, allyl alcohol with an efficiency of 100% was obtained. The structures of the newly synthesized complexes were determined using X-ray single crystallography.
Article
Chemistry, Inorganic & Nuclear
Ji-Yan Gao, Nan Zhang, Dong-Sheng Huang, Xiang-Rong Liu, Zai-Wen Yang, Shun-Sheng Zhao
Summary: Two new transition metal complexes I and II were synthesized and characterized. The complexes exhibited strong thermal stabilities and showed effective binding to CT-DNA and BSA. Complex II exhibited stronger inhibition activity against P. aeruginosa than gentamicin sulfate. These complexes have potential applications in drug research.
Article
Chemistry, Inorganic & Nuclear
Rishabh Ujjval, Hilal Ahmad Khan, Chinnappan Sivasankar, Natesan Thirupathi
Summary: In this study, a rigid 2-aminobenzimidazole type guanidine and its platinum complexes were synthesized through a series of reactions and characterized by various physical and chemical methods. The reaction mechanism was also explained through DFT calculations.
Article
Chemistry, Inorganic & Nuclear
Marcelo Carpes Nunes, Thais Zaboenco, Vinicius Kemper Melara, Gabriel Barros Baptistella, Andre Luiz Barboza Formiga, Andersson Barison, Fabio Souza Nunes
Summary: A new luminescent molecular thermometer has been developed, which uses the spin-crossover equilibrium of a nickelcyclen derivative to measure temperature. The sensor shows high sensitivity and accuracy.
Article
Chemistry, Inorganic & Nuclear
Yuyu Shan, Zhenqin Zhao, Xia Zhang, Zhan Wu, Xiu-Ling Li
Summary: In this study, a new bridging ligand was synthesized through refluxing, and two mononuclear Cu(I) complexes and two trinuclear Cu(I)-Eu(III) complexes were obtained through self-assembly. The Cu(I) antenna chromophores successfully transferred energy to the Eu(III) centers, achieving sensitized Eu(III) luminescence.
Article
Chemistry, Inorganic & Nuclear
Gabriela Sanchez-Lecuona, Mayra C. Vazquez-Nunez, Bruno Donnadieu, Miguel A. Munoz-Hernandez, Virginia Montiel-Palma
Summary: The reaction of RuHCl(PPh3)3 with GaMe3 has been studied and the obtained complexes were analyzed in detail. The results indicate the formation of a Ru-Ga bond, suggesting the generation of an in situ formed ambiphilic phosphinogallyl ligand. This is of significance for understanding the interaction between metal-halogen bonds and metal-small molecule bonds.
Article
Chemistry, Inorganic & Nuclear
Sevil Sener, Nursel Acar, Fatih Dumludag
Summary: The synthesis, characterization, spectroscopic and bonding features of a new Co (II) phthalocyanine compound containing two thiocarbohydrazone groups were explained. The compound showed semiconductor properties and potential as a temperature sensor.
Article
Chemistry, Inorganic & Nuclear
Ledja B. O. Davi, Aryanna S. P. N. Costa, Mariana S. Silva, Adriana S. Ribeiro, Cintya D. A. E. S. Barbosa, Julio C. S. Da Silva, Dimas J. P. Lima, Daniela S. Anunciacao
Summary: In this study, a dansyl derivative sensor called o-PDDS was prepared and used for the detection of Al3+ ions in water. The o-PDDS sensor exhibited high sensitivity and linear response towards Al3+ ions. Experimental and computational studies confirmed a 1:1 stoichiometry ratio between o-PDDS and Al3+ ions. Real sample analysis demonstrated the selectivity and detection performance of the sensor, indicating its potential for field use.
