Article
Chemistry, Physical
Reda Hassanien, Zeinab A. Hassan, Waleed Al-Assy, Samia M. Ibrahim
Summary: This study investigated the highly efficient removal of toxic thymol sulfone phthalein (TSP) dye from wastewater using NiONPs synthesized from Ficus Nitida plant. The NiONPs were identified through various analyses, and the adsorption equilibrium was illustrated using Langmuir and Freundlich isotherm models. The results indicated that the adsorption of TSP onto NiONPs is governed by a pseudo-second-order mechanism.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Materials Science, Multidisciplinary
Xie Han, Dongdong Sun, Shi Tang, Yong Wu, Luyao Wang, Xiongzhi Zhang, Simin Liu
Summary: Developing a simple strategy to precisely modulate the mechanochromic luminescence behavior of fluorophores is crucial for understanding their structure-property relationship and promoting potential applications. The researchers reported a molecule that exhibits unexpected fluorescence characteristics when absorbed by a specific solid, with the luminescence response attributed to changes in molecular packing and conformation induced by host-guest interactions. This simple strategy offers a promising approach for constructing new mechanochromic luminescence systems.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Analytical
Natalia Chernousova, Guzel Ziyatdinova
Summary: Isopropylmethylphenols, including thymol and carvacrol, are natural compounds with diverse bioactivity that are used in the cosmetic, pharmaceutical, and food industry. A glassy carbon electrode modified with multi-walled carbon nanotubes and electropolymerized thymolphthalein has been developed for sensitive quantification of isopropylmethylphenols. The electrode shows high selectivity and has been successfully applied in the analysis of oregano and thyme spices.
Article
Chemistry, Multidisciplinary
Parul Verma, Ashish Singh, Tapas Kumar Maji
Summary: The study describes a photochromic low molecular weight gel based on DTE, self-assembled with lanthanide ions to form a photochromic coordination polymer gel. The gel exhibits different colors under UV and visible light irradiation, along with distinct optical properties, and can be used for invisible security ink and photo-modulated multi-spectrum chromism.
Article
Optics
Jianye Wei
Summary: Understanding and manipulating the excitation transport is important for studying mesoscopic quantum devices. In this research, the exciton transport in a one-dimensional two-level systems chain is studied, and the influence of cavity on the transport is investigated. The results show that the exciton transport can be significantly enhanced by the strong coupling between edge states and the cavity, and the loss of parity induced by the cavity affects the transport.
Article
Chemistry, Applied
Qingying Yang, Jiawei Zhang, Limin Wang
Summary: In this study, a DPP compound 1 with reversible mechano- and thermochromic properties was prepared, showing a drastic switch in fluorescence quantum yield between 61% and 3%. Further investigation revealed that compound 1 exists in two polymorphic forms, and the chromism is triggered by molecular packing alternation upon mechano- or thermo-stimulus. This is a rare example of chromic phenomenon caused by different packing of two enantiomers rather than their conformational difference.
Article
Chemistry, Multidisciplinary
Yuan Wang, Yingying Yang, Chuanxin Wei, Peng Yu, Xiaojie Cheng, Jiewei Li, Jianfeng Zhao, Jinyi Lin, Linghai Xie
Summary: This study achieved bending-induced fluorescence shifts and outstanding elasticity in straight-shaped and naturally curved crystals. The development of flexible crystalline materials with bending-induced fluorescence shift remains challenging. Previous flexible crystals with bending-induced fluorescence shift were mainly realized through chemical structures with a planar conformation or a special donor-π-acceptor configuration. In this study, bending-induced fluorescence shift was simultaneously achieved in straight-shaped and naturally curved crystals prepared from a halogenated diaminoterephthalate derivative with a nonplanar conformation. The findings could facilitate the design of bending-induced fluorescence shift materials for mechanically stimulated light sensors.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Biochemistry & Molecular Biology
Naoki Tsutsumi, Akitaka Ito, Azumi Ishigamori, Masato Ikeda, Masayuki Izumi, Rika Ochi
Summary: In this study, a novel bola-amphiphilic glycosylated lipopeptide-type supramolecular hydrogelator is presented, exhibiting reversible thermochromism and gel-sol transition. The investigation focused on the effects of different numbers of F residues on gelation ability and morphology of self-assembled nanostructures.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Review
Chemistry, Multidisciplinary
Miharu Eguchi, Asep Sugih Nugraha, Alan E. Rowan, Joe Shapter, Yusuke Yamauchi
Summary: This article explores adsorchromism, which refers to color changes induced by alterations in the electronic states of dye molecules due to surface adsorption. Understanding the relationship between molecular electronic states and surface adsorption can lead to the realization of desired functions through simple adsorption processes, potentially enabling applications such as efficient solar energy harvesting systems and biological/chemical sensors for visualizing environmental changes.
Article
Chemistry, Multidisciplinary
Keqiao Li, Chongjia Lin, Gongze Liu, Guang Wang, Wei Ma, Meng Li, Yang Li, Baoling Huang
Summary: This paper reports on an emissivity modulation phenomenon achieved through the intercalation/discharging of water molecules, which enables stepless and reversible modulation of infrared emissivity without the need for external energy input. By intercalating cellulose nanofibers into the MXene interlayers, the emissivity modulation process becomes highly repeatable. Lastly, a sweat-responsive adaptive textile is demonstrated, showcasing the potential of this mechanism in improving thermal comfort for the human body.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Analytical
Hyunho Seok, Sihoon Son, Jinill Cho, Sanghwan Choi, Kihong Park, Changmin Kim, Nari Jeon, Taesung Kim, Hyeong-U Kim
Summary: This review highlights the bifunctionality of chromism-integrated sensors and devices, which offer reversibility, fast response, and visual indication. It categorizes recent advances in this field and evaluates the performance of integrated chromic devices. The review provides insights for researchers and summarizes existing challenges and prospects for further research.
Article
Materials Science, Multidisciplinary
Rajesh Bisht, Vartika Dhyani, Raz Jelinek
Summary: Polydiacetylenes, specifically aminoanthraquinone-substituted ones, exhibit aggregation-dependent chromatic properties influenced by the alignment of headgroups and sidechains; film organization and optical properties are determined by solvent polarity and intermolecular interactions, allowing for solvochromic, thermochromic, and mechanochromic effects.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Multidisciplinary Sciences
Sang-hun Lee, Taek Joon Kim, Eunji Lee, Dayeong Kwon, Jeongyong Kim, Jinsoo Joo
Summary: The dipole characteristics of Frenkel excitons and charge-transfer excitons between donor and acceptor molecules in organic heterostructures are important in organic photonics and optoelectronics. The authors observed angular chromism of exciplexes in their study, indicating possible delocalization.
NATURE COMMUNICATIONS
(2023)
Review
Environmental Sciences
Ruby Baby, Peter Daniel Nixon, Nallapaneni Manoj Kumar, M. S. P. Subathra, Nallamuthu Ananthi
Summary: Dye-sensitized solar cells using natural dyes offer advantages in performance, environmentally-friendly production, and versatile integration, but still lack efficiency compared to silicon cells. Research focuses on optimizing conditions, analyzing plant part selection, extraction methods, coating techniques, and other factors to enhance overall performance and efficiency. Future prospects include wearable device application and approaches to enhance power conversion efficiency and thermochromism ability.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Indrajit Pal, Nitesh Kumar Pathak, Santanu Majumdar, Gerald Lepcha, Amiya Dey, Suresh Kumar Yatirajula, Umakanta Tripathy, Biswajit Dey
Summary: This article describes the generation of solvent-directed self-healing supramolecular Ni-(II) metallogels and studies their structure and properties. The gel nature and self-repairing strategy of the fabricated materials are experimentally proven and the supramolecular noncovalent interactions within the gel are explored. The formation strategy and microstructural features of the metallogels are scrutinized through spectroscopy and microscopy analysis. The nonlinear optical characteristics of the metallogels are evaluated, and the figure of merit indicates their potential for use in nonlinear photonic devices.
Review
Chemistry, Multidisciplinary
Hiroki Takezawa, Makoto Fujita
Summary: When molecules are confined in an isolated cavity, they experience different circumstances from those in a bulk solution, and molecular self-assembly widens the potential of molecular confinement. By confining molecules, new properties and reactivities can be discovered from the confined substrates.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2021)
Article
Chemistry, Multidisciplinary
Jiazhuo Chen, Takashi Kikuchi, Kazuhiro Takagi, Hiromasa Kiyota, Kiyohiro Adachi, Takaaki Mitsuhashi, Makoto Fujita
Summary: This article introduces a method for analyzing the degradation products of organic pollutants, which can obtain the crystal structure of organic pollutants. The study found that halogen interactions play an important role in molecular recognition in the crystalline sponge.
Article
Chemistry, Multidisciplinary
Yoshimasa Taniguchi, Takashi Kikuchi, Sota Sato, Makoto Fujita
Summary: Most transformation products of trans-iso-alpha-acid, isolated in small quantities by HPLC, were structurally analyzed using the crystalline sponge method. Thirteen compounds, including eight previously unreported, were successfully isolated and analyzed with their absolute configuration assigned, providing an improved understanding of chemical transformations during beer aging.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Chikako Matsuda, Ryo Igarashi, Hiroshi Katagiri, Takashi Murase
Summary: This study demonstrates that tri- and tetra-fluorinated [7]helicenes are photosensitive and undergo a double fluorine atom transfer. Furthermore, the transferred product undergoes a skeletal transformation on silica gel. These findings support the generation of a highly reactive cationic electrophilic intermediate in the successive transformations involving fluorine atoms.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Hiroki Takezawa, Yuya Fujii, Takashi Murase, Makoto Fujita
Summary: This article investigates the regioselective spirocyclization of a 2-biphenylacetylene in a specific conformation within a confined cavity, and discovers the selective 5-endo-dig cyclization in contrast to the normally occurring 6-endo-dig cyclization in common organic media.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Ryosuke Tabuchi, Hiroki Takezawa, Makoto Fujita
Summary: The properties of rare-earth-metal ions in aqueous media depend on their hydration modes, which can be fixed by encapsulating them in a hydrophobic cavity. Counter anions play a crucial role in capturing the ions at a fixed position. Early lanthanoid ions were preferentially encapsulated even with the same hydration number and geometry.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Review
Chemistry, Inorganic & Nuclear
Yuya Domoto, Makoto Fujita
Summary: The coordinative self-assembly of simple building blocks towards complex nanostructures is currently a popular research area in the development of artificial nanomaterials comparable to biological systems. Traditional coordination donors have been widely used in previous studies, but the recent emergence of weak pi-coordination between metal ions and unsaturated carbon-carbon bonds offers a flexible and highly tolerant bonding approach for complex nanoarchitectures. The combination of metal-acetylene pi-coordination with conventional coordination has allowed for the formation of large polyhedral complexes with unprecedented molecular entanglement, highlighting the potential advantages of this concept.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Gavin Tay, Toshiaki Wayama, Hiroki Takezawa, Satoshi Yoshida, Sota Sato, Makoto Fujita, Hiroki Oguri
Summary: In this study, the first X-ray structural determination of a dehydrosecodine-type compound was achieved by stabilizing the fragile molecule by encapsulation into a supramolecular host. This integrated approach not only provides insights into the biosynthetic conversions but also allows stabilization and storage of the reactive and otherwise short-lived intermediate.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Georgi R. Genov, Hiroki Takezawa, Harumi Hayakawa, Makoto Fujita
Summary: The TDDA reaction is a useful method to assemble complex molecular structures from simple precursors in a single step, but it requires careful design of substrates and harsh reaction conditions. In this study, we demonstrate an efficient and site-selective TDDA transformation within a self-assembled Pd6L4 cage. The encapsulation of substrates within the large cavity of the cage allows for enhanced cyclization rates and high selectivity for unsymmetrical substrates.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Kenta Iizuka, Hiroki Takezawa, Makoto Fujita
Summary: This study found that complete confinement of a symmetric molecule within a coordination cage can desymmetrize the guest conformation, enabling site-selective activation or protection of otherwise equivalent reaction sites. Multistep, one-cage reactions also showed the transformation of an AAAA-type calix-[4]-arene into a lower symmetry ABAC-type one.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Hiroyuki Tamura, Hiroki Takezawa, Makoto Fujita, Hiroshi Ishikita
Summary: We elucidate the mechanism of base-catalyzed amide hydrolysis inside a self-assembled coordination cage using a quantum mechanics/molecular mechanics/polarizable continuum model. The cage accelerates the OH- addition reaction by lowering the activation barrier through mechanical bond twisting. However, the OH- addition to an amide with a twisted bond is not enhanced in the cage.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Yuya Domoto, Kidai Yamamoto, Shumpei Horie, Zhengsu Yu, Makoto Fujita
Summary: This study demonstrates the superb control of helical chirality of discrete polyhedra created from self-assembly of propeller-shaped ligands equipped with chiral side chains. The amplification of weak chiral inductions of each ligand unit is an efficient way to control the chirality of large discrete nanostructures with high structural complexity.
Article
Chemistry, Multidisciplinary
Haruka Sunohara, Kenta Koyamada, Hiroki Takezawa, Makoto Fujita
Summary: By constructing a self-assembled photoactive Ir(iii) cage-shaped complex with anion binding pockets, efficient catalysis of visible-light-induced E-Z isomerization of an anionic styrene derivative is achieved.
CHEMICAL COMMUNICATIONS
(2021)
