Article
Chemistry, Multidisciplinary
Arun Dhaka, Ie-Rang Jeon, Olivier Jeannin, Emmanuel Aubert, Enrique Espinosa, Marc Fourmigue
Summary: Successful topochemical polymerization of bis(selenocyanatomethyl)butadyine 1 was achieved through the formation of a co-crystal with 1,2-bis(2-pyridyl)ethylene (2-bpen). The co-crystal underwent polymerization upon heating and the ChB acceptor molecules 2-bpen sublimated during the reaction. The polymer showed enhanced conductivity after iodine doping.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Polymer Science
Bubsung Kim, Mohammed Iqbal Khazi, Jong-Man Kim
Summary: The paper describes a Ni2+-ion-directed reversibly solvatochromic tubular PDA based on macrocyclic diacetylene (MCDA). A dimeric MCDA complex was formed through Ni2+-intercalated coordinative binding with carboxyl groups, which later transform into blue-phase PDA upon UV irradiation. Spectroscopic studies revealed an unusual and unprecedented chromatic switching mechanism due to localized structural disruption at the Ni2+ coordination site, attributed to coordinating water molecules causing structural distortion.
Article
Chemistry, Applied
Marion Wrackmeyer, Adam P. O'Rourke, Thomas Pugh, Michael L. Turner, Simon J. Webb
Summary: A library of closely related diacetylenes has been synthesized, with color changes analyzed using various analytical techniques. The diacetylenes with cycloalkyl substituents show greater sensitivity to changes in molecular structure and higher stability compared to those with n-alkyl substituents.
Article
Polymer Science
Kwangmin Bae, Dong Geol Lee, Mohammed Iqbal Khazi, Jong-Man Kim
Summary: Metal-mediated self-assembly allows controlled construction of supramolecular architectures with diverse functionalities. By introducing a metal-binding nucleobase cytosine to a macrocyclic diacetylene, a Hg-coordinated unidirectional columnar self-assembly was generated, forming organic nanotubes. UV-induced covalent cross-linking of the monomeric CytMCDA-Hg with blue-phase macrocyclic polydiacetylene nanotubes resulted in a sensing response towards heat and solvents, as well as high sensitivity against thiols.
Article
Nanoscience & Nanotechnology
Yu-Jin Choi, Seohee Park, Dong-Gue Kang, Seok-In Lim, Jahyeon Koo, Duy Thanh Tran, Sungjune Park, Kwang-Un Jeong
Summary: By synthesizing newly designed amphiphilic molecules containing iodine or iodine ions and optimizing the process, a broadband coatable thin film polarizer has been successfully developed. This polarizer, which is stable, thin, and capable of absorbing light in a specific direction, broadens the polarization light region.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Yang Liu, Xin-Ru Guan, Duan-Chao Wang, J. Fraser Stoddart, Qing-Hui Guo
Summary: Single-crystal-to-single-crystal (SCSC) polymerization is an effective method for environmentally friendly preparation of polymer single crystals (PSCs) with high crystallinity and molecular weights. Solubility and solution processibility are major challenges for practical applications of PSCs, but this study successfully synthesized soluble and processable PSCs with rigid polycationic backbones. The resulting polymeric crystals have excellent solubility, crystallinity and rheological properties, and can be characterized using various techniques.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Review
Biochemistry & Molecular Biology
Fang Li, Jingqin Xu, Yajie Wang, Haiyan Zheng, Kuo Li
Summary: Under pressure, unsaturated organic molecules tend to form covalent bonds to polymerize and create polymeric materials with extended carbon skeleton. The polymerization reactions typically occur in crystals, promoting the topochemical process.
Article
Chemistry, Physical
Sayan Maity, Abhijeet S. Gangan, Ashwini Anshu, Rashid Rafeek V. Valappil, Brahmananda Chakraborty, Lavanya M. Ramaniah, Varadharajan Srinivasan
Summary: The study investigated the pressure-induced polymerization of acrylamide using density functional theory and found that the hydrogen bond network in acrylamide can facilitate topochemical polymerization under low pressures. At higher pressures, the polymerization process is accelerated, especially at higher temperatures, providing an alternative route for topochemical polymerization when high temperatures are undesirable.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Jiajun Qi, Yuzhang Wu, Hai Jun Cho, Yuna Kim, Hiromichi Ohta, Nobuyuki Tamaoki
Summary: External pressure can significantly enhance the thermal conductivity of bisamide functionalized diacetylene crystals, which is correlated with the vibrational modes related to intermolecular hydrogen bonding. UV polymerization affects Raman-active vibrational modes of monomers but has negligible effect on thermal conductivity. These findings may have applications in designing polymer-based materials for thermal management technologies.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Ceramics
Li Jin, Yunyao Huang, Leiyang Zhang, Jun Qiao, Zhanbing He, Ruiyi Jing, Qingyuan Hu, Hongliang Du, Lin Zhang, Yunfei Chang, Xiaoyong Wei, Yan Yan
Summary: In this study, (001)-oriented perovskite-structured BaTiO3 single-crystal microplatelets were successfully fabricated from a BaBi4Ti4O15 precursor via topochemical transformation. Secondary recrystallization repaired structural damage and led to more regular shapes and narrower distributions of BT microplatelets, providing new insights into a simple strategy for manufacturing two-dimensional perovskite microcrystals.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Multidisciplinary
Xingyu Tang, Xiao Dong, Chunfang Zhang, Kuo Li, Haiyan Zheng, Ho-kwang Mao
Summary: Topochemical reactions are a promising method to obtain crystalline polymeric materials with distance-determined regio- or stereoselectivity. By studying the polymerization of acetylene in the crystalline state under high pressure, it is found that the minimum distance between carbon atoms is 2.3 angstroms, with an additional 0.8 angstroms thermal displacement. When the distance reaches this threshold, the intermolecular electronic interaction is enhanced and chemical bonding commences.
MATTER AND RADIATION AT EXTREMES
(2023)
Article
Chemistry, Multidisciplinary
Guijun Wang, Dan Wang, Anji Chen, Ifeanyi S. Okafor, Lalith Palitha Samankumara
Summary: Glycolipids with diacetylene functional groups are important compounds that can form photopolymerizable gels with stimuli-responsive properties. By introducing diacetylene functional groups at specific positions, a series of N-acetyl-D-glucosamine derivatives were synthesized and found to form self-assembled gels in various solvents, producing red-colored gels. The chemical structures and UV treatment affected the gelation properties of these compounds.
Article
Chemistry, Physical
Luca Polacchi, Arnaud Brosseau, Regis Guillot, Remi Metivier, Clemence Allain
Summary: The research focused on synthesizing novel energy transfer-based systems and their response to mechanical stress, highlighting the influence of self-assembling groups on the PDA chain on polymerization efficiency and energy transfer efficiency. Introducing tetrazine fluorophore proved to be an effective strategy in enhancing force detectability using polydiacetylenes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Meigui Fu, Shuai Yuan, Qi Qu, Yaofeng Yuan, Caixia Lin, Yanhou Geng
Summary: In this study, a macrocycle based on o-carborane was successfully synthesized. The crystal structure analysis revealed its unique porous supramolecular structure with micropore characteristics. The compound was found to undergo polymerization inside the solid when heated. This work provides a new method for synthesizing carborane supramolecular polymers.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Arthi Ravi, Syed Zahid Hassan, Subhrajyoti Bhandary, Kana M. Sureshan
Summary: In this study, a rigid inositol-derived monomer functionalized with azide and alkyne was used for regiospecific and quantitative topochemical azide-alkyne cycloaddition (TAAC) polymerization in crystalline polymorphs. The study highlights the caution of overreliance on topochemical postulates for predicting reactivity at high temperatures.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Suguru Iwasaki, Haruhiko Morito, Takashi Komine, Kazuki Morita, Taizo Shibuya, Junji Nishii, Masaya Fujioka
Summary: This study develops a novel method to control the diffusion of sodium ions and proposes an effective approach for extracting sodium ions from silicon cages. The method is effective for anisotropic ion diffusion and successfully achieves homogeneous extraction of sodium ions while maintaining high crystallinity.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Takahisa Omata, Aman Sharma, Issei Suzuki, Tomohiro Ishiyama, Shinji Kohara, Koji Ohara, Madoka Ono, Yang Ren, Khurelbaatar Zagarzusem, Masaya Fujioka, Gaoyang Zhao, Junji Nishii
Summary: Anhydrous silicophosphoric acid glass exhibited high viscosity at high temperatures, displayed proton conduction, but had lower conductivity.
Article
Physics, Multidisciplinary
Hai Jun Cho, Yuzhang Wu, Jiajun Qi, Yuna Kim, Hiromichi Ohta, Osamu Matsuda
Summary: In this study, superlattices are used to simulate the phonon transmission in nanostructures. It is found that the formation of mini-gaps in phononic structures affects the transmission of phonons and its mechanism in nanostructures.
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2022)
Article
Chemistry, Multidisciplinary
Sampreeth Thayyil, Yukinori Nishigami, Md Jahirul Islam, P. K. Hashim, Ken'ya Furuta, Kazuhiro Oiwa, Jian Yu, Min Yao, Toshiyuki Nakagaki, Nobuyuki Tamaoki
Summary: In this study, we developed azobenzene-based photoswitchable ATP antagonists to control the activity of motor proteins cytoplasmic and axonemal dyneins. Our ATP antagonists showed reversible photoswitching of cytoplasmic dynein activity and regulated axonemal dynein motor activity in a force generation model.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Suguru Iwasaki, Mihiro Hoshino, Haruhiko Morito, Masaya Kumagai, Yukari Katsura, Melbert Jeem, Madoka Ono, Junji Nishii, Masaya Fujioka
Summary: A synthetic protocol was developed to obtain a single phase of polycrystalline NaAlB14 with strongly connected intergrain boundaries. Vacuum or high-pressure annealing was employed to achieve strong grain connection and improve transport properties. The most probable defect site was suggested to be the Na site based on crystal structure and DFT calculations.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Shakkeeb Thazhathethil, Tatsuya Muramatsu, Nobuyuki Tamaoki, Christoph Weder, Yoshimitsu Sagara
Summary: This study reports a cyclophane-based supramolecular mechanophore that can indicate mechanical events through changes in its photophysical properties. The mechanophore exhibits orange emission in the absence of force, but mechanical deformation results in a change in emission color and intensity that correlates with the applied stress.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Materials Science, Multidisciplinary
Masashi Tanaka, Noriyuki Kataoka, Haruya Kobayashi, Masaya Fujioka, Masaru Oda, Aishi Yamamoto, Kensei Terashima, Junji Nishii, Hiromi Tanaka, Takayoshi Yokoya
Summary: The superconducting properties of layered titanium nitride chloride were investigated, and it was found that the treatment temperature and hydrogen incorporation have significant effects on the superconductivity.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Chemistry, Multidisciplinary
Masaya Fujioka, Melbert Jeem, Kento Sato, Masashi Tanaka, Kazuki Morita, Taizo Shibuya, Kiyonori Takahashi, Suguru Iwasaki, Akira Miura, Masanori Nagao, Satoshi Demura, Hideaki Sakata, Madoka Ono, Hideo Kaiju, Junji Nishii
Summary: By introducing Ag into ZrTe3 through solid-state intercalation, a new crystal phase with a 1D octahedral structure and a quasi-amorphous (QA) phase during the structural transition are discovered. The transport properties can be flexibly modulated from superconductivity to semiconductivity depending on the Ag concentration. Density functional theory calculations reveal the attraction between Ag ions and the pair diffusion caused by their attraction. In addition, the attraction or repulsion between guest ions can predict whether to induce a QA phase or simply lattice expansion, as in the intercalation into 2D TMDs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
M. Meinero, F. Caglieris, A. Leveratto, L. Repetto, M. Fujioka, Y. Takano, U. Zeitler, I Pallecchi, M. Putti
Summary: Through temperature-dependent magnetotransport experiments, we have observed multiple features in the transport properties of the parent compound SmFeAsO of iron pnictide superconductors below the antiferromagnetic ordering temperature of Sm. These features evolve with in-plane magnetic field, suggesting the presence of rich and previously unobserved metamagnetic transitions in this compound. The findings indicate that these features originate from magnetic transitions of the Fe moments sublattice, induced by the magnetic transitions of the Sm moments sublattice. Our work demonstrates the usefulness of transport properties in investigating magnetic ordering in the parent compounds of iron pnictide superconductors, which is believed to be the origin of high-temperature superconductivity.
JOURNAL OF PHYSICS-MATERIALS
(2023)
Article
Chemistry, Physical
Masaya Fujioka, Mihiro Hoshino, Suguru Iwasaki, Haruhiko Morito, Masaya Kumagai, Yukari Katsura, Khurelbaatar Zagarzusem, Madoka Ono, Junji Nishii
Summary: A new synthesis technique called the high-pressure diffusion control (HPDC) method was developed in this study, which combines high-pressure synthesis and anisotropic diffusion control. By adjusting temperature, pressure, and voltage simultaneously, the method enables electrical processing in high-pressure and high-temperature environments. The HPDC method successfully extracted Na ions from polycrystalline NaAlB14 while maintaining its crystal structure, creating metastable materials.
CHEMISTRY OF MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
C. Boyraz, P. Aksu, A. Guler, Y. Oner, M. Fujioka
Summary: We present the electrical and magnetic properties of polycrystalline -CuCrO2 synthesized by solid-state reaction determined to be a hexagonal phase with the space group R(3) over barm. The magnetization measurements reveal negative magnetization due to local structural distortions. The resistance measurements show that the surface of CuCrO2 grains is metallic and magnetically disordered, while the grains inside behave as an ideal antiferromagnetic insulator at lower temperatures.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Yuna Kim, Clemence Allain, Regis Guillot, Pierre Audebert
Summary: This article describes a tetrazine derivative that exhibits color-tunable crystals upon external stimuli. By heating and cooling processes, Bis(4-methylphenoxy)tetrazine (1) forms crystalline phases with photoluminescence color transitions ranging from green to red. These thermoresponsive polymorphisms and colors can be reversibly recovered by solvent vapor annealing. Additionally, the unique T-shape arrangement of the tetrazine rings and the phenyl rings leads to the formation of flexible crystals.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Runze Lin, P. K. Hashim, Saugata Sahu, Ammathnadu S. Amrutha, Nusaiba Madappuram Cheruthu, Shakkeeb Thazhathethil, Kiyonori Takahashi, Takayoshi Nakamura, Takashi Kikukawa, Nobuyuki Tamaoki
Summary: A novel class of photoswitches based on a phenylazothiazole scaffold that undergoes reversible isomerization under visible-light irradiation is reported, showing different spectral characteristics and excellent stability. The elucidated design principles will aid in the development of visible-light photoswitches for photopharmacological applications.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Inorganic & Nuclear
Suguru Iwasaki, Haruhiko Morito, Mihiro Hoshino, Junji Nishii, Masaya Fujioka
Summary: Si136 is a promising semiconductor with a direct bandgap for photovoltaics, synthesized through Na extraction from Na24Si136. In this study, 93 at.% of Na extraction from a single crystal of Na24Si136 was achieved using high-pressure-annealed zeolite as an ion absorber. The residual amount of Na is the least record among Na extraction from a single-crystalline Na24Si136. High-pressure annealing is suggested to improve Na diffusion between the grains of amorphous phases of zeolite.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Mizuki Matsuzaka, Yuma Sasaki, Kyohei Hayashi, Takahiro Misawa, Takashi Komine, Tomoyuki Akutagawa, Masaya Fujioka, Junji Nishii, Hideo Kaiju
Summary: Molecular spintronic devices are becoming popular due to the long spin relaxation times of organic semiconductors. In this study, high-mobility molecules were used to fabricate magnetic nanojunctions, and a clear magnetoresistance effect was observed at room temperature.
NANOSCALE ADVANCES
(2022)