Article
Chemistry, Multidisciplinary
Yuezhou Liu, Hongliang Wang, Liqing Shangguan, Peiren Liu, Bingbing Shi, Xin Hong, Feihe Huang
Summary: A light-responsive water-soluble azobenzene-based macrocycle was synthesized and successfully employed in separating PHE from anthracene via a solid-liquid extraction method at ambient conditions. After five extraction cycles, the average purity for PHE reached about 91.1% and the macrocycle could be reused at least five times without significant reduction in separation performance. This work not only provides a new and clean way to separate PHE, but also advances the application of host-guest chemistry.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Mechanics
Tianyu Kang, Qingbo Yu, Zhongyuan Liu, Shengkai Tao
Summary: This paper focuses on the impact of velocity and radius distribution on jet breakup. A theoretical model is established to analyze and predict the velocity distribution along the jet. The simplified forms of breakup time, disturbance growth rate, and disturbance level considering velocity and radius distribution are presented.
Article
Energy & Fuels
Alessandro F. Rotta Loria, Jibril B. Coulibaly
Summary: Soils subjected to thermal loads experience temperature variations, which can affect their properties and behavior. Dealing with the response of soils to thermal loads, especially thermally induced deformation, presents both challenges and opportunities for scientific investigations and engineering applications.
GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Zheng-Chun Yin, Mingjie Li, Chuang Niu, Wei-Feng Wang, Wen-Rui Liu, Qian-Wen Zhang, Guan-Wu Wang
Summary: This study achieves the reductive electrosynthesis of heterocycle-fused fulleroids from fullerotetrahydropyridazines and electrophiles in the presence of a trace amount of oxygen, with concurrent ring contraction and expansion reactions. Depending on the electrophiles used, different regioselective formations of heterocycle-fused fulleroids are achieved. The reaction proceeds through multiple steps, and the structures of the synthesized fulleroids have been determined and their high regioselectivities rationalized by theoretical calculations.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Clinical Neurology
Han-Gil Jeong, Jae Seung Bang, Beom Joon Kim, Hee-Joon Bae, Moon-Ku Han
Summary: The study suggests that intracerebral hemorrhage with lower mean HU of hematoma at presentation is more likely to undergo hematoma expansion, indicating the presence of clot contraction process reinforcing hemostasis.
INTERNATIONAL JOURNAL OF STROKE
(2021)
Article
Chemistry, Multidisciplinary
Sambasivarao Kotha, Arpit Agrawal
Summary: In this study, we synthesized 16- and 19-membered macrocycles that resemble musk-like compounds such as muscone. These macrocycles were obtained from cyclododecanone and cyclopentadecanone ring systems, and they contain a methyl and keto groups within the macrocyclic ring. The ring-closing metathesis and Tebbe olefination reactions were found to be efficient and convenient for the synthesis of these macrocycles.
Review
Polymer Science
Jordan Ochs, Carlo Andrea Pagnacco, Fabienne Barroso-Bujans
Summary: Cyclic polymers, with their circular structure and lack of chain ends, exhibit unique properties and potential applications. However, the preparation of high-purity cyclic polymers in large quantities remains challenging and requires continuous development of synthetic methods and techniques.
PROGRESS IN POLYMER SCIENCE
(2022)
Article
Engineering, Civil
D. T. Mahoney, J. R. Christensen, H. E. Golden, C. R. Lane, G. R. Evenson, E. White, K. M. Fritz, E. D'Amico, C. D. Barton, T. N. Williamson, K. L. Sena, C. T. Agouridis
Summary: This study expanded the understanding of streamflow permanence in headwater systems by developing a process-based, catchment-scale hydrologic model that identified the controls of streamflow expansion and contraction in a headwater network. The model simulated that streamflow permanence was highly dynamic in first-order reaches, with the simulated stream network length ranging from nearly 98% ± 2% of the geomorphic channel extent during wet periods to nearly 50% ± 10% during dry periods. The study also revealed a discharge threshold above which the rate of streamflow expansion decreased significantly during high-flow periods.
JOURNAL OF HYDROLOGY
(2023)
Article
Thermodynamics
Umair Khan, R. Naveen Kumar, Aurang Zaib, B. C. Prasannakumara, Anuar Ishak, Ahmed M. Galal, R. J. Punith Gowda
Summary: This study focuses on the flow of ternary nanofluid over a rotating sphere, which has important implications for cooling rotating spherical products in various industries. The study investigates the effects of three different nanoparticles on the flow over a rotating sphere and identifies the phenomenon of expansion/contraction. The study provides numerical solutions and graphical representations to demonstrate the influence of various controlling parameters.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2022)
Article
Geosciences, Multidisciplinary
Martin A. Briggs, Phillip Goodling, Zachary C. Johnson, Karli M. Rogers, Nathaniel P. Hitt, Jennifer B. Fair, Craig D. Snyder
Summary: This study provides empirical support for the existing conceptual models of headwater stream disconnection by investigating the influence of local bedrock depth and sediment thickness on summer stream temperature and channel disconnection patterns.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2022)
Article
Biology
Shulin He, Thorben Sieksmeyer, Yanli Che, M. Alejandra Esparza Mora, Petr Stiblik, Ronald Banasiak, Mark C. Harrison, Jan Sobotnik, Zongqing Wang, Paul R. Johnston, Dino P. McMahon
Summary: The study of characterizing the immune gene repertoire of 18 cockroach and termite species shows that key transitions in termite sociality are correlated with immune gene family contractions. Termites appear to have a caste-specific social defence system that may operate at the expense of individual immune protection.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Chemistry, Inorganic & Nuclear
Rajeh Alotaibi, Adam Brookfield, Jonathan M. Fowler, George F. S. Whitehead, Selena J. Lockyer, Grigore A. Timco, David Collison, Juergen Schnack, Richard E. P. Winpenny
Summary: Addition of cyclam in the reaction leads to the formation of {Cr11M2} pretzels, where cyclam coordinates to the M-II ion at the center of a twelve-metal macrocycle. Magnetic studies show that exchange interactions can be transferred from previous Cr-III rings.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Chenhao Yao, Brice Kauffmann, Ivan Huc, Yann Ferrand
Summary: Two oligoamide macrocycles composed of eight and twelve monomers were synthesized by utilizing helicity disruptors. The resulting macrocyclic ribbons adopt figure-of-eight and pseudoplectoneme shapes and are capable of self-assembly.
CHEMICAL COMMUNICATIONS
(2022)
Article
International Relations
Janine Natalya Clark
Summary: This interdisciplinary article presents a novel conceptualization of resilience as a dialectical process of expansion and contraction across multiple domains and levels. Drawing on fieldwork, it critiques the notions of bouncing back and bouncing forward, emphasizing the systemic dimensions of resilience. Ultimately, it discusses the implications for the field of transitional justice.
INTERNATIONAL STUDIES REVIEW
(2021)
Review
Chemistry, Organic
Xinyuan Zhang, Li Lin, Jing Li, Shiyu Duan, Yuhang Long, Jiahong Li
Summary: Medium-sized rings and macrocycles, which are crucial components in drugs and natural products, have attracted significant attention from chemists in developing simple, green, and efficient synthesis methods. Recent advancements in ring expansion/cyclization reactions for these compounds have been reviewed to outline the future prospects and development in this field.
CHINESE JOURNAL OF ORGANIC CHEMISTRY
(2021)
Review
Chemistry, Multidisciplinary
Motoki Toganoh, Hiroyuki Furuta
Summary: Confusion is a novel concept in porphyrin chemistry, and the discovery of N-confused porphyrin in 1994 has led to a significant advancement in this field. Confused porphyrinoids are increasingly being studied and applied in various areas such as supramolecular chemistry, materials chemistry, biological chemistry, and catalysts.
Article
Chemistry, Inorganic & Nuclear
Misaki Kamioka, Yitong Wang, Shigeki Mori, Hiroyuki Furuta, Soji Shimizu
Summary: A sigma-bonded platinum(II) diketopyrrolopyrrole (Pt-DPP) complex with high fluorescence properties in both solution and solid state was synthesized. The intense emission of the Pt-DPP complex is attributed to the DPP-centered fluorescence. In the solid state, aggregation-caused quenching is mitigated by the well-segregated molecular packing due to the bulky triphenylphosphine ligands. The easy synthesis and unique fluorescence properties of the Pt-DPP complex are beneficial for the development of DPP-based functional chromophores.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Editorial Material
Chemistry, Multidisciplinary
Calvin Chau, Sajal Sen, Adam C. Sedgwick, Philip A. Gale, G. Dan Pantos, Sung Kuk Kim, Jung Su Park, Elisa Tomat, Jonathan F. Arambula, Anne E. Gorden, Hiroyuki Furuta
Summary: This article celebrates Professor Jonathan Sessler's 65th birthday by tracing his life and career path. It highlights his early days as an independent researcher and his contributions to the field of chemistry. The article aims to inspire readers to pursue their academic endeavors and emphasizes Jonathan's guiding motto.
Article
Chemistry, Multidisciplinary
Keito Shimomura, Yuma Nakamura, Hiroto Kai, Kyosuke Saito, Ko Furukawa, Shigeki Mori, Masatoshi Ishida, Hiroyuki Furuta
Summary: Novel site-selective hetero-copper/zinc complexes were synthesized and characterized, showing unique NIR absorption features and easy redox properties. The differences in structural parameters and Lewis acidity between the copper and zinc centers in different complexes highlight their potential applications as pi-materials responding to NIR light.
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
(2022)
Article
Chemistry, Multidisciplinary
Tsang-Wei Matt Chen, Yuki Tanaka, Yohei Kametani, Kum-Yi Cheng, Chih-Hsun Lin, Yi Rick Lin, Ting-Rong Hsu, Zuqian Chen, Jiping Hao, Shigeki Mori, Yoshihito Shiota, Kazunari Yoshizawa, Hiroyuki Furuta, Soji Shimizu, Chun-Hsien Chen
Summary: This study scrutinizes the spontaneous assembly of antiaromatic compounds at the liquid-solid interface using scanning tunneling microscopy (STM). The research reveals the polymorphism in monolayers characterized by orthogonal and parallel assemblies at different concentrations. The parallel assembly is found to be more stable and dominantly formed at higher concentrations. Moreover, the narrowing of the HOMO-LUMO gap suggests significant molecular orbital interactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Biochemistry & Molecular Biology
Osamu Iwanaga, Mayuko Miyanishi, Toshihiro Tachibana, Takaaki Miyazaki, Yoshihito Shiota, Kazunari Yoshizawa, Hiroyuki Furuta
Summary: In this study, density functional theory calculations were used to investigate the factors affecting acceleration and high trans/cis selectivity in the catalytic cyclopropanation reaction of styrene with ethyl diazoacetate by cobalt N-confused porphyrin complexes. The research found that the energy gap between the cobalt-carbene adduct intermediates and the NCP skeletons and axial pyridine ligands played important roles in determining the reaction rate and stereoselectivity.
Article
Chemistry, Multidisciplinary
Qizhao Li, Masatoshi Ishida, Yunyun Wang, Chengjie Li, Glib Baryshnikov, Bin Zhu, Feng Sha, Xinyan Wu, Hans agren, Hiroyuki Furuta, Yongshu Xie
Summary: In this study, we report the synthesis of a 20 pi antiaromatic sapphyrin isomer, which exhibits a reactivity for further oxidation due to its distinct antiaromatic electronic structure. The resulting compound possesses a unique spiro-carbon-containing [5.6.5.6]-tetracyclic structure and can be easily transformed to novel porphyrinoids with variable aromaticity. This research highlights the synthesis of porphyrinoid compounds with different aromatic properties.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Applied
Ru Feng, Tatsuya Mori, Takuma Yasuda, Hiroyuki Furuta, Soji Shimizu
Summary: The authors present two new pyrrolopyrrole aza-BODIPY (PPAB) based panchromatic chromophores, TT-2PPAB and DFBT-2PPAB, with an acceptor-donor-acceptor configuration. Among them, TT-2PPAB exhibits a moderate power conversion efficiency (PCE) of 3.11% when combined with [6,6]-phenyl-C71 butyric acid methyl ester (PC71BM) acceptor, with an energy loss of 0.48 eV, smaller than the empirical limit of 0.6 eV. The efficient photovoltaic performance of the TT-2PPAB-based device is attributed to the sufficiently deep LUMO level of TT-2PPAB for charge transfer to PC71BM, as revealed by electrochemistry and theoretical calculations.
Article
Chemistry, Multidisciplinary
Jiping Hao, Akihide Nishiyama, Shigeki Mori, Hiroyuki Furuta, Soji Shimizu
Summary: A ring-opening reaction of nickel 10,20-dimesityl-5,15-dioxaporphyrin (NiDOP) with aryl Grignard reagents resulted in the formation of 1,9-diaryldipyrrins instead of the expected demetallation reaction. Reactions with less-sterically hindered aryl Grignard reagents yielded the dipyrrin products, while no reaction occurred with alkyl, ethynyl, and 2-thienylmagnesium bromides as well as sterically hindered mesitylmagnesium bromide. The unique ring-opening reactivity of NiDOP and the characterization of the 1,9-diaryldipyrrin products are reported.
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
(2023)
Article
Chemistry, Multidisciplinary
Osamu Iwanaga, Naoya Yoshida, Takaaki Miyazaki, Fumito Tani, Shigeki Mori, Soji Shimizu, Masatoshi Ishida, Hiroyuki Furuta
Summary: Novel cobalt(III) complexes of N-confused porphyrin and its dimer were synthesized and their structures were elucidated. The redox properties of the complexes were examined using electrochemical approaches, spectroelectrochemistry, and DFT calculations. The results indicate the unique multi-electron reservoir capability of the metal complexes of the N-confused porphyrin dimer.
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
(2023)
Article
Chemistry, Multidisciplinary
Yuma Sato, Takahide Shimada, Shigeki Mori, Yuhsuke Yasutake, Susumu Fukatsu, Hiroyuki Furuta, Masatoshi Ishida
Summary: Researchers have synthesized a previously unknown butadiyne-linked BODIPY dimer, using the ethynyl-substituted pyrrolyl-BODIPY precursor prepared by gold-catalyzed C-H alkynylation. The dimer showed a characteristic broad absorption band in the near-infrared (NIR) region due to the pi-extended structure of the BODIPY chromophore. Upon photoexcitation, varied fluorescent responses were observed, which originated from the conformational changes in the rigid dimer. Therefore, the BODIPY dimer could be a potential NIR fluorescence material for probing distinct viscous environments in biological tissues.
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
(2023)
Article
Chemistry, Physical
Karan Ahmadzadeh, Xin Li, Zilvinas Rinkevicius, Patrick Norman
Summary: This study provides computationally tractable expressions for tensor-averaged quadratic response functions with a dependence on local spin densities and spin-density gradients. The method allows for efficient calculations when dealing with resonance enhancement.
ELECTRONIC STRUCTURE
(2022)
Article
Biochemistry & Molecular Biology
Tomoki Ueda, Kei-ichiro Nishimura, Yuka Nishiyama, Yuto Tominaga, Katsushi Miyazaki, Hiroyuki Furuta, Shigeyoshi Matsumura, Yoshiya Ikawa
Summary: Alternative splicing is an important mechanism in eukaryotic cells that allows multiple proteins to be produced from a single gene. Although it is usually associated with group I self-splicing introns, limited examples of alternative splicing have been reported. This study focuses on exon-skipping splicing in genes containing two group I introns and reveals the key structural elements important for this type of splicing through pairwise engineering and biochemical characterization.
Article
Chemistry, Multidisciplinary
Qizhao Li, Masatoshi Ishida, Chengjie Li, Glib Baryshnikov, Feng Sha, Bin Zhu, Xinyan Wu, Hans Agren, Hiroyuki Furuta, Yongshu Xie
Summary: This study reports the synthesis of novel dimeric porphyrin analogs through a one-pot oxidation reaction. These compounds exhibit tunable conformations and unique properties, making them potential candidates for organic optoelectronic materials.
Review
Chemistry, Multidisciplinary
Michal J. Bialek, Karolina Hurej, Hiroyuki Furuta, Lechoslaw Latos-Grazynski
Summary: The world of modified porphyrins was revolutionized when an N-confused porphyrin (NCP), a porphyrin isomer, was first published in 1994. By replacing one inner nitrogen with a carbon atom, the chemistry that can be performed within the coordination cavity underwent a revolutionary change. The introduction of a carbon fragment from the ring or an inner substituent close to an inserted metal ion allowed exploration of new pathways in the organometallic chemistry of porphyrins. Since the discovery of NCP, various modifications have been available to tune the coordination properties of the cavity, introducing a fascinating realm of carbaporphyrins. This review surveys all possible carbatetraphyrins(1.1.1.1) and their spectacular coordination and organometallic chemistry.
CHEMICAL SOCIETY REVIEWS
(2023)
