Article
Chemistry, Multidisciplinary
Kentaro Tanaka, Ryo Inoue, Yasuhiro Morisaki
Summary: By utilizing enantiopure building blocks, optically active cyclic dimers, trimers, and tetramers were prepared, showing clear Cotton effects and corresponding CPL signs. While the cyclic dimer did not emit CPL, the cyclic trimer and tetramer exhibited intense CPL emissions with a relatively high dissymmetry factor. Their optical and chiroptical properties were reproduced by time-dependent density functional theory calculations.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Chemistry, Organic
Dan Xu, Wen-Hua Zheng
Summary: Three pairs of planar chiral heteroarenes were synthesized from optically pure 4-amino[2.2]paracyclophane using palladium-catalyzed Buchwald-Hartwig coupling and hypervalent iodine-mediated oxidative cyclization. Among them, one enantiomer of planar chiral azahelicene was found to exhibit significantly stronger circularly polarized luminescence activity compared to the other planar chiral heteroarenes.
Article
Chemistry, Multidisciplinary
Nanami Miki, Hazuki Maeda, Ryo Inoue, Yasuhiro Morisaki
Summary: The optical and chiroptical properties of two molecules synthesized using enantiopure planar chiral building blocks were investigated experimentally and theoretically. The chiroptical properties were strongly dependent on the orientation of the stacked pi-electron systems, indicating that these properties could be regulated by changing the orientation of the pi-electron systems.
Article
Polymer Science
Hazuki Maeda, Ryo Inoue, Akinori Saeki, Yasuhiro Morisaki
Summary: The synthesis of polymers with stacked three-ring para-phenylene-ethynylene pi-electron systems through Sonogashira-Hagihara cross-coupling was successful. The optically active pseudo-meta-linked dimers and polymers emitted intense circularly polarized luminescence (CPL) with relatively high anisotropy factors.
Article
Chemistry, Multidisciplinary
Motoki Tsuchiya, Hazuki Maeda, Ryo Inoue, Yasuhiro Morisaki
Summary: In this study, optically active conjugated molecules with one-handed helical structures were prepared, showing excellent chiroptical properties such as circularly polarized luminescence. Optical resolution of planar chiral pseudo-meta-disubstituted [2.2]paracyclophane was also achieved on a sub-gram scale.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Masashi Hasegawa, Yuki Ishida, Hiroaki Sasaki, Sumire Ishioka, Katutura Usui, Nobuyuki Hara, Maho Kitahara, Yoshitane Imai, Yasuhiro Mazaki
Summary: A stereogenic pi-system based on dimer and trimer of [2.2]paracyclophane (PC) and biphenyl was prepared and its structural, photophysical, and chiroptical properties were investigated. X-ray analysis revealed specific double helical and isosceles triangle structures. The spectra in solution showed similar behavior, with high fluorescence quantum yields and moderate asymmetry.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Chen Liao, Yu Zhang, Shang-Hui Ye, Wen-Hua Zheng
Summary: The work describes the construction of a novel planar chiral [2.2]paracyclophane-based TADF-active molecule with CPL, which exhibits highly efficient luminescence performances and excellent CPL properties. The enantiomers show excellent TADF activities and the molecule has a small energy difference between singlet and triplet states. Additionally, a solution-processed yellow CP-OLEDs based on the molecule demonstrates high brightness, external quantum efficiency, and CPL signal.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Organic
Chun-Hua Chen, Wen-Hua Zheng
Summary: Planar chiral boron-nitrogen heteroarenes based on [2.2]paracyclophane were successfully synthesized as a new family of circularly polarized luminescence emitters, demonstrating strong CPL signals and high quantum yields in both solution and doped film.
Article
Chemistry, Multidisciplinary
Jing He, Mohan Yu, Maofu Pang, Yanqing Fan, Zhe Lian, Ying Wang, Wenguang Wang, Yajun Liu, Hua Jiang
Summary: Combining CPPs with [2.2]PCP leads to intriguing chiral macrocycles with aesthetic structures and size-dependent channels. These macrocycles display unique photophysical properties, with high fluorescence quantum yield of up to 82%, and the fluorescent color varies with ring size. In addition, size-dependent chiroptical properties with moderately large CPL dissymmetry factor and CPL brightness were observed.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Aoi Morisaki, Ryo Inoue, Yasuhiro Morisaki
Summary: This study reports the synthesis of optically active cyclic tetramers from two enantiomerically pure [2.2]paracyclophane compounds. The combination of the absolute configurations of the planar chiral pseudo-ortho- and pseudo-meta-[2.2]paracyclophane units determined the formation of parallel-#- or weave-#-structures. The weave-#-shaped cyclic tetramer exhibited good chiroptical properties and emitted circularly polarized luminescence with high anisotropy and brightness.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Nanami Miki, Ryo Inoue, Yasuhiro Morisaki
Summary: In this study, both enantiomers of a one-handed helical molecule with an o-arylene-ethynylene skeleton were prepared using a planar chiral [2.2]paracyclophane, and the helicity of the molecule was controlled by its planar chirality. Excellent chiroptical properties, especially intense circularly polarized luminescence with a high g(lum) value on the order of 10(-2), were observed.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2022)
Article
Chemistry, Multidisciplinary
Kensei Matsumura, Ryo Inoue, Yasuhiro Morisaki
Summary: Optically active A-shaped cyclic molecules with helical structures were synthesized by incorporating a planar chiral [2.2]paracyclophane unit. These molecules exhibited excellent optical properties and the experimental results agreed well with theoretical calculations.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Organic
Simon Felder, Marie-Leonie Delcourt, Manon H. E. Bousquet, Denis Jacquemin, Rafael Rodriguez, Ludovic Favereau, Jeanne Crassous, Laurent Micouin, Erica Benedetti
Summary: This study describes the synthesis and photophysical characterization of differently substituted planar chiral analogues of PRODAN based on a [2.2]paracyclophane scaffold. Results show that the (chir)optical properties of the new phane compounds strongly depend on their substitution patterns, with more pronounced solvatochromism and clear chiroptical behaviors observed when the substituents are placed on the two rings of the pCp core in a non-co-planar arrangement (pseudo-para derivative), which may facilitate the design of new pCp-based luminophores with finely tuned photophysical properties.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Organic
Emrah Polat, Ozge Turbedaroglu, Murat Cakici
Summary: A new class of chiral bis(benzoxazole) compounds was synthesized in this study, with enantiomeric enrichment achieved through the Horeau principle in the synthesis route. The chiralization of the achiral bis(benzoxazole) framework was achieved using a planar chiral [2.2]paracyclophane moiety.
TETRAHEDRON LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Motoki Tsuchiya, Ryo Inoue, Kentaro Tanaka, Yasuhiro Morisaki
Summary: Planar chiral [2.2]paracyclophane was used as a chiral scaffold to induce twist chirality in the anthracene moiety, resulting in chiroptical properties such as circular dichroism and circularly polarized luminescence. The experimental results were well reproduced by theoretical studies, which also revealed the origin of these properties.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Review
Polymer Science
Masayuki Gon, Kazuo Tanaka, Yoshiki Chujo
Article
Chemistry, Multidisciplinary
Yuki Inoue, Daisuke Sakamaki, Yusuke Tsutsui, Masayuki Gon, Yoshiki Chujo, Shu Seki
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2018)
Article
Chemistry, Multidisciplinary
Kenta Nishino, Kyoya Uemura, Kazuo Tanaka, Yoshiki Chujo
NEW JOURNAL OF CHEMISTRY
(2018)
Article
Polymer Science
Madoka Yamaguchi, Kazuo Tanaka, Yoshiki Chujo
Article
Polymer Science
Madoka Yamaguchi, Shunichiro Ito, Amane Hirose, Kazuo Tanaka, Yoshiki Chujo
Article
Polymer Science
Honami Yamane, Kazuo Tanaka, Yoshiki Chujo
Article
Polymer Science
Honami Yamane, Kazuo Tanaka, Yoshiki Chujo
Article
Polymer Science
Takuya Matsumoto, Shunichiro Ito, Kazuo Tanaka, Yoshiki Chujo
Article
Chemistry, Multidisciplinary
Kenta Nishino, Kazushi Hashimoto, Kazuo Tanaka, Yasuhiro Morisaki, Yoshiki Chujo
SCIENCE CHINA-CHEMISTRY
(2018)
Article
Chemistry, Multidisciplinary
Yasuchika Hasegawa, Yui Miura, Yuichi Kitagawa, Satoshi Wada, Takayuki Nakanishi, Koji Fushimi, Tomohiro Seki, Hajime Ito, Takeshi Iwasa, Tetsuya Taketsugu, Masayuki Gon, Kazuo Tanaka, Yoshiki Chujo, Shingo Hattori, Masanobu Karasawa, Kazuyuki Ishii
CHEMICAL COMMUNICATIONS
(2018)
Article
Chemistry, Medicinal
Risa Sawada, Masayuki Gon, Jun Nakamura, Yasuhiro Morisaki, Yoshiki Chujo
Review
Chemistry, Multidisciplinary
Masayuki Gon, Kazuo Tanaka, Yoshiki Chujo
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2019)
Article
Chemistry, Multidisciplinary
Hayato Narikiyo, Masayuki Gon, Kazuo Tanaka, Yoshiki Chujo
MATERIALS CHEMISTRY FRONTIERS
(2018)
Article
Chemistry, Multidisciplinary
Hiroki Mori, Kenta Nishino, Keisuke Wada, Yasuhiro Morisaki, Kazuo Tanaka, Yoshiki Chujo
MATERIALS CHEMISTRY FRONTIERS
(2018)
Article
Chemistry, Multidisciplinary
Joseph C. Furgal, Honami Yamane, Timothy R. Odykirk, Eongyu Yi, Yoshiki Chujo, Richard M. Laine
CHEMISTRY-A EUROPEAN JOURNAL
(2018)
Article
Materials Science, Multidisciplinary
Mengjiao Dong, Liyun Liao, Chensheng Li, Yingxiao Mu, Yanping Huo, Zhong-Min Su, Fushun Liang
Summary: This study investigates the influence of the polarity of polymer matrices on persistent room-temperature phosphorescence (pRTP). It is discovered that intense phosphorescence emission can be achieved in highly polar matrices such as polyacrylic acid (PAA). The dipole-dipole interaction between the polar fluorophore and polar matrix is proposed to stabilize the excited state and facilitate the generation of efficient room-temperature phosphorescence emissions.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Han-Jiang Yang, Weijia Xiang, Xiangzhou Zhang, Jin-Yun Wang, Liang-Jin Xu, Zhong-Ning Chen
Summary: This article reports a 2D copper(I)-based cluster material for X-ray imaging, which exhibits ultra-high spatial resolution, high photoluminescence efficiency, and low detection limit. The material shows excellent linear response to X-ray dose rates and light output, and has the best spatial resolution among reported lead-free metal halide hybrids.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Review
Materials Science, Multidisciplinary
Taek Joon Kim, Sang-hun Lee, Dayeong Kwon, Jinsoo Joo
Summary: Donor-acceptor heterostructures using organic-inorganic halide perovskites, two-dimensional transition metal dichalcogenides, pi-conjugated organic small/macro molecules, and quantum dots are promising platforms for exciton-based photonics and optoelectronics. Hetero-interlayer excitons and hetero-intermolecular excitons formed through optical and/or electrical charge transfer in various heterostructures are important quasi-particles for light emission, detection, and harvesting systems.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Liemao Cao, Xiaohui Deng, Zhen-kun Tang, Rui Tan, Yee Sin Ang
Summary: We investigate the interface properties between WSi2N4 and Mo2B, O-modified Mo2B, and OH-modified Mo2B nanosheets. We find that WSi2N4 and Mo2B form n-type Schottky contacts, while functionalizing Mo2B with O and OH leads to the formation of both n-type and p-type ohmic contacts with WSi2N4. Additionally, we demonstrate the emergence of quasi-ohmic contact with ultralow lateral Schottky barrier and zero vertical interfacial tunneling barriers in Mo2B(OH)2-contacted WSi2N4.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Ga Eun Kim, Hae-Jin Kim, Heesuk Jung, Minwoo Park
Summary: This study presents a solution to the commercialization challenges of flexible LEDs based on MAPbBr(3) by incorporating polyurethane and an In-Ga-Zn-Sn liquid alloy. The designed devices showed high flexibility, efficiency, and durability, with improved electron injection and reduced defects, making them promising for next-generation displays.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Tao Shen, Zeng Wu, Zhen Jiang, Dongsheng Yan, Yan Zhao, Yang Wang, Yunqi Liu
Summary: Sidechain engineering is an important molecular design strategy for tuning the solid-state packing and structural ordering of conjugated polymers. The effects of sidechain direction on the optoelectronic properties of polymers and device performance were systematically investigated in this study. The results demonstrate that tuning the sidechain substitution direction can effectively improve the molecular structure and light absorption properties of polymers, providing new insights for the rational design of functional polymers.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Lotte Clinckemalie, Bapi Pradhan, Roel Vanden Brande, Heng Zhang, Jonathan Vandenwijngaerden, Rafikul Ali Saha, Giacomo Romolini, Li Sun, Dirk Vandenbroucke, Mischa Bonn, Hai I. Wang, Elke Debroye
Summary: In this study, a facile strategy using a non-conductive polymer was proposed to fabricate stable, pinhole-free thick films. The effect of introducing a second phase into CsPbBr3 perovskite crystals on their photophysical properties and charge transport was investigated. The dual phase devices exhibited improved stability and more effective operation at higher voltages in X-ray detection.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Jingye Zou, Shenglan Hao, Pascale Gemeiner, Nicolas Guiblin, Omar Ibder, Brahim Dkhil, Charles Paillard
Summary: When rare-earth ions are embedded in a ferroelectric material, their photoluminescence can serve as an all-optical probe for temperature, electric field, and mechanical stimulus. However, the impact of ferroelectric phase transitions on photoluminescence is not well understood. In this study, we demonstrate changes in the photoluminescence of green emission bands during critical ferroelectric transitions in an Er-doped BaTiO3 material. We also find that the intensity ratio and wavelength position difference of sub-peaks provide information on the phase transitions.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Jiangchao Han, Daming Zhou, Wei Yang, Chen Lv, Xinhe Wang, Guodong Wei, Weisheng Zhao, Xiaoyang Lin, Shengbo Sang
Summary: Rare type-II spin-gapless semiconductors (SGSs) have attracted increasing attention due to their unique spin properties. In this study, the interface contacts and spin transport properties of different devices composed of VSi2P4 ferromagnetic layers were investigated. The results show that VSi2P4 is a promising material for designing vertical van der Waals heterostructures with a giant tunnel magnetoresistance (TMR) in spintronic applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Tianqi Zhao, Renagul Abdurahman, Qianting Yang, Ruxiangul Aiwaili, Xue-Bo Yin
Summary: In this study, we designed and prepared Cr and Ba-doped gamma-Ga2O3 nanoparticles to achieve near-infrared emission and enhance the emission intensity. The emission mechanism was proposed based on the trap depth, band gap, and energy levels of Cr ions. The ratiometric temperature sensing and encryption information transfer demonstrated the potential applications of this technology.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Shuvankar Gupta, Jyotirmoy Sau, Manoranjan Kumar, Chandan Mazumdar
Summary: In this study, a new spin-gapless semiconductor material CoFeMnSn is reported, and its stable structure and spin-polarized band structure are determined through experimental realization and theoretical calculations. The compound exhibits a high ferromagnetic transition temperature, making it excellent for room temperature applications. The nearly temperature-independent resistivity, conductivity, and carrier concentration of the compound, adherence to the Slater-Pauling rule, and the high intrinsic anomalous Hall conductivity achieved through hole doping further confirm its spin-gapless semiconductor nature. Additionally, the compound's SGS and topological properties make it suitable for spintronics and magneto-electronics devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Ikumi Aratani, Yoji Horii, Yoshinori Kotani, Hitoshi Osawa, Hajime Tanida, Toshiaki Ina, Takeshi Watanabe, Yohko F. Yano, Akane Mizoguchi, Daisuke Takajo, Takashi Kajiwara
Summary: In this study, two-dimensional arrays of single-molecule magnets (SMMs) based on metal-organic frameworks (MOFs) were systematically modified through Langmuir-Blodgett methods and chemical modifications. The introduction of bulky alkoxide groups induced structural changes and perpendicular magnetic anisotropy. This research provides a promising strategy for the construction of high-density magnetic memory devices using molecular spintronics.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Zonghao Lei, Houhe Dong, Lijie Sun, Bing Teng, Yanfei Zou, Degao Zhong
Summary: Researchers have successfully developed four different up-conversion phosphors based on the Eulytite-type host Ba3Yb(PO4)(3). The optical temperature sensing properties of these phosphors were thoroughly investigated, and it was found that Ba3Yb(PO4)(3):Tm/Er/Ho showed potential for optical temperature measurement applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
C. Roncero-Barrero, M. A. Carvajal, J. Ribas-Arino, I. de P. R. Moreira, M. Deumal
Summary: This study computationally investigates the conductivity of four isostructural compounds with different Se contents, and reveals the parameters that define their conductivity in stable organic radical materials. The results provide insights into the influence of Se content on the conductivity and highlight the importance of considering multiple parameters in understanding the trends in conductivity.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Remi Arras, Kedar Sharma, Lionel Calmels
Summary: In this study, we investigated the interplay between structural defects in NiFe2O4, showing that the complex formed by a Ni-Oh/Fe-Td-cation swap and a neutral oxygen vacancy is more stable than these two isolated defects, and significantly reduces the width of the minority-spin band gap.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)