Article
Chemistry, Multidisciplinary
Edward J. McClain, Alan K. Wortman, Corey R. J. Stephenson
Summary: Recent advances in synthetic chemistry have led to a resurgence in the development of methods for visible light-mediated radical generation. In this study, a photoactive ester based on a quinoline N-oxide core structure is reported, which acts as a strong oxidant in its excited state. The heteroaromatic N-oxide allows access to primary, secondary, and tertiary radical intermediates, and its application in the development of a photochemical Minisci alkylation is described.
Article
Materials Science, Multidisciplinary
Jiashun Duan, Kai Feng, Ling Xu
Summary: This study investigates the spin orbit coupling (SOC) effect in electron-hole pairs of non-fullerene based organic solar cells using magneto-photocurrent (MPC) and light-induced electron paramagnetic resonance (LEPR). The results demonstrate stronger SOC in non-fullerene bulk heterojunctions, which can enhance the photovoltaic performance of the solar cells.
ORGANIC ELECTRONICS
(2022)
Article
Chemistry, Physical
Mikhail N. Uvarov, Leonid V. Kulik, Sergei A. Dzuba
Summary: In this study, the nanoscale arrangement of Gx molecules in a composite material was investigated using ESE technique. The results showed that Gx molecules formed clusters and exhibited a quasi-regular nanostructure. This study provides important insights into the molecular mechanism of Gx-induced enhancement of photocurrent.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Mikhail N. Uvarov, Leonid V. Kulik, Sergei A. Dzuba
Summary: In this study, the nanoscale arrangement of Gx molecules in a composite of PCDTBT polymer and modified C60 fullerene, PCBM, was investigated using a two-pulse electron spin echo technique. Results showed that Gx molecules formed clusters and created a quasi-regular nanostructure in the matrix. The concentration at which these clusters appeared correlated with the Gx-induced enhancement of photocurrent.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Bin Mu, Jian Chen, Keyang Chen, Chunxiu Zhang, Dongzhong Chen
Summary: This study successfully designed liquid-crystalline dendrimers with donor triphenylene as the peripheral discotic mesogen and acceptor fullerene as the dendrimer core, achieving heterojunction ambipolar charge-transport columnar materials. The resulting donor-acceptor segregated columnar materials exhibit ambipolar charge-transport behavior with high mobilities for both holes and electrons.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Polymer Science
Hui Zou, Qian-Wei Li, Qi-Liang Wu, Wen-Quan Liang, Xiao-Hua Hou, Li Zhou, Na Liu, Zong-Quan Wu
Summary: Starlike hybrid helical PPIs with well-defined structures were designed and prepared using POSS as the core; chiral and amphiphilic hybrids were obtained by modifying the monomers and conducting polymerization with POSS-Pd(ii) as the initiator, exhibiting thermoresponsive behaviors and excellent enantioselective crystallization abilities.
Article
Materials Science, Multidisciplinary
Chao Qian, Dong Chen, Haiying Zhao
Summary: An axially coordinated oligomer of ferrocene-based Sn(IV) porphyrin with C-60 was synthesized and characterized, showing no electronic interaction in the ground state among the photoactive components. However, efficient photoinduced electron transfer occurred under specific conditions, resulting in the formation of a stable charge-separated state. In addition, a prompt and stable photocurrent was generated in photovoltaic devices under irradiation with monochromatic light.
Article
Polymer Science
Francesco Milano, Maria Rachele Guascito, Paola Semeraro, Shadi Sawalha, Tatiana Da Ros, Alessandra Operamolla, Livia Giotta, Maurizio Prato, Ludovico Valli
Summary: Cellulose nanomaterials show attractive properties for emerging applications, with sulfated cellulose nanocrystals being able to guide the supramolecular organization of amphiphilic fullerene derivatives at the air/water interface. The electrostatic interaction between cationic fullleropyrrolidines and anionic CNCs leads to the assembly of robust hybrid films, despite the inhibition by additional negatively charged species. These hybrid films, when transferred onto solid substrates, enhance electrical capacitance and produce higher anodic photocurrents compared to films with only fullerene derivatives.
Article
Chemistry, Multidisciplinary
Chengbo Tian, Chao Sun, Jingfu Chen, Peiquan Song, Enlong Hou, Peng Xu, Yuming Liang, Panpan Yang, Jiefeng Luo, Liqiang Xie, Zhanhua Wei
Summary: The functional group of fullerene derivatives plays a crucial role in the efficiency and stability of perovskite solar cells, and flexible alkyl chains can improve the efficiency and stability.
Article
Chemistry, Physical
Z. Wu, S. Lee, S. Y. Jeong, M. H. Jee, H. G. Lee, C. Lim, C. Wang, B. J. Kim, H. Y. Woo
Summary: The synthesis of two fullerene-non-fullerene hybrid acceptors shows potential for improving the efficiency of organic solar cells, leading to higher power conversion efficiencies by enhancing the short-circuit current density and fill factor.
MATERIALS TODAY ENERGY
(2021)
Article
Chemistry, Physical
Wenyan Wang, Cheng Zhang, Kaifang Qiu, Guohui Li, Aiping Zhai, Yuying Hao, Xiaofeng Li, Yanxia Cui
Summary: Hot-electron photodetectors (HEPDs) have attracted significant interest in image sensor and optics communication applications due to their ability to achieve photoelectric responses with photon energy below the semiconductor bandwidth. However, traditional HEPD systems with metal layers dressed with regular gratings can only excite plasmonic resonance within a narrow bandwidth, limiting the hot-electron photoelectric effect. To overcome this limitation, this study proposes the use of hybrid plasmonic nanostructures in TiO2-based HEPD devices. By incorporating Au nanoparticles and a conformal transparent Au film, the plasmonic resonances excited in this hybrid nanostructure significantly broaden the spectrum of photocurrent response from the UV band to the visible and near-infrared (NIR) ranges. Experimental results show that at wavelengths of 660 nm and 850 nm, the photocurrent in the hybrid HEPD device is enhanced by 610% and 960%, respectively, compared to devices without Au nanoparticles. This work advances the development of high-performance HEPDs and offers an alternative strategy for achieving photodetection and image sensing in the NIR range.
Article
Chemistry, Multidisciplinary
Ruben Caballero, Myriam Barrejon, Jesus Cerda, Juan Arago, Sairaman Seetharaman, Pilar de la Cruz, Enrique Orti, Francis D'Souza, Fernando Langa
Summary: A new fullerene-bis-Zn-porphyrin e-bisadduct has been successfully synthesized in this study, demonstrating the potential application of these supramolecular oligomers in the field of solar energy photovoltaic devices. The structure and formation process of the complex were determined through experiments and theoretical calculations, highlighting its significance for light energy harvesting applications.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Zhe Zhang, Dawei Li, Huarui Zhang, Xueqin Ma, Ya-Nan Chen, Andong Zhang, Xiaoyun Xu, Yahui Liu, Zaifei Ma, Zhishan Bo
Summary: By breaking the symmetry and extending the pi-bridge, three asymmetric and symmetric non-fullerene acceptors have been designed and synthesized, with the asymmetric acceptor L2 showing improved solubility, larger molar absorption coefficient, suitable phase morphology, and higher electron mobilities, leading to enhanced power-conversion efficiency in organic solar cells.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
I Pisagatti, D. Crisafulli, A. Pappalardo, G. Trusso Sfrazzetto, A. Notti, F. Nastasi, M. F. Parisi, N. Micali, G. Gattuso, V. Villari
Summary: A pillar[5]arene was synthesized and found to form a host-guest complex with a viologen derivative, resulting in the quenching of fluorescence intensity through a photoinduced electron transfer process.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Physical
Ken-ichi Sakai, Naoya Miyamoto, Mayu Ogawa, Keiichi Kawano, Tomoyuki Akutagawa
Summary: This study demonstrates the photoinduced conversion of 2,4-bImP into a pi-conjugated zwitterion through an excited-state intramolecular proton transfer reaction. The reversible color changes observed in the compound's solutions were attributed to the occurrence of ESIPT, leading to the formation of a charge-separated structure. This hypothesis was strongly supported by H-1 NMR and Raman measurements.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Naoki Kawamoto, Yongxing Hu, Yutaka Kuwahara, Hirotaka Ihara, Makoto Takafuji
Summary: Chiral glutamide-derived lipids were used to form self-assembled fibrous molecular gels for HPLC organic phases, with improved separation efficiency and high selectivity observed towards polycyclic aromatic hydrocarbons and phenol derivatives. The interactions between the elutes and the highly ordered functional groups on the molecular gel likely contribute to the enhanced separation abilities.
Article
Chemistry, Analytical
Abul K. Mallik, Hiroki Noguchi, Mohammed Mizanur Rahman, Makoto Takafuji, Hirotaka Ihara
Summary: This study aimed to enhance molecular-shape selectivity and grafted polymer characteristics by altering particle size, pore size, and polymer chains of polymer-silica hybrid materials. The hybrid materials were prepared with silica of different particle sizes using surface-initiated copolymerizations, characterized by various techniques, and evaluated for chromatographic performance.
SEPARATION SCIENCE PLUS
(2021)
Article
Materials Science, Multidisciplinary
Yoshihito Kawamura, Kazuki Ougi, Shin-ichi Inoue, Takanori Kiguchi, Makoto Takafuji, Hirotaka Ihara, Donald S. Shih
Summary: High thermal conductivity, high strength, and non-flammability have been achieved concurrently for the first time in Mg-4.5Al-2.5Ca, Mg-5Al-3Ca, Mg-6Al-4Ca, and Mg-4Al-2Ca-0.03Be (at%) alloys, produced by hot extrusion of heat-treated cast alloys.
MATERIALS TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Yutaka Kuwahara, Mio Ito, Tatsumi Iwamoto, Makoto Takafuji, Hirotaka Ihara, Naoya Ryu, Tomoyasu Mani
Summary: A chiral supramolecular assembly with redox-induced changes in its chiroptical properties was synthesized using viologen-modified glutamide. The assembly showed an orange-colored solution with a visible absorption band at around 470 nm and electronic circular dichroism signals. Chemical reduction resulted in a color change to blueish violet and a sign change of the CD signal. Oxidation could restore the chiroptical behavior of the assembly.
Article
Chemistry, Multidisciplinary
Ayumi Toyofuji, Nanami Hano, Yuya Yamaguchi, Takeshi Wakiya, Hirotaka Ihara, Makoto Takafuji
Summary: In this study, hybrid polymer microspheres with uniformly dispersed nanosilica were synthesized by an in-situ sol-gel reaction. It was found that silica nanoparticles smaller than 100 nm were formed inside the polymer matrix, resulting in a hydrophilic microsphere interior. Furthermore, chemical modification of the nanosilica inside the hybrid microspheres could control the functions inside the particles.
Article
Chemistry, Physical
Nanami Hano, Naoya Ryu, Shoji Nagaoka, Hirotaka Ihara, Makoto Takafuji
Summary: By immobilizing a single layer of inorganic nanoparticles on the surface of polymer microspheres, it is possible to absorb UV light and selectively reflect visible light, enhancing the reflectance of visible light.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Shoji Nagaoka, Kyohei Yoshida, Yu Hirota, Yuji Komachi, Makoto Takafuji, Hirotaka Ihara
Summary: A novel surface protection method for anodic aluminum oxide (AAO) was developed using environmentally friendly pure organic materials in a one-pot, one-step reaction. Totally organic aromatic polymer spherical nanoparticles (SNPs) immobilized on the AAO surface provided high water repellency and anticorrosivity, as well as increased voltage withstand capability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Analytical
Pian Jin, Fucheng Zhu, Mi Jiang, Makoto Takafuji, Hirotaka Ihara, Lei Nie, Houmei Liu
Summary: This paper proposes a novel carbonized pi-conjugated polymer-coated porous silica adsorbent for efficient extraction of berberine alkaloids. The adsorption of berberine by SiO2@C-pi-CP conforms to the pseudo-second-order and Langmuir models. The developed SPE method based on SiO2@C-pi-CP achieves excellent results in terms of detection limit, linearity, and relative standard deviations.
Article
Chemistry, Physical
Nishat Anzum Kanak, Md. Shahruzzaman, Md. Sazedul Islam, Makoto Takafuji, Mohammed Mizanur Rahman, Sumaya F. Kabir
Summary: This study fabricates nanocomposites using electrospinning technique from PLA and n-HAp. The nanocomposite shows a hydrogen bond between nHAp and PLA. Degradation study indicates a faster degradation rate in phosphate buffer solution compared to water. Cytotoxicity analysis demonstrates the non-toxic and biocompatible nature of the nanocomposite. The nanocomposite also exhibits sustained drug release behavior at different pHs, making it a potential antibacterial drug carrier for dental and orthopedic applications.
Article
Chemistry, Multidisciplinary
Naoya Ryu, Yusei Yamamoto, Yutaka Okazaki, Nanami Hano, Yuki Iwamoto, Tomohiro Shirosaki, Shoji Nagaoka, Reiko Oda, Hirotaka Ihara, Makoto Takafuji
Summary: In this study, we achieved the chiral J-aggregation of carbocyanine dyes by utilizing lysine-derived amphiphile assemblies as scaffolds in water. The tight packing with some flexibility of the assembly promoted the formation of J-aggregates with strong chiroptical properties. Our findings emphasize the importance of molecular structure and packing in controlling the aggregation and properties of dyes.
CHEMICAL COMMUNICATIONS
(2023)
Article
Polymer Science
Samia Afrin, Shahruzzaman, Papia Haque, Sazedul Islam, Shafiul Hossain, Taslim Ur Rashid, Tanvir Ahmed, Makoto Takafuji, Mohammed Mizanur Rahman
Summary: A Semi Interpenetrating Polymer Network hydrogel loaded with gentamicin was prepared for studying its wound healing activity. The hydrogel, synthesized by combining cellulose nanocrystal and synthetic polymers, exhibited excellent biocompatibility and antimicrobial properties. In vitro and in vivo tests confirmed its ability to promote rapid wound healing without scar formation.
Article
Materials Science, Multidisciplinary
Naoya Ryu, Tomoyuki Harada, Yutaka Okazaki, Kyohei Yoshida, Tomohiro Shirosaki, Reiko Oda, Yutaka Kuwahara, Makoto Takafuji, Hirotaka Ihara, Shoji Nagaoka
Summary: The study demonstrates a co-assembling system that exhibits circularly polarized luminescence with a high dissymmetry factor and strong emission. This could potentially lead to the development of light-sensitive molecules with practical applications.
MATERIALS ADVANCES
(2022)
Article
Polymer Science
Zahid Hasan, Sadia Afroz, Khayrunnahar Nipa, M. S. Rahaman, S. M. M. Hasnine, Tanvir Ahmed, Salma Sultana, Makoto Takafuji, M. A. Alam
Summary: Starch/acrylic acid/sodium styrene sulfonate-based hydrogels prepared by gamma radiation exhibit porous structure, high water absorption capacity, and excellent dye adsorption performance, making them suitable for wastewater treatment applications.
POLYMER-PLASTICS TECHNOLOGY AND MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Tomoyuki Harada, Hiroshi Yanagita, Naoya Ryu, Yutaka Okazaki, Yutaka Kuwahara, Makoto Takafuji, Shoji Nagaoka, Hirotaka Ihara, Reiko Oda
Summary: The lanthanide ions doped in nanometrical silica helices with a chirally arranged siloxane network without any organic mediates show induced chiroptical properties such as circular dichroism and circularly polarized luminescence.
CHEMICAL COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Farzana Yeasmin, Abul K. Mallik, Adib H. Chisty, Fataha N. Robel, Md. Shahruzzaman, Papia Haque, Mohammed Mizanur Rahman, Nanami Hano, Makoto Takafuji, Hirotaka Ihara
Summary: In this study, mesoporous micro-silica was incorporated as a filler in epoxy resin for the first time, resulting in significantly improved thermal stability and higher glass transition temperature in the composite materials. DSC and TGA analyses showed that the silica composite had a higher activation energy for thermal degradation compared to pure epoxy resin.
