Article
Chemistry, Applied
Hongke Zhou, Qian Huang, Xingliang Liu, Defang Xu, Weidong Zhang, Shengjie Fu, Xiucun Feng, Zhan Zhang
Summary: Two donor-acceptor luminophores PTZ-DPS and BPTZ-DPS, designed with phenothiazine and diphenylsulfone units, exhibit twisted molecular conformation, unique intramolecular charge transfer behavior, and intense fluorescence. They show switchable mechanofluorochromism, high solid-state luminescence efficiencies, and large spectral red shifts. The mechanofluorochromic behavior is due to phase transition between crystalline to amorphous states.
Review
Chemistry, Multidisciplinary
Xi Chen, Xue Zhang, Xiao Xiao, Zhijia Wang, Jianzhang Zhao
Summary: Charge transfer is crucial in molecular electron donor-acceptor systems for artificial photosynthesis, photocatalysis, photovoltaics, and fundamental photochemistry. We summarized recent developments in the study of charge transfer and discussed its application in thermally activated delayed fluorescence (TADF) emitters.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Shubhankar Barman, Aritri Pal, Anurag Mukherjee, Swadesh Paul, Anuja Datta, Suhrit Ghosh
Summary: This review provides an overview of the research status and future development of organic ferroelectric materials. Among them, donor-acceptor charge transfer complexes are considered promising for ferroelectricity. The review lists different organic systems and molecular assembly forms, and discusses their performances in terms of ferroelectricity and piezoelectricity.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Pedro H. M. Andrade, Hania Ahouari, Christophe Volkringer, Thierry Loiseau, Herve Vezin, Matthieu Hureau, Alain Moissette
Summary: This study focuses on the capture and transformation of gaseous I-2 using three distinct terephthalate-based MOFs: MIL-125(Ti), MIL-125(Ti)_NH2, and CAU-1(Al)_NH2. The results show that MIL-125(Ti)_NH2 exhibits the highest capture capacity, which is attributed to its amino group affinity, smaller band gap energy, and efficient charge separation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Zimu Wei, Sushil Sharma, Abbey M. Philip, Sanchita Sengupta, Ferdinand C. Grozema
Summary: Donor-bridge-acceptor systems based on BODIPY show potential for bio-imaging and sensing applications, with their photophysical behavior depending on solvent polarity. Factors such as donor-acceptor distance and restricted rotational motion play key roles in tuning the excited state photophysics.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Applied
Shengjie Fu, Yi Tan, Shiai Zhang, Jiayi Lv, Xiucun Feng, Defang Xu, Xingliang Liu
Summary: The study synthesized two fluorescent molecules with high-contrast reversible mechanofluorochromic properties, exhibiting twisted intramolecular charge-transfer states and good solid-state emission properties. Grinding the samples resulted in emission of fluorescence of different colors.
Review
Chemistry, Multidisciplinary
Leendert van Dalsen, Rachel E. Brown, James A. Rossi-Ashton, David J. Procter
Summary: The photoactivation of electron donor-acceptor complexes is a sustainable and versatile strategy for generating radicals. However, the electronic constraints of the donor and acceptor components can limit the range of radicals that can be generated. By using sulfonium salts in electron donor-acceptor complexation, radicals can now be generated from native functionality. This approach relaxes the electronic constraints and expands the range of radicals that can be generated.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Courtney A. DelPo, Saeed-Uz-Zaman Khan, Kyu Hyung Park, Bryan Kudisch, Barry P. Rand, Gregory D. Scholes
Summary: Enhanced delocalization is beneficial for absorbing molecules in organic solar cells, and polaritons offer exceptional delocalization that can improve the efficiency of bilayer organic photovoltaics by aiding in exciton delivery to the donor-acceptor interface. The decay of polaritons in bilayer cavities shows an additional pathway through charge transfer, indicating that the charge transfer from the polariton is fast enough to outcompete decay to the ground state.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Applied
Xiaoyu Zhao, Ivan Kurganskii, Ayhan Elmali, Jianzhang Zhao, Ahmet Karatay, Gloria Mazzone, Matvey Fedin
Summary: A series of compact coumarin-anthracene donor-acceptor dyads were synthesized to investigate the relationship between molecular configuration, electronic coupling, and intersystem crossing (ISC) efficiency. The results showed that the orthogonal geometry of the dyads was beneficial to the spin-orbit charge transfer ISC (SOCT-ISC) mechanism. Singlet oxygen quantum yields were solvent polarity-dependent, and the orthogonal dyads exhibited higher yields compared to the coplanar dyad. Transient absorption spectra revealed different localized and delocalized triplet states in the dyads, with varied lifetimes. Time-resolved electron paramagnetic resonance (TREPR) spectra confirmed the involvement of the SOCT-ISC mechanism in orthogonal dyads, while both SOCT-ISC and spin-orbit ISC (SO-ISC) mechanisms contributed to the triplet state formation in the coplanar dyad. The electron spin polarization (ESP) pattern of the triplet states depended on not only the molecular geometry but also the electron donor and acceptor structure.
Article
Chemistry, Multidisciplinary
Chen Lu, Eunkyung Cho, Zhiyuan Cui, Yuhang Gao, Wenjuan Cao, Jean-Luc Bredas, Veaceslav Coropceanu, Feng Li
Summary: In contrast to closed-shell luminescent molecules, organic luminescent radicals have both spin doublet electronic states, resulting in spin-allowed radiative transitions. The efficiency and stability of donor-acceptor (D-A center dot) type luminescent radicals, which have a donor group covalently attached to an electron-withdrawing radical core, remain challenging to define. Experimental and theoretical results suggest that the luminescence efficiency and stability of the radicals are determined by the degree of conjugation and the number of imine nitrogen atoms in the substituents, with higher conjugation and lower number of imine nitrogen atoms leading to higher efficiency and stability.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Larissa Gomes Franca, Andrew Danos, Andrew Monkman
Summary: In this study, the thermally activated delayed fluorescence (TADF) properties of the spiro-bridged donor-acceptor molecule ACRSA were investigated in guest-host films. The findings reveal that ACRSA exhibits rapid charge transfer emission and the dipole moment of the host has minimal effect on the energy of charge transfer. Additionally, ACRSA demonstrates fast and homogeneous reverse intersystem crossing (rISC) rates in films, which may contribute to higher efficiencies and extended operational lifetimes in future TADF OLEDs.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Aditya Paul, Arunava Sengupta, Somnath Yadav
Summary: This paper reports a photoresponsive electron donor-acceptor (EDA) complex, which can be detected through absorption and emission spectroscopy. Irradiation of the EDA complex with visible light triggers photoinduced single electron transfer (SET) processes that are useful for the catalyst-free, regioselective acetylation of indoles. The photocatalytic reaction with excess DAIB is also used for the synthesis of isatins. DFT and TD-DFT studies are performed to model the excited states of the EDA complex and validate the photoinduced SET mechanism.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Sairam Dnyaneshwar Veer, Vivek Chandrakant Wakchaure, Kiran Asokan, Ruchi Dixit, Tanmay Goswami, Ramchandra Saha, Rajesh Gonnade, Hirendra N. Ghosh, Sukumaran Santhosh Babu
Summary: Aesthetic designs from nature inspire scientific models and enable new knowledge. The advantageous positioning of structural units in multicomponent macrocycles allows for efficient communication. However, the construction of a functionalizable macrocycle for ultrafast charge separation and stabilization has not been attempted. In this study, a new functionalizable macrocycle was synthesized and its charge separation and stabilization capabilities were observed. The design of our macrocycle, with a supportive spatial arrangement of donor and acceptor units, will inspire the development of more complex synthetic systems with exciting electron-transfer and charge-separation features.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Multidisciplinary Sciences
Xian'e Li, Qilun Zhang, Jianwei Yu, Ye Xu, Rui Zhang, Chuanfei Wang, Huotian Zhang, Simone Fabiano, Xianjie Liu, Jianhui Hou, Feng Gao, Mats Fahlman
Summary: Energy level alignment at donor-acceptor heterojunctions is crucial for charge generation and recombination in organic photovoltaic devices. This study systematically investigates the energy level alignment and its variation at different interfaces. Contrary to previous assumptions, significant vacuum level shifts are observed at the interfaces, resulting in reduced interfacial energetic offsets and increased charge transfer state energies.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Soumen Singha, Rajkumar Jana, Rituparna Mondal, Partha Pratim Ray, Partha Pratim Bag, Kajal Gupta, Nandan Pakhira, Corrado Rizzoli, Arabinda Mallick, Sanjay Kumar, Rajat Saha
Summary: This study reports a co-crystal made of TBTA and QUIN with good electronic transport properties and optoelectronic behavior. The co-crystal self-assembles through hydrogen bonding, π…π, and other interactions, exhibiting semiconductor characteristics. Visible light exposure significantly enhances the electrical conductivity and carrier concentration of the sample.
Article
Chemistry, Multidisciplinary
Zheng Zhou, Yikun Zhu, Zheng Wei, John Bergner, Christian Neiss, Susanne Doloczki, Andreas Goerling, Milan Kivala, Marina A. Petrukhina
Summary: Chemical reduction of a pi-expanded COT derivative produces a new doubly-reduced product, accompanied by reductive core rearrangement and severe twist of the central tetraphenylene core.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Sabine Frisch, Christian Neiss, Sebastian Lindenthal, Nicolas F. Zorn, Frank Rominger, Andreas Goerling, Jana Zaumseil, Milan Kivala
Summary: A novel synthesis strategy has been developed to synthesize stable and highly absorbent TPNA compounds. The experimental findings were confirmed by theoretical studies, suggesting that TPNA is a promising platform for the development of near-IR fluorophores.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Polymer Science
Kosuke Ogita, Naomasa Yomogita, Sultan Otep, Tsuyoshi Michinobu
Summary: Defect-free and linear polyarylenebutadiynylenes with improved solubility were synthesized through postfunctionalization using a Cu(I)-catalyzed click reaction. The resulting triblock copolymer exhibited higher solubilities in organic solvents while retaining the electronic properties of the original polymer unit.
Article
Chemistry, Multidisciplinary
Waner He, Qian Liu, Sultan Otep, Hidetoshi Matsumoto, Sergei Manzhos, Prashant Sonar, Aung Ko Ko Kyaw, Tsuyoshi Michinobu
Summary: A novel DPP-based conjugated polymer, PDPPy-BDD, was synthesized and showed ambipolar field-effect transistor characteristics with average hole and electron mobilities of 3.5 x 10(-3) and 3.07 x 10(-2) cm(2) V-1 s(-1), respectively. The addition of tetramethylammonium iodide (NMe4I) successfully enhanced both the hole and electron mobilities by promoting stronger interchain pi-pi stackings, weakening face-on packing orientation in the thin film state, and increasing channel conductivities in the OFETs.
CHINESE JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Shuanglong Wang, Konstantinos Bidinakis, Constantin Haese, Franziska H. H. Hasenburg, Okan Yildiz, Zhitian Ling, Sabine Frisch, Milan Kivala, Robert Graf, Paul W. M. Blom, Stefan A. L. Weber, Wojciech Pisula, Tomasz Marszalek
Summary: A simple and effective engineering strategy using pentanoic acid (PA) is demonstrated to modulate the crystallization process and improve the charge carrier transport in perovskite FETs.
Review
Nanoscience & Nanotechnology
Chia-Yang Lin, Tsuyoshi Michinobu
Summary: With the development of solar steam generation technology, conjugated photothermal materials have attracted attention due to their advantages over metallic and inorganic materials. This review discusses recent progress in solar steam generation devices based on conjugated organic materials, including their use in fibers, membranes, and porous structures. The design of nanostructures based on nanoarchitectonics is crucial for achieving high steam generation efficiency, and considerations for designing steam absorbers are also discussed.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2023)
Article
Polymer Science
Yijie Jin, Manjusha Joshi, Takuma Araki, Naofumi Kamimura, Eiji Masai, Masaya Nakamura, Tsuyoshi Michinobu
Summary: Novel biomass-based polymers based on PDC were synthesized using Cu(I)-catalyzed azide-alkyne cycloaddition and fully characterized. These PDC-based polymers exhibited high thermal stability and strong adhesive properties to various metal plates, with the highest adhesion to copper. The addition of triazole ring improved the adhesive ability and selectivity of the PDC-based polymers to copper, enhancing their versatility as adhesives.
Review
Chemistry, Multidisciplinary
Han Jia, Tsuyoshi Michinobu
Summary: Cellulose-based conductive gels, with their flexibility, biodegradability, and biocompatibility, are considered important candidates for next generation nanoarchitectonics materials. They have been widely studied for various applications including sensors, energy storage devices, energy generators, and actuators and have shown superior performance compared to gels made from petroleum-derived chemicals. This review introduces the general preparation method of cellulose-based conductive gels, presents the latest research results, and provides information for future nanoscience and research studies.
Review
Polymer Science
Tsuyoshi Michinobu
Summary: Research on semiconducting polymers is a multidisciplinary field that requires knowledge in polymer synthesis and electronics applications. Understanding the relationship between chemical structures and physical properties is important for discovering suitable application fields. The author's group initially focused on developing high-performance semiconducting polymers with high charge carrier mobilities in thin film transistors and has recently expanded to polymers that emit light in the near-infrared region.
Review
Polymer Science
Kosuke Terayama, Satoshi Habuchi, Tsuyoshi Michinobu
Summary: Fluorescence imaging in the second near-infrared region is an effective tool in clinical diagnosis and therapy assessment. Conjugated polymer nanoparticles based on donor-acceptor polymers are promising fluorescent probes with high brightness and low cytotoxicity. This review summarizes the NIR-II fluorescent polymers reported in the past few decades and provides insights into the molecular design of donor-acceptor units for developing high-brightness NIR-II nanoparticles.
JOURNAL OF POLYMER SCIENCE
(2023)
Article
Chemistry, Physical
Mingqian Wang, Chia-Yang Lin, Yoshimitsu Sagara, Tsuyoshi Michinobu
Summary: It has been found that narrow bandgap conjugated polymers containing the TBZ unit exhibit high light absorption and photothermal properties, making them effective materials for solar steam generation.
Article
Chemistry, Multidisciplinary
Han Jia, Sabina Shahi, Lok Kumar Shrestha, Katsuhiko Ariga, Tsuyoshi Michinobu
Summary: With the emergence of the energy crisis and the development of flexible electronics, there is a need to develop new energy supply devices that are flexible, have stable energy storage, and efficient energy transfer. This study introduces carbonized nanospheres into hydrogels to be used as solid electrolytes for supercapacitors, and finds that they act as physical crosslinking points and provide a pathway for ion transport, improving the capacitance and retention of the supercapacitor.
Article
Polymer Science
Han Jia, Ning Xu, Yoshiki Nagai, Marina Doi, Toshiki Sawada, Takeshi Serizawa, Shinji Ando, Satoshi Habuchi, Tsuyoshi Michinobu
Summary: Aggregation-induced emission (AIE) polymers have been extensively studied for their potential applications in developing new polymer nanoparticles or polymer dots (Pdots) with excellent fluorescence properties. We synthesized conjugated copolymers based on carbazole (Cz) and tetraphenylethene (TPE), a common AIEgen, and found that the presence of an ethynylene spacer between Cz and TPE units resulted in aggregation-caused quenching (ACQ) properties. The ethynylene spacer played a critical role in determining the fluorescent properties of the copolymers in solid states.
Article
Materials Science, Multidisciplinary
Ying-Sheng Wu, Jian-Sian Li, Chih-Yuan Chang, Waner He, Tsuyoshi Michinobu, Yan-Cheng Lin, Wen-Chang Chen, Chu-Chen Chueh
Summary: In this study, DPP-based dual-acceptor conjugated polymers with different proquinoidal heterocyclic acceptors were synthesized and their structure-property relationship was investigated. The results showed that the backbone rigidity and coplanarity of the derived polymers were influenced by the proquinoidal characteristics of the acceptor units. DPP-NS and DPP-NN exhibited better solid-state stacking and crystallinity after thermal annealing, resulting in higher mobilities. DPP-NN also showed higher conductivity and resistance to structural deconstruction in the doping state.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Shuanglong Wang, Sabine Frisch, Heng Zhang, Okan Yildiz, Mukunda Mandal, Naz Ugur, Beomjin Jeong, Charusheela Ramanan, Denis Andrienko, Hai Wang, Mischa Bonn, Paul W. M. Blom, Milan Kivala, Wojciech Pisula, Tomasz Marszalek
Summary: The crystallization and growth kinetics of a 2D Sn(ii)-based perovskite were effectively regulated by the hot-casting method, resulting in improved operation parameters and local charge carrier mobility in field-effect transistors.
MATERIALS HORIZONS
(2022)
