Article
Chemistry, Multidisciplinary
Yali Hou, Ruping Shi, Hongye Yuan, Mingming Zhang
Summary: This study presents a general strategy to construct highly emissive perylene diimide-based metallacycles via self-assembly. The fluorescence quantum yields of these assemblies exceed 98%, and they exhibit sensitive fluorescence responses toward picric acid. This research not only provides a rational strategy for preparing highly emissive bowtie-shaped metallacycles, but also sheds light on their usage in the detection of picric acid and associated compounds.
CHINESE CHEMICAL LETTERS
(2023)
Article
Multidisciplinary Sciences
Anuva Aishwarya, Arjun Raghavan, Sean Howard, Zhuozhen Cai, Gohil S. Thakur, Choongjae Won, Sang-Wook Cheong, Claudia Felser, Vidya Madhavan
Summary: Spin chains in solid state materials are important quantum systems with potential applications. This study used low-temperature scanning tunneling microscopy to reveal long-lifetime excitations in a specific material, providing new insights for increasing spin lifetimes and quantum applications.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Spectroscopy
Prajna Moharana, G. Santosh
Summary: The self-assembly behavior of a newly synthesized amphiphilic thioester attached with carboxylic acid functionalized perylene diimide derivative was investigated in different solvents. Hemispherical aggregates were formed in THF solution and selectively bound to Fe3+ and Ba2+ ions. The binding of two equivalents of Fe3+ ions to the hemispherical aggregates resulted in supramolecular polymerization. Ba2+ ions quenched the fluorescence intensity of the aggregates, indicating the heavy atom effect.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Review
Chemistry, Analytical
Prabhpreet Singh, Andreas Hirsch, Subodh Kumar
Summary: Perylene diimide (PDI) is the most researched member of the rylene diimide family, known for its unique properties including strong electron affinity and versatility in functionalization, making it effective for various applications, especially in the field of chemical sensors.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Navdeep Kaur, Prabhpreet Singh
Summary: We have reported a novel dibromo allyl-substituted perylene diimide (PDI 2) as a near-IR emitter with 99.53% color purity and & phi; = 0.0385. PDI 2 has been used for the daylight and fluorescence imaging of latent fingerprints up to levels 1-3 on different colored porous and non-porous surfaces. It showed near-IR emission at 683 nm, 99.53% red colour purity and a thick film morphology with holes for daylight and fluorescence imaging of fingerprints (levels 1-3).
NEW JOURNAL OF CHEMISTRY
(2023)
Review
Environmental Sciences
Wenwu Zhou, Guo Liu, Bing Yang, Qiuyi Ji, Weiming Xiang, Huan He, Zhe Xu, Chengdu Qi, Shiyin Li, Shaogui Yang, Chenmin Xu
Summary: Environmental pollution is a severe issue, with various toxic contaminants found in wastewaters and surface water. Perylene diimide (PDI) and its materials play a significant role in detection and removal of pollutants, with applications in fluorescence detection and advanced oxidation technologies. The review focuses on the practical applications of PDI-based materials as fluorescent probes and catalysts in environmental protection, highlighting their synthesis, detection capabilities, and use in advanced oxidation processes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Navdeep Kaur, Prabhpreet Singh
Summary: We reported a novel dibromo allyl-substituted perylene diimide (PDI 2) as a near-IR emitter with 99.53% color purity and φ=0.0385. PDI 2 showed a morphology of a thick film (4-5 nm) with holes of radius 20-40 nm and a depth of 4-7 nm. PDI 2 has been used for the daylight and fluorescence imaging of latent fingerprints up to levels 1-3 on different colored porous and non-porous surfaces.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Erisa Ferasat, Marzieh Golshan, Mehdi Salami-Kalajahi, Hossein Roghani-Mamaqani
Summary: PTCDA was modified to PTCDI with ethylenediamine, followed by bonding coumarin derivatives onto PTCDI. The transparent and fluorescent properties of the synthesized dye in the near-infrared region were evaluated, showing high absorption on a white background and high reflection on a black background.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Analytical
Yijian Zhao, Weilian Zheng, Mengyu Liao, Shuai Zhou, Weiheng He, Ming Liu, Zhiyi Yao
Summary: A cationic perylene probe was synthesized for sensitive determination of tartrazine. The probe exhibited excellent sensing performance, with detection and quantification limits as low as 2.42 and 8.07 nmol L-1, respectively. The high binding affinity between the probe and tartrazine allowed for great anti-interference capacity. Additionally, the approach was successfully visualized using portable devices and applied to monitor tartrazine in various food condiments.
Article
Chemistry, Physical
Shuai Wang, Yongping Zou, Yuanyuan Zhou, Yun Hu, Jia Yang, Yating Hou, Huanren Cheng
Summary: A formaldehyde fluorescence probe PDSN was synthesized and applied in the recognition of formaldehyde in food. The probe showed a clear color change and excellent fluorescence performance, demonstrating high sensitivity and selectivity in formaldehyde detection.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Chemistry, Analytical
Meiyi Liu, Weilian Zheng, Yi Yang, Ge Shi, Yining Li, Shuai Zhou, Yijian Zhao, Zhiyi Yao
Summary: This study presents a new strategy for real-time and on-site monitoring of TNP in the environment by integrating the PDI-BTMA probe with a smartphone. The sensing platform shows simplicity, rapidness, and portability, and successfully quantifies TNP through the supramolecular assembly of a perylene probe. The sensor exhibits dual output signals of color and fluorescence in response to TNP, with a wide linear range and a low detection limit.
MICROCHEMICAL JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Asia R. Y. Almuhana, Philipp Langer, Sarah L. Griffin, Rhys W. Lodge, Graham A. Rance, Neil R. Champness
Summary: The synthesis of nanodiamond-perylene diimide composites involves reacting hydroxyl-functionalised perylene diimides with carboxylic acid functionalised nanodiamonds through ester formation. The nanocomposite materials retain the core of nanodiamonds and interesting dye properties of perylene diimides, as confirmed by various techniques including fluorescence measurements. This approach provides a simple mechanism for maintaining the solution-phase properties of perylene diimides in solid-state materials.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Jie Liu, Si-Yu Gao, Xin-Yi Zhang, Yakai Feng, Han-Chun Wu, Zhijian Chen, Maxim Bermeshev, Xiang-Kui Ren
Summary: In this study, a POSS-containing polynorbornene was synthesized and its supramolecular structure and photoluminescence properties were investigated. The experimental results demonstrated that the introduction of POSS cages led to a unique structure and enhanced photoluminescence properties. These findings are of great significance for understanding the structure-property relationship of optical polymers and designing polymer materials with controllable supramolecular structure and tunable luminescence properties.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Xin-Yi Zhang, Kai-Li Tian, Jie Liu, Wittaya Ngeontae, Ai-Juan Zhao, Maxim V. Bermeshev, Shi-Qing Wong, Kaspars Traskovskis, Zhijian Chen, Xiang-Kui Ren
Summary: A novel polyurethane polymer, PU-PDI, containing perylene diimide (PDI) unit and aniline segment, was synthesized and investigated for its tensile property and photophysical characteristic. The results showed that PU-PDI exhibited good tensile performance with an elongation of over 1000%. Additionally, the aniline segments in polyurethane effectively quenched the auto-fluorescence of the PDI unit, providing a feasible design strategy for optical filters with high display quality.
CHINESE JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Analytical
Yunyun Wang, Yanmo Li, Wei Zhang, Peng Yin, Lei Shang, Rongna Ma, Liping Jia, Qingwang Xue, Shuijian He, Huaisheng Wang
Summary: A novel perylene diimide molecule was designed to self-assemble into a nanostructure, reducing aggregation and enhancing luminescence. The immunosensor fabricated using this luminescent material showed a wider linear response range and lower detection limit, demonstrating good feasibility in human serum samples.
Article
Nanoscience & Nanotechnology
Tomohiro Fukuhara, Koshi Yamazaki, Takuto Hidani, Masahiko Saito, Yasunari Tamai, Itaru Osaka, Hideo Ohkita
Summary: This study investigates the origin of differences in open-circuit voltage (V-OC) for polymer:fullerene solar cells utilizing highly crystalline conjugated polymers (PTzBT) with the same thiophene-thiazolothiazole backbone but different side chains. The findings suggest that the difference in V-OC is attributed to the distinct cascaded energy structures for the highest occupied molecular orbital (HOMO) levels in the interfacial mixed phase. Additionally, it is revealed that the stabilization of HOMO is influenced by the branching of side chains, as supported by density functional theory calculations.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Shin-ichiro Natsuda, Yuji Sakamoto, Taiki Takeyama, Rei Shirouchi, Toshiharu Saito, Yasunari Tamai, Hideo Ohkita
Summary: Understanding the excited-state dynamics of non-fullerene electron acceptors is crucial for improving organic solar cells, as shown in the study of a novel non-fullerene acceptor Y6. The study found that Y6 exhibited biphasic singlet exciton decay kinetics at low excitation fluences, and singlet excitons were more likely to decay via singlet-singlet exciton annihilation at high excitation fluences, leading to ultrafast triplet formation through singlet fission.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Inorganic & Nuclear
Masashi Nakamura, Masayuki Gon, Shin-Ichiro Natsuda, Yasunari Tamai, Hideo Ohkita, Kazuo Tanaka, Yoshiki Chujo
Summary: The development of novel near-infrared (NIR) emitters is crucial for meeting the growing demands of advanced optical telecommunication and medical technology. The research team synthesized elemental skeletons with robust pi-conjugated systems including two boron-fused azo groups to improve emission properties, and the molecular design using multiple boron-fused azo groups is expected to be a critical strategy for creating novel NIR emitters.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Shin-ichiro Natsuda, Toshiharu Saito, Rei Shirouchi, Yuji Sakamoto, Taiki Takeyama, Yasunari Tamai, Hideo Ohkita
Summary: Recent studies have shown that efficient free carrier generation with a small voltage loss can be achieved in organic solar cells. However, the photophysical mechanisms underlying this phenomenon are still unclear. In this study, the mechanisms underlying free carrier generation in a PM6/Y6 blend system were investigated using transient absorption spectroscopy. The results provide direct experimental evidence for the mechanism of free carrier generation in this blend system, which is driven by downhill energy relaxation through energy cascades.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Physical
Tomokazu Umeyama, Tatsuho Wada, Kensho Igarashi, Kosaku Kato, Akira Yamakata, Taiki Takeyama, Yuji Sakamoto, Yasunari Tamai, Hideo Ohkita, Keiichi Ishida, Tomoyuki Koganezawa, Shunsuke Ohtani, Kazuo Tanaka, Hiroshi Imahori
Summary: Terminal-group halogenation can effectively impact the energy levels, light-harvesting ability, and intermolecular stacking of nonfullerene acceptors in organic photovoltaic devices. The study on three A-D-A-type NFAs, NTTIC-F, NTTIC-Cl, and NTTIC, revealed significant differences in film structure, photophysical properties, and photovoltaic performance, particularly with NTTIC-Cl showing enhanced absorption and energy levels. The observation of different molecular orientations of NFAs based on the type of halogenation atom at the terminal A unit is novel, highlighting the importance of halogenation in designing NFAs.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Yasuhiro Murata, Yasunari Tamai
Summary: Understanding the exciton diffusion properties in organic semiconductor films is crucial for the development of organic solar cells. This study investigates the unique two-dimensional diffusion characteristics of excitons in the thin films of a novel polymer, PNOz4T. By using a simulated annealing metaheuristic, the researchers found that intrachain exciton motion can be faster than interchain hopping.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Polymer Science
Shin-ichiro Natsuda, Toshiharu Saito, Rei Shirouchi, Kenta Imakita, Yasunari Tamai
Summary: Suppressing nonradiative deactivation of charge transfer states is crucial for improving the power conversion efficiency of polymer solar cells. The energy gap law does not apply to nonfullerene-acceptor-based PSCs, and parameters other than the energy gap significantly contribute to nonradiative decay dynamics. Increasing crystallinity mitigates the nonradiative deactivation of charge transfer states.
Article
Materials Science, Multidisciplinary
Yuji Sakamoto, Yasunari Tamai
Summary: This study examines the impact of polymer molecular weight on the efficiency of solid-state photon upconversion (UC) devices. Researchers found that high-molecular-weight polymers have a longer triplet lifetime, resulting in a lower threshold intensity compared to previously reported devices. The external quantum efficiency of their UC device also reached 0.35%. As a result, fluorescent conjugated polymers with long triplet lifetimes are attractive candidates for efficient solid-state UC devices.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Toshiharu Saito, Shin-ichiro Natsuda, Rei Shirouchi, Kenta Imakita, Kazuki Kohzuki, Yasunari Tamai
Summary: The large voltage loss is a significant disadvantage of organic solar cells (OSCs) compared with inorganic and perovskite solar cells and should be reduced to further improve the power conversion efficiency of OSCs. In this study, the voltage loss in OSCs with controlled energy difference between excited and charge transfer states is discussed. The advantages of narrow-bandgap fused-ring nonfullerene acceptors (NFAs) paired with wide-bandgap donors in terms of higher photoluminescence quantum yield and efficient charge separation with smaller voltage loss are highlighted.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Energy & Fuels
Kazuki Kohzuki, Rei Shirouchi, Shin-ichiro Natsuda, Toshiharu Saito, Yuji Sakamoto, Yasunari Tamai
Summary: Suppressing charge recombination is crucial for enhancing the power conversion efficiency of organic solar cells (OSCs). The formation of both singlet and triplet charge transfer (CT) states in OSCs indicates that charge recombination via the triplet excited state is the main pathway for deactivation. However, it has been shown that charge separation from triplet excitons can occur in nonfullerene acceptor (NFA)-based OSCs, emphasizing the significance of minimizing the energy difference between singlet and triplet excited states of NFAs to suppress charge recombination.
Article
Chemistry, Physical
Yasunari Tamai, Rei Shirouchi, Toshiharu Saito, Kazuki Kohzuki, Shin-ichiro Natsuda
Summary: The trade-off between short-circuit current density (J(SC)) and open-circuit voltage (V-OC) is a challenge in improving the power conversion efficiencies (PCEs) of organic solar cells (OSCs). This study provides insights into the limit of minimizing the energy offset and its impact on device performance, highlighting the importance of overcoming the trade-off between fill factor (FF) and V-OC to improve PCE.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Green & Sustainable Science & Technology
Yasunari Tamai
Summary: The power conversion efficiency of organic solar cells has greatly improved in recent years. However, there are still challenges in improving short-circuit current density, open-circuit voltage, and suppressing reflection and bimolecular charge recombination.
ADVANCED ENERGY AND SUSTAINABILITY RESEARCH
(2023)
Review
Chemistry, Multidisciplinary
Yasunari Tamai
Summary: The power conversion efficiencies of organic solar cells (OSCs) have rapidly improved, exceeding 19%. This review focuses on fundamental and cutting-edge research that explains the efficient generation of photocurrent in OSCs and discusses future research directions for further improvements in performance.
Article
Materials Science, Multidisciplinary
Yuji Sakamoto, Seiichiro Izawa, Hideo Ohkita, Masahiro Hiramoto, Yasunari Tamai
Summary: This article investigates the mechanism of a near-infrared to visible photon upconversion device, revealing the utilization of 67% of incident photons through spectroscopy. Efficient upconversion in the solid state is crucial for commercial applications in various fields.
COMMUNICATIONS MATERIALS
(2022)
Article
Chemistry, Physical
Tomokazu Umeyama, Kensho Igarashi, Yasunari Tamai, Tatsuho Wada, Taiki Takeyama, Daiki Sasada, Keiichi Ishida, Tomoyuki Koganezawa, Shunsuke Ohtani, Kazuo Tanaka, Hideo Ohkita, Hiroshi Imahori
Summary: The comprehensive study on the relationship between the structure and the photophysical and photovoltaic properties of acceptor-donor-acceptor (A-D-A) type nonfullerene acceptors (NFAs) is crucial for design guidelines in high-performance organic photovoltaics (OPVs). The inclusion of naphthalene-cored D units in A-D-A type NFAs shows potential for achieving a long singlet exciton lifetime and resulting in high power conversion efficiency in NFA-based OPVs.
SUSTAINABLE ENERGY & FUELS
(2021)
