Article
Chemistry, Multidisciplinary
Wei Zhang, Jie Kong, Rong Miao, Hongwei Song, Yalei Ma, Meng Zhou, Yu Fang
Summary: A molecular engineering strategy is developed to achieve fluorescent chromophores with integrated AIE and TICT properties. The TICT properties are validated through theoretical calculations and experimental techniques. The findings provide mechanistic elucidation for the design of chromophores with high tunability and strong emissions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Hitomi Saito, Yukika Sobue, Tomoaki Sugaya, Satoshi Iwatsuki, Masahiko Inamo, Koji Ishihara
Summary: Novel BF2-beta-diketonate complexes 1-4 with phenylboronic acid moieties and methoxyphenyl or dimethylaminophenyl groups were synthesized and their photophysical properties, pH response, and reactivity to D-fructose were evaluated. Complexes 1 and 2 with a methoxyphenyl group exhibited high intensity luminescence in non-polar to polar solvents, except in DMSO, while complexes 3 and 4 with a dimethylaminophenyl group showed a significant decrease in luminescence intensity with increasing solvent polarity due to twisted intramolecular charge transfer (TICT) properties. The luminescence intensity of complexes 1 and 2 decreased with increasing pH but increased when reacted with D-fructose due to intermolecular vibration and suppression of intermolecular vibration, respectively, whereas the luminescence intensity of complexes 3 and 4 increased with both increasing pH and reaction with D-fructose due to the loss of TICT properties. The photophysical properties of complexes 1-4 and the TICT properties of complexes 3 and 4 were supported by density functional theory calculations.
Article
Chemistry, Organic
Daniel Pecorari, Andrea Mazzanti, Stefano Gianvittorio, Simone Foschi, Stefano Stagni, Valentina Fiorini, Michele Mancinelli
Summary: The stereodynamic properties of amino bis-mesityl-boranes bearing carbazole and benzocarbazole as donor heterocycles were investigated through dynamic NMR analysis and DFT calculations. Different pi-contributions to the B-N bond were found for the two series, leading to pronounced variations in the fluorescence spectra.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Multidisciplinary Sciences
Yongseok Hong, Maximilian Rudolf, Munnyon Kim, Juno Kim, Tim Schembri, Ana-Maria Krause, Kazutaka Shoyama, David Bialas, Merle I. S. Roehr, Taiha Joo, Hyungjun Kim, Dongho Kim, Frank Wuerthner
Summary: This study investigates the role of exciton coupling, exciton delocalization, and excimer state in facilitating the singlet fission process using a slip-stacked perylene bisimide array. The results provide insights into the structure-property relationship in dye arrays and have implications for the design of organic photonic and photovoltaic materials.
NATURE COMMUNICATIONS
(2022)
Article
Biochemistry & Molecular Biology
Bonghwan Chon, William Ghann, Jamal Uddin, Bahman Anvari, Vikas Kundra
Summary: The optical properties of the near-infrared fluorescence dye indocyanine green (ICG) depend on the solvent medium and dye concentration. In water, ICG forms H-aggregates at high concentrations, while at low concentrations it exists as monomers. In ethanol, ICG only exists as monomers without any H-aggregates.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Chao Wu, Weiqiang Liu, Kai Li, Gang Cheng, Jinfan Xiong, Teng Teng, Chi-Ming Che, Chuluo Yang
Summary: Intramolecular through-space charge-transfer (TSCT) excited states are utilized for developing thermally activated delayed fluorescence (TADF) emitters, with a series of precisely controlled TSCT emitters designed through alignment optimization of donor and acceptor segments. By increasing intramolecular pi-pi interactions, radiative decay rate of the lowest singlet excited state (S-1) is progressively enhanced with suppression of nonradiative decay, leading to significantly improved photoluminescence quantum yields of up to 0.99 in doped thin films. A high-efficiency electroluminescence device achieves a maximum external quantum efficiency (EQE) of 23.96% and maintains >20% at a brightness of 1000 cd m(-2), highlighting the importance of conformation control for high-efficiency intramolecular exciplex emitters.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Abobakr A. Mohamed, Sayed M. Derayea, Mahmoud A. Omar
Summary: A unique fluorescence method was developed for the specific and sensitive determination of tedizolid, a novel oxazolidinone antibacterial. This method relies on a fluorescence quencher-removal strategy to enhance the fluorescence signal in an acidic ethanolic system, allowing for detection in bio-fluids and commercial dosage form. The method showed high sensitivity and no interference, making it suitable for clinical application.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Spectroscopy
Yongfeng Wan, Dongwei Wang, Bo Li, Yuliang Liu, Lixia Zhu, Yu Wan, Qi Li, Hang Yin, Ying Shi
Summary: Stimuli-responsive luminogens with aggregation-induced emission and excited state intramolecular proton transfer (ESIPT) properties have a wide range of applications. In this study, a simple pressure-induced method was used to restrict the twisted intramolecular charge transfer (TICT) behavior, resulting in fluorescence enhancement and color shifts under high pressure. The inhibition of TICT was achieved by damaging the ESIPT process and restricting the rotation of a specific molecule. This approach offers a new strategy for the development of stimulus-responsive materials.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Applied
Fang-Zhou Li, Xing-Yu Li, Wenjun Ni, Zhi-Wei Wu, Changwei Lin, Gagik G. Gurzadyan, Gui-Chao Kuang
Summary: By finely tuning various parameters, the novel donor-acceptor-donor (D-A-D') type of BODIPY derivative BDP-1 exhibited single component white light emission (WLE), achieved through the balance between aggregation and energy transfer (ET) and intramolecular charge transfer (CT).
Article
Optics
Hongke Zhou, Xiucun Feng, Zixuan Guo, Zengxin Zhuang, Shengjie Fu, Xingliang Liu, Defang Xu
Summary: In this study, two bisarylic methanone derivatives with phenoxazine or phenothiazine as electron donors and carbonyl group as electron acceptor were investigated. These molecules exhibited obvious intramolecular charge transfer (ICT) effects and effective solid-state emissions, as well as high-contrast mechanofluorochromic (MFC) properties. The fluorescence colors of the powders changed with external mechanical stimulation and red shifts were observed in the photoluminescence (PL) spectra. The MFC behavior was found to be reversible and attributed to crystalline-to-amorphous transitions in the material.
JOURNAL OF LUMINESCENCE
(2022)
Article
Multidisciplinary Sciences
Jianwei Shen, Ajay Jha, Meng Lv, Guanyu Jiang, Qixu Zhao, Zihui Liu, Jinquan Chen, Yan Yang, Haitao Sun, Hong-Guang Duan, Zhenrong Sun
Summary: Merocyanine dyes are of great interest due to their nonlinear optical properties and solvatochromism. In this study, the excited state dynamics of a merocyanine dye known as HB194 were investigated, revealing solvent-dependent charge transfer dynamics. The excited state decays in different solvents showed multi-exponential components, with polar solvents inducing conformationally relaxed intramolecular charge transfer states and nonpolar solvents exhibiting solvent-stabilized ICT states. An anomalously red-shifted emission was observed in ethylene glycol, which was attributed to the presence of molecular dimers. This work emphasizes the importance of gaining molecular-level insight into system-solvent interactions for designing next-generation merocyanine-based solvatochromic dyes.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Dongwei Sun, Yudong Wen, Jia-Min Jin, Lu Zhou, Qiang Liu, Bo Liu, Xiaohui Wu, Nian Tang, Yongyan Zhou, Shaomin Ji, Yanping Huo
Summary: A new phenanthroimidazole-based emitter with an electron-rich phenoxazine (PIPXZ) has been developed, which possesses a locally twisted donor-pi-acceptor conformation due to the introduction of phenoxazine. The unique molecular structure of PIPXZ leads to an intense charge-transfer excited state and good fluorescence efficiency. The emitter has been systematically investigated and successfully applied in an organic light-emitting device, demonstrating a high external quantum efficiency.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Nanoscience & Nanotechnology
Seungtaek Oh, Md Rajibur Rahaman Khan, Giheon Choi, Jungyoon Seo, Eunyoung Park, Tae Kyu An, Yeong Don Park, Hwa Sung Lee
Summary: The research team designed an organic field-effect transistor (OFET)-based gas sensor with improved detection performance for ammonia by using solvatochromic dye as an auxiliary sensing medium. The sensitivity and linearity of the sensor were significantly enhanced, showing promising results for gas detection applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Sunghan Choi, Yun-Jae Kim, Soohwan Kim, Hyun Seok Lee, Jae Yoon Shin, Chul Hoon Kim, Ho-Jin Son, Sang Ook Kang
Summary: In precious-metal free photocatalytic systems, non-anchored D-pi-A dyes can efficiently transfer photoexcited electrons to solid catalytic particles through outer-sphere electron transfer. The dual photosensitization processing can achieve efficient CO2 reduction to CO.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Tingxuan Wang, Xueliang Hao, Liang Han, Yujin Li, Qing Ye, Yanhong Cui
Summary: Three novel D-A-pi-A carbazole sensitizing dyes were synthesized with fluorenone as the auxiliary acceptor, benzene, furan and thiophene as pi bridge and cyanoacrylic acid as the anchoring acceptor, showing improved efficiency in photoelectric conversion. The introduction of different bridge groups affects the short-circuit current density and open-circuit voltage differently, with the dye containing a benzene bridge exhibiting the highest efficiency.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Organic
Goshi Sugano, Kojiro Kawada, Masayuki Shigeta, Takeshi Hata, Hirokazu Urabe
TETRAHEDRON LETTERS
(2019)
Article
Chemistry, Organic
Ayana Furukawa, Takeshi Hata, Masayuki Shigeta, Hirokazu Urabe
TETRAHEDRON LETTERS
(2019)
Article
Chemistry, Organic
Amir Sharidan Sairi, Gen-ichi Konishi
ASIAN JOURNAL OF ORGANIC CHEMISTRY
(2019)
Article
Chemistry, Multidisciplinary
Takeshi Hata, Yoshiki Hayashi, Yuki Hasegawa, Masaaki Iwai, Ayumi Ishii, Miki Hasegawa, Masayuki Shigeta, Hirokazu Urabe
Article
Chemistry, Multidisciplinary
Riki Iwai, Satoshi Suzuki, Shunsuke Sasaki, Amir Sharidan Sairi, Kazunobu Igawa, Tomoyoshi Suenobu, Keiji Morokuma, Gen-ichi Konishi
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Review
Chemistry, Multidisciplinary
Satoshi Suzuki, Shunsuke Sasaki, Amir Sharidan Sairi, Riki Iwai, Ben Zhong Tang, Gen-ichi Konishi
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Chemistry, Multidisciplinary
Li-Hsiang Wang, Yuki Nagashima, Masato Abekura, Hidehiro Uekusa, Gen-ichi Konishi, Ken Tanaka
Summary: A high-yielding new route to substituted cycloparaphenylenes has been developed, demonstrating definite aggregation-induced emission properties. The synthesized compound is a novel AIE-active cycloarylene that differs from well-known AIE luminogens such as tetraphenylethene and 1,2,4,5-tetraphenylbenzene skeletons. Single-crystal X-ray diffraction analyses reveal highly ordered packing structures.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yoshimichi Shimomura, Kazunobu Igawa, Shunsuke Sasaki, Noritaka Sakakibara, Raita Goseki, Gen-ichi Konishi
Summary: By introducing propylene moieties as bridges, we have successfully designed compact crystalline dyes and suppressed intermolecular electronic interactions, achieving monomeric emission.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Ryuichi Shimogawa, Yuki Muroi, Naoya Noguchi, Gen-ichi Konishi, Toshiro Takao, Hiroharu Suzuki
Summary: This study investigates the thermal and photo-induced reactions of [Cp*Ru(mu- H)4RuCp*] with benzene and its derivatives, revealing the high tolerance and selectivity of the photo-induced reaction.
Article
Chemistry, Multidisciplinary
Yoshimichi Shimomura, Gen-ichi Konishi
Summary: Multiple emission colors in solid-state organic fluorophores are important for improving light-emitting devices/materials. In this study, we synthesized two derivatives of di-bridged-distyrylbenzene that showed bright red-orange and red fluorescence in the solid state, respectively. The introduction of bridging structures and the suppression of intermolecular electronic interactions were responsible for the enhanced solid-state emissions.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Polymer Science
Yoshimichi Shimomura, Masatoshi Tokita, Atsuya Kawamura, Junji Watanabe, Gen-ichi Konishi
Summary: This study aims to lower the isothermalization temperature (T-i) of poly(pentylene 4,4’-bibenzoate) (BB-5) and enhance the processability of poly(pentylene 4,4’-terphenyldicarboxylate) (T-5) compounds. Six fluorinated BB-5 (F-BB-5) compounds with T-i values at least 35°C lower than that of BB-5 are synthesized. Fluorinated T-5 (F-T-5) compounds exhibit isotropic phases before thermal decompositions, unlike T-5. Moreover, F-BB-5 and F-T-5 form unexpected crystalline and higher-order smectic phases, expanding the possibilities of low-molecular-weight liquid crystals.
Review
Chemistry, Multidisciplinary
Haoran Wang, Qiyao Li, Parvej Alam, Haotian Bai, Vandana Bhalla, Martin R. Bryce, Mingyue Cao, Chao Chen, Sijie Chen, Xirui Chen, Yuncong Chen, Zhijun Chen, Dongfeng Dang, Dan Ding, Siyang Ding, Yanhong Duo, Meng Gao, Wei He, Xuewen He, Xuechuan Hong, Yuning Hong, Jing-Jing Hu, Rong Hu, Xiaolin Huang, Tony D. James, Xingyu Jiang, Gen-ichi Konishi, Ryan T. K. Kwok, Jacky W. Y. Lam, Chunbin Li, Haidong Li, Kai Li, Nan Li, Wei-Jian Li, Ying Li, Xing-Jie Liang, Yongye Liang, Bin Liu, Guozhen Liu, Xingang Liu, Xiaoding Lou, Xin-Yue Lou, Liang Luo, Paul R. McGonigal, Zong-Wan Mao, Guangle Niu, Tze Cin Owyong, Andrea Pucci, Jun Qian, Anjun Qin, Zijie Qiu, Andrey L. Rogach, Bo Situ, Kazuo Tanaka, Youhong Tang, Bingnan Wang, Dong Wang, Jianguo Wang, Wei Wang, Wen-Xiong Wang, Wen-Jin Wang, Xinyuan Wang, Yi-Feng Wang, Shuizhu Wu, Yifan Wu, Yonghua Xiong, Ruohan Xu, Chenxu Yan, Saisai Yan, Hai-Bo Yang, Lin-Lin Yang, Mingwang Yang, Ying-Wei Yang, Juyoung Yoon, Shuang-Quan Zang, Jiangjiang Zhang, Pengfei Zhang, Tianfu Zhang, Xin Zhang, Xin Zhang, Na Zhao, Zheng Zhao, Jie Zheng, Lei Zheng, Zheng Zheng, Ming-Qiang Zhu, Wei-Hong Zhu, Hang Zou, Ben Zhong Tang
Summary: This review provides a comprehensive summary of the applications of aggregation-induced emission (AIE) luminogens in biological imaging, dynamic physiological processes, disease diagnosis and treatment, and specific analyte detection and monitoring. The review also discusses critical issues and future directions, aiming to promote the development of AIE in the fields of life and health.
Review
Chemistry, Multidisciplinary
Haoran Wang, Qiyao Li, Parvej Alam, Haotian Bai, Vandana Bhalla, Martin R. Bryce, Mingyue Cao, Chao Chen, Sijie Chen, Xirui Chen, Yuncong Chen, Zhijun Chen, Dongfeng Dang, Dan Ding, Siyang Ding, Yanhong Duo, Meng Gao, Wei He, Xuewen He, Xuechuan Hong, Yuning Hong, Jing-Jing Hu, Rong Hu, Xiaolin Huang, Tony D. James, Xingyu Jiang, Gen-ichi Konishi, Ryan T. K. Kwok, Jacky W. Y. Lam, Chunbin Li, Haidong Li, Kai Li, Nan Li, Wei-Jian Li, Ying Li, Xing-Jie Liang, Yongye Liang, Bin Liu, Guozhen Liu, Xingang Liu, Xiaoding Lou, Xin-Yue Lou, Liang Luo, Paul R. McGonigal, Zong-Wan Mao, Guangle Niu, Tze Cin Owyong, Andrea Pucci, Jun Qian, Anjun Qin, Zijie Qiu, Andrey L. Rogach, Bo Situ, Kazuo Tanaka, Youhong Tang, Bingnan Wang, Dong Wang, Jianguo Wang, Wei Wang, Wen-Xiong Wang, Wen-Jin Wang, Xinyuan Wang, Yi-Feng Wang, Shuizhu Wu, Yifan Wu, Yonghua Xiong, Ruohan Xu, Chenxu Yan, Saisai Yan, Hai-Bo Yang, Lin-Lin Yang, Mingwang Yang, Ying-Wei Yang, Juyoung Yoon, Shuang-Quan Zang, Jiangjiang Zhang, Pengfei Zhang, Tianfu Zhang, Xin Zhang, Xin Zhang, Na Zhao, Zheng Zhao, Jie Zheng, Lei Zheng, Zheng Zheng, Ming-Qiang Zhu, Wei-Hong Zhu, Hang Zou, Ben Zhong Tang
Summary: This review provides a comprehensive summary of the advantages and applications of aggregation-induced emission (AIE) luminogens in imaging of biological structure, dynamic physiological processes, disease diagnosis and treatment, as well as detection and monitoring of specific analytes. It also discusses future directions to promote research and development in the fields of life and health.
Article
Chemistry, Multidisciplinary
Yuki Arakawa, Shunsuke Sasaki, Kazunobu Igawa, Masatoshi Tokita, Gen-ichi Konishi, Hideto Tsuji
NEW JOURNAL OF CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Amir Sharidan Sairi, Kohei Kuwahara, Shunsuke Sasaki, Satoshi Suzuki, Kazunobu Igawa, Masatoshi Tokita, Shinji Ando, Keiji Morokuma, Tomoyoshi Suenobu, Gen-ichi Konishi
