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, 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, Multidisciplinary
Joshua J. Sutton, Dan Preston, Philipp Traber, Johannes Steinmetzer, Xue Wu, Surajit Kayal, Xue-Z Sun, James D. Crowley, Michael W. George, Stephan Kupfer, Keith C. Gordon
Summary: The optical properties of two Re(CO)(3)(bpy)Cl complexes with different substituents were studied, revealing distinct charge transfer bands in their absorption spectra and two emissive states in their excited-state spectroscopy which are modulated by solvent. Time-resolved infrared spectroscopy identified the nature of the excited states in different solvents, with DFT calculations suggesting that the switching of properties induced by solvent is controlled by spin-orbit coupling.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
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
Chemistry, Physical
Jumi Park, Jooyoung Sung, Dongho Kim
Summary: In this study, the charge transfer (CT) processes in donor-pyreneacceptor (DPA) molecules were deciphered using various time-resolved spectroscopic measurements. The ultrafast CT rate of approximately 200 fs in DPA molecules was observed, indicating isoenergetic potential surfaces for LE and CT states. Strong electronic coupling between the LE and CT states was found upon the introduction of the acceptor to the pyrene moiety in DPA systems.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
John A. Clark, Damian Kusy, Olena Vakuliuk, Maciej Krzeszewski, Krzysztof J. Kochanowski, Beata Koszarna, Omar O'Mari, Denis Jacquemin, Daniel T. Gryko, Valentine I. Vullev
Summary: This study investigates the effects of electronic coupling through biaryl linkers on the excited-state symmetry breaking of hybrid dyes. It is found that strengthening the donor-acceptor electronic coupling decreases the charge transfer rates and the propensity for symmetry breaking. In cases of intermediate electronic coupling, the dyes exhibit white fluorescence.
Article
Multidisciplinary Sciences
Jing Wang, Xudong Jiang, Hongbo Wu, Guitao Feng, Hanyu Wu, Junyu Li, Yuanping Yi, Xunda Feng, Zaifei Ma, Weiwei Li, Koen Vandewal, Zheng Tang
Summary: This study demonstrates that high voltage losses in organic solar cells can be suppressed by controlling the spacing between the donor and acceptor materials, leading to improved power conversion efficiency. Increasing the DA spacing reduces non-radiative decay of charge carriers and enhances device voltage, pointing to a new research direction for breaking the performance bottleneck of organic solar cells.
NATURE COMMUNICATIONS
(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.
Article
Chemistry, Analytical
Levani Skhirtladze, Karolis Leitonas, Audrius Bucinskas, Kai Lin Woon, Dmytro Volyniuk, Rasa Keruckiene, Malek Mahmoudi, Mieczyslaw Lapkowski, Azhar Ariffin, Juozas Grazulevicius
Summary: A series of compounds with different donor moieties and 1,4-difluorobenzene unit as the acceptor were developed for optical sensors of oxygen. One compound, 2PS-2FPh, exhibited high sensitivity to low concentration of oxygen and showed strong room-temperature phosphorescence in a rigid matrix Zeonex. The increased molecular heterogeneity and the transformation of the hybrid local and charge transfer triplet state into locally excited triplet states were found to be the reasons for the high oxygen sensitivity of 2PS-2FPh.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
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
Energy & Fuels
Sebastian Lucas, Jochen Kammerer, Martin Pfannmoeller, Rasmus R. Schroeder, Yakun He, Ning Li, Christoph J. Brabec, Tim Leydecker, Paolo Samori, Tomasz Marszalek, Wojchiech Pisula, Elena Mena-Osteritz, Peter Baeuerle
Summary: A novel structural design of oligomeric donor-acceptor (D-A) dyads has been established, showing advantageous optoelectronic, charge transport, and self-organization properties in single-material organic solar cells (SMOSCs). Post-treatment by solvent vapor annealing has also been investigated, revealing a lamellar supramolecular order of the dyads with a D-A phase separation smaller than 2 nm. The precise distance between donor and acceptor moieties ensures the fundamental physical processes operative in organic solar cells and provides stabilization of D-A interfaces.
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, 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, Physical
Yutaka Maeda, Takayoshi Tsuchiya, Takashi Kikuchi, Hidefumi Nikawa, Tao Yang, Xiang Zhao, Zdenek Slanina, Mitsuaki Suzuki, Michio Yamada, Yongfu Lian, Shigeru Nagase, Xing Lu, Takeshi Akasaka
Article
Chemistry, Multidisciplinary
Takeshi Akasaka, Akira Nakata, Marc Rudolf, Wei-Wei Wang, Michio Yamada, Mitsuaki Suzuki, Yutaka Maeda, Ryo Aoyama, Takahiro Tsuchiya, Shigeru Nagase, Dirk M. Guldi
Article
Chemistry, Multidisciplinary
Satoru Sato, Hidefumi Nikawa, Shu Seki, Lu Wang, Guangfu Luo, Jing Lu, Masayuki Haranaka, Takahiro Tsuchiya, Shigeru Nagase, Takeshi Akasaka
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2012)
Article
Chemistry, Multidisciplinary
Takahiro Tsuchiya, Marc Rudolf, Silke Wolfrum, Shankara Gayathri Radhakrishnan, Ryo Aoyama, Yuya Yokosawa, Azusa Oshima, Takeshi Akasaka, Shigeru Nagase, Dirk M. Guldi
CHEMISTRY-A EUROPEAN JOURNAL
(2013)
Article
Chemistry, Physical
Zdenek Slanina, Filip Uhlik, Shyi-Long Lee, Ludwik Adamowicz, Lai Feng, Midori O. Ishitsuka, Takahiro Tsuchiya, Xiang Zhao, Shigeru Nagase
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
(2014)
Article
Chemistry, Inorganic & Nuclear
Hiroki Kurihara, Xing Lu, Yuko Iiduka, Hidefumi Nikawa, Makoto Hachiya, Naomi Mizorogi, Zdenek Slanina, Takahiro Tsuchiya, Shigeru Nagase, Takeshi Akasaka
INORGANIC CHEMISTRY
(2012)
Article
Chemistry, Inorganic & Nuclear
Mitsuaki Suzuki, Xing Lu, Satoru Sato, Hidefumi Nikawa, Naomi Mizorogi, Zdenek Slanina, Takahiro Tsuchiya, Shigeru Nagase, Takeshi Akasaka
INORGANIC CHEMISTRY
(2012)
Article
Chemistry, Multidisciplinary
Hiroki Kurihara, Yuto Iiduka, Yves Rubin, Markus Waelchli, Naomi Mizorogi, Zdenek Slanina, Takahiro Tsuchiya, Shigeru Nagase, Takeshi Akasaka
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2012)
Article
Chemistry, Multidisciplinary
Kumiko Sato, Masahiro Kako, Mitsuaki Suzuki, Naomi Mizorogi, Takahiro Tsuchiya, Marilyn M. Olmstead, Alan L. Balch, Takeshi Akasaka, Shigeru Nagase
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2012)
Article
Chemistry, Multidisciplinary
Yuta Takano, Zdenek Slanina, Jaime Mateos, Takayoshi Tsuchiya, Hirold Kurihara, Filip Uhlik, Maria Angeles Herranz, Nazario Martin, Shigeru Nagase, Takeshi Akasaka
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2014)
Article
Chemistry, Inorganic & Nuclear
Takeshi Akasaka, Takahiro Tsuchiya, Lai Feng, Yuta Takano, Shigeru Nagase
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
(2013)
Article
Chemistry, Multidisciplinary
Takahiro Tsuchiya, Reiya Umemura, Mutsumi Kaminaga, Shunsuke Kushida, Kei Ohkubo, Shin-Ichiro Noro, Yasuhiro Mazaki
Article
Chemistry, Multidisciplinary
Takahiro Tsuchiya, Yuka Katsuoka, Kenji Yoza, Hiroyasu Sato, Yasuhiro Mazaki
Editorial Material
Chemistry, Multidisciplinary
T. Tsuchiya, Y. Katsuoka, H. Sato, K. Yoza, Y. Mazaki
Article
Chemistry, Multidisciplinary
Takahiro Tsuchiya, Makoto Higashibeppu, Yasuhiro Mazaki
Summary: The construction of 1,2-position-connected azulene oligomers was achieved, and the crystal packing structure of terazulene was analyzed. The helical and syn-type structure with terminal azulene overlap was found to be more stable. Fused terazulenes (1,2''-closed and 1,8''-closed) were synthesized by Pd-catalyzed C-H/C-Br arylation, and their structures were analyzed using X-ray crystallography. The 1,8''-closed terazulene showed anti-aromatic properties according to Nucleus-independent chemical shift (NICS) calculations.