Article
Chemistry, Multidisciplinary
Arijit Jana, Madhuri Jash, Ajay Kumar Poonia, Ganesan Paramasivam, Md Rabiul Islam, Papri Chakraborty, Sudhadevi Antharjanam, Jan Machacek, Sundargopal Ghosh, Kumaran Nair Valsala Devi Adarsh, Tomas Base, Thalappil Pradeep
Summary: A silver nanocluster Ag-42 protected with both carboranes and triphenylphosphine has been successfully synthesized, which exhibits unique physicochemical properties. The study also reveals a light-activated transformation of Ag-42 to Ag-14 through a series of intermediate cluster formations.
Article
Chemistry, Multidisciplinary
Naoya Haraguchi, Naoki Ogiwara, Yoshitaka Kumabe, Soichi Kikkawa, Seiji Yamazoe, Takashi Tachikawa, Sayaka Uchida
Summary: Size-controlled Ag clusters with specific colors were synthesized using porous ionic crystals (PICs) as scaffolds and redox-active polyoxometalates (POMs) as electron sources. The cluster size and color emission were controlled by the reduction time and types of ions or elements in the PICs. This method provides a convenient way to obtain ligand-free Ag clusters with high yields and stability.
Article
Chemistry, Multidisciplinary
Kentaro Yonesato, Seiji Yamazoe, Daisuke Yokogawa, Kazuya Yamaguchi, Kosuke Suzuki
Summary: This study demonstrates that a molecular hybrid of an atomically precise {Ag-27}(17+) nanocluster and polyoxometalates (POMs) efficiently cleaves H-2 into protons and electrons. The Ag nanocluster accommodates electrons through the redox reaction, while the POM ligands play crucial roles in stabilizing the nanocluster, forming an interface for efficient H-2 cleavage, and storing the generated protons.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Physics, Multidisciplinary
Rasheed Shaik, Hari R. Varma, Mohamed El-Amine Madjet, Fulu Zheng, Thomas Frauenheim, Himadri S. Chakraborty
Summary: Light-induced energy confinement in nanoclusters through plasmon excitations influences various applications and can be probed by the resonant decay of these excitations. Transfer of a part of this decay amplitude to a second conjugated cluster offers control and efficacy in sharing energy nonlocally. This transfer can be detected experimentally using the photoelectron velocity map imaging technique.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Organic
Daniel Pecorari, Emanuele Giuliani, Andrea Mazzanti, Stefano Stagni, Valentina Fiorini, Giulia Vigarani, Francesco Zinna, Gennaro Pescitelli, Michele Mancinelli
Summary: Bis-aryl carbazole borane derivatives with emissive properties and axial chirality were synthesized. The resolution of a thermally stable atropisomeric pair (compound 1b), which has a B-C chiral axis, was achieved using chiral stationary-phase high-performance liquid chromatography (CSP-HPLC). The complete photophysical properties of all compounds were measured and simulated using time-dependent density functional theory (TD-DFT) calculations, and circularly polarized luminescence spectra were obtained for the atropisomers of compound 1b, with their absolute configuration determined by a TD-DFT simulation of the electronic circular dichroism (ECD) spectra.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Jing Wang, Shuping Xu, Xiangxin Xue, Lina Zhao, Weiqing Xu
Summary: This study investigates the effect of charge transfer (CT) interactions on the energy transfer (ET) process from cocrystal ligand groups to rare earth (RE) ions. The researchers doped Eu3+ and Tb3+ ions on the surfaces of Phen-TCNB and constructed organic cocrystal-type core-shell structures. The results reveal that the multiple luminescences of these structures can be adjusted by CT and ET, providing a new strategy for developing novel optoelectronic materials.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Optics
Fengcai Li, Yangyang Chen, Jiaying Xu, Hui Cang, Song Chen
Summary: In this study, luminescent organic cocrystals with interesting optical properties were synthesized using a simple supramolecular assembly strategy. Crystalline microtubes comprising organic charge transfer interactions were prepared by self-assembly. Experimental and theoretical studies provided insights into the relationship between structure and fluorescence effect.
JOURNAL OF LUMINESCENCE
(2024)
Article
Chemistry, Multidisciplinary
Ming Zhao, Zhiyu Yang, Lixin Ning, Zhiguo Xia
Summary: The study successfully designed and synthesized white NaLi3Si1-xO4:Eu2+ materials with defect engineering, achieving white luminescence in single-dopant activated solid phosphors. Reducing the Si content resulted in white emission, with a newly appeared broadband yellow peak attributed to charge-transfer transitions involving Eu2+ and nearby defects.
ADVANCED MATERIALS
(2021)
Article
Physics, Applied
Veronika Stara, Pavel Prochazka, Jakub Planer, Azin Shahsavar, Anton O. Makoveev, Tomas Skala, Matthias Blatnik, Jan Cechal
Summary: This study introduces monolayer-thick charge-injection layers based on aromatic carboxylic acids, which can induce an energy-level shift of up to 0.8 eV in subsequent layers, with a highly tunable range of 0.5 eV. The results show that the work function and energy-level positions of the charge-injection layers increase linearly with the density of induced dipoles, and the energy-level positions of subsequent layers follow the changes in the charge-injection layers.
PHYSICAL REVIEW APPLIED
(2022)
Article
Engineering, Environmental
Xiaofei Chen, Aibing Yang, Gengxin Wang, Mingfeng Wei, Ning Liu, Bao Li, Lixin Wu
Summary: Near infrared (NIR) absorption has been shown to efficiently convert low-energy light into heat energy, making it a promising approach to enhance catalytic activity. In this study, a charge transfer (CT) complex of 3,3',5,5' tetramethylbenzidine (TMBCT) was used as an on-site heater to prepare composite catalysts. These nano-assembled catalysts exhibited integrated NIR photothermal effect and significantly improved catalysis for the oxidation reactions of toluene and its derivatives.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Chemistry, Multidisciplinary
Narayan Sinha, Polina Yaltseva, Oliver S. Wenger
Summary: The nephelauxetic effect, which refers to the expansion of d-orbitals as a result of metal-ligand bond covalence, has been recognized for its importance in the design of new photoactive complexes using first-row transition metals. This effect can significantly impact the photophysical properties of 3d metal complexes in solution at room temperature. By exploiting the nephelauxetic effect, red luminescence in Cr-III and Mn-IV complexes has been shifted to the near-infrared spectral region, while charge-transfer excited states in Fe-II and Co-III complexes have been stabilized, improving their properties and application potential.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Shakkeeb Thazhathethil, Tatsuya Muramatsu, Nobuyuki Tamaoki, Christoph Weder, Yoshimitsu Sagara
Summary: This study reports a cyclophane-based supramolecular mechanophore that can indicate mechanical events through changes in its photophysical properties. The mechanophore exhibits orange emission in the absence of force, but mechanical deformation results in a change in emission color and intensity that correlates with the applied stress.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Yang-Lin Shen, Jun-Ling Jin, Guang-Xiong Duan, Peng-Yuan Yu, Yun-Peng Xie, Xing Lu
Summary: Four silver thiolate clusters with similar nestlike structures were studied, showing tunable solid-state emissions depending on the templating anions. The color of emissions could be adjusted from green to orange and then to red by changing the template anions, indicating a correlation to charge transfer between the templates and metal atoms. This work contributes to the understanding of the templating role of heteroanions and the relationship between structure and properties.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
H. Nalumaga, J. J. Schuyt, R. D. Breukers, G. V. M. Williams
Summary: Strained cuboid Yb-doped NaMgF3 nanoparticles were synthesized using a hydrothermal synthesis technique, showing consistent morphologies and crystal phases for different Yb concentrations. Photoluminescence was observed from O2- impurities, Yb3+, and Yb2+ before X-ray exposure, with Yb3+ luminescence being excited by ultraviolet stimulation through a charge transfer process. After X-ray exposure, the Yb2+ luminescence intensity increased due to the conversion of Yb3+ to Yb2+ by radiation, suggesting the potential application of this radiophotoluminescence effect in radiation dose detection and monitoring.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Nanoscience & Nanotechnology
Boyuan Hu, Jian Zhang, Yulin Yang, Jiaqi Wang, Wei Wang, Jiao Li, Shihui Liu, Debin Xia, Kaifeng Lin, Yayu Dong, Ruiqing Fan
Summary: In this study, a series of heteroatom-substituted polyoxometalates were utilized as dopants to achieve quantitative and controllable oxidation of Spiro-OMeTAD, resulting in improved performance of perovskite solar cells.
ACS APPLIED MATERIALS & INTERFACES
(2022)
