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.
Article
Chemistry, Multidisciplinary
Shanggeng Li, Jiaming Hu, Shuai Zhang, Cheng Feng, Longfei Zhang, Cheng Wang, Zhibing He, Lin Zhang
Summary: The designed and synthesized two-photon initiator molecules exhibit excellent two-photon absorption and photoinitiation properties. Different electron donors and acceptors directly affect the photophysical properties of molecules, and their effects are interrelated.
Article
Biochemistry & Molecular Biology
Olesya Voronova, Sergey Zhuravkov, Elena Korotkova, Anton Artamonov, Evgenii Plotnikov
Summary: Phenothiazine and its derivatives were studied for their antioxidant activity, and optimal conditions for manifestation of this activity were found. The research showed that phenothiazine derivatives have potential antioxidant properties, which is important for developing complex preparations with antioxidant activity, including in psychiatric practice.
Article
Chemistry, Physical
Pengfei Yu, Yin Xiao
Summary: In this study, four bipolar blue-emitting materials were designed and synthesized, with carbazole, imidazole, and biphenyl as donor, acceptor, and p bridge, respectively. The incorporation of twisted phenylimidazole acceptor and appropriate substituents on the carbazole donor led to the successful development of a high-performance deep-blue OLED.
Article
Chemistry, Physical
Bhanumathi Nagarajan, C. D. Athrey, Ramachandran Elumalai, Sudakar Chandran, Dhamodharan Raghavachari
Summary: The study focuses on the use of naphthalimide as an auxiliary acceptor in PTz-based dyes for DSSC applications. Two new organic dyes were synthesized with N-alkylated phenothiazine core and electron acceptor incorporation, showing optimal efficiency in DSSCs with iodide/triiodide electrolyte.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Chemistry, Applied
Yue Liu, Changwen Wang, Xinjie Fang, Jingchao Zhang, Hao Liu, Junjie Ma, Qi An, Chuanfu Hou, Hongbo Zhao, Zhizhong Sun, Wenyi Chu
Summary: Five novel D-AD ' asymmetric type electrofluorochromic materials were designed and synthesized, showing good thermal stability and the ability to form uniform amorphous films. These compounds exhibited reversible redox-active and EFC characteristics, with UV absorption and PL spectra changing with applied voltage. The intramolecular charge transfer characteristics made them more sensitive to voltage changes, allowing for the successful fabrication of EFC devices with blue fluorescent switching characteristics.
Article
Chemistry, Multidisciplinary
Yunsheng Wang, Jie Yang, Manman Fang, Yanxiang Gong, Jia Ren, Liangjing Tu, Ben Zhong Tang, Zhen Li
Summary: Purely organic room-temperature phosphorescence (RTP) materials with stimulus response characteristic have attracted attention for their potential applications. The materials exhibit efficient RTP emissions and good photostability, making them attractive for various fields.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Jia Ren, Yu Tian, Yunsheng Wang, Jie Yang, Manman Fang, Zhen Li
Summary: This study provides a strategy to regulate molecular packing and room temperature phosphorescence (RTP) performance, and shows the significant impact of intermolecular π-π interactions on phosphorescence lifetime. Furthermore, these compounds were successfully used in silk-screen printing and multiple anti-counterfeiting techniques.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
Laila M. Nhari, Reda M. El-Shishtawy, Si Mohamed Bouzzine, Mohamed Hamidi, Abdullah M. Asiri
Summary: Three newly designed phenothiazine-based dyes were synthesized and their absorption and fluorescence properties were studied in different solvents. The dyes exhibited intense visible absorption and well-matched energy levels with reported sensitizers, making them potential candidates for use in photovoltaic devices.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Physical
Aisha R. Al-Marhabi, Reda M. El-Shishtawy, Si Mohamed Bouzzine, Mohamed Hamidi, Huda A. Al-Ghamdi, Khalid O. Al-Footy
Summary: Three new metal-free organic dyes with D-D-p-A-p-A structure were synthesized successfully and their chemical structures were confirmed. The synthesized dyes exhibited strong absorption bands, high molar absorptivity, and distinct red-shift and hyperchromic shifts for different donors. The HOMO and LUMO energy levels of the dyes were determined, and the bridged effect on the optoelectronic properties was investigated. The theoretical and experimental data showed good agreement. These dyes have great potential for use as sensitizers in dye-sensitized solar cells.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Physical
K. Periyasamy, P. Sakthivel, P. Vennila, P. M. Anbarasan, G. Venkatesh, Y. Sheena Mary
Summary: The synthesis and optimization of organic dyes based on phenothiazine and dibenzofuran for DSSCs were conducted in this study. The electronic and photovoltaic properties of the dyes were evaluated using various techniques, and the driving forces for electron injection and regeneration were assessed. Additionally, the effects of acceptor units, ?-conjugation bridges, phenothiazine, and dibenzofuran on the molecular energy levels were studied.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Instruments & Instrumentation
Shaojun Chen, Zhenghe Ren, Ming Chen, Heng Chen, Haitao Zhuo, Haiqiang Zhong
Summary: In this study, self-healing elastomers based on pi-pi stacking between imidazole groups were prepared using a simpler and faster photo-polymerization method. The elastomers showed excellent self-repairing properties and could recover their original strength and elongation at break at high temperatures. These new composite elastomers have great potential for applications in electronic skins, wearable devices, biomedical applications, and soft robotics.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Environmental
Jie Li, Congcong Fan, Xiaozhong Liang, Geng Li, Xiaoling Xie, Rong Zhang, Huixia Xu, Hua Wang, Kunpeng Guo
Summary: By developing carbazole luminophores with different molecular configurations, the study demonstrated the potential of achieving multi-responsive luminescent signals under thermal stimulus, providing a promising way for deep information-hiding.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Ohoud F. Al Sharif, Laila M. Nhari, Reda M. El-Shishtawy, Mohie E. M. Zayed, Abdullah M. Asiri
Summary: Four new imidazole-based dyes were synthesized and their solvatochromism, aggregation-induced emission (AIE) and mechanofluorochromic (MFC) properties were studied. The dyes showed potential applications in optoelectronic devices.
Article
Biochemistry & Molecular Biology
Andrzej Olczak, Tomasz Pawlak, Sylwia Kaluzynska, Katarzyna Gobis, Izabela Korona-Glowniak, Katarzyna Susniak, Marcin Zaborowski, Malgorzata Szczesio
Summary: Three new crystal structures of 1H-benzo[d]imidazole derivatives were determined, which exhibited an identical hydrogen bond system, C(4), in their structures. The quality of the obtained samples was tested using solid-state NMR. These compounds were evaluated for their in vitro antibacterial activity against Gram-positive and Gram-negative bacteria, as well as their antifungal activity, based on selectivity. ADME calculations indicated the potential of these compounds as drug candidates.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Electrical & Electronic
Sonia Kotowicz, Agnieszka Katarzyna Pajak, Mateusz Korzec, Ewa Schab-Balcerzak
Summary: This article presents selected physicochemical properties of thiophene imines containing a free -NH2 group. The study focuses on investigating the impact of substituents in the imine bond structure on thermal, electrochemical, and optical properties. The synthesized compounds were tested as hole transporting materials in perovskite cells, and the presence of morpholine derivatives and methylbenzene units in the imines was found to have an advantageous effect on cell efficiency.
PRZEGLAD ELEKTROTECHNICZNY
(2022)
Article
Chemistry, Applied
Pawel Gnida, Aneta Slodek, Pavel Chulkin, Marharyta Vasylieva, Agnieszka Katarzyna Pajak, Aleksandra Seweryn, Marek Godlewski, Bartlomiej S. Witkowski, Grazyna Szafraniec-Gorol, Ewa Schab-Balcerzak
Summary: This study investigates the impact of the thickness of the TiO2 blocking layer on the performance of DSSCs based on a new D-D-pi-A architecture of metal-free organic dyes and commercial N719. The study finds that the thickness of the blocking layer plays an important role in cell performance.
Review
Polymer Science
Pawel Gnida, Muhammad Faisal Amin, Agnieszka Katarzyna Pajak, Bozena Jarzabek
Summary: Third-generation solar cells, such as dye-sensitized solar cells, bulk-heterojunction solar cells, and perovskite solar cells, are being extensively studied for their high conversion efficiencies. This paper highlights the use of polymers in various stages of device preparation, including as substrates, electrodes, electrolytes, and additives.
Article
Chemistry, Physical
Katarzyna Pydzinska-Bialek, Grzegorz Nowaczyk, Marcin Ziolek
Summary: In this study, solar cells with triple-cation perovskite were investigated using femtosecond transient absorption and steady-state absorption techniques. The results showed that the gold electrode influences the perovskite response and the kinetics at the interface. The analysis of transient absorption spectra provides insights into the interface processes.
CHEMISTRY OF MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Dawid Zych, Aneta Slodek
Summary: In this study, pyrene derivatives with two types of substituents were prepared and characterized, and compared with derivatives containing the same heteroaryl motif but substituted by only one type of alkyl. The photophysical properties of these molecules were evaluated, and it was found that the position and type of substituents have a significant impact on the photophysical properties of the pyrene framework.
Article
Materials Science, Multidisciplinary
Barbara Wilk, Sylvester Sahayaraj, Marcin Ziolek, Vivek Babu, Robert Kudrawiec, Konrad Wojciechowski
Summary: Metal halide perovskites of reduced dimensionality, especially quasi-2D materials, have gained significant attention in the field of perovskite solar cells due to their excellent moisture resistance and unique optoelectronic properties. In this study, a scalable deposition of quasi-2D perovskite thin films using an inkjet printing technique is developed, resulting in highly crystalline and uniform perovskite layers. The optimized precursor formulation and post-printing treatment enable good control over nucleation and crystal growth, leading to solar cells with high power conversion efficiency.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Physical
Mateusz Gierszewski, Adam Glinka, Marcin Ziolek
Summary: Co-sensitization of two or more light-absorbing compounds on a TiO2 surface has become a successful strategy in developing dye-sensitized solar cells. Our study focused on analyzing the effects of combining carbazole (MK2) and indoline (D205) dyes through various experiments and theoretical calculations. The addition of D205 to DSSC with MK2 led to improved cell fill factor and prevented electron recombination between TiO2 and the dyes, with evidence of concentration-dependent equilibrium between neutral and anionic forms of dyes in different solvents.
Article
Chemistry, Physical
Dawid Zych
Summary: This is the first comprehensive study on multiple chemisorption on TiO2 clusters and the effects of anchoring groups and substitution patterns on the efficacy of pyrene-based dyes in dye-sensitised solar cells (DSSCs). The study focuses on the chemisorption of various pyrene-based dyes on (TiO2)9 clusters as electron acceptors in DSSCs, investigating their geometries, electronic structures, absorption spectra, electron transfer, injection properties, and overall efficiency in dye-(TiO2)9 systems.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Spectroscopy
Sonia Kotowicz, Daiva Tavgeniene, Raminta Beresneviciute, Ernestas Zaleckas, Gintare Krucaite, Agnieszka Katarzyna Pajak, Mateusz Korzec, Jan Grzegorz Malecki, Marek Lipinski, Saulius Grigalevicius, Ewa Schab-Balcerzak
Summary: Fluorene-based low molar weight derivatives were synthesized using Suzuki reactions with key starting materials of 9-benzylidene-2,7-dibromofluorene or 3-(2,7-dibromofluoren-9-ylmethylen)-9-ethylcarbazole and various aryl boronic acids. The compounds exhibited high thermal stability and some showed a high glass transition temperature above 125°C. They also demonstrated electrochemical activity and a energy band gap below 2.97 eV. The investigations were supported by DFT calculations and the photovoltaic ability of the compounds was tested in organic-inorganic solar cells.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Physical
Krzysztof Szulc, Katarzyna Pydzinska-Bialek, Marcin Ziolek
Summary: A model of charge population decay upon ultrafast optical pulse excitation in perovskite solar cells is proposed and solved using numerical simulations. The model includes charge injections, diffusion, and recombination processes, and the results are verified by experimental data. The study reveals the best approaches for determining the crucial parameters that govern charge transfer dynamics in perovskite solar cells.
Article
Biochemistry & Molecular Biology
Agnieszka Katarzyna Pajak, Sonia Kotowicz, Pawel Gnida, Jan Grzegorz Malecki, Agnieszka Ciemiega, Adam Luczak, Jaroslaw Jung, Ewa Schab-Balcerzak
Summary: A series of thiophene-based azomethines with different core structures were synthesized and their thermal, optical, and electrochemical properties were investigated. The synthesized compounds showed the ability to form stable amorphous phases with high glass transition temperatures. They exhibited electrochemical activity and had a low energy band gap. Optical investigations revealed their absorption and weak emission properties. The synthesized compounds were also examined as hole transporting materials in hybrid solar cells.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Engineering, Electrical & Electronic
Agnieszka Katarzyna Pajak, Marek Lipinski, Ewa Schab-Balcerzak
Summary: The article presents the application of two 9,9'-bifluorenylidene derivatives with different alkoxy chain lengths as hole transporting materials in perovskite solar cells. The compound with ethoxyl groups achieved a higher efficiency compared to the reference cells.
PRZEGLAD ELEKTROTECHNICZNY
(2022)
