Article
Chemistry, Multidisciplinary
Siang-Yi Chang, Ahmed M. Elewa, Mohamed Gamal Mohamed, Islam M. A. Mekhemer, Maha Mohamed Samy, Kan Zhang, Ho-Hsiu Chou, Shiao-Wei Kuo
Summary: The importance of conjugated microporous polymers (CMPs) in photocatalytic hydrogen evolution is growing due to their UV-vis absorption, fluorescence, and carrier transport capacity. Dibenzo[g,p]chrysene exhibits notable photophysical and electrical properties. In this study, three types of TBN-based CMPs were synthesized for the first time and their reactivity in photocatalytic H2 evolution and energy storage applications were investigated. The TBN-TBN-BT CMP showed excellent capacity retention and high capacitor performance, while the TBN-TBN-TPA CMP had the highest hydrogen evolution rate.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Physical
Mohamed Gamal Mohamed, Santosh U. Sharma, Cheng-Han Yang, Maha Mohamed Samy, Ahmed A. K. Mohammed, Swetha Chaganti, Jyh-Tsung Lee, Shiao Wei-Kuo
Summary: In this study, two extended pi-conjugated microporous polymers containing anthraquinone moieties were synthesized and applied as organic cathodes in lithium-ion batteries. These polymers exhibited high discharge capacities and retention rates, surpassing other CMP materials. Furthermore, the cells incorporating these polymers showed excellent rate capability performance at high charge/discharge rates, with superior stability during long-term cycling confirmed by scanning electron microscopy.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Mohamed Gamal Mohamed, Swetha V. Chaganti, Santosh U. Sharma, Maha Mohamed Samy, Mohsin Ejaz, Jyh-Tsung Lee, Kan Zhang, Shiao-Wei Kuo
Summary: In this work, two PT-CMPs were designed and synthesized as organic electrode precursors in energy storage applications. The PT-CMPs exhibited moderate thermal stability and high porosity properties. The P-PT-CMP showed a high capacitance and stability in supercapacitor performance. The electrochemical performance of a symmetric coin supercapacitor also demonstrated its potential for real-life applications in electrical energy storage (EES).
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Mohamed Gamal Mohamed, Siang-Yi Chang, Moshin Ejaz, Maha Mohamed Samy, Aya Osama Mousa, Shiao-Wei Kuo
Summary: We synthesized two types of two-dimensional conjugated microporous polymers (CMPs), Py-BSU and TBN-BSU CMPs, through a Sonogashira cross-coupling reaction. These CMPs showed high thermal stability and had potential applications in supercapacitors and gas adsorption. The TBN-BSU CMP electrode exhibited better electrochemical characteristics and demonstrated excellent capacitance retention rate and CO2 uptake capacity.
Article
Chemistry, Physical
Tzu-Hsin Weng, Mohamed Gamal Mohamed, Santosh U. Sharma, Swetha Chaganti, Maha Mohamed Samy, Jyh-Tsung Lee, Shiao-Wei Kuo
Summary: In this study, three 3D conjugated microporous polymers (CMPs) containing triptycene (Try) moieties connected to thiophene (Th), pyrene (Py), and tetraphenylethene (TPE) units were prepared using one-pot polycondensation through Suzuki cross-coupling. The CMPs showed high thermal stabilities, specific surface areas, and pore volumes, as well as superior electrochemical performance. They exhibited high specific capacitances and capacity retentions, making them promising materials for real supercapacitor applications.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Mohammad Gholinejad, Faezeh Khosravi, Jose M. Sansano, Ramakrishnan Vishnuraj, Biji Pullithadathil
Summary: In this study, a Pd-free catalyst based on mesoporous magnesium oxide supported bimetallic AuNi nanoparticles (m-MgO@AuNi) was synthesized by hydrothermal method and successfully applied in the Sonogashira-Hagihara cross-coupling reaction. The catalyst exhibited high efficiency and recyclability in coupling reactions of aryl iodides and aryl bromides with alkynes. The synergistic effect between Au, Ni, and mesoporous MgO support played a key role in enhancing the catalytic activity of m-MgO@AuNi in the Sonogashira-Hagihara reaction.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Ebrahim Firouzeh, Foad Kazemi, Mohammad Gholinejad, Babak Kaboudin
Summary: In this study, a copper and amine-free photosensitized Sonogashira-Hagihara coupling reaction was achieved using Pd(OAc)(2) and p-nitrobenzophenone in N,N-dimethylformamide(DMF) under blue LED irradiation. The effect of different benzophenone derivatives as photosensitizers was investigated, and higher yields were obtained using p-nitrobenzophenone.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Chemistry, Applied
Xianyu Meng, Yuchuan Liu, Shun Wang, Yu Ye, Xiaowei Song, Zhiqiang Liang
Summary: This study synthesized four molecule-guided conjugated microporous polymers with imidazole derivative units, which were used for the capture of iodine in vapor and solution. The results showed that these polymers have higher iodine uptake and ImCMP-1 shows potential for encasing iodine.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Physical
Mohamed Gamal Mohamed, Maha Mohamed Samy, Tharwat Hassan Mansoure, Santosh U. Sharma, Ming-Shiuan Tsai, Jung-Hui Chen, Jyh-Tsung Lee, Shiao-Wei Kuo
Summary: In this study, we synthesized three 1,3,4-oxadiazole-linked conjugated microporous polymers (OXD-CMPs) through classic Sonogashira couplings. These OXD-CMPs interacted with single-walled carbon nanotubes (CNTs) through noncovalent pi-pi interactions, forming OXD-CMP/CNT composites suitable for supercapacitor devices.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Poonam Nagendra Singh, Mohamed Gamal Mohamed, Shiao-Wei Kuo
Summary: Conjugated microporous polymers (CMPs) have been actively studied as advanced electrode materials for energy storage applications due to their exceptional electrochemical performance and cycling stability. In this study, two CMPs were successfully created and the impact of substituting the redox-active unit at different positions was investigated. The findings showed that these CMPs exhibit moderate thermal stability and excellent capacitive properties, while maintaining long-term stability even under high current densities.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Applied
Minoru Waki, Shinji Inagaki
Summary: The periodic mesoporous organosilica containing 2,2'-bipyridine shows high efficiency in removing metal ions and catalyzing reactions due to its large surface area and small particles. It can be easily separated and reused in experiments.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Mohamed Gamal Mohamed, Mahmoud M. M. Ahmed, Wei-Ting Du, Shiao-Wei Kuo
Summary: In this study, two types of meso/microporous carbon materials were successfully synthesized, showing high specific surface area, total pore volume, good thermal stability, and amorphous character. Among them, TPE-CPOP1 displayed excellent CO2 uptake performance and specific capacitance after thermal treatment at 800 degrees Celsius.
Article
Chemistry, Multidisciplinary
Brenna K. Collins, Melissa Clough Mastry, Andreas Ehnbom, Nattamai Bhuvanesh, Michael B. Hall, John A. Gladysz
Summary: A series of complexes were synthesized and characterized, showing similar NMR and IR properties. However, cyclic voltammetry revealed only irreversible oxidations for these compounds. UV-visible spectra of the complexes displayed intense and red-shifted bands compared to mono-platinum or Pt(C equivalent to C)(2)Pt species.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Mohammad Gholinejad, Hamid Esmailoghli, Faezeh Khosravi, Jose M. Sansano
Summary: A palladium catalyst supported onto an ionic liquid-modified carbon nanotube was prepared and studied for its application in copper-free Sonogashira-Hagihara coupling reactions. The heterogeneous catalyst was successfully recycled for 5 consecutive identical reactions while maintaining its efficiency.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Zhitao Wang, Xiu-Mei Li, Hui Li
Summary: Covalent organic frameworks (COFs) are porous organic polymers with excellent stability and well-defined structures. In this study, two imine-based COFs (COF-OH and COF-F) were designed and constructed with micro-porosity and high stability. The presence of intramolecular hydrogen bonding and face-to-face stacking interaction contribute to the high porosity and stability of COF-OH and COF-F, respectively. These COFs also exhibit high porosity as active platforms for iodine and carbon dioxide uptake through weak interactions resulting from their porous structure and specific atom linkages in the aromatic skeleton.