Article
Chemistry, Multidisciplinary
Wenqian Li, Xiaofeng Huang, Tengwu Zeng, Yahu A. Liu, Weibo Hu, Hui Yang, Yue-Biao Zhang, Ke Wen
Summary: The 2D covalent organic framework PyTz-COF shows exceptional optoelectronic properties, photocatalytic ability, and photoelectrochemical activity, making it suitable for solar energy harvesting and conversion.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Arthur B. S. Santos, Alex M. Manfredi, Cristian A. M. Salla, Giliandro Farias, Edivandro Girotto, Juliana Eccher, Eduard Westphal, Sergio F. Curcio, Thiago Cazati, Ivani Malvestiti, Eduardo H. L. Falcao, Ivan H. Bechtold, Hugo Gallardo
Summary: A new and versatile rigid core for luminescent liquid crystal was created through direct bonding between a thiazolo[5,4-d]thiazole and two 1,3,4-oxadiazole units, showing interesting and variable mesomorphic and photophysical properties. Different molecules with varying numbers of alkoxy chains synthesized from this core exhibited different liquid crystal behaviors and photophysical properties, with promising potential for optoelectronic applications. This work contributes to the development of thiazolo[5,4-d]thiazole in liquid crystals, showcasing its efficiency and versatility.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Zheng Li, Lu Li, Yan Wang, Ying-Wei Yang
Summary: A heteroatom-doped conjugated polymer with tunable bandgap was synthesized using pillararenes as the electron-rich C-2 symmetric nodes and thiazolo[5,4-d]thiazole as the electron-deficient linkage. The influence of pillararenes in regulating the band structure and photogenerated charge carrier transportation for photocatalytic environmental contaminant degradation has been revealed.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Ugursoy Olgun, Zeynep Dikmen, Hulya Cetin, Fatih Arican, Mustafa Gulfen
Summary: In this study, a series of thiazolo[5,4-d]thiazole molecules and their silver complexes were synthesized and their optical and electrochemical properties were investigated. It was found that the presence of hydroxy aryl groups and silver coordination altered the UV-vis. absorption spectra and band gap energies of the thiazolo[5,4-d]thiazole molecules. These compounds have the potential to be used as dye materials for photovoltaic solar cells.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Physical
Yun Li
Summary: Novel MFC materials (TPE-B, TPE-T) with D-pi-A scaffolds containing thiazolo[5,4-d]thiazole and TPE units were designed and prepared. It was found that TPE-B and TPE-T exhibited obvious AIE properties and reversible MFC behavior. In the solid state, mechanical force caused a red-shift of 25-28 nm, which could be recovered to the original state by solvent soaking. Powder XRD analysis revealed that the morphological change from crystalline to amorphous state was responsible for mechanochromism. Moreover, TPE-B and TPE-T could be used to construct rewritable information storage systems.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Engineering, Environmental
Maha Mohamed Samy, Islam M. A. Mekhemer, Mohamed Gamal Mohamed, Mohamed Hammad Elsayed, Kun-Han Lin, Yi-Kuan Chen, Tien-Lin Wu, Ho-Hsiu Chou, Shiao-Wei Kuo
Summary: This study presents a new approach of efficiently extracting H2 from H2O under visible light using conjugated microporous polymers, without the need for additional noble metals as co-catalysts. Through the integration of electron-rich pyrene and electron-deficient thiazolo[5,4-d]thiazole units, a donor-acceptor system was created with significantly improved H2 evolution rate.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Xia Li, Huimin Hao, Xianjun Lang
Summary: Recently, CMPs with TzTz linkages have attracted attention for their excellent photoelectric properties. These CMPs showed superior photocatalytic activity in selective oxidation of amines in ethanol, with TzTz-CMP-2 displaying the best performance in transforming amines into imines under blue-light irradiation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Arthur B. de S. Santos, Edivandro Girotto, Cristian A. M. Salla, Ivani Malvestiti, Eduardo H. L. Falcao, Ivan H. Bechtold, Hugo Gallardo
Summary: Two new mesogenic compounds with unique molecular structure show promising liquid-crystalline properties, including good thermal stability, smooth molecular packing, and excellent optoelectronic performance, making them potential candidates for technological applications.
Article
Chemistry, Applied
D. Zhu, X. Peng, P. Wagner, P. Xiao
Summary: This study investigated two homosubstituted thiazolo[5,4-d]thiazole derivatives as photoinitiators for both free radical and cationic polymerization, under LED@410 nm light irradiation. The results showed that these photoinitiating systems exhibited effective initiation abilities in both types of polymerization reactions, with variations in efficiency and performance depending on the polymer system.
Article
Chemistry, Applied
Abdelaziz Jouaiti, Valerio Giuso, Cristina Cebri, Pierluigi Mercandelli, Matteo Mauro
Summary: A novel family of TzTz fluorophores with alkylpyridine substituents of different lengths was investigated for their optical properties. The compounds displayed strong absorption and emission characteristics, with the core structure playing a major role in the emission. The positional isomerism and protonation of the peripheral pyridines further modulated the photophysical properties.
Article
Chemistry, Physical
Xia Li, Xiaoming Ma, Fulin Zhang, Xiaoyun Dong, Xianjun Lang
Summary: The conjugated microporous polymer (CMP) photocatalyst with the desired linkage thiazolo[5,4-d]thiazole (TzTz) successfully achieved selective formation of sulfoxides by aerobic oxidation of sulfides. TzTz-CMP-3 showed efficient formation of a wide range of sulfoxides with excellent product selectivities (up to 99%) under blue light irradiation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Applied
Fulin Zhang, Xia Li, Xiaoyun Dong, Huimin Hao, Xianjun Lang
Summary: This study demonstrates the application of TzTz-embedded COFs in photocatalytic organic transformations. By embedding TzTz into the building blocks of COFs, microspherical TpDTz-COFs were formed, which exhibited superior performance in blue light photocatalytic selective oxidation reactions.
CHINESE JOURNAL OF CATALYSIS
(2022)
Article
Polymer Science
Asta Dabuliene, Aiste Dainyte, Viktorija Andruleviciene, Ramunas Lygaitis, Sanjay Madhuran Punniyakoti, Ausra Tomkeviciene, Dolores Velasco, Mykola Obushak, Juozas Vidas Grazulevicius
Summary: Polymers and low-molar-mass-compounds with donor and acceptor moieties have attracted much attention for their potential applications in organic light-emitting diodes and other optoelectronic devices. This study focused on the synthesis of oligomers and corresponding low-molar-mass model compounds containing carbazole or triphenylamine units as donors and thiazolo[5,4-d]thiazole as an acceptor moiety. The properties of the synthesized compounds, including thermal, optical, photophysical, and electrochemical characteristics, were investigated.
Article
Chemistry, Applied
Chih-Ling Chang, Ahmed M. Elewa, Jing Han Wang, Ho-Hsiu Chou, Ahmed F. M. EL-Mahdy
Summary: This article reports a new type of conjugated microporous polymer photocatalyst, which achieves effective separation of photoinduced holes and electrons and absorbs visible light extensively for hydrogen production through synthesis and construction of a new acceptor unit and copolymerization with various donor units.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Physical
Fengwei Huang, Xiaoyun Dong, Yuexin Wang, Xianjun Lang
Summary: By narrowing the bandgap, CMPs can effectively utilize visible light without changing the relative position with suitable electron acceptors like TzTz. Two TzTz-bridged CMPs, TzTz-Bz and TzTz-BTT, were synthesized by condensation of dithiooxamide with benzene-1,3,5-tricarbaldehyde (Bz-CHO) and benzo[1,2-b:3,4-b':5,6-b]trithiophene-2,5,8-tricarbaldehyde (BTT-CHO) respectively. TzTz-BTT exhibited higher conversions in the selective formation of imines compared to TzTz-Bz due to its ability to capture more green light for electron and proton transfer.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Crystallography
Benson M. Kariuki, Bakr F. Abdel-Wahab, Mohamed S. Bekheit, Gamal A. El-Hiti
Summary: Two new multicomponent crystals consisting of 3,5-bis(4-methoxyphenyl)-4,5-dihydro-1H-pyrazole-1-carbothioamide (1) with 1,3-bis(4-methoxyphenyl)prop-2-en-1-one (2) and with dimethylformamide (DMF) were prepared and structurally characterized. The comparison of hydrogen bonding contacts between different crystal structures of 1 revealed variations in the orientation of the methoxy groups and the combinations of hydrogen bonding contacts. The involvement of different atoms in the hydrogen bonding contacts also differed between the pure compound and the multicomponent crystals.
Article
Chemistry, Inorganic & Nuclear
Benson M. Kariuki, Hanan A. Mohamed, Bakr F. Abdel-Wahab, Gamal A. El-Hiti
Summary: Unexpected ring closure of compound 3 under the action of sulfuric acid at room temperature resulted in the formation of compound 4 with a yield of 75%. The synthesized benzenesulfonic acid showed inhibitory activity against both Listeria monocytogenes and Escherichia coli, which was comparable to ampicillin and vancomycin.
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
(2023)
Article
Polymer Science
Rafid R. Arraq, Angham G. Hadi, Dina S. Ahmed, Gamal A. El-Hiti, Benson M. Kariuki, Amani A. Husain, Muna Bufaroosha, Emad Yousif
Summary: Poly(vinyl chloride) (PVC) has attractive properties such as low cost, acid and alkali resistance, and ease of molding, but it suffers from aging. Adding tin-cephalexin complexes to PVC can improve its stability to irradiation. This study investigates the effect of these complexes on the photodecomposition of PVC and confirms their role as stabilizers by reducing the rate of photodecomposition.
Article
Materials Science, Multidisciplinary
Lohona K. Soro, Richard C. Knighton, Fernando Avecilla, Waygen Thor, Frederic Przybilla, Olivier Jeannin, David Esteban-Gomez, Carlos Platas-Iglesias, Loic J. Charbonniere
Summary: Two homometallic ytterbium dimers were studied for their solution-state photoluminescence and upconversion properties. Both complexes displayed two-photon cooperative luminescence upconversion in the visible region (lambda(em) approximate to 510 nm) when excited at the near-infrared Yb F-2(5/2) <- F-2(7/2) absorption band at 980 nm. This miniaturization of the cooperative luminescence phenomenon to just two Yb ions provides conclusive evidence for the mechanistic origins of this process. Time-resolved measurements and excited-state modeling revealed a slow recombination of two singly excited ions Yb*Yb* into a virtual excited state, which ultimately resulted in the observed emission at approximate to 510 nm.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Okba Al Rahal, Benson M. Kariuki, Colan E. Hughes, P. Andrew Williams, Xiaoyan Xu, Simon Gaisford, Dinu Iuga, Kenneth D. M. Harris
Summary: In this study, the solid-state phase transition behavior of 1-iodoadamantane (1-IA) was investigated using various techniques. The results revealed complex phase transition behavior, with multiple low-temperature phases identified. Different crystals of phase A showed different phase transition pathways, indicating the presence of other factors influencing the phase transitions.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Organic
Bakr F. Abdel-Wahab, Abdelbasset A. Farahat, Benson M. Kariuki, Gamal A. El-Hiti
Summary: The reaction of 1-(5-methyl-1-(4-nitrophenyl)-1H-1,2,3-triazol-4-yl)ethan-1-one (1) with excess hydroxylamine hydrochloride (2 mole equivalents) in dry ethanol yielded (E)-1-(5-methyl-1-(4-nitrophenyl)-1H-1,2,3-triazol-4-yl)ethan-1-one oxime (2) in 86% yield. The structure of the new heterocycle 2 was confirmed using nuclear magnetic resonance spectroscopy, single crystal X-ray, and elemental analysis.
Article
Chemistry, Organic
Bakr F. Abdel-Wahab, Mohamed S. Bekheit, Benson M. Kariuki, Gamal A. El-Hiti
Summary: Equimolar equivalents of 1-(4-methoxyphenyl)-5-methyl-1H-1,2,3-triazole-4-carbohydrazide (1) and 2-acetylbenzofuran (2) reacted in anhydrous ethanol containing a catalytic amount of concentrated hydrochloric acid under reflux for 2 h to give (E)-N'-(1-(benzofuran-2-yl)ethylidene)-1-(4-methoxyphenyl)-5-methyl-1H-1,2,3-triazole-4-carbohydrazide (3) in 86% yield. The structure of compound 3 was confirmed using nuclear magnetic resonance and X-ray diffraction.
Article
Crystallography
Reham A. Mohamed-Ezzat, Benson M. Kariuki, Rasha A. Azzam
Summary: A N-(5-Acetyl-4-methylpyrimidin-2-yl)benzenesulfonamide was synthesized and characterized by single-crystal X-ray diffraction. In the crystal, π-π interactions between the phenyl and pyrimidine groups of neighboring molecules form molecular chains parallel to [010]. Adjacent molecular chains are connected by N-H...N hydrogen-bonding interactions between the pyrimidine and amine groups of neighboring molecules, resulting in a three-dimensional network.
ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS
(2023)
Article
Biochemistry & Molecular Biology
Heba E. Hashem, Abd El-Galil E. Amr, Abdulrahman A. Almehizia, Ahmed M. Naglah, Benson M. Kariuki, Heba A. Eassa, Eman S. Nossier
Summary: This study uses the nanoformulation method to prepare nanoparticles of a previously prepared compound, and investigates their cytotoxic activity and inhibitory effects against cancer cell lines. The nanoparticles show promising anti-cancer activity and improved effects on EGFR and CDK-2 / cyclin A2. They also regulate cancer biomarkers to exert their anti-cancer effects.
Article
Crystallography
Bakr F. Abdel-Wahab, Benson M. Kariuki, Hanan A. Mohamed, Gamal A. El-Hiti
Summary: A one-pot reaction was performed without any catalysts to react 4-methoxyaniline, phenyl isothiocyanate, and 2-bromoacetylbenzofuran in absolute ethanol, resulting in a yield of 83% for the synthesis of 4-(benzofuran-2-yl)-3-(4-methoxyphenyl)-N-phenylthiazol-2(3H)-imine. Under similar conditions, a mixture of 4-(benzofuran-2-yl)-3-(4-fluorophenyl)-N-phenylthiazol-2(3H)-imine and 4-(benzofuran-2-yl)-N-(4-fluorophenyl)-3-phenylthiazol-2(3H)-imine was obtained from the reaction of 4-fluoroaniline with a overall yield of 73%. Structural determination of the products was conducted using single-crystal diffraction after recrystallization from dimethylformamide.
Article
Materials Science, Multidisciplinary
Lucie Haye, Nour Fayad, Richard C. Knighton, Antoine Combes, Olivier Jeannin, Andrey Klymchenko, Thibault Gallavardin, Niko Hildebrandt, Loic J. Charbonniere, Andreas Reisch
Summary: This study investigates the physicochemical and photophysical properties of Re diimine complexes and Cy5 dyes coencapsulated in polymer nanoparticles (NPs), and their compatibility for bioimaging. The results show that encapsulation significantly enhances the photoluminescence brightness and lifetimes of Re complexes, while coencapsulation of Cy5 leads to bright near-infrared emission upon Re complex excitation. Furthermore, the Re-Cy5 NPs exhibit high-contrast photoluminescence imaging in mammalian cells.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Crystallography
Tamer Nasr, Benson M. Kariuki, Mai M. Elansary, Radwan Elhaggar, Wafaa Zaghary
Summary: The syntheses and structural characterization of two benzylidenehydrazine derivatives were reported. The properties of the molecules were characterized using various analytical techniques, and their structures were determined by single-crystal X-ray diffraction.
ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS
(2023)
Article
Polymer Science
Taylor B. Young, Owaen G. Guppy, Alysia J. Draper, Joshua M. Whitington, Benson M. Kariuki, Alison Paul, Mark Eaton, Simon J. A. Pope, Benjamin D. Ward
Summary: Polymers often lack the properties required for their intended applications. Additives such as plasticizers, flame retardants, stabilizers, and colorants are used to modify their physical properties to suit the final product. However, colorants pose challenges for recycling technologies as they cannot be removed through reprocessing. The authors have developed a method to prepare colored polymers by adding chromophore monomers to copolymerization reactions, achieving highly colored materials with minimal changes in properties from the base polymer. They have also successfully depolymerized the colored polymers and reformed them into colorless polymers, paving the way for recyclable polymers with tunable properties through the use of dopant-level monomers.
Article
Chemistry, Inorganic & Nuclear
Richard C. Knighton, Joseph M. Beames, Simon J. A. Pope
Summary: A series of photoluminescent Ru(II) polypyridine complexes with varying cationic charge were synthesized. The excited state properties of these complexes showed a variation in emission maxima, and a polycationic Ru(II) complex was demonstrated to sensitize a polyanionic Yb(III) complex in free solution.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Noor Emad, Gamal A. El-Hiti, Emad Yousif, Dina S. Ahmed, Marwa Fadhil, Benson M. Kariuki
Summary: This study reports the synthesis of a new material for storing carbon emissions, particularly carbon dioxide. The metal complexes synthesized have large surface areas and pore volumes, and exhibit high carbon dioxide storage capacity.
RESULTS IN CHEMISTRY
(2023)
Article
Chemistry, Organic
Geeta Devi Yadav, Pooja Chaudhary, Balaram Pani, Surendra Singh
Summary: Chiral transition metal complexes with privileged ligands are efficient catalysts for various asymmetric organic transformations. Transition metal complexes of C1-symmetric pyrrolidine-based ligands have been widely used in asymmetric organic reactions. However, a comprehensive review article on the transition metal complexes of chiral C1-symmetric pyrrolidine-based ligands derived from (L)-proline has not been published.
TETRAHEDRON LETTERS
(2024)
