Article
Materials Science, Textiles
Aleksandra Ivanovska, Ivana Brankovic, Jelena Ladarevic, Leposava Pavun, Mirjana Kostic
Summary: Oxidation treatment can enhance the adsorption capacity of raw jute fabric for the textile dye Congo Red; the surface properties and adsorption behavior of the fabric are sensitive to solution pH, contact time, and initial dye concentration; the Langmuir isotherm model is suitable to describe the adsorption behavior of CR on jute fabric; the adsorption process is spontaneous and endothermic; repulsion, hydrogen bonding, and π-π stacking interactions may be involved in the binding of CR on jute fabric.
JOURNAL OF ENGINEERED FIBERS AND FABRICS
(2022)
Article
Spectroscopy
Huamiao Zhang, Minggang Tian, Rui Yang, Xiuquan He, Xiaoqiang Yu
Summary: A universal strategy for designing pH probes using the pH-dependent reversible intramolecular reaction of spiro-oxazolidine was developed, leading to short emission in basic conditions and significantly red-shifted emission in acidic environments. The emission shift of the probes exceeded 150 nm, with one probe demonstrating a shift of up to 210 nm, outperforming commercial and reported pH probes. The chemical sensing mechanism was confirmed through H-1 NMR spectra and density functional theory calculations, and the probes were successfully used to image lysosomal pH changes in a ratiometric manner.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Analytical
Mitsuhiro Seki, Ryotaro Wada, Hitoshi Muguruma
Summary: This study investigates the intramolecular cyclization reactions of catecholamines in the ECE process, revealing that the cyclization rate is pH-dependent and follows a specific order for different types of catecholamines. The electrochemical behavior is verified by analyzing the change in cathodic peak intensity due to the reduction of catecholamine-o-quinone. This work contributes to a deeper understanding of catecholamines and the development of novel strategies for electrochemical sensing.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Applied
Violaine Gerard, Christophe Galopin, Emel Ay, Valentin Launay, Fabrice Morlet-Savary, Bernadette Graff, Jacques Lalevee
Summary: The study examined the photostability and photodegradation pathway of L-Tryptophan in acidic aqueous solutions, suggesting a degradation occurring through a free radical pathway. Antioxidants such as chlorogenic acid, ascorbic acid, or potassium sorbate were found to significantly improve the photostability of L-Trp.
Article
Chemistry, Applied
Md. Abdur Razzak, Min-Soo Jeong, Min Jeong Kim, Seong-Jun Cho
Summary: In this study, the associative phase behavior of cricket protein isolate (CPI) and sodium alginate (AL) in aqueous solutions was investigated. The formation of soluble or insoluble complexes between the two biopolymers was found to be influenced by factors such as pH, biopolymer ratio, total biopolymer concentration, and ionic strength. Ionic interactions were identified as the main driving force for the formation of insoluble complexes, while hydrogen bonding and hydrophobic interactions also played significant roles.
Article
Engineering, Chemical
Yixuan Jiang, Zeng Huang, Ji Zhang, Xiao-Qi Yu, Shanshan Yu
Summary: We report a new copper coordination polymer that can selectively recognize and efficiently adsorb L-tryptophan from aqueous solutions. The adsorption capacity of the prepared copper coordination polymer for L-tryptophan is up to 1055 mg/g. The adsorption mechanism involves coordination interactions, hydrogen bonding interactions, electrostatic interactions, and host-guest interactions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Organic
Xia Chen, Yuling Lu, Zhenhua Guan, Lianghu Gu, Chunmei Chen, Hucheng Zhu, Zengwei Luo, Yonghui Zhang
Summary: A novel and convenient method has been developed for the facile synthesis of functionalized succinimide derivatives via intramolecular Alder-ene reaction of 1,6-enynes. The reaction features mild and metal-free conditions, providing a green and efficient approach to synthetically important succinimide scaffolds. Preliminary mechanistic studies suggest the involvement of a diradical intermediate in this transformation.
Article
Spectroscopy
Yunqian Ma, Hao Zhang, Kexin Wang, Duxia Cao, Mingkai Wang, Ruifang Guan, Chuanjian Zhou
Summary: This study introduces a biomimetic fluorescent molecule CA-AEP with a dipeptide structure that emits bright biomimetic fluorescence in aqueous solutions by adjusting the pH, a characteristic explained by the clustering-triggered emission (CTE) mechanism. CA-AEP can also be used to monitor the maximum dynamic pH in alkaline aqueous systems, and cytotoxicity assays show it is non-toxic to A549 cells. This work provides a new type of luminogen with potential applications in environmental monitoring and cell biology.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Green & Sustainable Science & Technology
Junpeng Wang, Qing Zhen, Junwei Xin, Yu Wang, Xingchang Zhang
Summary: This study investigated the phosphate adsorption behavior of Al-modified Pisha sandstone (Al-PS) and found that the adsorption capacity increased with higher Al modification ratio. The electrostatic adsorption mechanism was proposed as the key process for phosphate adsorption by Al-PS.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Materials Science, Multidisciplinary
Mitsuo Asai, Satoko Honda, Nobuyuki Isshiki, Masahumi Takesue, Atsushi Hiraishi, Mayu Yamada, Kuniharu Takei
Summary: Flexible sensors can gather information from nonplanar surfaces, such as monitoring pH levels in industrial wastewater. Carbon nanotube field-effect transistors (CNT-FETs) are attractive transducers for flexible sensors due to their good electrical properties and mechanical flexibility. A simple method to sort semiconducting single-walled carbon nanotubes (s-SWNTs) in an aqueous system using dispersion and centrifugation is developed, leading to high-performance CNT-FETs with reduced hysteresis and improved bias stability. Real-time pH monitoring using ion-sensitive, field-effect transistors (ISFETs) based on CNT-FET is demonstrated.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Environmental Sciences
Mingling Xiao, Xiaofang Lai, Jun He, Jiahao Huang, Zhenhua Tang, Ruiwen Wu, Jikang Jian
Summary: In this study, FeS micro-flakes were successfully synthesized and showed good stability and dispersibility in water, leading to high efficiency in removing Hg(II). The sorption of Hg(II) on FeS micro-flakes was consistent with the pseudo-second-order kinetic model and Langmuir model, indicating monolayer sorption dominated by chemical sorption. The maximum sorption capacity was significantly higher than FeS nanoparticles and other Hg(II) scavengers. FeS (0.31 g/L) effectively removed >97.6% of 200 mg/L Hg(II) in the pH range of 2-12 at 30 degrees C. The removal mechanism involves chemical precipitation and surface adsorption. This study demonstrates the potential and viability of FeS micro-flakes for efficiently removing aqueous Hg(II).
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Ruiqi Bao, Dongdong Fu, Zhengquan Fan, Xianzhi Peng, Licheng Peng
Summary: This study investigated the aging process of microplastics in simulated seawater and their adsorption capacity for copper. The results showed that aged microplastics have higher sorption abilities and their adsorption capacity is influenced by pH. These findings provide a baseline for further studies on the toxicity of microplastics in combination with heavy metals in the environment.
Article
Chemistry, Physical
Avishek Saha, Kalachand Mahali, Puspal Mukherjee, Sintu Ganai, Aslam Hossain, A. M. A. Henaish, Simanta Kundu, Jahangeer Ahmed, Sanjay Roy
Summary: This study focuses on the solubilities and dissolution thermodynamical properties of L-histidine and L-tryptophan in pure water and aqua-ethanol medium. It is found that L-histidine is more soluble in water-rich region while L-tryptophan is more soluble in organic-rich region.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Review
Chemistry, Inorganic & Nuclear
Ziyong Chang, Liang Zeng, Chunbao Sun, Peng Zhao, Jiayu Wang, Lining Zhang, Yangge Zhu, Xiaoyue Qi
Summary: Efficient recovery of precious metals from aqueous solutions or wastewater using nanomaterials has become a hot topic, due to their unique physical and chemical properties. Different types of nano adsorbents exhibit various advantages and mechanisms in PM adsorption, providing important technical support for PM recycling.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Engineering, Environmental
Yuanyuan Zhu, Songkun Zeng, Wenqi Gong, Xinrui Chen, Chen Xiao, Huili Ma, Weiguo Zhu, Jun Yeob Lee, Yafei Wang
Summary: This research focuses on achieving high-efficiency blue emission in solution processable OLED using TADF emitters. By using intramolecular cyclization, the compound DPS-BF-Ac is prepared, which shows promising blue emission with improved efficiency. Single crystal analysis reveals the significance of molecular rigidity and singlet-triplet energy difference in enhancing emission efficiency. The application of DPS-BF-Ac in a white OLED with a red dopant also leads to high external quantum efficiency.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Organic
Catherine Demangeat, Tarak Saied, Romain Ramozzi, Francesca Ingrosso, Manuel Ruiz-Lopez, Armen Panossian, Frederic R. Leroux, Yves Fort, Corinne Comoy
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2019)
Article
Chemistry, Physical
Tarek Trabelsi, Josep M. Anglada, Manuel F. Ruiz-Lopez, Joseph S. Francisco
JOURNAL OF CHEMICAL PHYSICS
(2019)
Article
Chemistry, Physical
Merlys Borges-Martinez, Daniel Alvarez, Nicolas Montenegro-Pohlhammer, M. Isabel Menendez, Ramon Lopez, Gloria Cardenas-Jiron
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Chemistry, Inorganic & Nuclear
Daniel Alvarez, Jesus Diaz, M. Isabel Menendez, Ramon Lopez
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2020)
Article
Nanoscience & Nanotechnology
Aratrika Chakraborty, Tania Chowdhury, Maria Isabel Menendez, Tanmay Chattopadhyay
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Applied
Rimpa Mondal, Aratrika Chakraborty, Rinku Ghanta, Maria Isabel Menendez, Tanmay Chattopadhyay
Summary: The catalytic efficiencies of a mononuclear Schiff base iron complex (FeL) and a reduced Schiff base one (FeRL) for the oxidation of alcohols have been assessed experimentally and theoretically. FeRL showed superior performance over FeL, attributed to the higher stability of the Fe-V=O species characterized through density functional theory calculations. FDFeRL, derived from FeRL for surface modification of magnetite nanoparticles, exhibited excellent catalytic activity in alcohol oxidation and could be easily recovered and reused with the help of a magnet.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Daniel Alvarez, M. Isabel Menendez, Ramon Lopez
Summary: New Re(I) carbonyl complexes are proposed for photodynamic therapy, with investigations on the effects of ligand conjugation, substituents, and CO replacement by phosphines. The study found that altering the ligand structure can significantly impact the absorption properties and the singlet-triplet energy gap of the complexes.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Purificacion Canadas, Julio Perez, Ramon Lopez, Lucia Riera
Summary: For the first time, the pyridine ring-opening of a metal-coordinated 1,10-phenanthroline has been demonstrated. The reaction of specific compounds followed by the addition of an electrophile resulted in the easy formation of ring-opening products at room temperature. The regiochemistry of the phenanthroline ring-opening products differed from those obtained with another ligand, and calculations suggest this is due to the avoidance of a larger loss of aromaticity. The new products were characterized both spectroscopically and through X-ray diffraction.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Physical
Maria Isabel Menendez, Nicolas Montenegro-Pohlhammer, Ricardo Pino-Rios, Rodrigo Urzua-Leiva, Simone Morales-Lovera, Merlys Borges-Martinez, Kevin Granados-Tavera, Ramon Lopez, Gloria Cardenas-Jiron
Summary: The photophysical, photovoltaic, and charge transport properties of fused core-modified expanded porphyrins were investigated using density functional theory and time-dependent density functional theory. The compounds showed absorption in the range of 700-970 nm for their Q bands and 500-645 nm for their Soret bands. The presence of thiophene rings in the macrocycle led to a bathochromic shift in the absorption wavelength, resulting in near-infrared absorptions. The charge transport study showed that pentaphyrin 1 and octaphyrin 4 were more conductive than hexaphyrin 2 or heptaphyrin 3.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Rebeca Gonzalez-Fernandez, Daniel Alvarez, Pascale Crochet, Victorio Cadierno, M. Isabel Menendeze, Ramon Lopez
CATALYSIS SCIENCE & TECHNOLOGY
(2020)
Article
Chemistry, Physical
Josep M. Anglada, Marilia T. C. Martins-Costa, Joseph S. Francisco, Manuel F. Ruiz-Lopez
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2019)
Article
Chemistry, Organic
Faiza Diaba, Gisela Trenchs
Summary: The first violet light-mediated synthesis of gamma- and delta-lactams from N-alkenyl trichloroacetamides is reported in this paper. The reactions are conducted in tetrahydrofuran or 2-methyltetrahydrofuran as the sole solvent without catalysts or additives, under non-anhydrous conditions in an air atmosphere where the solvent serves as the radical initiator.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Feroze Hussain, Sajjad Ahmed, Ashiq Hussain Padder, Qazi Naveed Ahmed
Summary: This study reports a novel and efficient one-pot synthesis method for mixed phosphorotrithioates, which does not require supplementary additives and shows broad applicability.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Hyunjin Oh, Ikyon Kim
Summary: A new 1,2,4-triazole-pyrrolo[1,2-a]pyrazine hybrid system, 6-acylpyrrolo[1,2-a][1,2,4]triazolo[5,1-c]pyrazine, was synthesized using a catalyst-free method. This method involved sequential exposure of pyrrole-2-carbonitrile-derived substrates to DMF-DMA and acyl hydrazide, resulting in the formation of acylated pyrazine and 1,2,4-triazole rings, enabling the installation of various substituents at specific positions on the core skeleton.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Ming Yan, Si-fan Wang, Yong-po Zhang, Jin-zhong Zhao, Zhuo Tang, Guang-xun Li
Summary: Here we developed an efficient photocatalytic approach for the convenient preparation of sulfinamides. The reaction allows for the gram-scale preparation of sulfinamides and the one-pot synthesis of various sulfonyl amides.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Farzaneh Bandehali-Naeini, Zahra Tanbakouchian, Noushin Farajinia-Lehi, Nicolas Mayer, Morteza Shiri, Martin Breugst
Summary: Two tandem catalytic systems were developed for the synthesis of novel 3,4-disubstituted maleimides using the same Ugi adducts. Different maleimide structures can be synthesized using either Pd or Cu catalysis.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Tanya Raghava, Anjan Chattopadhyay, Subhadeep Banerjee, Nivedita Sarkar
Summary: Amine substitution of two ortho fluorine atoms of tetrafluoroterephthalonitrile through SNAr chemistry is easily achievable. But further fluorine substitution is only possible under forcing conditions, yielding valuable fluorophores for bioimaging.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Review
Chemistry, Organic
Anju Chadha, Santosh Kumar Padhi, Selvaraj Stella, Sowmyalakshmi Venkataraman, Thangavelu Saravanan
Summary: Alcohol dehydrogenases are enzymes that use cofactors for oxidation or reduction reactions of alcohols or carbonyl compounds. They are utilized in green chemistry and have applications in the production of pharmaceuticals. Recombinant enzymes have solved the challenge of producing purified enzymes in large quantities. Engineered alcohol dehydrogenases have been used in asymmetric synthesis in industry. Various methods have been established for regenerating expensive cofactors to make the enzymatic process more efficient and economically viable.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)