Article
Chemistry, Multidisciplinary
Dan Preston
Summary: This study presents a method for maintaining the accuracy of sequences by using complementary ligand arrangements at the metal center to form discrete and ordered metallo-sequences. These metallo-sequences fold into defined conformations through π-π interactions between electron-rich and -poor aromatic regions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Applied
Yi-Meng Duan, Kun-Peng Wang, Qi Zhang, Shaojin Chen, Zhi-Qiang Hu
Summary: In this study, a novel artificial light harvesting system was designed and constructed using a fluorescent tetragonal Pd(II)-metallacycle as a platform. The system achieved high energy transfer efficiency through the coordination of suitable acceptors.
Article
Engineering, Environmental
Tao Zhang, Liuchun Zheng, Huajian Yu, Jingjing Ren, Lijuan Zhang, Peipei Meng, Dan Peng
Summary: The study showed that the presence of Cd(II) decreased the adsorption of SMZ due to hydrophilic site competition, while SMZ increased the adsorption of Cd(II) through bridging and electrostatic shielding effects. This inhibitory and synergistic effects were more pronounced in the binary system at a pH of 7.5, indicating a dynamic balance between them depending on the system, pH value, and concentration ratio. DFT results suggested that SMZ coordinated more easily with Cd(II) at sulfonyl oxygen and nitrogen sites, and the cationic bridge of Cd(II) with SMZ mainly occurred in the sequential system, with a complexation-decomplexation-complexation balance in the binary system.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Analytical
Haiyue Peng, Feize Li, Yang Zeng, Min Li, Jiali Liao, Tu Lan, Yuanyou Yang, Jijun Yang, Ning Liu
Summary: A supramolecular organic material MA-IPA was prepared by low-temperature hydrothermal reaction, which showed good uranium affinity possibly due to the large amount of nitrogen and oxygen donors. The maximum sorption capacity of uranium on MA-IPA was found to be 317 mg g(-1) at pH 4.5, with a selectivity higher than 56% over other 10 co-existing metal cations. The outcome of this work can expand the application of supramolecular materials, especially in the separation of radionuclides and other metal cation from aqueous solution.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Environmental Sciences
Jiang-bo Huo, Guoce Yu, Jianlong Wang
Summary: A new adsorbent, PVA/GO composite, was prepared and used for the removal of Sr2+ from aqueous solution. The unique architecture of PVA/GO significantly enhanced the adsorption capacity toward Sr2+ and conformed to pseudo second-order kinetic model, Langmuir model, and Freundlich model. The complexation interaction between Sr2+ and oxygen atoms/p-electron domain of PVA/GO composite was primarily responsible for the adsorption mechanism.
Article
Chemistry, Applied
Zhichao Yang, Guoyang Zhang, Qing Teng, Xuan Zhu
Summary: This research explores the ability of XG to remove Pb2+ in the presence of xanthate. The study systematically investigates the effect of xanthate dosage, order of addition, pH value, and coexisting ions on the removal of Pb2+ using XG. The results show that xanthate can increase the removal rate of XG to Pb2+, and heavy metal ions have a competitive impact. The mechanism of XG removal of Pb2+ is also analyzed.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Biochemistry & Molecular Biology
A. I. Abd-Elhamid, E. M. Abu Elgoud, H. F. Aly
Summary: The adsorption characteristics of palladium from chloride aqueous solution onto the silica alginate (SA-Si) nanomaterial have been studied. The experiment showed that the pseudo-first-order model provided the best fitting for the adsorption of palladium ions, with an equilibrium time of 90.0 min. The Langmuir isotherm model was able to describe the adsorption isotherm result well, with a maximum adsorption capacity of 12.50 mg/g for Pd(II) on the SA-Si nanomaterial. Thermodynamic results indicated that the sorption of Pd(II) onto the SA-Si nanomaterial was endothermic and spontaneous. Additionally, the SA-Si nanomaterial showed effective adsorption for Pd(II) from various metal ions present in fission products.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Inorganic & Nuclear
Hong-Lin Lu, Jin Tong, Xiao-Peng Hu, Wei Deng, Shu-Yan Yu
Summary: A series of capsule-like anion receptors were successfully self-assembled by coordinating flexible amide based polypyrazole ligands with dipalladium corners in aqueous solution. Characterization of these complexes using various techniques confirmed their ability to unsymmetrically accommodate nitrate anions via hydrogen bonding and other weak interactions. NMR titrations in dimethyl sulfoxide showed high selectivity of complexes 1 and 2 for encapsulating nitrate ions.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Polymer Science
Jiajun Cao, Huangtianzhi Zhu, Liqing Shangguan, Yuezhou Liu, Peiren Liu, Qi Li, Yitao Wu, Feihe Huang
Summary: A novel pillar[5]arene-based 3D polymer network was developed for efficient iodine removal from water, showing fast and simple preparation method and no structural change after iodine capture, with the ability of being reused multiple times. This polymer network can efficiently adsorb iodine due to non-covalent interactions and hydrophobic nature of pillararene, making it a promising material for environmental remediation.
Article
Chemistry, Multidisciplinary
Valiyakath Abdul Rinshad, Jagabandhu Sahoo, Mangili Venkateswarulu, Neal Hickey, Mrinmoy De, Partha Sarathi Mukherjee
Summary: A rare gyrobifastigium architecture (GB) was constructed from a tetradentate donor (L) and Pd-II acceptor in DMSO, which converted to its isomeric tetragonal barrel (MB) when treated with water. The hydrophobic cavity of MB was used to encapsulate zinc-phthalocyanine (ZnPc), a photosensitizer for photodynamic therapy (PDT). Encapsulation of ZnPc in an aqueous host enhanced its solubility and enabled improved singlet oxygen generation, cellular uptake, and anticancer activity on HeLa cells, suggesting its potential as a strategy for enhancing PDT activity in water.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Prioti Choudhury Purba, Manoranjan Maity, Soumalya Bhattacharyya, Partha Sarathi Mukherjee
Summary: The study introduces a new Pd-6 barrel host for efficient encapsulation of fullerene extracts, addressing solubility and purification issues. The barrel exhibits strong binding affinity towards C-70 over C-60, resulting in predominant extraction of C-70 from a mixture. Fullerene-encapsulated barrels show efficient visible-light-induced singlet oxygen generation, with noteworthy preferential binding of C-70.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Jing Zhou, Ruonan Wu, Yanru Chen, Yebang Tan
Summary: A triply responsive amphiphilic polymer was synthesized, capable of self-assembling into micelles and forming host-guest complexes with CB[7], exhibiting high sensitivity to Fe3+. The design of a novel fluorescent probe based on disulfide bond and host-guest complexation for metal ion detection and drug delivery was introduced. The research results provide a new idea for the application of nano materials in the biomedical field.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Physical
Ying Yue, Hui Ding, Chen Chen
Summary: A mesoporous microsphere with excellent optical performance is constructed using self-assembly technique of silica (SiO2) nanoparticles. The sensor shows sensitivity to hydrogen gas (H-2) in the environment, with the introduction of Palladium (Pd) nanoparticles to enhance sensitivity. The sensors have shown linear shifts in whispering-gallery modes, making them advantageous for online monitoring of H-2 leakage.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Paper & Wood
Qi Zhang, Yangyang Luo, Dengke Wang, Zheming Yang, Jinxia Zheng, Mali Xie, Linjun Shao, Yijun Du, Chenze Qi
Summary: In this study, chitosan composite nanofibers were prepared by electrospinning and annealing process to improve their solvent resistance. The results showed that these composite nanofibers had better adsorption performance, especially for Pd2+ cations. The study also found that these composite nanofibers exhibited good adsorption selectivity and reusability.
Article
Materials Science, Multidisciplinary
Zhuo Wang, Su Bin Kang, Sung Wook Won
Summary: PEI-crosslinked chitin biosorbent showed efficient adsorption performance for recovering Pd(II) from acid solution, achieving adsorption equilibrium within 30 minutes for Pd(II) concentrations of 50-200 mg/L. The biosorbent demonstrated good reusability after up to three adsorption-desorption cycles.
Article
Chemistry, Organic
Liliana Barravecchia, Iago Neira, Elena Pazos, Carlos Peinador, Marcos D. Garcia
Summary: The paper discusses the development of viologen-amino acid hybrids through specific methods, and explores their potential applications as guests in cucurbituril hosts, as well as their potential roles in constructing two model tripeptides.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Organic
Arthur H. G. David, Pablo Garcia-Cerezo, Araceli G. Campana, Francisco Santoyo-Gonzalez, Victor Blanco
Summary: By utilizing a combination of CAD chemistry and thia-Michael addition, the researchers achieved irreversible unidirectional transportation of a ring through a linear component in a [2]rotaxane. The system's efficiency was demonstrated through in situ operation using NMR and HRMS techniques.
ORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Organic
Iago Neira, Carlos Peinador, Marcos D. Garcia
Summary: New triphenylphosphonium-capped cucurbit[7]uril (CB[7])- and cucurbit[8]uril (CB[8])-based [2]rotaxanes were successfully synthesized using a simultaneous threading-capping strategy. However, attempts to obtain the CB[8] analogue were unsuccessful due to unexpected strong interaction between the host and the phosphonium caps.
Article
Chemistry, Multidisciplinary
Amine Garci, Seifallah Abid, Arthur H. G. David, Marcos D. Codesal, Luka Dordevic, Ryan M. Young, Hiroaki Sai, Laura Le Bras, Aurelie Perrier, Marco Ovalle, Paige J. Brown, Charlotte L. Stern, Araceli G. Campana, Samuel Stupp, Michael R. Wasielewski, Victor Blanco, J. Fraser Stoddart
Summary: Here, we report a method for synthesizing highly charged enantiopure cyclophanes by incorporating axially chiral enantiomeric binaphthyl fluorophores into pyridinium-based macrocycles. These fluorescent tetracationic cyclophanes show a significant aggregation-induced emission (AIE) compared to their neutral optically active binaphthyl precursors. The AIE is attributed to limited torsional vibrations associated with the axes of chirality present in the chiral enantiomeric binaphthyl units and the fine-tuning of their electronic landscape within the cyclophane structure. Additionally, these highly charged enantiopure cyclophanes exhibit circularly polarized luminescence (CPL) responses both in solution and in the aggregated state. The dual properties of AIE and CPL in these tetracationic cyclophanes have great importance for the future development of photonic devices and bio-applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Liliana Barravecchia, Arturo Blanco-Gomez, Iago Neira, Raminta Skackauskaite, Alejandro Vila, Ana Rey-Rico, Carlos Peinador, Marcos D. Garcia
Summary: We present a new class of pH-responsive viologen analogues called vermellogens, which are synthesized efficiently in aqueous media using hydrazone exchange reactions. The vermellogens show significant pH-responsivity and the parent analogue, N,N'-dimethylated vermellogen, exhibits anion-recognition abilities and non-toxicity. The host-guest chemistry of the vermellogens with macrocyclic receptors has been studied experimentally and theoretically, showing similar behavior to a known herbicide but with different redox reactive capabilities.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Inorganic & Nuclear
Iago Neira, Olaya Domarco, Tamara Rama, Victor Blanco, Carlos Peinador, Marcos D. D. Garcia, Jose M. Quintela
Summary: In this study, ditopic ligands incorporating various functional groups were self-assembled with Pd(ii) or Pt(ii) complexes, leading to the formation of metallacycles. The shape and nuclearity of the metallacycles were controlled through concentration changes and the addition of aromatic guests or other external stimuli.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Juan P. Mora-Fuentes, Marcos D. Codesal, Marco Reale, Carlos M. Cruz, Vicente G. Jimenez, Alice Sciortino, Marco Cannas, Fabrizio Messina, Victor Blanco, Araceli G. Campana
Summary: We synthesized and characterized a new type of nanohoop that contains a curved heptagon-containing pi-extended polycyclic aromatic hydrocarbon (PAH) unit. This nanohoop showed strong binding abilities with curved pi-systems such as fullerenes C-60 and C-70. The host-guest complexes formed between the nanohoop and fullerenes displayed rapid charge separation upon photoexcitation, indicating promising electron-donor properties.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Organic
Pablo Corton, Natalia Fernandez-Labandeira, Mauro Diaz-Abellas, Carlos Peinador, Elena Pazos, Arturo Blanco-Gomez, Marcos D. Garcia
Summary: A new polycationic pseudo[1]rotaxane was successfully synthesized through hydrazone bonds, self-assembled in excellent yield in aqueous media. The thermodynamically controlled process involves the [1 + 1] reaction of a bisaldehyde and a trishydrazine, formation of the macrocyclic part, conversion into pseudo[1]rotaxane, and the one-pot [1 + 1 + 1] condensation process. The obtained molecule exhibited the ability to form self-inclusion complexes and supramolecular aggregates in different concentration ranges.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Raquel Casares, Alvaro Martinez-Pinel, Sandra Rodriguez-Gonzalez, Irene R. Marquez, Luis Lezama, M. Teresa Gonzalez, Edmund Leary, Victor Blanco, Joel G. Fallaque, Cristina Diaz, Fernando Martin, Juan M. Cuerva, Alba Millan
Summary: A strategy for modulating the optoelectronic and magnetic properties of indeno[1,2-b]fluorene has been developed. Introducing specific groups in the molecule leads to redshifted absorption maxima and a narrowed HOMO-LUMO energy gap. The single-molecule conductance of antiaromatic indeno[1,2-b]fluorene has also been studied, showing higher values compared to a reference molecule.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
