Article
Chemistry, Multidisciplinary
Asesh Das, Biswajit Roy, Barlina Konwar, Aiyagari Ramesh, Gopal Das
Summary: Naphthalimide-based linear monourea receptors L-1 and L-2 can bind oxyanions and halide ions in both solid and solution states. Receptor L-1 efficiently fixes airborne CO2 induced by fluoride/hydroxide, forming air-stable dianions enclosed by n-TBA cations. Ligands L-1 and L-2 demonstrate bactericidal activity against E. coli MTCC 433 and are non-toxic to HEK 293 cells.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Physical
Priya Mullick, Gopal Das, Aiyagari Ramesh
Summary: This study demonstrates the use of 2-dodecylmalonic acid as a template in biomineralization-inspired synthesis of hydroxyapatite nanoparticles, showing that it can regulate particle size and shape at different concentrations. The self-assembly of the amphiphilic template plays a nuanced role in the mineralization process, guiding scaffold design for bone tissue engineering applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Environmental
Deepa Sachan, Gopal Das
Summary: In this study, a novel nanocomposite material was synthesized for the removal of toxic heavy metals from water. The nanocomposite showed high adsorption efficiency and followed Langmuir adsorption isotherm for copper and zinc. The findings suggest that this nanocomposite has the potential to be an eco-friendly, economical, and alternative adsorbent for heavy metal ions.
JOURNAL OF HAZARDOUS TOXIC AND RADIOACTIVE WASTE
(2022)
Article
Environmental Sciences
Deepa Sachan, Arnab Ghosh, Gopal Das
Summary: Salvinia minima proved to be an effective biosorbent for the selective removal of cationic dyes and heavy metal ions. The experimental conditions greatly influenced the adsorption process, and the maximum adsorption capacity for the dyes and heavy metal ions was determined.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Sagnik De, Oiyao Appun Pegu, Gopal Das
Summary: We designed three amphiphilic substituted urea compounds with different chain lengths. These hydrophobic amphiphiles exhibited aggregation-induced emission upon solvent switching. Microscopy was used to provide detailed information about the aggregates. The hydrophobicity of these AIEgens was utilized to create water-repelling fluorescent surfaces. The AIEgen, through photoinduced electron transfer-mediated mechanism, has been employed for the detection of nitroantibiotics. The analytical usefulness of the AIEgen in detecting nitroantibiotics in biofluids is being demonstrated.
Article
Chemistry, Applied
Partha Protim Bakal, Gopal Das
Summary: Potassium carbonate-activated biochar derived from Ricinus communis and Colocasia esculanta stems exhibited efficient removal of Cd2+ and Pb2+ from synthetic wastewater. The adsorption parameters and mechanisms were studied, with the findings indicating that biosorption followed the Freundlich isotherm and the pseudo-second-order kinetic model, and involved physical adsorption. The optimum conditions for Cd2+ and Pb2+ removal were determined, and the adsorption capacity was found to be 55 mg g(-1) for Cd and 76 mg g(-1) for Pb. Thermodynamics showed spontaneous and endothermic adsorption, and desorption studies indicated recyclability up to 5 cycles. These results highlight the potential of RCSB and CESB for efficient removal of heavy metal ions from aqueous environments.
JOURNAL OF WATER CHEMISTRY AND TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Partha Protim Bakal, Gopal Das
Summary: In this study, low-temperature Ricinus communis stem-activated biochar (RCSB) was synthesized using chemical activation and heating method. The RCSB showed high selective adsorption capability for methylene blue and malachite green, and can be regenerated for reuse. The novelty of this work lies in the low synthesis temperature and cost-effectiveness of the biochar.
WATER CONSERVATION SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Oiyao Appun Pegu, Rubi Moral, Gopal Das
Summary: The dipodal monourea anion receptors BPU-1 and BPU-2 can interact with various geometries of anions. BPU-1 selectively senses SO4 2-/HSO4 - in the aqueous medium, and both receptors undergo anion-induced intramolecular cyclization in the presence of F-/HO-.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Applied
Rubi Moral, Oiyao Appun Pegu, Gopal Das
Summary: Three receptors (L1-3) based on 4-(dimethylamino)cinnamaldehyde were prepared to investigate the influence of aromatic core substitution on self-assembly behavior. The receptors demonstrated different micro/nanostructures depending on solvent polarities and hydrogen-bonding abilities, which significantly affected the supramolecular self-assembly process. The selective sensing of picric acid among nitro-aromatic compounds, known for its high explosiveness, was thoroughly studied in both solid and solution states by the receptors, along with their mechanistic details. Real water samples were used to demonstrate the practical utility of this study, including economical paper-strip applications.
Review
Chemistry, Multidisciplinary
Megha Basak, Gopal Das
Summary: Fresh air and clean water are crucial for humans, fauna, and flora. Due to the high toxicity and widespread presence of NACs and VOCs in the environment, the development of chemosensors for these contaminants has gained significant attention. This review focuses on the latest advancements in fluorescent chemosensors, specifically small molecular frameworks, for NACs and VOCs from 2015 to 2022. The detection methods on various platforms and their potential applications in natural water bodies, vapor phase, and paper strip analysis are also discussed.
Article
Chemistry, Multidisciplinary
Megha Basak, Gopal Das
Summary: A versatile bifunctional probe, L-1, was developed for visualizing and quantitatively analyzing Hg2+ and GSH separately in water. Probe L-1 showed rapid sensing towards Hg2+ (LOD = about 17.35 ppb) and GSH (LOD = about 25.83 ppb) with a significant turn-on fluorescence response and red-shifted emission maxima. The sensing strategy was successfully applied to detect Hg2+ and GSH in contaminated natural water, simulated physiological media, and real biological samples. Affordable test strips for visual and quantitative detection of Hg2+ and GSH may have great potential for rapid preliminary environmental monitoring.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Sagnik De, Gopal Das
Summary: We designed five propellor-shaped molecules based on the quinoxaline scaffold with functional group variation. These molecules exhibit aggregation-induced emission and their responses to different solvents were studied spectroscopically and microscopically. The aggregation facet was analyzed in both solid and solution states. Notably, one of the molecules, L-2, showed specific interaction with a cationic surfactant unlike the other congeners which proceeded via disaggregation. Real sample analysis on freshwater and waste effluent samples demonstrated the analytical and environmental significance of these molecules.
Article
Chemistry, Multidisciplinary
Anamika Gogoi, Dipjyoti Dutta, Beatriz Gil-Hernandez, Sandeep Kumar Dey
Summary: In this paper, a method for the selective recognition and removal of sulfate and phosphates from aqueous media using nitrophenyl-functionalized tris-urea receptors and tris-thiourea receptors is presented. The selectivity of the receptors for sulfate and phosphates was evaluated through competitive extraction experiments. The results showed that the nitrophenyl-functionalized tris-urea receptors had higher extraction efficiency for sulfate, while the tris-thiourea receptors had higher extraction efficiency for phosphates.
Article
Chemistry, Multidisciplinary
Rais Ahmad Khan, Amal AlFawaz, Afnan Abdullah Alhamed, Nouf Abdulrahman AlMuryyi, Imran Hasan, Anup Paul, Sandeep Dey, Saad. G. Alshammari, Hadi D. Arman, Ali Alsalme
Summary: A new cobalt(II) coordination polymer 'Cp-Co' with a periodic 3D framework was designed, synthesized, and characterized. It exhibited outstanding photocatalytic degradation efficiency for methyl green (MG) dye under visible light irradiation, and the reaction variables were optimized.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Rubi Moral, Oiyao Appun Pegu, Gopal Das
Summary: This study reports the aggregation and sensing properties of two neutral benzimidazole-based urea receptors. R1 exhibits aggregation-induced emission (AIE) properties, while R2 shows typical aggregation-caused quenching (ACQ) behavior. Both R1 and R2 can sense SO42-/HSO4- in an aqueous medium, although with different binding affinities.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Vaibhav Bedi, Dipendu Mandal, Zahid Hussain, Shi-Ming Chen, Yile Wu, Zheng-Wang Qu, Stefan Grimme, Douglas W. Stephan
Summary: The reaction of (tBuO(2)CN)(2) with 9-BBN leads to the formation of a bicyclic heterocyclic compound, while its reactions with BF3 or [Et3Si][B(C6F5)(4)] result in the isolation of different compounds. Computational studies reveal that the steric and electronic properties of the Lewis acid are important in the formation of one of the compounds.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Chisa Itoh, Haruka Yoshino, Taku Kitayama, Wataru Kosaka, Hitoshi Miyasaka
Summary: A new synthetic route for constructing functional paddlewheel diruthenium(II,II) complexes was developed, utilizing Schiff base condensation reactions. The attached Schiff base groups significantly affected the electronic states of the resulting complexes, as revealed by cyclic voltammetry and DFT calculations.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Danrui Ni, Haozhe Wang, Xianghan Xu, Weiwei Xie, Robert J. Cava
Summary: A layered rhombohedral polymorph of indium(iii) triiodide is synthesized at high pressure and temperature. It has an orange color, which is different from ambient pressure InI3, which has a monoclinic molecular structure and a light-yellow color.
DALTON TRANSACTIONS
(2024)
Review
Chemistry, Inorganic & Nuclear
Juan Carlos Perez-Sanchez, Raquel P. Herrera, M. Concepcion Gimeno
Summary: Gold(II) complexes have been less utilized in catalysis compared to their gold(I) and gold(III) counterparts. However, gold(II) complexes offer potential in homo-coupling and cross-coupling reactions, as they are more easily accessible through simplified oxidation and reduction processes. Gold(II) exhibits characteristics of both soft acid gold(I) and hard acid gold(III). This review explores the unique reactivity and potential applications of gold(II) species, highlighting their significance in catalytic transformations.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Nighat Yousuf, Yanping Ma, Qaiser Mahmood, Wenjuan Zhang, Yizhou Wang, Hassan Saeed, Wen-Hua Sun
Summary: In this study, a series of structurally rigid cyclooctyl-fused iminopyridine iron complexes were synthesized and used with methylaluminoxane for isoprene polymerization. The extent of steric hindrance of the ligand framework was found to significantly affect catalytic performance, with less hindrance leading to better activity and stability.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Chenghao Song, Huiwei Du, Menglei Xu, Jie Yang, Xinyu Zhang, Jungan Wang, Yuanfang Zhang, Chengjun Gu, Rui Li, Tao Hong, Jingji Zhang, Jiangying Wang, Yongchun Ye
Summary: This study improves the performance of perovskite solar cells by using a dual-hole transport layer strategy. This strategy enhances the charge transfer efficiency of the transport layer, reduces charge recombination, and improves the quality of the perovskite film layer. Ultimately, the stability of the device is enhanced.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Mahender Singh, Aakash Yadav, Ranjit Singh, Chullikkattil P. Pradeep
Summary: A new aryl selenonium polyoxometalate hybrid was developed and compared with an aryl sulfonium polyoxometalate hybrid in terms of their photocatalytic properties. It was found that the aryl selenonium hybrid exhibited better catalytic performance, which could be attributed to the larger atomic radii of selenium stabilizing the photogenerated electron-hole pair more efficiently. Additionally, the generation of elemental selenium through cleavage of C-Se bonds during catalysis was observed.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Yuhan Xie, Boyu Dong, Xuemin Wang, Siyuan Wang, Jinxi Chen, Yongbing Lou
Summary: This study successfully fabricated visible-light-responsive three-dimensional core-shell CoSe2/ZnIn2S4 heterostructures and achieved attractive activity in photocatalytic hydrogen evolution. The presence of CoSe2 improved light absorption and accelerated charge transfer kinetics. The strong interaction between CoSe2 and ZnIn2S4 reduced charge recombination, further enhancing photocatalytic activity for hydrogen evolution.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Andre L. de O. Batista, Joao Marcos T. Palheta, Mauricio J. Piotrowski, Celso R. C. Rego, Diego Guedes-Sobrinho, Alexandre C. Dias
Summary: This study presents a simulation protocol that provides a solid foundation for exploring two-dimensional materials. Using the TiBr2 2H monolayer as an example, the study reveals its promising properties for optoelectronic and valleytronic applications, including its stability, spin-orbit coupling effects, and optical helicity selection rule.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Jiang Jiang, Zi-Wei Li, Zhi-Zhuan Zhang, Bin Tan, Zhao-Feng Wu, Xiao-Ying Huang
Summary: In this work, two metal organic frameworks (MOFs) containing {Cu2I2} clusters, Eu-CuI-INA and Sr-K-CuI-INA, were synthesized and characterized. Both materials have a three-dimensional structure with {Cu2I2} clusters coordinated by INA(-) ligands and Eu3+ or Sr2+ ions. The Sr-K-CuI-INA material exhibited sensitive fluorescence sensing behaviors towards cysteine and nitro-bearing molecules, showing potential applications in bio and explosive molecule sensing. This work provides a good reference for designing fluorescent MOF probes containing CuI molecules.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Zhiya Lin, Jiasheng Wu, Qianwen Ye, Yulong Chen, Hai Jia, Xiaohui Huang, Shaoming Ying
Summary: Na-ion batteries (NIBs) have attracted great interest as a potential technology for grid-scale energy storage due to the wide distribution, low cost, and environmental friendliness of sodium resources. However, their implementation is hindered by low rate capability and cycling stability caused by the large ionic size of Na+. In this study, a three-dimensional nanoarchitectured coral-like CoSe2@N-doped carbon (CL-CoSe2@NC) was synthesized, and it exhibited improved sodium storage properties with better electrode kinetics and a stable SEI film.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Ya-Qiong Zhang, Yu Zhang, Guoping Zeng, Rong-Zhen Liao, Man Li
Summary: The mechanism and selectivity of CO2 reduction under visible light were investigated using density functional calculations. The results showed that a tetradentate PNNP-type Iridium(III) complex exhibited high activity and selectivity in the reaction.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Sanyukta Ghosh, Shubhanth Jain, Soumya Ranjan Mishra, Gerda Rogl, Peter Rogl, Ernst Bauer, B. S. Murty, A. Govindaraj, Ramesh Chandra Mallik
Summary: In this study, reduced graphene oxide (rGO) was uniformly dispersed in the In0.5Co4Sb12 bulk material by ultrasonication, which effectively reduced the lattice thermal conductivity and improved the thermoelectric efficiency.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Mika Takeuchi, Yutaka Amao
Summary: This study developed an effective visible-light driven system for fumaric acid production using renewable resources such as biomass derivatives, providing an alternative to the current petroleum-based synthesis methods.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Juan Jian, Meiting Wang, Zhuo Wang, Jingwen Meng, Yuqin Yang, Limin Chang
Summary: Developing low-cost and self-supported bifunctional catalysts is crucial for highly efficient water splitting devices. In this study, nano-NiFe2O4 was directly grown onto iron foil surface and Sn4+ was introduced into the NiFe2O4. The resulting Sn-NiFe2O4/IF showed low overpotentials and high current densities during oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), making it a promising catalyst for large-scale hydrogen production.
DALTON TRANSACTIONS
(2024)