Article
Chemistry, Organic
Sonia Sierra, David Dalmau, Sheila Higuera, Dario Cortes, Olga Crespo, Ana Jimenez, Alexandra Pop, Cristian Silvestru, Esteban P. Urriolabeitia
Summary: Irradiation of (Z)-2-phenyl-4-aryliden-5(4H)thiazolones 2 with blue light (465 nm) in CH2Cl2 solution induces [2 + 2]-photocycloaddition of the exocyclic C=C bonds, forming dispirocyclobutanes 3 with high stereoselectivity. Utilizing blue light (456 nm) in dry MeOH with BF3 center dot OEt2 results in monospirocyclobutanes 4 with full stereoselectivity, generating the epsilon-isomer. This methodology also leads to the formation of dihydrothiazoles 5 under certain reaction conditions.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Applied
Adrian-Alexandru Somesan, Sabina-Madalina Vieriu, Alexandru Craciun, Cristian Silvestru, Paul Chiroi, Andreea Nutu, Ancuta Jurj, Raduly Lajos, Ioana Berindan-Neagoe, Richard A. Varga
Summary: This study investigates the cytotoxic activity of several organotin(IV) compounds on lung cancer cell lines and normal lung cells, and discusses their synthetic protocols and structural characteristics.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Harzi Feriel, Youssef Arfaoui, Cristian Silvestru, Noura Fakhar Bourguiba
Summary: A new organic-inorganic hybrid compound, (C12H22N2)[CuCl4], has been synthesized and characterized. The crystal structure consists of mixed layers formed by organic cations and inorganic anions. Thermal behavior and optical properties have been studied, and the intermolecular interactions and crystal packing have been analyzed. The electronic distribution of the compound was rationalized through theoretical calculations.
JOURNAL OF COORDINATION CHEMISTRY
(2022)
Article
Chemistry, Physical
Andreea Anton, Albert Soran, Cristian Silvestru
Summary: Two new organobismuth(III) dimethyldithiocarbamates were synthesized, with compound 5 showing clean decomposition to Bi2S3 in a specific temperature range. The bonding interactions of the compounds were studied using DFT, NBO, and Hirshfeld surface analyses, and compared with experimental results from single crystal X-ray diffraction.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Organic
Sonia Sierra, M. Victoria Gomez, Ana Jimenez, Alexandra Pop, Cristian Silvestru, Maria Luisa Marin, Francisco Bosca, German Sastre, Enrique Gomez-Bengoa, Esteban P. Urriolabeitia
Summary: The [2+2] photocycloaddition of (Z)-2-phenyl-4-aryliden-5(4H)-oxazolones using a triplet photocatalyst has been investigated. The selective formation of cyclobutane-bis(oxazolone)s has been achieved, and the reaction mechanism has been studied using laser flash photolysis and density functional theory calculations.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Pascal Komorr, Marian Olaru, Emanuel Hupf, Stefan Mebs, Jens Beckmann
Summary: The majority of binary chalcogen fluorides are highly reactive and difficult to handle. This study demonstrates a convenient and safe method to obtain crystalline donor-acceptor complexes between sulfur and selenium difluorides and selenium and tellurium tetrafluorides using N-heterocyclic carbene (NHC) 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene (IPr), without the need for generating unstable EF2 (E=S, Se) or toxic and corrosive SeF4.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Caterina Afloarei, Ioana Barbul, Adrian-Alexandru Somesan, Cristian Silvestru, Richard A. Varga
Summary: A series of organometallic compounds were synthesized by reacting lithium compounds with chloroorganotin compounds, and characterized by various experimental techniques. The results showed that these compounds all possessed distorted trigonal bipyramidal geometry and formed different supramolecular aggregates in the solid state.
Article
Biochemistry & Molecular Biology
Sonia Sierra, David Dalmau, Juan V. Alegre-Requena, Alexandra Pop, Cristian Silvestru, Maria Luisa Marin, Francisco Bosca, Esteban P. Urriolabeitia
Summary: Under blue light irradiation, the 2-aryl-4-(E-3'-aryl-allylidene)-5(4H)-oxazolones 1 underwent [2+2]-photocycloaddition to form the unstable cyclobutane-bis(oxazolones) 2. Treatment with NaOMe/MeOH led to the ring-opening reaction of 2 and the formation of stable styryl-cyclobutane bis(amino acids) 3.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Crystallography
Claudia Caltagirone, Maria Carla Aragoni, Massimiliano Arca, Alexander John Blake, Francesco Demartin, Alessandra Garau, Enrico Podda, Alexandra Pop, Vito Lippolis, Cristian Silvestru
Summary: The article discusses the influence of various pendant arms on the structural chemistry of the 1,4,7-trithia-10-aza-cyclododecane ([12]aneNS(3)) macrocycle, and compares it with the coordination chemistry of all characterized functionalized derivatives of [12]aneNS(3).
Article
Chemistry, Multidisciplinary
Jiayao Zhang, Saurav Bhattacharya, Anja B. Mueller, Levente Kiss, Cristian Silvestru, Nikolai Kuhnert, Ulrich Kortz
Summary: The first discrete mixed platinum(iv)-gold(iii) oxoanion [(Pt2Au3O6)-Au-IV-O-III((CH3)(2)AsO2)(6)](-) (1) was synthesized in a simple one-pot procedure in aqueous solution at pH 7. It contains two equivalent (PtO6)-O-IV(As(CH3)(2))(3) units linked by three square-planar (AuO4)-O-III units. The sodium salt of 1 undergoes a clean single-crystal-to-single-crystal (SCSC) structural transformation upon rehydration and dehydration.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Gabriel Dunes, Albert Soran, Cristian Silvestru
Summary: This article reports a method for preparing a monoorganoantimony(III) dichloride, which has a unique crystal and molecular structure. The organic group acts as a pincer ligand, strongly coordinated to the metal center and leading to a special geometry. Additionally, intermolecular interactions were observed in the solid state, resulting in a three-dimensional supramolecular structure.
REVUE ROUMAINE DE CHIMIE
(2022)
Article
Chemistry, Inorganic & Nuclear
Gabriel Dunes, Albert Soran, Cristian Silvestru
Summary: A series of new organopnictogen compounds were synthesized via salt elimination reactions, and their structures and properties were characterized.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Organic
Carla Garcia-Sanz, Alicia Andreu, Blanca de las Rivas, Ana Jimenez, Alexandra Pop, Cristian Silvestru, Esteban P. Urriolabeitia, Jose M. Palomo
Summary: Different Pd complexes containing orthometallated push-pull oxazolones were successfully incorporated into two genetically engineered modified variants of the GTL enzyme, resulting in significantly increased catalytic activity, selectivity, and fluorescence intensity. Furthermore, the Pd-enzyme conjugates showed remarkable TOF values in the hydrogenation of arenes in aqueous media and demonstrated applicability in site-selective C-H activation reactions under mild conditions.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2021)
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)
