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Shi J, Seo S, Schuster NJ, Kim H, Bent SF. Ionic Liquid-Mediated Route to Atomic Layer Deposition of Tin(II) Oxide via a C–C Bond Cleavage Ligand Modification Mechanism. J Am Chem Soc 2022; 144:21772-21782. [DOI: 10.1021/jacs.2c10257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Jingwei Shi
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Seunggi Seo
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Nathaniel J. Schuster
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Hyungjun Kim
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Stacey F. Bent
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
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Synthesis and Structural Characterization of an Amorphous and Photoluminescent Mixed Eu/Zr Coordination Compound, a Potential Marker for Gunshot Residues. SCI 2022. [DOI: 10.3390/sci4040043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Hydrogels based on mixed zirconium/europium ions and benzene tricarboxylic acid were synthesized by hydrothermal reaction. A solid glass-like material is formed upon drying, showing strong reddish luminescence. The system was characterized by solid-state nuclear magnetic resonance, thermal analyses, and infrared spectroscopy. The results reveal the amorphous character of the structure and the presence of at least four types of binding modes between the metal oxide clusters and benzene tricarboxylic acid. On the other hand, thermogravimetric analysis (TGA) showed high thermal stability, with the material decomposing at temperatures higher than 500 °C. The combination of intense Eu3+ luminescence with large thermal stability makes this material a strong candidate for application as a luminescent red marker for gunshot residue (GSR). As proof of concept, we show the feasibility of this application by performing shooting tests using our compound as a GSR marker. After the shots, the residual luminescent particles could be visualized in the triggered cartridge, inner the muzzle of the firearm, and a lower amount on the hands of the shooter, using a UV lamp (λ = 254 nm). Remarkably, our results also show that the Eu3+ emission for the GSR is very similar to that observed for the original solid material. These characteristics are of huge importance since they provide a chance to use smaller amounts of the marker in the ammunition, lowering the costs of potential industrial manufacturing processes.
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Santos MS, Freitas JCC, Dalmaschio CJ. Designed single-phase ZrO2 nanocrystals obtained by solvothermal syntheses. CrystEngComm 2020. [DOI: 10.1039/c9ce01992h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Crystal growth pathways controlled by the acidity, type and concentration of the capping agent lead to different nanostructures and crystalline phases.
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Affiliation(s)
- Mayara S. Santos
- Department of Chemistry
- Federal University of Espírito Santo
- Vitória
- Brazil
| | - Jair C. C. Freitas
- Laboratory of Carbon and Ceramic Materials
- Department of Physics
- Federal University of Espírito Santo
- Vitória
- Brazil
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Schleder GR, Azevedo GM, Nogueira IC, Rebelo QHF, Bettini J, Fazzio A, Leite ER. Decreasing Nanocrystal Structural Disorder by Ligand Exchange: An Experimental and Theoretical Analysis. J Phys Chem Lett 2019; 10:1471-1476. [PMID: 30868882 DOI: 10.1021/acs.jpclett.9b00439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Nanocrystals (NCs) present unique physicochemical properties arising from their size and the presence of ligands. Comprehending and controlling the ligand-crystal interactions as well as the ligand exchange process is one of the central themes in NC science nowadays. However, the relationship between NC structural disorder and the ligand exchange effect in the NC atomic structure is not yet sufficiently understood. Here we combine pair distribution function analysis from electron diffraction data, extended X-ray absorption fine structure, and high-resolution transmission electron microscopy as experimental techniques and first-principles density functional theory calculations to elucidate the ligand exchange effects in the ZrO2 NC structure. We report a substantial decrease in the structural disorder for ZrO2 NCs caused by strain rearrangements during the ligand exchange process. These results can have a direct impact on the development of functional nanomaterials, especially in properties controlled by structural disorder.
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Affiliation(s)
- Gabriel R Schleder
- Federal University of ABC (UFABC) , Santo André , São Paulo 09210-580 , Brazil
- Brazilian Nanotechnology National Laboratory (LNNano)/CNPEM , Campinas , São Paulo 13083-970 , Brazil
| | - Gustavo M Azevedo
- Brazilian Synchrotron Light Laboratory (LNLS)/CNPEM , Campinas , São Paulo 13083-970 , Brazil
- Federal University of Rio Grande do Sul (UFRGS) , Porto Alegre , Rio Grande do Sul 90040-060 , Brazil
| | - Içamira C Nogueira
- Federal University of Amazonas (UFAM) , Manaus , Amazonas 69080-900 , Brazil
| | - Querem H F Rebelo
- Federal University of Amazonas (UFAM) , Manaus , Amazonas 69080-900 , Brazil
- Federal University of Western Pará (UFOPA) , Santarém , Pará 68035-110 , Brazil
| | - Jefferson Bettini
- Brazilian Nanotechnology National Laboratory (LNNano)/CNPEM , Campinas , São Paulo 13083-970 , Brazil
| | - Adalberto Fazzio
- Federal University of ABC (UFABC) , Santo André , São Paulo 09210-580 , Brazil
- Brazilian Nanotechnology National Laboratory (LNNano)/CNPEM , Campinas , São Paulo 13083-970 , Brazil
| | - Edson R Leite
- Brazilian Nanotechnology National Laboratory (LNNano)/CNPEM , Campinas , São Paulo 13083-970 , Brazil
- Federal University of São Carlos (UFSCar) , São Carlos , São Paulo 13565-905 , Brazil
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Grisorio R, Di Clemente ME, Fanizza E, Allegretta I, Altamura D, Striccoli M, Terzano R, Giannini C, Irimia-Vladu M, Suranna GP. Exploring the surface chemistry of cesium lead halide perovskite nanocrystals. NANOSCALE 2019; 11:986-999. [PMID: 30569929 DOI: 10.1039/c8nr08011a] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Colloidal nanocrystals (NCs) of cesium lead halide perovskites (CsPbX3, X = Cl, Br or I) are emerging as an exciting class of optoelectronic materials, but the retention of their colloidal and structural integrity during isolation, purification and handling still represents a critical issue. The impelling questions concerning their intrinsic chemical instability are connected to the dynamic nature of the bonding between the inorganic surface and the long-chain capping ligands. However, the key aspects of CsPbX3's surface chemistry that directly impact their stability remain elusive. In this contribution, we provide an in-depth investigation of the surface properties of differently composed CsPbX3 NCs, prepared by traditional hot-injection methods. The study, mainly relying on solution NMR spectroscopy, is backed up by elemental analysis as well as morphological, structural and optical investigations. We ascertained that the nature of the ligand adsorption/desorption processes at the NC surface is dependent on its elemental composition, thus explaining the origin of the instability afflicting CsPbI3 NCs. We also evaluated the effect of NC purification as well as of the degradation pathways involving the organic shell on the surface chemistry of CsPbX3 NCs. This study paves the way for new post-functionalization strategies for this promising class of nanomaterials.
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Affiliation(s)
- Roberto Grisorio
- Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica (DICATECh), Politecnico di Bari, Via Orabona 4, 70125 Bari, Italy.
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Kulyk K, Palianytsia B, Alexander JD, Azizova L, Borysenko M, Kartel M, Larsson M, Kulik T. Kinetics of Valeric Acid Ketonization and Ketenization in Catalytic Pyrolysis on Nanosized SiO 2 , γ-Al 2 O 3 , CeO 2 /SiO 2 , Al 2 O 3 /SiO 2 and TiO 2 /SiO 2. Chemphyschem 2017; 18:1943-1955. [PMID: 28393449 DOI: 10.1002/cphc.201601370] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Indexed: 11/09/2022]
Abstract
Valeric acid is an important renewable platform chemical that can be produced efficiently from lignocellulosic biomass. Upgrading of valeric acid by catalytic pyrolysis has the potential to produce value added biofuels and chemicals on an industrial scale. Understanding the different mechanisms involved in the thermal transformations of valeric acid on the surface of nanometer-sized oxides is important for the development of efficient heterogeneously catalyzed pyrolytic conversion techniques. In this work, the thermal decomposition of valeric acid on the surface of nanoscale SiO2 , γ-Al2 O3 , CeO2 /SiO2 , Al2 O3 /SiO2 and TiO2 /SiO2 has been investigated by temperature-programmed desorption mass spectrometry (TPD MS). Fourier transform infrared spectroscopy (FTIR) has also been used to investigate the structure of valeric acid complexes on the oxide surfaces. Two main products of pyrolytic conversion were observed to be formed depending on the nano-catalyst used-dibutylketone and propylketene. Mechanisms of ketene and ketone formation from chemisorbed fragments of valeric acid are proposed and the kinetic parameters of the corresponding reactions were calculated. It was found that the activation energy of ketenization decreases in the order SiO2 >γ-Al2 O3 >TiO2 /SiO2 >Al2 O3 /SiO2 , and the activation energy of ketonization decreases in the order γ-Al2 O3 >CeO2 /SiO2 . Nano-oxide CeO2 /SiO2 was found to selectively catalyze the ketonization reaction.
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Affiliation(s)
- Kostiantyn Kulyk
- Stockholm University, AlbaNova University Center, Department of Physics, SE-106 91, Stockholm, Sweden
| | - Borys Palianytsia
- Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Street, 03164, Kyiv, Ukraine
| | - John D Alexander
- Stockholm University, AlbaNova University Center, Department of Physics, SE-106 91, Stockholm, Sweden
| | - Liana Azizova
- Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Street, 03164, Kyiv, Ukraine
| | - Mykola Borysenko
- Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Street, 03164, Kyiv, Ukraine
| | - Mykola Kartel
- Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Street, 03164, Kyiv, Ukraine
| | - Mats Larsson
- Stockholm University, AlbaNova University Center, Department of Physics, SE-106 91, Stockholm, Sweden
| | - Tetiana Kulik
- Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Street, 03164, Kyiv, Ukraine
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Deshmukh R, Niederberger M. Mechanistic Aspects in the Formation, Growth and Surface Functionalization of Metal Oxide Nanoparticles in Organic Solvents. Chemistry 2017; 23:8542-8570. [DOI: 10.1002/chem.201605957] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Rupali Deshmukh
- Laboratory for Multifunctional Materials, Department of Materials; ETH Zürich; Vladimir-Prelog-Weg 5 8093 Zürich Switzerland
| | - Markus Niederberger
- Laboratory for Multifunctional Materials, Department of Materials; ETH Zürich; Vladimir-Prelog-Weg 5 8093 Zürich Switzerland
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Functionalisation of Colloidal Transition Metal Sulphides Nanocrystals: A Fascinating and Challenging Playground for the Chemist. CRYSTALS 2017. [DOI: 10.3390/cryst7040110] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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