1
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Zhao M, Zhao Q, Sun Y, Jiao X, Xia Y, Chen D. Cations Induced Fluorescence Enhancement in Keggin-Al 13 for Quantitative Detection. Inorg Chem 2024; 63:18408-18416. [PMID: 39292956 DOI: 10.1021/acs.inorgchem.4c02200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/20/2024]
Abstract
The Keggin-Al13 hydroxide clusters serve as pivotal models for elucidating molecular pathways in geochemical reactions. In this study, we presented a strategy aiming at the quantitative detection of ε-Al13 Keggin clusters using photoluminescent spectra. Specifically, we manipulate the electronic structure of ε-Al13 by introducing Na ions onto the ε-Al13 surface, encapsulated within a Na-O3 motif. The Na-ion-modified ε-Al13 (Na-ε-Al13) cluster demonstrates incredible photoluminescent qualities, with fluorescence excitation and emission peaks centered at 365 and 436 nm, respectively. In addition, the fluorescence intensities display a linear dependence on the concentrations of Na-ε-Al13, with a detection limit of 15.4 μM. This correlation facilitates the quantitative and precise determination of Na-ε-Al13 concentrations via fluorescence. Both experimental characterizations and theoretical calculations underscore the importance of decorated Na ions in regulating the electronic structure of the ε-Al13 cluster. Lastly, the influence of external anions/cations on the photoluminescent properties of ε-Al13 primarily mirrors modifications to the nonradiative decay process, which is regulated via electrostatic interactions. This work demonstrates an effective strategy for quantitative detection of the ε-Al13 Keggin clusters through photoluminescent spectra.
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Affiliation(s)
- Minjuan Zhao
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, Shandong, China
| | - Qi Zhao
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, Shandong, China
| | - Yufei Sun
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, Shandong, China
| | - Xiuling Jiao
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, Shandong, China
| | - Yuguo Xia
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, Shandong, China
| | - Dairong Chen
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, Shandong, China
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2
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Tamura K, Oshima Y, Fuse Y, Nagaoka N, Kunoh T, Nakanishi M, Fujii T, Nanba T, Takada J. Eco-Benign Orange-Hued Pigment Derived from Aluminum-Enriched Biogenous Iron Oxide Sheaths. ACS OMEGA 2022; 7:12795-12802. [PMID: 35474768 PMCID: PMC9026029 DOI: 10.1021/acsomega.1c07390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 03/22/2022] [Indexed: 06/14/2023]
Abstract
Inorganic pigments have been widely used due to their low cost of production, strong hiding power, and chemical resistance; nevertheless, they have limited hue width and chromaticity. To eliminate these disadvantages, we herein propose the use of an ingenious biotemplate technique to produce Al-enriched biogenic iron oxide (BIOX) materials. Spectrophotometric color analysis showed that high levels of Al inclusion on heat-treated BIOX samples produced heightened yellowish hues and lightness. The Al-enriched BIOX sheaths exhibited a stable tubular structure and excellent thermal stability of color tones after heating at high temperatures and repetitive heat treatments. Ultrastructural analysis and mechanical destruction experiments revealed that the highly chromatic orange-hue of these pigments are ascribed probably to an ingenious cylindrical nanocomposite architecture composed of putative Fe-included low crystalline Al oxide regions and hematite particles embedded therein. The present work therefore demonstrates that the bioengineered material can serve as an epochal orange-hued inorganic pigment with low toxicity and marked thermostability that should meet large industrial demand.
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Affiliation(s)
- Katsunori Tamura
- Graduate
School of Natural Science and Technology, Okayama University, 700-8530 Okayama, Japan
- Bengala
Techno-Lab, 216-0007 Kawasaki-shi, Kanagawa, Japan
| | - Yuri Oshima
- Graduate
School of Natural Science and Technology, Okayama University, 700-8530 Okayama, Japan
| | - Yuta Fuse
- Graduate
School of Natural Science and Technology, Okayama University, 700-8530 Okayama, Japan
| | - Noriyuki Nagaoka
- Advanced
Research Center for Oral and Craniofacial Sciences, Okayama University, 700-8530 Okayama, Japan
| | - Tatsuki Kunoh
- Graduate
School of Natural Science and Technology, Okayama University, 700-8530 Okayama, Japan
| | - Makoto Nakanishi
- Graduate
School of Natural Science and Technology, Okayama University, 700-8530 Okayama, Japan
| | - Tatsuo Fujii
- Graduate
School of Natural Science and Technology, Okayama University, 700-8530 Okayama, Japan
| | - Tokuro Nanba
- Graduate
School of Environmental and Life Science, Okayama University, 700-8530 Okayama, Japan
| | - Jun Takada
- Graduate
School of Natural Science and Technology, Okayama University, 700-8530 Okayama, Japan
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3
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Heimann JE, Tucker JD, Huff LS, Kim YR, Ali J, Stroot MK, Welch XJ, White HE, Wilson ML, Wood CE, Gates GA, Rosenzweig Z, Bennett JW. Density Functional Theory (DFT) as a Nondestructive Probe in the Field of Art Conservation: Small-Molecule Adsorption on Aragonite Surfaces. ACS APPLIED MATERIALS & INTERFACES 2022; 14:13858-13871. [PMID: 35258292 DOI: 10.1021/acsami.1c23695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Humans have incorporated minerals in objects of cultural heritage importance for millennia. The surfaces of these objects, which often long outlast the humans that create them, are undeniably exposed to a diverse mixture of chemicals throughout their lifetimes. As of yet, the art conservation community lacks a nondestructive, accurate, and inexpensive flexible computational screening method to evaluate the potential impact of chemicals with art, as a complement to experimental studies. In this work, we propose periodic density functional theory (DFT) studies as a way to address this challenge, specifically for the aragonite phase of calcium carbonate, a mineral that has been used in pigments, marble statues, and limestone architecture since ancient times. Computational models allow art conservation scientists to better understand the atomistic impact of small-molecule adsorbates on common mineral surfaces across a wide variety of environmental conditions. To gain insight into the surface adsorption reactivity of aragonite, we use DFT to investigate the atomistic interactions present in small-molecule-surface interfaces. Our adsorbate set includes common solvents, atmospheric pollutants, and emerging contaminants. Chemicals that significantly disrupt the surface structure such as carboxylic acids and sulfur-containing molecules are highlighted. We also focus on comparing adsorption energies and changes in surface bonds, which allows for the identification of key features in the electronic structure presented in a projected-density-of-state analysis. The trends outlined here will guide future experiments and allow art conservators to gain a better understanding of how a wide range of molecules interact with an aragonite surface under variable conditions and in different environments.
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Affiliation(s)
- Jessica E Heimann
- Department of Chemistry and Biochemistry, University of Maryland Baltimore County, Baltimore, Maryland 21250, United States
| | - Jasper D Tucker
- Department of Chemistry and Biochemistry, University of Maryland Baltimore County, Baltimore, Maryland 21250, United States
| | - Layla S Huff
- Department of History, Geography, and Museum Studies, Morgan State University, Baltimore, Maryland 21251, United States
| | - Ye Rin Kim
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Jood Ali
- Mechanical Engineering Department, University of Maryland Baltimore County, Baltimore, Maryland 21250, United States
| | - M Kaylor Stroot
- Department of Chemistry, McDaniel College, Westminster, Maryland 21157, United States
| | - Xavier J Welch
- Biology Department, Morgan State University, Baltimore, Maryland 21251, United States
| | - Harley E White
- Department of Chemistry, McDaniel College, Westminster, Maryland 21157, United States
| | - Marcus L Wilson
- Department of Chemistry, Towson University, Towson, Maryland 21252, United States
| | - Cecelia E Wood
- Department of Chemistry and Biochemistry, St. Mary's College of Maryland, St. Mary's City, Maryland 20686, United States
| | - Glenn A Gates
- Walters Art Museum, Baltimore, Maryland 21201, United States
| | - Zeev Rosenzweig
- Department of Chemistry and Biochemistry, University of Maryland Baltimore County, Baltimore, Maryland 21250, United States
| | - Joseph W Bennett
- Department of Chemistry and Biochemistry, University of Maryland Baltimore County, Baltimore, Maryland 21250, United States
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4
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Shohel M, Bjorklund JL, Smith JA, Kravchuk DV, Mason SE, Forbes TZ. Formation of Nanoscale [Ge
4
O
16
Al
48
(OH)
108
(H
2
O)
24
]
20+
from Condensation of ϵ‐GeAl
12
8+
Keggin Polycations**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202017321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mohammad Shohel
- Department of Chemistry University of Iowa Iowa City IA 52242 USA
| | | | - Jack A. Smith
- Department of Chemistry University of Iowa Iowa City IA 52242 USA
| | | | - Sara E. Mason
- Department of Chemistry University of Iowa Iowa City IA 52242 USA
| | - Tori Z. Forbes
- Department of Chemistry University of Iowa Iowa City IA 52242 USA
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5
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Shohel M, Bjorklund JL, Smith JA, Kravchuk DV, Mason SE, Forbes TZ. Formation of Nanoscale [Ge 4 O 16 Al 48 (OH) 108 (H 2 O) 24 ] 20+ from Condensation of ϵ-GeAl 12 8+ Keggin Polycations*. Angew Chem Int Ed Engl 2021; 60:8755-8759. [PMID: 33482020 DOI: 10.1002/anie.202017321] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Indexed: 12/14/2022]
Abstract
Keggin-type polyaluminum cations belong to a unique class of compounds with their large positive charge, hydroxo bridges, and divergent isomerization/oligomerization. Previous reports indicated that oligomerization of this species can only occur through one isomer (δ), but herein we report the isolation of largest Keggin-type cluster that occurs through self-condensation of four ϵ-isomers ϵ-GeAl12 8+ to form [Ge4 O16 Al48 (OH)108 (H2 O)24 ]20+ cluster (Ge4 Al48 ). The cluster was crystallized and structurally characterized by single-crystal X-ray diffraction (SCXRD) and the elemental composition was confirmed by ICP-MS and SEM-EDS. Additional dynamic light scattering experiments confirms the presence of the Ge4 Al48 in thermally aged solutions. DFT calculations reveal that a single atom Ge substitution in tetrahedral site of ϵ-isomer is the key for the formation of Ge4 Al48 because it activates deprotonation at key surface sites that control the self-condensation process.
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Affiliation(s)
- Mohammad Shohel
- Department of Chemistry, University of Iowa, Iowa City, IA, 52242, USA
| | | | - Jack A Smith
- Department of Chemistry, University of Iowa, Iowa City, IA, 52242, USA
| | - Dmytro V Kravchuk
- Department of Chemistry, University of Iowa, Iowa City, IA, 52242, USA
| | - Sara E Mason
- Department of Chemistry, University of Iowa, Iowa City, IA, 52242, USA
| | - Tori Z Forbes
- Department of Chemistry, University of Iowa, Iowa City, IA, 52242, USA
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6
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Bjorklund JL, Shohel M, Bennett JW, Smith JA, Carolan ME, Hollar E, Forbes TZ, Mason SE. Density functional theory and thermodynamics analysis of MAl 12 Keggin substitution reactions: Insights into ion incorporation and experimental confirmation. J Chem Phys 2021; 154:064303. [PMID: 33588534 DOI: 10.1063/5.0038962] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Polyaluminum cations, such as the MAl12 Keggin, undergo atomic substitutions at the heteroatom site (M), where nanoclusters with M = Al3+, Ga3+, and Ge4+ have been experimentally studied. The identity of the heteroatom M has been shown to influence the structural and electronic properties of the nanocluster and the kinetics of ligand exchange reactions. To date, only three ε-analogs have been identified, and there is a need for a predictive model to guide experiment to the discovery of new MAl12 species. Here, we present a density functional theory (DFT) and thermodynamics approach to predicting favorable heteroatom substitution reactions, alongside structural analyses on hypothetical ε-MAl12 nanocluster models. We delineate trends in energetics and geometry based on heteroatom cation properties, finding that Al3+-O bond lengths are related to heteroatom cation size, charge, and speciation. Our analyses also enable us to identify potentially isolable new ε-MAl12 species, such as FeAl12 7+. Based upon these results, we evaluated the Al3+/Zn2+/Cr3+ system and determined that substitution of Cr3+ is unfavorable in the heteroatom site but is preferred for Zn2+, in agreement with the experimental structures. Complimentary experimental studies resulted in the isolation of Cr3+-substituted δ-Keggin species where Cr3+ substitution occurs only in the octahedral positions. The isolated structures Na[AlO4Al9.6Cr2.4(OH)24(H2O)12](2,6-NDS)4(H2O)22 (δ-CrnAl13-n-1) and Na[AlO4Al9.5Cr2.5(OH)24(H2O)12](2,7-NDS)4(H2O)18.5 (δ-CrnAl13-n-2) are the first pieces of evidence of mixed Al3+/Cr3+ Keggin-type nanoclusters that prefer substitution at the octahedral sites. The δ-CrnAl13-n-2 structure also exhibits a unique placement of the bound Na+ cation, which may indicate that Cr3+ substitution can alter the surface reactivity of Keggin-type species.
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Affiliation(s)
| | - Mohammad Shohel
- University of Iowa, Department of Chemistry, Iowa City, Iowa 52245, USA
| | - Joseph W Bennett
- University of Iowa, Department of Chemistry, Iowa City, Iowa 52245, USA
| | - Jack A Smith
- University of Iowa, Department of Chemistry, Iowa City, Iowa 52245, USA
| | | | - Ethan Hollar
- University of Iowa, Department of Chemistry, Iowa City, Iowa 52245, USA
| | - Tori Z Forbes
- University of Iowa, Department of Chemistry, Iowa City, Iowa 52245, USA
| | - Sara E Mason
- University of Iowa, Department of Chemistry, Iowa City, Iowa 52245, USA
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7
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Tamijani AA, Bjorklund JL, Augustine LJ, Catalano JG, Mason SE. Density Functional Theory and Thermodynamics Modeling of Inner-Sphere Oxyanion Adsorption on the Hydroxylated α-Al 2O 3(001) Surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:13166-13180. [PMID: 32946243 DOI: 10.1021/acs.langmuir.0c01203] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The inner-sphere adsorption of AsO43-, PO43-, and SO42- on the hydroxylated α-Al2O3(001) surface was modeled with the goal of adapting a density functional theory (DFT) and thermodynamics framework for calculating the adsorption energetics. While DFT is a reliable method for predicting various properties of solids, including crystalline materials comprised of hundreds (or even thousands) of atoms, adding aqueous energetics in heterogeneous systems poses steep challenges for modeling. This is in part due to the fact that environmentally relevant variations in the chemical surroundings cannot be captured atomistically without increasing the system size beyond tractable limits. The DFT + thermodynamics approach to this conundrum is to combine the DFT total energies with tabulated solution-phase data and Nernst-based corrective terms to incorporate experimentally tunable parameters such as concentration. Central to this approach is the design of thermodynamic cycles that partition the overall reaction (here, inner-sphere adsorption proceeding via ligand exchange) into elementary steps that can either be fully calculated or for which tabulated data are available. The ultimate goal is to develop a modeling framework that takes into account subtleties of the substrate (such as adsorption-induced surface relaxation) and energies associated with the aqueous environment such that adsorption at mineral-water interfaces can be reliably predicted, allowing for comparisons in the denticity and protonation state of the adsorbing species. Based on the relative amount of experimental information available for AsO43-, PO43-, and SO42- adsorbates and the well-characterized hydroxylated α-Al2O3(001) surface, these systems are chosen to form a basis for assessing the model predictions. We discuss how the DFT + thermodynamics results are in line with the experimental information about the oxyanion sorption behavior. Additionally, a vibrational analysis was conducted for the charge-neutral oxyanion complexes and is compared to the available experimental findings to discern the inner-sphere adsorption phonon modes. The DFT + thermodynamics framework used here is readily extendable to other chemical processes at solid-liquid interfaces, and we discuss future directions for modeling surface processes at mineral-water and environmental interfaces.
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Affiliation(s)
| | - Jennifer L Bjorklund
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52245, United States
| | - Logan J Augustine
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52245, United States
| | - Jeffrey G Catalano
- Department of Earth and Planetary Sciences, Washington University, St. Louis, Missouri 63130, United States
| | - Sara E Mason
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52245, United States
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8
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Shohel M, Bjorklund JL, Ovrom EA, Mason SE, Forbes TZ. Ga 3+ Incorporation into Al 13 Keggin Polyoxometalates and the Formation of δ-(GaAl 12) 7+ and (Ga 2.5Al 28.5) 19+ Polycations. Inorg Chem 2020; 59:10461-10472. [PMID: 32683862 DOI: 10.1021/acs.inorgchem.0c00743] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Keggin-type polyaluminum species (ε-Al13, δ-Al13, Al26, Al30, Al32) can form upon partial hydrolysis of Al3+-bearing solutions and are important species for water purification and contaminant transport. While the structural features for the major Al3+ polyaluminum species have been delineated, much less is known regarding heteroatom substitution and resultant structures other than the previously identified ε-GaAl127+ and ε-GeAl128+ cations. Single-atom substitution within polyaluminum species can change the surface reactivity within water treatment scenarios; thus, it is important to understand heteroatom incorporation within this system. The present work describes the synthesis and characterization of two novel Ga3+-substituted Keggin-type polyaluminum species. Na[GaO4Al12(OH)24(H2O)12](2,6-NDS)4(H2O)20.5 (δ-GaAl12) and [Ga2O8Al28.5Ga0.5(OH)58(H2O)27(SO4)2](SO4)4Cl7(H2O)8.5 (Ga2.5Al28.5) were crystallized from a thermally aged, partially hydrolyzed Ga3+/Al3+ solution. Structural refinement from single-crystal X-ray diffraction indicated fully occupied Ga3+ within tetrahedral site(s) of both isolated species. Partial substitution was observed for octahedral sites for the larger Ga2.5Al28.5 cluster. The chemical compositions of both clusters were confirmed by inductively coupled plasma mass spectrometry (ICP-MS). Density functional theory (DFT) calculations corroborated the structural refinement, with the energetics of Ga3+ substitution suggesting preferential substitution within tetrahedral sites for both species. Additional theoretical work suggests that the rotated trimer in δ-GaAl12 is highly reactive, which can serve as the driving force in the formation of the Ga2.5Al28.5 cluster.
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Affiliation(s)
- Mohammad Shohel
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Jennifer L Bjorklund
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Erik A Ovrom
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Sara E Mason
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Tori Z Forbes
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
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9
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Liu YY, An JD, Wang TT, Li Y, Ding B. Solvo-thermal Preparation and Characterization of Two Cd II
Coordination Polymers Constructed From 2,6-(1,2,4-Triazole-4-yl)pyridine and 5-R-Isophthalic Acid (R = Nitro, Sulfo). Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yuan-Yuan Liu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; MOE Key Laboratory of InorganicOrganic Hybrid Functional Material Chemistry; Tianjin Normal University; 300387 Tianjin P. R. China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education); Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Nankai University; 300071 Tianjin P. R. China
| | - Jun-Dan An
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; MOE Key Laboratory of InorganicOrganic Hybrid Functional Material Chemistry; Tianjin Normal University; 300387 Tianjin P. R. China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education); Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Nankai University; 300071 Tianjin P. R. China
| | - Tian-Tian Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; MOE Key Laboratory of InorganicOrganic Hybrid Functional Material Chemistry; Tianjin Normal University; 300387 Tianjin P. R. China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education); Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Nankai University; 300071 Tianjin P. R. China
| | - Yong Li
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin Normal University; 300387 Tianjin P. R. China
| | - Bin Ding
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; MOE Key Laboratory of InorganicOrganic Hybrid Functional Material Chemistry; Tianjin Normal University; 300387 Tianjin P. R. China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education); Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Nankai University; 300071 Tianjin P. R. China
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10
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Zhao GZ, Li HL, Jia JF, Wu HS, Lu M. Dissociative adsorption modes of TATB on the Al (111) surface: a DFT investigation. RSC Adv 2019; 9:11745-11754. [PMID: 35517013 PMCID: PMC9063387 DOI: 10.1039/c9ra00989b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 04/01/2019] [Indexed: 12/21/2022] Open
Abstract
Herein, the adsorption modes and electronic structures of TATB/Al (111) systems were investigated using the density functional theory (DFT) approach. We found that chemical adsorption led to the decomposition of the TATB molecule on the Al surface by four adsorption modes. All the adsorption configurations were accompanied by fractures of the N-O bonds in the nitro groups. In addition, there was a hydrogen atom transfer for 5P. For parallel and vertical adsorptions, the TATB molecules favored planar or quasi-planar structures. The order of total energy with BSSE correction matches well with the order of adsorption energy. The absolute values of energy and adsorption energy of 6P and 6V are highest in the parallel and vertical adsorption systems, respectively. Electrons are transferred from the Al (111) surface to the TATB molecule; this results in the activation of TATB on the Al (111) surface and obvious augmentation of the PDOS (partial density of states) peaks of the N and O atoms. From the Al (111) surface to the TATB molecule, the transfer of the electrons of 4P (14.00e) and 6V (9.04e) is largest for the parallel and vertical adsorptions, respectively.
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Affiliation(s)
- Guo-Zheng Zhao
- Key Laboratory of Magnetic Molecules, Magnetic Information Materials Ministry of Education, The School of Chemistry and Material Science, Shanxi Normal University Linfen 041004 PR China
| | - Hui-Li Li
- Key Laboratory of Magnetic Molecules, Magnetic Information Materials Ministry of Education, The School of Chemistry and Material Science, Shanxi Normal University Linfen 041004 PR China
| | - Jian-Feng Jia
- Key Laboratory of Magnetic Molecules, Magnetic Information Materials Ministry of Education, The School of Chemistry and Material Science, Shanxi Normal University Linfen 041004 PR China
| | - Hai-Shun Wu
- Key Laboratory of Magnetic Molecules, Magnetic Information Materials Ministry of Education, The School of Chemistry and Material Science, Shanxi Normal University Linfen 041004 PR China
| | - Ming Lu
- School of Chemical Engineering, Nanjing University of Science and Technology Nanjing 210094 China
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11
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Laudadio ED, Bennett JW, Green CM, Mason SE, Hamers RJ. Impact of Phosphate Adsorption on Complex Cobalt Oxide Nanoparticle Dispersibility in Aqueous Media. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:10186-10195. [PMID: 30078331 DOI: 10.1021/acs.est.8b02324] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A commonly overlooked and largely unknown aspect of assessing the environmental and biological safety of engineered nanomaterials is their transformation in aqueous systems. Complex metal oxides are an important class of materials for catalysis, energy storage, and water purification. However, the potential impact of nano complex metal oxides on the environment upon improper disposal is not well understood. We present a comprehensive analysis of the interaction of an environmentally relevant oxyanion, phosphate, with a complex metal oxide nanomaterial, lithium cobalt oxide. Our results show that adsorption of phosphate to the surface of these materials drastically impacts their surface charge, rendering them more stable in aqueous systems. The adsorbed phosphate remains on the surface over significant periods of time, suggesting that desorption is not kinetically favored. The implications of this interaction may be increased dispersibility and bioavailability of these materials in environmental water systems.
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Affiliation(s)
- Elizabeth D Laudadio
- Department of Chemistry , University of Wisconsin , Madison , Wisconsin 53706 , United States
| | - Joseph W Bennett
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242 , United States
| | - Curtis M Green
- Department of Chemistry , University of Wisconsin , Madison , Wisconsin 53706 , United States
| | - Sara E Mason
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242 , United States
| | - Robert J Hamers
- Department of Chemistry , University of Wisconsin , Madison , Wisconsin 53706 , United States
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12
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Burns PC, Nyman M. Captivation with encapsulation: a dozen years of exploring uranyl peroxide capsules. Dalton Trans 2018; 47:5916-5927. [DOI: 10.1039/c7dt04245k] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Uranyl peroxide cages are an extensive family of topologically varied self-assembling nanoscale clusters with fascinating properties and applications.
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Affiliation(s)
- Peter C. Burns
- Department of Civil and Environmental Engineering and Earth Sciences
- University of Notre Dame
- Notre Dame
- USA
- Department of Chemistry and Biochemistry
| | - May Nyman
- Department of Chemistry
- Oregon State University
- Corvallis
- USA
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