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Martinon TLM, Ramakrishnam Raju MV, Pierre VC. Kinetically Inert Macrocyclic Europium(III) Receptors for Phosphate. Inorg Chem 2023. [PMID: 37339454 PMCID: PMC10389169 DOI: 10.1021/acs.inorgchem.2c03833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
The significant role that phosphate plays in environmental water pollution and biomedical conditions such as hyperphosphatemia highlights the need to develop robust receptors that can sequester the anion effectively and selectively from complex aqueous media. Toward that goal, four macrocyclic tris-bidentate 1,2-hydroxypyridonate (HOPO) europium(III) complexes containing either a cyclen, cyclam, TACN, or TACD ligand cap were synthesized and evaluated as phosphate receptors. The solubility of EuIII-TACD-HOPO in water was insufficient for luminescent studies. Whereas EuIII-cyclen-HOPO is eight coordinate with two inner-sphere water molecules, both EuIII-cyclam-HOPO and EuIII-TACN-HOPO are nine coordinate with three inner-sphere water molecules, suggesting that the two coordination states are very close in energy. As observed previously with linear analogues of tripodal HOPO complexes, there is no relationship between the number of inner-sphere water molecules and the affinity of the complex for phosphate. Whereas all three complexes do bind phosphate, EuIII-cyclen-HOPO has the highest affinity for phosphate with the anion displacing both of its inner-sphere water molecules. On the other hand, only one or two of the three inner-sphere water molecules of EuIII-TACN-HOPO and EuIII-cyclam-HOPO are displaced by phosphate, respectively. All three complexes are highly selective for phosphate over other anions, including arsenate. All three complexes are highly stable. EuIII-cyclen-HOPO and, to a lesser extent, EuIII-TACN-HOPO are more kinetically inert than the linear EuIII-Ser-HOPO. EuIII-cyclam-HOPO, on the other hand, is not. This study highlights the significant effect that minor changes in the ligand cap can have on both the ligand exchange rate and affinity for phosphate of tripodal 1,2-dihydroxypyridinonate complexes.
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Affiliation(s)
- Thibaut L M Martinon
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | | | - Valérie C Pierre
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
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2
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Wilharm RK, Ramakrishnam Raju MV, Hoefler JC, Platas-Iglesias C, Pierre VC. Exploiting the Fluxionality of Lanthanide Complexes in the Design of Paramagnetic Fluorine Probes. Inorg Chem 2022; 61:4130-4142. [PMID: 35196450 PMCID: PMC8966431 DOI: 10.1021/acs.inorgchem.1c03908] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Fluorine-19 MRI is increasingly being considered as a tool for biomolecular imaging, but the very poor sensitivity of this technique has limited most applications. Previous studies have long established that increasing the sensitivity of 19F molecular probes requires increasing the number of fluorine nuclei per probe as well as decreasing their longitudinal relaxation time. The latter is easily achieved by positioning the fluorine atoms in close proximity to a paramagnetic metal ion such as a lanthanide(III). Increasing the number of fluorine atoms per molecule, however, is only useful inasmuch as all of the fluorine nuclei are chemically equivalent. Previous attempts to achieve this equivalency have focused on designing highly symmetric and rigid fluorinated macrocyclic ligands. A much simpler approach consists of exploiting highly fluxional lanthanide complexes with open coordination sites that have a high affinity for phosphated and phosphonated species. Computational studies indicate that LnIII-TREN-MAM is highly fluxional, rapidly interconverting between at least six distinct isomers. In neutral water at room temperature, LnIII-TREN-MAM binds two or three equivalents of fluorinated phosphonates. The close proximity of the 19F nuclei to the LnIII center in the ternary complex decreases the relaxation times of the fluorine nuclei up to 40-fold. Advantageously, the fluorophosphonate-bound lanthanide complex is also highly fluxional such that all 19F nuclei are chemically equivalent and display a single 19F signal with a small LIS. Dynamic averaging of fluxional fluorinated supramolecular assemblies thus produces effective 19F MR systems.
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Affiliation(s)
- Randall K Wilharm
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | | | - John C Hoefler
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas and Departamento de Quıímica, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia Spain
| | - Valérie C Pierre
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
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Joaqui-Joaqui MA, Maxwell Z, Raju MVR, Jiang M, Srivastava K, Shao F, Arriaga EA, Pierre VC. Metallointercalators-DNA Tetrahedron Supramolecular Self-Assemblies with Increased Serum Stability. ACS Nano 2022; 16:2928-2941. [PMID: 35133785 PMCID: PMC8926058 DOI: 10.1021/acsnano.1c10084] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Self-assembly of metallointercalators into DNA nanocages is a rapid and facile approach to synthesize discrete bioinorganic host/guest structures with a high load of metal complexes. Turberfield's DNA tetrahedron can accommodate one intercalator for every two base pairs, which corresponds to 48 metallointercalators per DNA tetrahedron. The affinity of the metallointercalator for the DNA tetrahedron is a function of both the structure of the intercalating ligand and the overall charge of the complex, with a trend in affinity [Ru(bpy)2(dppz)]2+ > [Tb-DOTAm-Phen]3+ ≫ Tb-DOTA-Phen. Intercalation of the metal complex stabilizes the DNA tetrahedron, resulting in an increase of its melting temperature and, importantly, a significant increase in its stability in the presence of serum. [Ru(bpy)2(dppz)]2+, which has a greater affinity for DNA than [Tb-DOTAm-Phen]3+, increases the melting point and decreases degradation in serum to a greater extent than the TbIII complex. In the presence of Lipofectamine, the metallointercalator@DNA nanocage assemblies substantially increase the cell uptake of their respective metal complex. Altogether, the facile incorporation of a large number of metal complexes per assembly, the higher stability in serum, and the increased cell penetration of metallointercalator@DNA make these self-assemblies well-suited as metallodrugs.
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Affiliation(s)
- M. Andrey Joaqui-Joaqui
- Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, United States of America
| | - Zoe Maxwell
- Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, United States of America
| | | | - Min Jiang
- Zhejiang University-University of Illinois at Urbana-Champaign Institute, Zhejiang University, Haining, 314400, China
| | - Kriti Srivastava
- Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, United States of America
| | - Fangwei Shao
- Zhejiang University-University of Illinois at Urbana-Champaign Institute, Zhejiang University, Haining, 314400, China
| | - Edgar A. Arriaga
- Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, United States of America
| | - Valérie C. Pierre
- Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, United States of America
- Corresponding Author: Valérie C. Pierre - Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States of America;
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4
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Xie Z, Ramakrishnam Raju MV, Adhihetty PK, Fu XA, Nantz MH. Effect of Thiol Molecular Structure on the Sensitivity of Gold Nanoparticle-Based Chemiresistors toward Carbonyl Compounds. Sensors (Basel) 2020; 20:s20247024. [PMID: 33302491 PMCID: PMC7763667 DOI: 10.3390/s20247024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 12/13/2022]
Abstract
Increasing both the sensitivity and selectivity of thiol-functionalized gold nanoparticle chemiresistors remains a challenging issue in the quest to develop real-time gas sensors. The effects of thiol molecular structure on such sensor properties are not well understood. This study investigates the effects of steric as well as electronic effects in a panel of substituted thiol-urea compounds on the sensing properties of thiolate monolayer-protected gold nanoparticle chemiresistors. Three series of urea-substituted thiols with different peripheral end groups were synthesized for the study and used to prepare gold nanoparticle-based chemiresistors. The responses of the prepared sensors to trace volatile analytes were significantly affected by the urea functional motifs. The largest response for sensing acetone among the three series was observed for the thiol-urea sensor featuring a tert-butyl end group. Furthermore, the ligands fitted with N, N’-dialkyl urea moieties exhibit a much larger response to carbonyl analytes than the more acidic urea series containing N-alkoxy-N’-alkyl urea and N, N’-dialkoxy urea groups with the same peripheral end groups. The results show that the peripheral molecular structure of thiolate-coated gold nanoparticles plays a critical role in sensing target analytes.
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Affiliation(s)
- Zhenzhen Xie
- Department of Chemical Engineering, University of Louisville, Louisville, KY 40208, USA; (Z.X.); (X.-A.F.)
| | | | | | - Xiao-An Fu
- Department of Chemical Engineering, University of Louisville, Louisville, KY 40208, USA; (Z.X.); (X.-A.F.)
| | - Michael H. Nantz
- Department of Chemistry, University of Louisville, Louisville, KY 40208, USA;
- Correspondence:
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Joaqui-Joaqui MA, Pandey MK, Bansal A, Raju MVR, Armstrong-Pavlik F, Dundar A, Wong HL, DeGrado TR, Pierre VC. Catechol-Based Functionalizable Ligands for Gallium-68 Positron Emission Tomography Imaging. Inorg Chem 2020; 59:12025-12038. [DOI: 10.1021/acs.inorgchem.0c00975] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- M. Andrey Joaqui-Joaqui
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Mukesh K. Pandey
- Department of Radiology, Mayo Clinic, Rochester, Minnesota 55905, United States
| | - Aditya Bansal
- Department of Radiology, Mayo Clinic, Rochester, Minnesota 55905, United States
| | | | - Fiona Armstrong-Pavlik
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Ayca Dundar
- Department of Radiology, Mayo Clinic, Rochester, Minnesota 55905, United States
| | - Henry L. Wong
- Department of Medicinal Chemistry and Institute for Therapeutics Discovery & Development, University of Minnesota, Minneapolis, Minnesota 55414, United States
| | - Timothy R. DeGrado
- Department of Radiology, Mayo Clinic, Rochester, Minnesota 55905, United States
| | - Valérie C. Pierre
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
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Ramakrishnam Raju MV, Harris SM, Pierre VC. Design and applications of metal-based molecular receptors and probes for inorganic phosphate. Chem Soc Rev 2020; 49:1090-1108. [PMID: 32016270 DOI: 10.1039/c9cs00543a] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Inorganic phosphate has numerous biomedical functions. Regulated primarily by the kidneys, phosphate reaches abnormally high blood levels in patients with advanced renal diseases. Since phosphate cannot be efficiently removed by dialysis, the resulting hyperphosphatemia leads to increased mortality. Phosphate is also an important component of the environmental chemistry of surface water. Although required to secure our food supply, inorganic phosphate is also linked to eutrophication and the spread of algal blooms with an increasing economic and environmental burden. Key to resolving both of these issues is the development of accurate probes and molecular receptors for inorganic phosphate. Yet, quantifying phosphate in complex aqueous media remains challenging, as is the development of supramolecular receptors that have adequate sensitivity and selectivity for use in either blood or surface waters. Metal-based receptors are particularly well-suited for these applications as they can overcome the high hydration enthalpy of phosphate that limits the effectiveness of many organic receptors in water. Three different strategies are most commonly employed with inorganic receptors for anions: metal extrusion assays, responsive molecular receptors, and indicator displacement assays. In this review, the requirements for molecular receptors and probes for environmental applications are outlined. The different strategies deployed to recognize and sense phosphate with metal ions will be detailed, and their advantages and shortfalls will be delineated with key examples from the literature.
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Affiliation(s)
| | - Sarah M Harris
- Department of Chemistry, Benedictine College, Atchison, KS 66002, USA
| | - Valérie C Pierre
- Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, USA.
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Ramakrishnam Raju MV, Wilharm RK, Dresel MJ, McGreal ME, Mansergh JP, Marting ST, Goodpaster JD, Pierre VC. The Stability of the Complex and the Basicity of the Anion Impact the Selectivity and Affinity of Tripodal Gadolinium Complexes for Anions. Inorg Chem 2019; 58:15189-15201. [DOI: 10.1021/acs.inorgchem.9b02133] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
| | - Randall K. Wilharm
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Mark J. Dresel
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Meghan E. McGreal
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Jarrett P. Mansergh
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Spenser T. Marting
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Jason D. Goodpaster
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Valérie C. Pierre
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
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8
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Xie Z, Ramakrishnam Raju MV, Stewart AC, Nantz MH, Fu XA. Imparting sensitivity and selectivity to a gold nanoparticle chemiresistor through thiol monolayer functionalization for sensing acetone. RSC Adv 2018; 8:35618-35624. [PMID: 30555687 PMCID: PMC6238108 DOI: 10.1039/c8ra06137h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 10/11/2018] [Indexed: 02/06/2023] Open
Abstract
Chemiresistor-based gas sensors for detection of target volatile organic compounds (VOCs) in air face common challenges of poor sensitivity and selectivity as well as suffering from interference by other constituent gases and/or humidity. This work demonstrates that functionalizing gold nanoparticles (AuNPs) with a designed thiol monolayer improves sensitivity and selectivity of the derived AuNPs gas sensor. We report the synthesis and application of a thiol ligand fitted with both a urea motif and a tert-butyl end group for functionalizing AuNPs. The AuNPs sensor prepared using the urea thiol ligand demonstrated significantly increased acetone sensing in comparison with tested commercially available thiol-functionalized AuNPs. The sensor worked under ambient temperature and high humidity conditions, and demonstrated a linear relationship between the sensor response and the common logarithm of analyte concentration.
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Affiliation(s)
- Zhenzhen Xie
- Chemical Engineering Department, University of Louisville, Louisville, Kentucky 40292, USA.
| | | | - Andrew C Stewart
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, USA.
| | - Michael H Nantz
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, USA.
| | - Xiao-An Fu
- Chemical Engineering Department, University of Louisville, Louisville, Kentucky 40292, USA.
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Deng P, Higashi RM, Lane AN, Bruntz RC, Sun RC, Ramakrishnam Raju MV, Nantz MH, Qi Z, Fan TWM. Quantitative profiling of carbonyl metabolites directly in crude biological extracts using chemoselective tagging and nanoESI-FTMS. Analyst 2018; 143:311-322. [PMID: 29192912 DOI: 10.1039/c7an01256j] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The extensive range of chemical structures, wide range of abundances, and chemical instability of metabolites present in the metabolome pose major analytical challenges that are difficult to address with existing technologies. To address these issues, one approach is to target a subset of metabolites that share a functional group, such as ketones and aldehydes, using chemoselective tagging. Here we report a greatly improved chemoselective method for the quantitative analysis of hydrophilic and hydrophobic carbonyl-containing metabolites directly in biological samples. This method is based on direct tissue or cells extraction with simultaneous derivatization of stable and labile carbonylated metabolites using N-[2-(aminooxy)ethyl]-N,N-dimethyl-1-dodecylammonium (QDA) and 13CD3 labeled QDA. We combined innovations of direct quenching of biological sample with frozen derivatization conditions under the catalyst N,N-dimethyl-p-phenylenediamine, which facilitated the formation of oxime stable-isotope ion pairs differing by m/z 4.02188 while minimizing metabolite degradation. The resulting oximes were extracted by HyperSep C8 tips to remove interfering compounds, and the products were detected using nano-electrospray ionization interfaced with a Thermo Fusion mass spectrometer. The quaternary ammonium tagging greatly increased electrospray MS detection sensitivity and the signature ions pairs enabled simple identification of carbonyl compounds. The improved method showed the lower limits of quantification for carbonyl standards to be in the range of 0.20-2 nM, with linearity of R2 > 0.99 over 4 orders of magnitude. We have applied the method to assign 66 carbonyls in mouse tumor tissues, many of which could not be assigned solely by accurate mass and tandem MS. Fourteen of the metabolites were quantified using authentic standards. We also demonstrated the suitability of this method for determining 13C labeled isotopologues of carbonyl metabolites in 13C6-glucose-based stable isotope-resolved metabolomic (SIRM) studies.
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Affiliation(s)
- Pan Deng
- Center for Environmental and Systems Biochemistry, Markey Cancer Center, and Dept. Toxicology & Cancer Biology, University of Kentucky, Lexington, Kentucky 40536-0596, USA.
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10
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Deng P, Higashi RM, Lane AN, Bruntz RC, Sun RC, Raju MVR, Nantz MH, Qi Z, Fan TWM. Correction: Quantitative profiling of carbonyl metabolites directly in crude biological extracts using chemoselective tagging and nanoESI-FTMS. Analyst 2018; 143:999. [PMID: 29359211 DOI: 10.1039/c8an90009d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Correction for 'Quantitative profiling of carbonyl metabolites directly in crude biological extracts using chemoselective tagging and nanoESI-FTMS' by Pan Deng, et al., Analyst, 2018, 143, 311-322.
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Affiliation(s)
- Pan Deng
- Center for Environmental and Systems Biochemistry, Markey Cancer Center, and Dept. Toxicology & Cancer Biology, University of Kentucky, Lexington, Kentucky 40536-0596, USA.
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11
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Ogunwale M, Li M, Ramakrishnam Raju MV, Chen Y, Nantz MH, Conklin DJ, Fu XA. Aldehyde Detection in Electronic Cigarette Aerosols. ACS Omega 2017; 2:1207-1214. [PMID: 28393137 PMCID: PMC5377270 DOI: 10.1021/acsomega.6b00489] [Citation(s) in RCA: 147] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 03/14/2017] [Indexed: 05/23/2023]
Abstract
Acetaldehyde, acrolein, and formaldehyde are the principal toxic aldehydes present in cigarette smoke and contribute to the risk of cardiovascular disease and noncancerous pulmonary disease. The rapid growth of the use of electronic cigarettes (e-cigarettes) has raised concerns over emissions of these harmful aldehydes. This work determines emissions of these aldehydes in both free and bound (aldehyde-hemiacetal) forms and other carbonyls from the use of e-cigarettes. A novel silicon microreactor with a coating phase of 4-(2-aminooxyethyl)-morpholin-4-ium chloride (AMAH) was used to trap carbonyl compounds in the aerosols of e-cigarettes via oximation reactions. AMAH-aldehyde adducts were measured using gas chromatography-mass spectrometry. 1H nuclear magnetic resonance spectroscopy was used to analyze hemiacetals in the aerosols. These aldehydes were detected in the aerosols of all e-cigarettes. Newer-generation e-cigarette devices generated more aldehydes than the first-generation e-cigarettes because of higher battery power output. Formaldehyde-hemiacetal was detected in the aerosols generated from some e-liquids using the newer e-cigarette devices at a battery power output of 11.7 W and above. The emission of these aldehydes from all e-cigarettes, especially higher levels of aldehydes from the newer-generation e-cigarette devices, indicates the risk of using e-cigarettes.
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Affiliation(s)
- Mumiye
A. Ogunwale
- Department
of Chemistry, Department of Chemical Engineering,
and American Heart Association—Tobacco
Regulation and Addiction Center, University
of Louisville, Louisville, Kentucky 40292, United States
| | - Mingxiao Li
- Department
of Chemistry, Department of Chemical Engineering,
and American Heart Association—Tobacco
Regulation and Addiction Center, University
of Louisville, Louisville, Kentucky 40292, United States
| | - Mandapati V. Ramakrishnam Raju
- Department
of Chemistry, Department of Chemical Engineering,
and American Heart Association—Tobacco
Regulation and Addiction Center, University
of Louisville, Louisville, Kentucky 40292, United States
| | - Yizheng Chen
- Department
of Chemistry, Department of Chemical Engineering,
and American Heart Association—Tobacco
Regulation and Addiction Center, University
of Louisville, Louisville, Kentucky 40292, United States
| | - Michael H. Nantz
- Department
of Chemistry, Department of Chemical Engineering,
and American Heart Association—Tobacco
Regulation and Addiction Center, University
of Louisville, Louisville, Kentucky 40292, United States
| | - Daniel J. Conklin
- Department
of Chemistry, Department of Chemical Engineering,
and American Heart Association—Tobacco
Regulation and Addiction Center, University
of Louisville, Louisville, Kentucky 40292, United States
| | - Xiao-An Fu
- Department
of Chemistry, Department of Chemical Engineering,
and American Heart Association—Tobacco
Regulation and Addiction Center, University
of Louisville, Louisville, Kentucky 40292, United States
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O’Toole MG, Soucy PA, Chauhan R, Raju MVR, Patel DN, Nunn BM, Keynton MA, Ehringer WD, Nantz MH, Keynton RS, Gobin AS. Release-Modulated Antioxidant Activity of a Composite Curcumin-Chitosan Polymer. Biomacromolecules 2016; 17:1253-60. [DOI: 10.1021/acs.biomac.5b01019] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Martin G. O’Toole
- Department of Bioengineering and ‡Department of
Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Patricia A. Soucy
- Department of Bioengineering and ‡Department of
Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Rajat Chauhan
- Department of Bioengineering and ‡Department of
Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Mandapati V. Ramakrishnam Raju
- Department of Bioengineering and ‡Department of
Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Dhruvina N. Patel
- Department of Bioengineering and ‡Department of
Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Betty M. Nunn
- Department of Bioengineering and ‡Department of
Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Megan A. Keynton
- Department of Bioengineering and ‡Department of
Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - William D. Ehringer
- Department of Bioengineering and ‡Department of
Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Michael H. Nantz
- Department of Bioengineering and ‡Department of
Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Robert S. Keynton
- Department of Bioengineering and ‡Department of
Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Andrea S. Gobin
- Department of Bioengineering and ‡Department of
Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
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Arumugaperumal R, Srinivasadesikan V, Ramakrishnam Raju MV, Lin MC, Shukla T, Singh R, Lin HC. Acid/Base and H2PO4(-) Controllable High-Contrast Optical Molecular Switches with a Novel BODIPY Functionalized [2]Rotaxane. ACS Appl Mater Interfaces 2015; 7:26491-26503. [PMID: 26548660 DOI: 10.1021/acsami.5b07574] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A novel multifunctional mechanically interlocked switchable [2]rotaxane R4 containing two molecular stations and rotaxane arms terminated with boron-dipyrromethene (BODIPY) fluorophores and its derivatives were synthesized for the first time by CuAAC click reaction. The shuttling motion of macrocycle between the dibenzylammonium and triazolium recognition sites and the distance dependent photoinduced electron transfer process of R4 is demonstrated by utilizing external chemical stimuli (acid/base). Interestingly, the reversible self-assembly process of R4 was recognized by the acid-base molecular switch strategy. Notably, two symmetrical triazolium groups acted as molecular stations, H2PO4(-) receptors, and H-bonded donors. Both [2]rotaxane R4 and thread R2 demonstrated excellent optical responses and high selectivity toward H2PO4(-) ion. The specific motion and guest-host interactions of mechanically interlocked machines (MIMs) were also further explored by quantum mechanical calculations. The thread R2 also demonstrated to enable the detection of H2PO4(-) in RAW 264.7 cells successfully.
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Affiliation(s)
- Reguram Arumugaperumal
- Department of Materials Science and Engineering, National Chiao Tung University , Hsinchu 300, Taiwan
| | - Venkatesan Srinivasadesikan
- Center for Interdisciplinary Molecular Science, Department of Applied Chemistry, National Chiao Tung University , Hsinchu 300, Taiwan
| | | | - Ming-Chang Lin
- Center for Interdisciplinary Molecular Science, Department of Applied Chemistry, National Chiao Tung University , Hsinchu 300, Taiwan
| | - Tarun Shukla
- Department of Materials Science and Engineering, National Chiao Tung University , Hsinchu 300, Taiwan
| | - Ravinder Singh
- Department of Materials Science and Engineering, National Chiao Tung University , Hsinchu 300, Taiwan
| | - Hong-Cheu Lin
- Department of Materials Science and Engineering, National Chiao Tung University , Hsinchu 300, Taiwan
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Lehotkay R, Saraswathi Devi T, Raju MVR, Bada PK, Nuti S, Kempf N, Carminati GG. Factor validity and reliability of the aberrant behavior checklist-community (ABC-C) in an Indian population with intellectual disability. J Intellect Disabil Res 2015; 59:208-214. [PMID: 24612083 DOI: 10.1111/jir.12128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/24/2014] [Indexed: 06/03/2023]
Abstract
BACKGROUND In this study realised in collaboration with the department of psychology and parapsychology of Andhra University, validation of the Aberrant Behavior Checklist-Community (ABC-C) in Telugu, the official language of Andhra Pradesh, one of India's 28 states, was carried out. METHODS To assess the factor validity and reliability of this Telugu version, 120 participants with moderate to profound intellectual disability (94 men and 26 women, mean age 25.2, SD 7.1) were rated by the staff of the Lebenshilfe Institution for Mentally Handicapped in Visakhapatnam, Andhra Pradesh, India. Rating data were analysed with a confirmatory factor analysis. The internal consistency was estimated by Cronbach's alpha. To confirm the test-retest reliability, 50 participants were rated twice with an interval of 4 weeks, and 50 were rated by pairs of raters to assess inter-rater reliability. RESULTS Confirmatory factor analysis revealed that the root mean square error of approximation (RMSEA) was equal to 0.06, the comparative fit index (CFI) was equal to 0.77, and the Tucker Lewis index (TLI) was equal to 0.77, which indicated that the model with five correlated factors had a good fit. Coefficient alpha ranged from 0.85 to 0.92 across the five subscales. Spearman's rank correlation coefficients for inter-rater reliability tests ranged from 0.65 to 0.75, and the correlations for test-retest reliability ranged from 0.58 to 0.76. All reliability coefficients were statistically significant (P < 0.01). CONCLUSION The factor validity and reliability of Telugu version of the ABC-C evidenced factor validity and reliability comparable to the original English version and appears to be useful for assessing behaviour disorders in Indian people with intellectual disabilities.
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Affiliation(s)
- R Lehotkay
- Psychiatric Unit of Mental Development (UPDM), Department of Mental Health and Psychiatry, University Hospitals of Geneva (HUG), University of Geneva, Geneva, Switzerland
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Raju MVR, Lin HC. Correction to Self-Assembly of Tetraphenylethene-Based [2]Catenane Driven by Acid–Base-Controllable Molecular Switching and Its Enabled Aggregation-Induced Emission. Org Lett 2015; 17:1347. [DOI: 10.1021/acs.orglett.5b00260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ramakrishnam Raju MV, Lin HC. Self-Assembly of Tetraphenylethene-Based [2]Catenane Driven by Acid–Base-Controllable Molecular Switching and Its Enabled Aggregation-Induced Emission. Org Lett 2014; 16:5564-7. [DOI: 10.1021/ol5025629] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
| | - Hong-Cheu Lin
- Department of Materials Science
and Engineering, National Chiao Tung University, Hsinchu 30049, Taiwan
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Raju MVR, Raghunath P, Lin MC, Lin HC. An Acid–Base Controllable Hierarchical Nanostructure from a NIR-Absorbing Conjugated Polyrotaxane-Based Optical Molecular Switch. Macromolecules 2013. [DOI: 10.1021/ma401485b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
| | - P. Raghunath
- Center
for Interdisciplinary Molecular Science, Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Ming-Chang Lin
- Center
for Interdisciplinary Molecular Science, Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Hong-Cheu Lin
- Department
of Materials Science and Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
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Affiliation(s)
| | - Hong-Cheu Lin
- Department of Materials Science and Engineering, National Chiao Tung Univeristy, Hsinchu 30049, Taiwan (ROC)
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