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Zhao Y, Gouda M, Yu G, Zhang C, Lin L, Nie P, Huang W, Ye H, Ye Y, Zhou C, He Y. Analyzing cadmium-phytochelatin2 complexes in plant using terahertz and circular dichroism information. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 225:112800. [PMID: 34547661 DOI: 10.1016/j.ecoenv.2021.112800] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/13/2021] [Accepted: 09/15/2021] [Indexed: 06/13/2023]
Abstract
Phytochelatins are plants' small metal-binding peptides which chelate internal heavy metals to form nontoxic complexes. Detecting the complexes in plants would simplify identification of cultivars with both high tolerance and enrichment capabilities for heavy metals which represent phytoextraction performance. Thus, a terahertz spectroscopy combined with density functional theory, chemometrics and circular dichroism was used for characterization of phytochelatin2 (PC2), Cd-PC2 mixture standards, and pak choi (Brassica chinensis) leaves as a plant model. Results showed PC2 chelates Cd2+ in a 2:1 ratio to form Cd(PC2)2 complex; Cd connected to thoils of PC2 and changed β-turn and random coil of PC2 peptide chain to β-Sheet which presented as terahertz vibrations of PC2 around 1.03 and 1.71 THz being suppressed; the best models for detecting the complex in pak choi were obtained by partial least squares regression modeling combined with successive projections algorithm selection; the models used PC2 as a natural probe for visualizing and quantifying chelated Cd in pak choi leaf and achieved a limit of detection up to 1.151 ppm. This study suggested that terahertz information of the heavy metal-PCs complexes is qualified for representing a simpler alternative to classical index for evaluating phytoextraction performance of plant; it provided a general protocol for structure analysis and detection of heavy metal-PCs complexes in plant by terahertz absorbance.
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Affiliation(s)
- Yinglei Zhao
- Institute of Agricultural Equipment, Zhejiang Academy of Agricultural Sciences, 310000 Hangzhou, China; College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310058, China; Key Laboratory of Spectroscopy Sensing, Ministry of Agriculture, Hangzhou 310058, China
| | - Mostafa Gouda
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; Department of Nutrition & Food Science, National Research Centre, Dokki, Giza, Egypt
| | - Guohong Yu
- Institute of Agricultural Equipment, Zhejiang Academy of Agricultural Sciences, 310000 Hangzhou, China
| | - Chenghao Zhang
- Institute of Agricultural Equipment, Zhejiang Academy of Agricultural Sciences, 310000 Hangzhou, China
| | - Lei Lin
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Pengcheng Nie
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310058, China; Key Laboratory of Spectroscopy Sensing, Ministry of Agriculture, Hangzhou 310058, China
| | - Wei Huang
- Institute of Agricultural Equipment, Zhejiang Academy of Agricultural Sciences, 310000 Hangzhou, China
| | - Hongbao Ye
- Institute of Agricultural Equipment, Zhejiang Academy of Agricultural Sciences, 310000 Hangzhou, China
| | - Yunxiang Ye
- Institute of Agricultural Equipment, Zhejiang Academy of Agricultural Sciences, 310000 Hangzhou, China
| | - Chengquan Zhou
- Institute of Agricultural Equipment, Zhejiang Academy of Agricultural Sciences, 310000 Hangzhou, China
| | - Yong He
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310058, China; Key Laboratory of Spectroscopy Sensing, Ministry of Agriculture, Hangzhou 310058, China.
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2
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Bian Y, Zhang X, Zhu Z, Yang B. Vibrational modes optimization and terahertz time-domain spectroscopy of -Lysine and -Lysine hydrate. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.129952] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Capobianco MD, Pattengale B, Neu J, Schmuttenmaer CA. Single Copper Atoms Enhance Photoconductivity in g-C 3N 4. J Phys Chem Lett 2020; 11:8873-8879. [PMID: 33017538 DOI: 10.1021/acs.jpclett.0c02756] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Graphitic carbon nitride (g-C3N4) and its doped analogues have been studied over the past decade in part due to their promising applications in heterogeneous photocatalysis; however, the effect of doping on the photoconductivity is poorly understood. Herein, we investigate Cu doped g-C3N4 (Cu-g-C3N4) and demonstrate via extended X-ray absorption fine structure that Cu+ incorporates as an individual ion. Time-resolved optical pump terahertz probe spectroscopy was utilized to measure the ultrafast photoconductivity in response to a 400 nm pump pulse and showed that the Cu+ dopant significantly enhances photoconductivity of the as-prepared powdered sample, which decays within 10 ps. Furthermore, a film preparation technique was applied that further enhanced the photoconductivity and induced a longer-lived photoconductive state with a lifetime on the order of 100 ps. This study provides valuable insight into the ultrafast photoconductivity dynamics of g-C3N4 materials, which is essential toward developing efficient g-C3N4 photocatalysts.
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Affiliation(s)
- Matt D Capobianco
- Department of Chemistry and Yale Energy Sciences Institute, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Brian Pattengale
- Department of Chemistry and Yale Energy Sciences Institute, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Jens Neu
- Department of Molecular Biophysics and Biochemistry and Yale Microbial Sciences Institute, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Charles A Schmuttenmaer
- Department of Chemistry and Yale Energy Sciences Institute, Yale University, New Haven, Connecticut 06520-8107, United States
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Hyldgaard P, Jiao Y, Shukla V. Screening nature of the van der Waals density functional method: a review and analysis of the many-body physics foundation. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:393001. [PMID: 32213670 DOI: 10.1088/1361-648x/ab8250] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 03/23/2020] [Indexed: 05/03/2023]
Abstract
We review the screening nature and many-body physics foundation of the van der Waals density functional (vdW-DF) method [Berland Ket al2015Rep. Prog. Phys.78066501], a systematic approach to construct truly nonlocal exchange-correlation energy density functionals. To that end we define and focus on a class of consistent vdW-DF versions that adhere to the Lindhard screening logic of the full method formulation. The consistent-exchange vdW-DF-cx version [Berland K and Hyldgaard P 2014Phys. Rev. B89035412] and its spin extension [Thonhauser Tet al2015Phys. Rev. Lett.115136402] represent the first examples of this class; in general, consistent vdW-DFs reflect a concerted expansion of a formal recast of the adiabatic-connection formula [Hyldgaard Pet al2014Phys. Rev. B90075148], an exponential summation of contributions to the local-field response, and the Dyson equation. We argue that the screening emphasis is essential because the exchange-correlation energy reflects an effective electrodynamics set by a long-range interaction. Two consequences are that (1) there are, in principle, no wiggle room in how one balances exchange and correlation, for example, in vdW-DF-cx, and that (2) consistent vdW-DFs have a formal structure that allows them to incorporate vertex-correction effects, at least in the case of levels that experience recoil-less interactions (for example, near the Fermi surface). We explore the extent to which the strictly nonempirical vdW-DF-cx formulation can serve as a systematic extension of the constraint-based semilocal functionals. For validation, we provide a complete survey of vdW-DF-cx performance for broad molecular processes, for the full set of 55 benchmarks in GMTKN55 [Goerigk Let al2017Phys. Chem. Chem. Phys.1932184] and comparing to the quantum-chemistry calculations that are summarized in that paper. We also provide new vdW-DF-cx results for metal surface energies and work functions that we compare to experiment. Finally, we use the screening insight to separate the vdW-DF nonlocal-correlation term into pure-vdW-interaction and local-field-susceptibility effects and present tools to compute and map the binding signatures.
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Affiliation(s)
- Per Hyldgaard
- Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, SE-41296 Gothenburg, Sweden
| | - Yang Jiao
- Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, SE-41296 Gothenburg, Sweden
| | - Vivekanand Shukla
- Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, SE-41296 Gothenburg, Sweden
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Spies JA, Hilibrand MJ, Neu J, Ostresh S, Swierk JR, Schmuttenmaer CA. Suspensions of Semiconducting Nanoparticles in Nafion for Transient Spectroscopy and Terahertz Photoconductivity Measurements. Anal Chem 2020; 92:4187-4192. [DOI: 10.1021/acs.analchem.9b05723] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Jacob A. Spies
- Department of Chemistry and Energy Sciences Institute, Yale University, New Haven, Connecticut 06520, United States
| | - Miryl J. Hilibrand
- Department of Chemistry and Energy Sciences Institute, Yale University, New Haven, Connecticut 06520, United States
| | - Jens Neu
- Department of Molecular Biophysics and Biochemistry and Microbial Sciences Institute, Yale University, New Haven, Connecticut 06520, United States
| | - Sarah Ostresh
- Department of Chemistry and Energy Sciences Institute, Yale University, New Haven, Connecticut 06520, United States
| | - John R. Swierk
- Department of Chemistry and Energy Sciences Institute, Yale University, New Haven, Connecticut 06520, United States
| | - Charles A. Schmuttenmaer
- Department of Chemistry and Energy Sciences Institute, Yale University, New Haven, Connecticut 06520, United States
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Pattengale B, Neu J, Ostresh S, Hu G, Spies JA, Okabe R, Brudvig GW, Schmuttenmaer CA. Metal-Organic Framework Photoconductivity via Time-Resolved Terahertz Spectroscopy. J Am Chem Soc 2019; 141:9793-9797. [PMID: 31179698 DOI: 10.1021/jacs.9b04338] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
While metal-organic frameworks (MOFs) have been under thorough investigation over the past two decades, photoconductive MOFs are an emerging class of materials with promising applications in light harvesting and photocatalysis. To date, there is not a general method to investigate the photoconductivity of polycrystalline MOF samples as-prepared. Herein, we utilize time-resolved terahertz spectroscopy along with a new sample preparation method to determine the photoconductivity of Zn2TTFTB, an archetypical conductive MOF, in a noncontact manner. Using this technique, we were able to gain insight into MOF photoconductivity dynamics with subpicosecond resolution, revealing two distinct carrier lifetimes of 0.6 and 31 ps and a long-lived component of several ns. Additionally, we determined the frequency dependent photoconductivity of Zn2TTFTB which was shown to follow Drude-Smith behavior. Such insights are crucially important with regard to developing the next generation of functional photoconductive MOF materials.
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Affiliation(s)
- Brian Pattengale
- Department of Chemistry and Yale Energy Sciences Institute , Yale University , New Haven , Connecticut 06520-8107 , United States
| | - Jens Neu
- Department of Molecular Biophysics and Biochemistry and Yale Microbial Sciences Institute , Yale University , New Haven , Connecticut 06520-8107 , United States
| | - Sarah Ostresh
- Department of Chemistry and Yale Energy Sciences Institute , Yale University , New Haven , Connecticut 06520-8107 , United States
| | - Gongfang Hu
- Department of Chemistry and Yale Energy Sciences Institute , Yale University , New Haven , Connecticut 06520-8107 , United States
| | - Jacob A Spies
- Department of Chemistry and Yale Energy Sciences Institute , Yale University , New Haven , Connecticut 06520-8107 , United States
| | - Ryotaro Okabe
- Department of Chemistry and Yale Energy Sciences Institute , Yale University , New Haven , Connecticut 06520-8107 , United States
| | - Gary W Brudvig
- Department of Chemistry and Yale Energy Sciences Institute , Yale University , New Haven , Connecticut 06520-8107 , United States
| | - Charles A Schmuttenmaer
- Department of Chemistry and Yale Energy Sciences Institute , Yale University , New Haven , Connecticut 06520-8107 , United States
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Zhang F, Wang HW, Tominaga K, Hayashi M, Sasaki T. Terahertz Fingerprints of Short-Range Correlations of Disordered Atoms in Diflunisal. J Phys Chem A 2019; 123:4555-4564. [PMID: 31038953 DOI: 10.1021/acs.jpca.9b00580] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This work proposes a terahertz (THz) spectroscopy approach to the investigation of one of the outstanding problems in crystallography-the structure analysis of a crystal with disorder. Form I of diflunisal, in which the two ortho sites on one phenyl ring of diflunisal show occupational disorder, was used for an illustration. THz radiation interacts with the collective vibrations of correlated disorder, thus providing a promising tool to examine the symmetry of short-range correlations of disordered atoms. Through a thorough examination of the selection rule of THz vibrations in which the disordered atoms are involved to different extents, we deduced that only four short-range correlation possibilities of disorder exist and all of them display unambiguous fingerprint peaks in the 50-170 cm-1 frequency region. We finally proposed an alternating packing model in which the correlation lengths of disorder are on the nanometer scale.
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Affiliation(s)
- Feng Zhang
- Molecular Photoscience Research Center , Kobe University , Nada, Kobe 657-0013 , Japan
| | - Houng-Wei Wang
- Center for Condensed Matter Sciences , National Taiwan University , 1 Roosevelt Rd., Sec. 4 , Taipei 10617 , Taiwan
| | - Keisuke Tominaga
- Molecular Photoscience Research Center , Kobe University , Nada, Kobe 657-0013 , Japan
| | - Michitoshi Hayashi
- Center for Condensed Matter Sciences , National Taiwan University , 1 Roosevelt Rd., Sec. 4 , Taipei 10617 , Taiwan
| | - Tetsuo Sasaki
- Research Institute of Electronics , Shizuoka University , Hamamatsu , Shizuoka 432-8011 , Japan
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Neu J, Stone EA, Spies JA, Storch G, Hatano AS, Mercado BQ, Miller SJ, Schmuttenmaer CA. Terahertz Spectroscopy of Tetrameric Peptides. J Phys Chem Lett 2019; 10:2624-2628. [PMID: 31039310 PMCID: PMC6936601 DOI: 10.1021/acs.jpclett.9b01091] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Determining the sequence and structure of peptides is crucial for understanding their structure-property relationships. Among many techniques, structures are typically elucidated using nuclear magnetic resonance spectroscopy and single crystal X-ray diffraction measurements. In this study, we present terahertz time-domain spectroscopy (THz-TDS) as a complementary, nondestructive technique that is sensitive to both the primary and secondary structures of tetrapeptides. Using only a few milligrams of peptide, THz-TDS spectra have been measured, some of which have been supported by density functional theory (DFT) calculations, to distinguish six tetrameric peptides with similar primary and secondary structures.
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Affiliation(s)
- Jens Neu
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Elizabeth A. Stone
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Jacob A. Spies
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
- Energy Sciences Institute, Yale University, West Haven, Connecticut 06516, United States
| | - Golo Storch
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Ayaka S. Hatano
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Brandon Q. Mercado
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Scott J. Miller
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Charles A. Schmuttenmaer
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
- Energy Sciences Institute, Yale University, West Haven, Connecticut 06516, United States
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Bennett JW, Raglione ME, Oburn SM, MacGillivray LR, Arnold MA, Mason SE. DFT Computed Dielectric Response and THz Spectra of Organic Co-Crystals and Their Constituent Components. Molecules 2019; 24:molecules24050959. [PMID: 30857228 PMCID: PMC6429106 DOI: 10.3390/molecules24050959] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 02/26/2019] [Accepted: 03/04/2019] [Indexed: 11/26/2022] Open
Abstract
Terahertz (THz) spectroscopy has been put forth as a non-contact, analytical probe to characterize the intermolecular interactions of biologically active molecules, specifically as a way to understand, better develop, and use active pharmaceutical ingredients. An obstacle towards fully utilizing this technique as a probe is the need to couple features in the THz regions to specific vibrational modes and interactions. One solution is to use density functional theory (DFT) methods to assign specific vibrational modes to signals in the THz region, coupling atomistic insights to spectral features. Here, we use open source planewave DFT packages that employ ultrasoft pseudopotentials to assess the infrared (IR) response of organic compounds and complex co-crystal formulations in the solid state, with and without dispersion corrections. We compare our DFT computed lattice parameters and vibrational modes to experiment and comment on how to improve the agreement between theory and modeling to allow for THz spectroscopy to be used as an analytical probe in complex biologically relevant systems.
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Affiliation(s)
- Joseph W Bennett
- Department of Chemistry, University of Iowa, Iowa City, IA 52242, USA.
| | | | - Shalisa M Oburn
- Department of Chemistry, University of Iowa, Iowa City, IA 52242, USA.
| | | | - Mark A Arnold
- 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.
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Neu J, Nikonow H, Schmuttenmaer CA. Terahertz Spectroscopy and Density Functional Theory Calculations of dl-Norleucine and dl-Methionine. J Phys Chem A 2018; 122:5978-5982. [DOI: 10.1021/acs.jpca.8b04978] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jens Neu
- Yale University, Department of Chemistry, New Haven, Connecticut 06520, United States
| | - Heinrich Nikonow
- Yale University, Department of Chemistry, New Haven, Connecticut 06520, United States
| | - Charles A. Schmuttenmaer
- Yale University, Department of Chemistry, New Haven, Connecticut 06520, United States
- Yale University, Energy Science Institute (ESI), New Haven, Connecticut 06520, United States
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