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Miura D, Sekine Y, Nankawa T, Sugita T, Oba Y, Hiroi K, Ohzawa T. Microscopic structural changes during the freeze cross-linking reaction in carboxymethyl cellulose nanofiber hydrogels. CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS 2022. [DOI: 10.1016/j.carpta.2022.100251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Frenkel-Pinter M, Bouza M, Fernández FM, Leman LJ, Williams LD, Hud NV, Guzman-Martinez A. Thioesters provide a plausible prebiotic path to proto-peptides. Nat Commun 2022; 13:2569. [PMID: 35562173 PMCID: PMC9095695 DOI: 10.1038/s41467-022-30191-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 04/19/2022] [Indexed: 11/15/2022] Open
Abstract
It is widely assumed that the condensation of building blocks into oligomers and polymers was important in the origins of life. High activation energies, unfavorable thermodynamics and side reactions are bottlenecks for abiotic peptide formation. All abiotic reactions reported thus far for peptide bond formation via thioester intermediates have relied on high energy molecules, which usually suffer from short half-life in aqueous conditions and therefore require constant replenishment. Here we report plausible prebiotic reactions of mercaptoacids with amino acids that result in the formation of thiodepsipeptides, which contain both peptide and thioester bonds. Thiodepsipeptide formation was achieved under a wide range of pH and temperature by simply drying and heating mercaptoacids with amino acids. Our results offer a robust one-pot prebiotically-plausible pathway for proto-peptide formation. These results support the hypothesis that thiodepsipeptides and thiol-terminated peptides formed readily on prebiotic Earth and were possible contributors to early chemical evolution. One of the early processes enabling the origins of life is thought to be the condensation of building blocks into oligomers and polymers. In this article, the authors report the synthesis of thiodepsipeptides and HS-peptides under mild temperatures and various pH, suggesting they could have formed on early prebiotic Earth.
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Affiliation(s)
- Moran Frenkel-Pinter
- NSF-NASA Center for Chemical Evolution, Georgia Institute of Technology, Atlanta, GA, 30332, USA.,School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA.,Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Marcos Bouza
- NSF-NASA Center for Chemical Evolution, Georgia Institute of Technology, Atlanta, GA, 30332, USA.,School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Facundo M Fernández
- NSF-NASA Center for Chemical Evolution, Georgia Institute of Technology, Atlanta, GA, 30332, USA.,School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Luke J Leman
- NSF-NASA Center for Chemical Evolution, Georgia Institute of Technology, Atlanta, GA, 30332, USA.,Department of Chemistry, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Loren Dean Williams
- NSF-NASA Center for Chemical Evolution, Georgia Institute of Technology, Atlanta, GA, 30332, USA.,School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Nicholas V Hud
- NSF-NASA Center for Chemical Evolution, Georgia Institute of Technology, Atlanta, GA, 30332, USA. .,School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
| | - Aikomari Guzman-Martinez
- NSF-NASA Center for Chemical Evolution, Georgia Institute of Technology, Atlanta, GA, 30332, USA. .,Department of Chemistry, University of Puerto Rico, Mayagüez, Mayagüez, PR, 00681, USA.
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Biocompatible Osmium Telluride-Polypyrrole Nanocomposite Material: Application in Prostate Specific Antigen Immunosensing. Processes (Basel) 2021. [DOI: 10.3390/pr9122203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Prostate cancer is a dominant global threat to society. It affects nearly 4000 men in South Africa annually, making it the second most threatening cancerous disease after lung cancer. A potential serological biomarker to monitor early diagnosis of prostate cancer is prostate specific antigen (PSA). We used the PSA biomarker in our work to develop an extremely sensitive electrochemical immunosensor to achieve low detection limits. The fabrication steps followed with the combination of thioglycolic acid capped osmium telluride quantum dots (TGA-OsTe2QD)-polypyrrole (PPy) nanocomposite and prostate specific antigen modified on a glassy carbon electrode. The UV-Vis signatures of TGA-OsTe2QD-PPy showed an absorption band at 262 nm which is attributed to the PPy and TGA-OsTe2QD composite. This band corresponds to the energy band gap of 4.4 and 5.4 eV. The CV responses of BSA|Ab|TGA-OsTe2QD|PPy|GCE modified electrode to prostate specific antigen (PSA) was studied within a range of 0–16 ng/mL PSA that was linear, herein referred to as liner range (LR), which produced a limit of detection (LOD) value of 0.36 ng/mL PSA. The values of the immunosensor’s calibration parameters (LR and LOD) make them suitable for real sample application, due to their coverage of the PSA concentration range (0–14 ng/mL) that is of clinical importance.
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Nazeef M, Shivhare KN, Ali S, Ansari S, Siddiqui IR. Visible-light-mediated one-pot efficient synthesis of 1-aryl-1H,3H-thiazolo[3,4-a]benzimidazoles: a metal-free photochemical approach in aqueous ethanol. Mol Divers 2021; 25:2479-2486. [PMID: 32980996 DOI: 10.1007/s11030-020-10145-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 09/16/2020] [Indexed: 01/10/2023]
Abstract
A new metal-free approach to construct medicinally valuable 1-aryl-1H,3H-thiazolo[3,4-a]benzimidazoles under visible light irradiation in aqueous ethanol medium at room temperature has been developed. The present process was performed with 1,2-phenylenediamines, aromatic aldehydes and 2-mercaptoacetic acid utilizing a simple household 22 W compact fluorescent lamp to generate C-S, C-N bonds through radical intermediates. This visible-light-promoted synthesis provides lower cost, operation simplicity and high functional groups tolerating ability with short reaction time and high yield under mild reaction conditions.
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Affiliation(s)
- Mohd Nazeef
- Laboratory of Green Synthesis, Department of Chemistry, University of Allahabad, Allahabad, 211002, India
| | - Km Neha Shivhare
- Laboratory of Green Synthesis, Department of Chemistry, University of Allahabad, Allahabad, 211002, India
| | - Shabir Ali
- Department of Chemistry, Aligarh Muslim University, Aligarh, 202002, India
| | - Saif Ansari
- Laboratory of Green Synthesis, Department of Chemistry, University of Allahabad, Allahabad, 211002, India
| | - I R Siddiqui
- Laboratory of Green Synthesis, Department of Chemistry, University of Allahabad, Allahabad, 211002, India.
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Flores-Pacheco A, Sánchez-Zeferino R, Saavedra-Rodríguez G, Contreras-Rascón JI, Díaz-Reyes J, Álvarez-Ramos ME. Enhanced Stokes-shift and dispersibility in non-polar PMMA solvent of CdTe quantum dots by silica coating. Chem Phys 2021. [DOI: 10.1016/j.chemphys.2021.111102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Nazeef M, Shivhare KN, Ali S, Ansari K, Ansari MD, Tiwari SK, Yadav V, Siddiqui I. Visible-light-promoted C N and C S bonds formation: A catalyst and solvent-free photochemical approach for the synthesis of 1,3-thiazolidin-4-ones. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112347] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Kondratenko T, Ovchinnikov O, Grevtseva I, Smirnov M, Erina O, Khokhlov V, Darinsky B, Tatianina E. Thioglycolic Acid FTIR Spectra on Ag 2S Quantum Dots Interfaces. MATERIALS 2020; 13:ma13040909. [PMID: 32085555 PMCID: PMC7079617 DOI: 10.3390/ma13040909] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 01/29/2020] [Accepted: 02/09/2020] [Indexed: 12/16/2022]
Abstract
The mechanism features of colloidal quantum dots (QDs) passivation with thioglycolic acid molecules (TGA) for cases of different luminescent properties is considered using FTIR. This problem is considered based on FTIR spectra analysis for various ionic forms of TGA. Experimental TGA molecules FTIR spectra is interpreted, basing on the data on modeling of TGA vibrational modes, realized in the framework of density functional method (DFT /B3LYP/6-31+G(d)) taking into account the vibrations anharmonicity of every functional group. This approach provides a significant improvement in the agreement between the experimental and calculated data. FTIR spectra of Ag2S/TGA QDs with exciton and recombination luminescence are differ from each other and B “freeB” TGA molecules. The ν(S−H) TGA peak (2559 cm−1) disappears in FTIR spectra of Ag2S/TGA QD samples. This fact indicates the interactions between TGA thiol group and dangling bonds of Ag2S nanocrystals. Ag2S QDs passivation with TGA molecules leads to emergence νas(COO−) (1584 cm−1) and νs(COO−) (1387 cm−1) peaks. It indicates TGA adsorption in ionic form. For Ag2S/TGA QDs with exciton luminescence we observed (a) significant low-frequency shift of νs(COO−) peak from 1388 cm−1 to 1359 cm−1 and high-frequency shift of νas(COO−) peak from 1567 cm−1 to 1581 cm−1; (b) change in the ratio of intensities of νas(COO−) and νs(COO−) vibrations. This feature is caused by the change in the symmetry of TGA molecules due to passivation of Ag2S quantum dots.For Ag2S/TGA QDs with recombination luminescence, the insignificant high-frequency shift of 7–10 cm−1 for νas (COO−) at 1567 cm−1 and low-frequency shift of 3–5 cm−1 for νs (COO−) at 1388 cm−1, probably caused by the interaction of thiol with Ag2S surface is observed. Using FTIR spectra, it was found that IR luminescence photodegradation is also accompanied by changes in the thioglycolic acid molecules, which capped Ag2S QDs. In the case of Ag2S QDs with exciton luminescence, the degradation process is non-reversible. It is accompanied by TGA photodegradation with the formation of α-thiol-substituted acyl radical (S-CH2-CO•) TGA.
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Affiliation(s)
- Tamara Kondratenko
- Department of Optics and Spectroscopy, Voronezh State University, 394018 Voronezh, Russia; (O.O.); (I.G.); (M.S.)
- Correspondence: ; Tel.: +7-(473)-220-87-80
| | - Oleg Ovchinnikov
- Department of Optics and Spectroscopy, Voronezh State University, 394018 Voronezh, Russia; (O.O.); (I.G.); (M.S.)
| | - Irina Grevtseva
- Department of Optics and Spectroscopy, Voronezh State University, 394018 Voronezh, Russia; (O.O.); (I.G.); (M.S.)
| | - Mikhail Smirnov
- Department of Optics and Spectroscopy, Voronezh State University, 394018 Voronezh, Russia; (O.O.); (I.G.); (M.S.)
- Federal State Budget Educational Institution of Higher Education “Voronezh State University of Engineering Technologies”, 3394036 Voronezh, Russia
| | - Oksana Erina
- Department of Analytical Chemistry, Voronezh State University, 394018 Voronezh, Russia; (O.E.); (V.K.); (B.D.)
| | - Vladimir Khokhlov
- Department of Analytical Chemistry, Voronezh State University, 394018 Voronezh, Russia; (O.E.); (V.K.); (B.D.)
| | - Boris Darinsky
- Department of Analytical Chemistry, Voronezh State University, 394018 Voronezh, Russia; (O.E.); (V.K.); (B.D.)
| | - Elena Tatianina
- Department of Physics, Voronezh State Technical University, 394006 Voronezh, Russia;
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Bibikova O, Haas J, López-Lorente ÁI, Popov A, Kinnunen M, Ryabchikov Y, Kabashin A, Meglinski I, Mizaikoff B. Surface enhanced infrared absorption spectroscopy based on gold nanostars and spherical nanoparticles. Anal Chim Acta 2017; 990:141-149. [PMID: 29029737 DOI: 10.1016/j.aca.2017.07.045] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 07/24/2017] [Accepted: 07/24/2017] [Indexed: 01/25/2023]
Abstract
Plasmonic anisotropic nanoparticles possess a number of hot spots on their surface due to the presence of sharp edges, tips or vertices, leading to a high electric field strength surrounding the nanostructures. In this paper, we explore different plasmonic nanostructures, including anisotropic gold nanostars (AuNSts) and spherical gold nanoparticles, in surface-enhanced infrared absorption spectroscopy (SEIRAS) in an attenuated total reflection (ATR) configuration. In our experiments, we observed up to 10-times enhancement of the infrared (IR) absorption of thioglycolic acid (TGA) and up to 2-times enhancement of signals for bovine serum albumin (BSA) protein on plasmonic nanostructure-based films deposited on a silicon (Si) internal reflection element (IRE) compared to bare Si IRE. The dependence of the observed enhancement on the amount of AuNSts present at the surface of the IRE has been demonstrated. Quantitative studies with both, TGA and BSA were performed, observing that the SEIRA signal can be correlated to the concentration of analyte molecules present within the evanescent field. The calibration curves in the presence of the AuNSts showed enhanced sensitivity as compared with the bare Si IRE. We finally compare efficiencies of anisotropic AuNSts and spherical citrate-capped and "bare" laser-synthesized gold nanoparticles as SEIRAS substrates for the detection of TGA and BSA. The signal obtained from AuNSts was at least 2 times higher for TGA molecules in comparison with spherical gold nanoparticles, which was explained by a more efficient generation of hot spots on anisotropic surface due to the presence of sharp edges, tips or vertices, leading to a high electric field strength surrounding the AuNSts.
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Affiliation(s)
- Olga Bibikova
- Optoelectronics and Measurement Techniques Research Unit, University of Oulu, 90014 Oulu, Finland; Institute of Analytical and Bioanalytical Chemistry, Ulm University, 89081 Ulm, Germany; Art Photonics GmbH, 12489 Berlin, Germany; Research-Educational Institute of Optics and Biophotonics, Saratov National Research State University, 410012 Saratov, Russia
| | - Julian Haas
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, 89081 Ulm, Germany
| | | | - Alexey Popov
- Optoelectronics and Measurement Techniques Research Unit, University of Oulu, 90014 Oulu, Finland; ITMO University, 197101 St Petersburg, Russia; Interdisciplinary Laboratory of Biophotonics, Tomsk National Research State University, 634050 Tomsk, Russia
| | - Matti Kinnunen
- Optoelectronics and Measurement Techniques Research Unit, University of Oulu, 90014 Oulu, Finland
| | - Yury Ryabchikov
- Aix-Marseille University, CNRS, UMR 7341 CNRS, LP3, Campus de Luminy, Case 917, F-13288 Marseille Cedex 9, France; P.N. Lebedev Physical Institute of Russian Academy of Sciences, 199 991 Moscow, Russia
| | - Andrei Kabashin
- Aix-Marseille University, CNRS, UMR 7341 CNRS, LP3, Campus de Luminy, Case 917, F-13288 Marseille Cedex 9, France; National Research Nuclear University "MEPhI", Institute of Engineering Physics for Biomedicine (PhysBio), Bio-Nanophotonics Lab., 115409 Moscow, Russia
| | - Igor Meglinski
- Optoelectronics and Measurement Techniques Research Unit, University of Oulu, 90014 Oulu, Finland; ITMO University, 197101 St Petersburg, Russia; Interdisciplinary Laboratory of Biophotonics, Tomsk National Research State University, 634050 Tomsk, Russia
| | - Boris Mizaikoff
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, 89081 Ulm, Germany.
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Baek J, Joung JF, Lee S, Rhee H, Kim MH, Park S, Yoon J. Origin of the Reversible Thermochromic Properties of Polydiacetylenes Revealed by Ultrafast Spectroscopy. J Phys Chem Lett 2016; 7:259-265. [PMID: 26719954 DOI: 10.1021/acs.jpclett.5b02671] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Polydiacetylenes (PDAs) with thermochromic properties undergo colorimetric transitions when the external temperature is varied. This capability has the potential to enable these materials to be used as temperature sensors. These thermochromic properties of PDAs stem from their temperature-dependent optical properties. In this work, we studied the temperature-dependent optical properties of Bis-PDA-Ph, which exhibits reversible thermochromic properties, and PCDA-PDA, which exhibits irreversible thermochromic properties, by UV-visible absorption and femtosecond transient absorption spectroscopy. Our results indicate that the electronic relaxation of PDAs occurs via an intermediate state in cases where the material exhibits reversible thermochromic properties, whereas the excited PDAs relax directly back to the ground state when irreversible thermochromic properties are observed. The existence of this intermediate state in the electronic relaxation of PDAs thus plays an important role in determining their thermochromic properties. These results are very important for both understanding and strategically modulating the thermochromic properties of PDAs.
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Affiliation(s)
- Junwoo Baek
- Department of Chemistry, Korea University , Seoul 136-701, Korea
| | | | - Songyi Lee
- Department of Chemistry and Nano Science, Ewha Womans University , Seoul, 120-750, Korea
| | - Hanju Rhee
- Space-Time Resolved Molecular Imaging Research Team, Korea Basic Science Institute , Seoul 136-713, Korea
| | - Myung Hwa Kim
- Department of Chemistry and Nano Science, Ewha Womans University , Seoul, 120-750, Korea
| | - Sungnam Park
- Department of Chemistry, Korea University , Seoul 136-701, Korea
| | - Juyoung Yoon
- Department of Chemistry and Nano Science, Ewha Womans University , Seoul, 120-750, Korea
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Determination of thioglycolic acid in cosmetics by capillary electrophoresis. J Pharm Biomed Anal 2014; 88:509-12. [DOI: 10.1016/j.jpba.2013.10.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Revised: 09/30/2013] [Accepted: 10/02/2013] [Indexed: 11/21/2022]
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11
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Leubner S, Hatami S, Esendemir N, Lorenz T, Joswig JO, Lesnyak V, Recknagel S, Gaponik N, Resch-Genger U, Eychmüller A. Experimental and theoretical investigations of the ligand structure of water-soluble CdTe nanocrystals. Dalton Trans 2013; 42:12733-40. [DOI: 10.1039/c3dt50802a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Dowgiallo AM, Knappenberger KL. Influence of Confined Fluids on Nanoparticle-to-Surroundings Energy Transfer. J Am Chem Soc 2012; 134:19393-400. [DOI: 10.1021/ja306644p] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Anne-Marie Dowgiallo
- Department
of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4309,
United States
| | - Kenneth L. Knappenberger
- Department
of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4309,
United States
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Green TD, Knappenberger KL. Relaxation dynamics of Au25L18 nanoclusters studied by femtosecond time-resolved near infrared transient absorption spectroscopy. NANOSCALE 2012; 4:4111-4118. [PMID: 22710500 DOI: 10.1039/c2nr31080e] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The relaxation dynamics of electronically excited [Au(25)(SR)(18)](q), where q = 0 or -1 and SR = S(CH(2))(2)Ph, were studied using femtosecond time-resolved transient absorption spectroscopy. Nanoclusters excited by 400 nm light were probed using temporally delayed broad-bandwidth continuum probe pulses. Continuum pulses were generated in both the visible and near infrared (NIR) spectral regions, providing access to a wide range of transient spectral features. The use of NIR probe pulses allowed the relaxation dynamics of the excited states located near the HOMO-LUMO energy gap to be monitored in the probe step via the sp ← LUMO and sp ← LUMO+1 transitions. These NIR measurements yielded excited state absorption (ESA) data that were much less congested than the typical visible transient spectrum. For the neutral nanocluster, the time-domain data were composed of three components: (1) a few-picosecond decay, (2) a slower decay taking a few hundred picoseconds and (3) a non-decaying plateau function. Component 1 reflected energy relaxation to semi-ring ligand states; component 2 was attributed to relaxation via a manifold of states located near the HOMO-LUMO energy gap. Component 3 arose from slow radiative recombination. The dynamics of the anion depended upon the identity of the excited state from which the particle was relaxing. The LUMO+1 state of the anion exhibited relaxation dynamics that were similar to those observed for the neutral nanocluster. By comparison, the time-domain data observed for the LUMO state contained only two components: (1) a 3.3 ± 0.2 ps decay and (2) a 5 ± 1 ns decay. The amplitude coefficients of each component were also analyzed. Taken together, the amplitude coefficients and lifetimes were indicative of an activation barrier located approximately 100 meV above the HOMO-LUMO energy gap, which mediated a previously unobserved excited state decay process for [Au(25)(SR)(18)](0). These data suggested that NIR ESA measurements will be instrumental in describing the relaxation processes of quantum-confined nanoclusters.
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Affiliation(s)
- Thomas D Green
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, USA
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