1
|
Li J, Guo M, Wang Y, Ye B, Chen Y, Yang X. Preparation of biological sustained-release nanocapsules and explore on algae-killing properties. J Adv Res 2021; 31:87-96. [PMID: 34194834 PMCID: PMC8240354 DOI: 10.1016/j.jare.2020.12.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 12/08/2020] [Accepted: 12/10/2020] [Indexed: 11/17/2022] Open
Abstract
Introduction Green algae seriously affect the quality and yield of Torreya grandis, it is important to explore new, environmentally friendly ways to control it. Objectives The present study aimed at preparing sustained-release algae-killing nanocapsules without pollution to the environment. Methods In this work, sodium carboxymethylcellulose (CMC), sodium alginate (SA), and chitosan (CTS) were used as raw materials in acylation reaction with the photosensitive catalytic material iron octaaminophthalocyanine (T) to generate the photoactive bio-based materials T-CMC, T-SA, and T-CMCS. Cinnamaldehyde and 2-aminobenzimidazole were combined using chemical grafting to produce a new algicide, and then formed nanocapsules by phase separation. The molecular structure of products was characterized by UV-Vis, FTIR, and NMR (1H NMR, 13C NMR). The particle size of the nanocapsules was determined by Zeta particle size analysis and TEM; DSC was used to investigate the thermal stability; The encapsulation efficiency and sustained-release performance were determined by HPLC. Then the phytotoxic of the new algicide was measured. Results The bio-based nanocapsules was successfully synthesized, which had a particle size of 10-30 nm and was stable at 40 °C. The encapsulation efficiency of the nanocapsules was 48.77%, the cumulative release rate was 83%, and the new algicide killed the green algae in a dose-dependent way. Conclusions The bio-based nano capsule is a new and valuable Sustained-release capsule, which is the method of green algae.
Collapse
Affiliation(s)
- Jinyun Li
- College of Engineering, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
- College of Science, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
| | - Ming Guo
- College of Engineering, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
- College of Science, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
| | - Yiping Wang
- College of Forestry and Bio-technology, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
| | - Bihuan Ye
- Zhejiang Academy of Forestry, Hangzhou, Zhejiang 310023, China
| | - Youwu Chen
- Zhejiang Academy of Forestry, Hangzhou, Zhejiang 310023, China
| | - Xuejuan Yang
- College of Science, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
| |
Collapse
|
2
|
Tasaka Y, Nakamura K, Malola S, Hirata K, Kim K, Koyasu K, Häkkinen H, Tsukuda T. Electron Binding in a Superatom with a Repulsive Coulomb Barrier: The Case of [Ag 44(SC 6H 3F 2) 30] 4- in the Gas Phase. J Phys Chem Lett 2020; 11:3069-3074. [PMID: 32233374 DOI: 10.1021/acs.jpclett.0c00786] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The electron binding mechanism in [Ag44(SC6H3F2)30]4- (SC6H3F2 = 3,4-difluorobenzenethiolate) tetra-anion was studied by photoelectron spectroscopy (PES), collision-induced dissociation mass spectrometry (CID-MS), and density functional theory (DFT) computations. PES showed that [Ag44(SC6H3F2)30]4- is energetically metastable with respect to electron autodetachment {[Ag44(SC6H3F2)30]3- + e-} and features a repulsive Coulomb barrier (RCB) with a height of 2.7 eV. However, CID-MS revealed that [Ag44(SC6H3F2)30]4- does not release an electron upon collisional excitation but undergoes dissociation. DFT computations performed on the known structure of [Ag44(SC6H3F2)30]4- confirmed the negative adiabatic electron affinity of [Ag44(SC6H3F2)30]3- and interpreted the experimental PE spectrum by taking into account tunneling electron photodetachment through the RCB.
Collapse
Affiliation(s)
- Yuriko Tasaka
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Katsunosuke Nakamura
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Sami Malola
- Departments of Physics and Chemistry, Nanoscience Center, University of Jyväskylä, FI-40014 Jyväskylä, Finland
| | - Keisuke Hirata
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kuenhee Kim
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kiichirou Koyasu
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
| | - Hannu Häkkinen
- Departments of Physics and Chemistry, Nanoscience Center, University of Jyväskylä, FI-40014 Jyväskylä, Finland
| | - Tatsuya Tsukuda
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
| |
Collapse
|
3
|
Daly S, Porrini M, Rosu F, Gabelica V. Electronic spectroscopy of isolated DNA polyanions. Faraday Discuss 2019; 217:361-382. [DOI: 10.1039/c8fd00207j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We address whether action spectroscopy could be used to investigate structural changes in gas-phase biomolecule (e.g. nucleic acid) ions, owing to changes in the environments of their chromophores, while taking advantage of the additional spectrometric separation of complex mixtures.
Collapse
Affiliation(s)
- Steven Daly
- Laboratoire Acides Nucléiques: Régulations Naturelle et Artificielle
- Université de Bordeaux
- Inserm & CNRS (ARNA, U1212, UMR5320)
- IECB
- 33607 Pessac
| | - Massimiliano Porrini
- Laboratoire Acides Nucléiques: Régulations Naturelle et Artificielle
- Université de Bordeaux
- Inserm & CNRS (ARNA, U1212, UMR5320)
- IECB
- 33607 Pessac
| | - Frédéric Rosu
- Institut Européen de Chimie et Biologie
- Université de Bordeaux
- CNRS & Inserm (IECB, UMS3033, US001)
- 33607 Pessac
- France
| | - Valérie Gabelica
- Laboratoire Acides Nucléiques: Régulations Naturelle et Artificielle
- Université de Bordeaux
- Inserm & CNRS (ARNA, U1212, UMR5320)
- IECB
- 33607 Pessac
| |
Collapse
|
4
|
Voss JM, Duffy EM, Marsh BM, Garand E. Mass Spectrometric and Vibrational Characterization of Reaction Intermediates in [Ru(bpy)(tpy)(H 2 O)] 2+ Catalyzed Water Oxidation. Chempluschem 2017; 82:691-694. [PMID: 31961527 DOI: 10.1002/cplu.201700085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 04/03/2017] [Indexed: 11/09/2022]
Abstract
Mass spectrometry coupled with an in-line electrochemical electrospray ionization source is used to capture some of the reaction intermediates formed in the [Ru(bpy)(tpy)(H2 O)]2+ (bpy=2,2'-bipyridine, tpy=2,2':6',2"-terpyridine) catalyzed water oxidation reaction. By controlling the applied electrochemical potential, we identified the parent complex, as well as the first two oxidation complexes, identified as [Ru(bpy)(tpy)(OH)]2+ and [Ru(bpy)(tpy)(O)]2+ . The structures of the parent and first oxidation complexes are probed directly in the mass spectrometer by using infrared predissociation spectroscopy of D2 -tagged ions. Comparisons between experimental vibrational spectra and density functional theory calculations confirmed the identity and structure of these two complexes. Moreover, the frequency of the O-H stretching mode in [Ru(bpy)(tpy)(OH)]2+ shows that this complex features a Ru-OH interaction that is more covalent than ionic.
Collapse
Affiliation(s)
- Jonathan M Voss
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA), E-mail: Etienne Garand
| | - Erin M Duffy
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA), E-mail: Etienne Garand
| | - Brett M Marsh
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA), E-mail: Etienne Garand
| | - Etienne Garand
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA), E-mail: Etienne Garand
| |
Collapse
|
5
|
Daly S, Girod M, Vojkovic M, Giuliani A, Antoine R, Nahon L, O'Hair RAJ, Dugourd P. Single-Photon, Double Photodetachment of Nickel Phthalocyanine Tetrasulfonic Acid 4- Anions. J Phys Chem Lett 2016; 7:2586-2590. [PMID: 27327376 DOI: 10.1021/acs.jpclett.6b01030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Single-photon, two-electron photodetachment from nickel phthalocyanine tetrasulfonic acid tetra anions, [NiPc](4-), was examined in the gas-phase using a linear ion trap coupled to the DESIRS VUV beamline of the SOLEIL Synchrotron. This system was chosen since it has a low detachment energy, known charge localization, and well-defined geometrical and electronic structures. A threshold for two-electron loss is observed at 10.2 eV, around 1 eV lower than previously observed double detachment thresholds on multiple charged protein anions. The photodetachment energy of [NiPc](4-) has been previously determined to be 3.5 eV and the photodetachment energy of [NiPc](3-•) is determined in this work to be 4.3 eV. The observed single photon double electron detachment threshold is hence 5.9 eV higher than the energy required for sequential single electron loss. Possible mechanisms are for double photodetachment are discussed. These observations pave the way toward new, exciting experiments for probing double photodetachment at relatively low energies, including correlation measurements on emitted photoelectrons.
Collapse
Affiliation(s)
- Steven Daly
- Institut Lumière Matière, Université Claude Bernard Lyon 1, CNRS UMR 5306 , F-69622 Lyon, France
| | - Marion Girod
- Institut des Sciences Analytiques, Université de Lyon, Université Claude Bernard Lyon 1, CNRS & ENS Lyon, UMR 5280 , 69100 Villeurbanne, France
| | - Marin Vojkovic
- Institut Lumière Matière, Université Claude Bernard Lyon 1, CNRS UMR 5306 , F-69622 Lyon, France
| | - Alexandre Giuliani
- SOLEIL, l'Orme des Merisiers, St Aubin, BP48, F-91192 Gif sur Yvette Cedex, France
- INRA, UAR1008 Caractérisation et Élaboration des Produits Issus de l'Agriculture, F-44316 Nantes, France
| | - Rodolphe Antoine
- Institut Lumière Matière, Université Claude Bernard Lyon 1, CNRS UMR 5306 , F-69622 Lyon, France
| | - Laurent Nahon
- SOLEIL, l'Orme des Merisiers, St Aubin, BP48, F-91192 Gif sur Yvette Cedex, France
| | | | - Philippe Dugourd
- Institut Lumière Matière, Université Claude Bernard Lyon 1, CNRS UMR 5306 , F-69622 Lyon, France
| |
Collapse
|
6
|
Wang LS. Perspective: Electrospray photoelectron spectroscopy: From multiply-charged anions to ultracold anions. J Chem Phys 2015; 143:040901. [DOI: 10.1063/1.4927086] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Affiliation(s)
- Lai-Sheng Wang
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA
| |
Collapse
|
7
|
DiTucci MJ, Heiles S, Williams ER. Role of Water in Stabilizing Ferricyanide Trianion and Ion-Induced Effects to the Hydrogen-Bonding Water Network at Long Distance. J Am Chem Soc 2015; 137:1650-7. [DOI: 10.1021/ja5119545] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Matthew J. DiTucci
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Sven Heiles
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Evan R. Williams
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| |
Collapse
|
8
|
Jin HG, Balaban MC, Chevallier-Michaud S, Righezza M, Balaban TS. Biomimetic self-assembling acylphthalocyanines. Chem Commun (Camb) 2015; 51:11884-7. [DOI: 10.1039/c5cc04602e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A series of biomimetic zinc metallated acylphthalocyanines equipped with carbonyl and/or hydroxyl recognition groups, and various solubilising alkyl chains (R = CH3 to C15H31) that mimicked natural chlorosomal bacteriochlorophylls (shown at left) were synthesized successfully.
Collapse
Affiliation(s)
- Hong-Guang Jin
- Aix-Marseille Université
- CNRS UMR 7313
- Centrale Marseille
- Chirosciences
- Service 442
| | | | | | - Michel Righezza
- Aix-Marseille Université
- CNRS UMR 7313
- Centrale Marseille
- Chirosciences
- Service 442
| | | |
Collapse
|
9
|
Verlet JRR, Horke DA, Chatterley AS. Excited states of multiply-charged anions probed by photoelectron imaging: riding the repulsive Coulomb barrier. Phys Chem Chem Phys 2014; 16:15043-52. [DOI: 10.1039/c4cp01667j] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recent progress towards understanding the repulsive Coulomb barrier in multiply-charged anion using photoelectron spectroscopy is discussed.
Collapse
Affiliation(s)
| | - Daniel A. Horke
- Center for Free-Electron Laser Science
- DESY
- 22607 Hamburg, Germany
| | | |
Collapse
|
10
|
Schwarz U, Vonderach M, Armbruster MK, Fink K, Kappes MM, Weis P. Cu(II)- and Mn(III)-porphyrin-derived oligomeric multianions: structures and photoelectron spectra. J Phys Chem A 2013; 118:369-79. [PMID: 24328135 DOI: 10.1021/jp411149e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We present structures and photoelectron spectra of Mn(III) and Cu(II) meso-tetra(4-sulfonatophenyl)porphyrin (TPPS) multianions, as well as of homomolecular dimers and trimers thereof. The structural assignments are based on a combination of mass spectrometry, ion mobility measurements, and semiempirical as well as density functional theory (DFT) calculations. Depending on the type of central metal atom, two completely different dimer structural motifs are found. With a central Mn(III), the monomeric units are connected via sulfonic-acid-manganese bonds resulting in a tilted stack arrangement of porphyrin rings. With Cu(II) as the central atom, the sulfonic acid groups preferentially bind to the sodium counterions, resulting in a flat dimer structure with coplanar porphyrins. Photoelectron spectra were recorded for monomers, dimers, and trimers, each in a number of different negative charge states as determined by protonation degree (+nH). In some cases, e.g., [Cu(II)TPPS](4-), [(Mn(III)TPPS)2 + H](5-), and [(Mn(III)TPPS)3 + 3H](6-), we observe electron detachment energies close to zero, or even slightly negative. In all cases, we find a large repulsive Coulomb barrier. The observed trends in detachment energies can be interpreted in terms of a simple electrostatic model.
Collapse
Affiliation(s)
- Ulrike Schwarz
- Karlsruhe Institute of Technology, Institut für Physikalische Chemie , Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | | | | | | | | | | |
Collapse
|
11
|
Kaufman SH, Weber JM, Pernpointner M. Electronic structure and UV spectrum of hexachloroplatinate dianions in vacuo. J Chem Phys 2013; 139:194310. [DOI: 10.1063/1.4830407] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
|
12
|
Schinle F, Crider PE, Vonderach M, Weis P, Hampe O, Kappes MM. Spectroscopic and theoretical investigations of adenosine 5'-diphosphate and adenosine 5'-triphosphate dianions in the gas phase. Phys Chem Chem Phys 2013; 15:6640-50. [PMID: 23258289 DOI: 10.1039/c2cp43808a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Doubly deprotonated adenosine 5'-diphosphate ([ADP-2H](2-)) and adenosine 5'-triphosphate ([ATP-2H](2-)) dianions were investigated using infrared multiple photon dissociation (IR-MPD) and photoelectron spectroscopy. Vibrational spectra acquired in the X-H stretch region (X = C, N, O) and augmented by isotope-labelling were compared to density functional theory (DFT) calculations at the B3LYP/TZVPP level. This suggests that in [ATP-2H](2-) the two phosphate groups adjacent to the ribose ring are preferentially deprotonated. Photoelectron spectra recorded at 4.66 and 6.42 eV photon energies revealed adiabatic detachment energies of 1.35 eV for [ADP-2H](2-) and 3.35 eV for [ATP-2H](2-). Repulsive Coulomb barriers were estimated at ~2.2 eV for [ADP-2H](2-) and ~1.9 eV for [ATP-2H](2-). Time-dependent DFT calculations have been used to simulate the photoelectron spectra. Photodetachment occurs primarily from lone pair orbitals on oxygen atoms within the phosphate chain.
Collapse
Affiliation(s)
- Florian Schinle
- Institut für Physikalische Chemie, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany
| | | | | | | | | | | |
Collapse
|
13
|
Dixon DW, Gill AF, Sook BR. Characterization of sulfonated phthalocyanines by mass spectrometry and capillary electrophoresis. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424604000672] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We report the characterization of sulfonated phthalocyanines using capillary electrophoresis and mass spectrometry. Derivatives investigated included the copper, cobalt, zinc and metal-free sulfonated phthalocyanines. In general, sulfonated phthalocyanines were found as aggregates in capillary electrophoresis separations, even at low concentration. Separations were much better at pH 9.0 than at pH 2.5. The addition of β-cyclodextrin did not alter the electropherograms significantly. The electropherograms of commercially available copper phthalocyanine-3,4',4″,4‴-tetrasulfonic acid and 4,4',4″,4‴-tetrasulfonic acid were very different, consistent with the latter compound having a structure that is not fully sulfonated. Matrix-assisted laser desorption/ionization (MALDI) and electrospray ionization (ESI) were used to characterize the sulfonated phthalocyanines. In general, MALDI gave better results than ESI. Mass spectral evidence was obtained for a pentasulfonated species of both the metal-free phthalocyanine and zinc phthalocyanine when these species were made by sulfonation of the metal-free phthalocyanine (followed by zinc insertion in the latter case). Sulfonated tetraphenylporphyrin derivatives were used as standards for mass spectrometry and to estimate the effect of net charge on the capillary electrophoresis migration time for sulfonated tetrapyrroles. Clean separation of the sulfonated tetraphenylporphyrin derivatives [5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (TPPS4), 5,10,15-tris(4-sulfonatophenyl)-20-phenylporphyrin (TPPS3) and 5,10-bis(4-sulfonatophenyl)-15,20-diphenylporphyrin (TPPS2a)] was observed by capillary electrophoresis.
Collapse
Affiliation(s)
- Dabney W. Dixon
- Department of Chemistry, Box 4098, Georgia State University, Atlanta, GA 30303-4098, USA
| | - Anila F. Gill
- Department of Chemistry, Box 4098, Georgia State University, Atlanta, GA 30303-4098, USA
| | - Brian R. Sook
- Department of Chemistry, Box 4098, Georgia State University, Atlanta, GA 30303-4098, USA
| |
Collapse
|
14
|
Jiang Z, He W, Yao H, Wang J, Chen N, Huang J. Isomeric separation and identification of tetra-, tri-, and di-β-sulphonic phthalocyanine zinc complexes. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424611003069] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The synthesis, isomeric separation, and identification of β-sulphonic phthalocyanine zinc complexes were reported. While the sulphonic phthalocyanines have been studied extensively, the development of separation technology may enable deeper insights into their isomeric constitution. An ion-pair reversed-phase high performance liquid chromatography (IP-RP-HPLC) method was developed to separate the sulphonic phthalocyanine isomers. The results showed that the product of the condensation reaction is a mixture of all possible isomers with statistical distribution. Several isomers were obtained and structural determination was undertaken by NMR. Based on the IP-RP-HPLC elution sequence of these well-identified isomers, a relationship between the structure and efficiency was deduced: closely spaced intervals of sulphonic groups lead to higher hydrophobicity and shorter retention times on HPLC. Based on this relationship, each HPLC peak was assigned to the corresponding isomeric structure.
Collapse
Affiliation(s)
- Zhou Jiang
- Institute of Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Fuzhou University, Fujian 350002, P.R. China
| | - Wenyi He
- Institute of Materia Medica Chinese Academy of Medical Sciences & Peking Union Medical College, Peking 100050, P.R. China
| | - Huisheng Yao
- Institute of Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Fuzhou University, Fujian 350002, P.R. China
| | - Jian Wang
- Institute of Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Fuzhou University, Fujian 350002, P.R. China
| | - Naisheng Chen
- Institute of Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Fuzhou University, Fujian 350002, P.R. China
| | - Jinling Huang
- Institute of Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Fuzhou University, Fujian 350002, P.R. China
| |
Collapse
|
15
|
Vonderach M, Ehrler OT, Matheis K, Karpuschkin T, Papalazarou E, Brunet C, Antoine R, Weis P, Hampe O, Kappes MM, Dugourd P. Probing electrostatic interactions and structural changes in highly charged protein polyanions by conformer-selective photoelectron spectroscopy. Phys Chem Chem Phys 2011; 13:15554-8. [PMID: 21804966 DOI: 10.1039/c1cp21528k] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Matthias Vonderach
- Institut für Physikalische Chemie, Karlsruhe Institute of Technology (KIT), D-76131 Karlsruhe, Germany
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Ning CG, Dau PD, Wang LS. Guiding electron emissions by excess negative charges in multiply charged molecular anions. PHYSICAL REVIEW LETTERS 2010; 105:263001. [PMID: 21231651 DOI: 10.1103/physrevlett.105.263001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2010] [Indexed: 05/30/2023]
Abstract
Using photoelectron imaging, we show the effects of excess negative charges on the directions of outgoing electrons in multiply charged anions. Photoemissions are observed to occur either in a perpendicular or parallel direction, depending on the molecular configurations and origins of the detached electrons. Detachment of the π electrons from biphenyl-disulfonate dianions is shown to occur in a perpendicular direction due to the Coulomb repulsion from the two terminal charges, whereas detachment from the sulfonate groups in linear aliphatic disulfonates occurs in parallel directions.
Collapse
Affiliation(s)
- Chuan-Gang Ning
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA
| | | | | |
Collapse
|
17
|
Affiliation(s)
- John Mack
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan
| | | |
Collapse
|
18
|
Schooss D, Weis P, Hampe O, Kappes MM. Determining the size-dependent structure of ligand-free gold-cluster ions. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2010; 368:1211-1243. [PMID: 20156823 DOI: 10.1098/rsta.2009.0269] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Ligand-free metal clusters can be prepared over a wide size range, but only in comparatively small amounts. Determining their size-dependent properties has therefore required the development of experimental methods that allow characterization of sample sizes comprising only a few thousand mass-selected particles under well-defined collision-free conditions. In this review, we describe the application of these methods to the geometric structural determination of Au(n)(+) and Au(n)(-) with n = 3-20. Geometries were assigned by comparing experimental data, primarily from ion-mobility spectrometry and trapped ion electron diffraction, to structural models from quantum chemical calculations.
Collapse
Affiliation(s)
- Detlef Schooss
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | | | | | | |
Collapse
|
19
|
Xing XP, Wang XB, Wang LS. Photoelectron Imaging of Doubly Charged Anions, −O2C(CH2)nCO2− (n = 2−8): Observation of Near 0 eV Electrons Due to Secondary Dissociative Autodetachment. J Phys Chem A 2010; 114:4524-30. [DOI: 10.1021/jp1011523] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiao-Peng Xing
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, and Department of Chemistry, Brown University, Providence, Rhode Island 02912
| | - Xue-Bin Wang
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, and Department of Chemistry, Brown University, Providence, Rhode Island 02912
| | - Lai-Sheng Wang
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, and Department of Chemistry, Brown University, Providence, Rhode Island 02912
| |
Collapse
|
20
|
Wang XB, Sergeeva AP, Xing XP, Massaouti M, Karpuschkin T, Hampe O, Boldyrev AI, Kappes MM, Wang LS. Probing the Electronic Stability of Multiply Charged Anions: Sulfonated Pyrene Tri- and Tetraanions. J Am Chem Soc 2009; 131:9836-42. [DOI: 10.1021/ja903615g] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xue-Bin Wang
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Alina P. Sergeeva
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Xiao-Peng Xing
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Maria Massaouti
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Tatjana Karpuschkin
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Oliver Hampe
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Alexander I. Boldyrev
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Manfred M. Kappes
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| | - Lai-Sheng Wang
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Richland, Washington 99352, Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Cheme, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe,
| |
Collapse
|
21
|
Rensing C, Ehrler OT, Yang JP, Unterreiner AN, Kappes MM. Photodissociation dynamics of IrBr62− dianions by time-resolved photoelectron spectroscopy. J Chem Phys 2009; 130:234306. [DOI: 10.1063/1.3148377] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
|
22
|
Affiliation(s)
- Xue-Bin Wang
- Department of Physics, Washington State University, Richland, Washington 99354, and Chemical and Materials Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352;
| | - Lai-Sheng Wang
- Department of Physics, Washington State University, Richland, Washington 99354, and Chemical and Materials Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352;
| |
Collapse
|
23
|
Jiang Z, He W, Wang J, Chen N, Huang J. Identification of Sulfonic Phthalocyaninatozinc Isomers. CHEM LETT 2009. [DOI: 10.1246/cl.2009.52] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
24
|
Marcum JC, Weber JM. Electronic photodissociation spectra and decay pathways of gas-phase IrBr[sub 6]2−]. J Chem Phys 2009; 131:194309. [DOI: 10.1063/1.3265956] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
|
25
|
Matheis K, Joly L, Antoine R, Lépine F, Bordas C, Ehrler OT, Allouche AR, Kappes MM, Dugourd P. Photoelectron Spectroscopy of Gramicidin Polyanions: Competition between Delayed and Direct Emission. J Am Chem Soc 2008; 130:15903-6. [DOI: 10.1021/ja803758w] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Katerina Matheis
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Laure Joly
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Rodolphe Antoine
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Franck Lépine
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Christian Bordas
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Oli T. Ehrler
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Abdul-Rahman Allouche
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Manfred M. Kappes
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| | - Philippe Dugourd
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany, and Université de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne; CNRS, UMR 5579, LASIM
| |
Collapse
|
26
|
The constitutes and isomer distribution of di-(potassium sulfonate)-di-phthalimidomethyl phthalocyanine zinc. Sci Bull (Beijing) 2008. [DOI: 10.1007/s11434-008-0223-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
|
27
|
Yang J, Xing XP, Wang XB, Wang LS, Sergeeva AP, Boldyrev AI. Negative electron binding energies observed in a triply charged anion: Photoelectron spectroscopy of 1-hydroxy-3,6,8-pyrene-trisulfonate. J Chem Phys 2008; 128:091102. [DOI: 10.1063/1.2889001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
28
|
Ehrler OT, Yang JP, Sugiharto AB, Unterreiner AN, Kappes MM. Excited state dynamics of metastable phthalocyanine-tetrasulfonate tetra-anions probed by pump/probe photoelectron spectroscopy. J Chem Phys 2007; 127:184301. [DOI: 10.1063/1.2780842] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
|
29
|
Waters T, Wang XB, Wang LS. Electrospray ionization photoelectron spectroscopy: Probing the electronic structure of inorganic metal complexes in the gas-phase. Coord Chem Rev 2007. [DOI: 10.1016/j.ccr.2006.04.010] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
30
|
Feuerbacher S, Cederbaum LS. A small and stable covalently bound trianion. J Chem Phys 2006; 124:044320. [PMID: 16460175 DOI: 10.1063/1.2162894] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Stable doubly charged anions have become well known over the past decade, but the knowledge about higher-charged molecules is still sparse. Especially the minimum size of a covalently bound trianion which is still stable is an open question. Here, we present the smallest trianion of this kind known up to now, namely, B(C(2)CO(2))(3) (3-). After establishing its geometrical parameters, we investigate its stability with respect to electron autodetachment and fragmentation of the molecular framework. Our results lend strong support to the notion that this trianion indeed represents a stable compound which should be observable in the gas phase.
Collapse
Affiliation(s)
- Sven Feuerbacher
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany.
| | | |
Collapse
|
31
|
Löffler D, Weber JM, Kappes MM. Photodetachment spectroscopy of PtBr42−: Probing the Coulomb barrier of a doubly charged anion. J Chem Phys 2005; 123:224308. [PMID: 16375477 DOI: 10.1063/1.2135769] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
We probe the repulsive Coulomb barrier of the doubly charged anion PtBr(4) (2-) by photodetachment spectroscopy. The results are discussed in terms of models for the photoemission process, the excitation spectrum of PtBr(4) (2-), and calculations of the energy-dependent tunneling probability for various model potentials.
Collapse
Affiliation(s)
- D Löffler
- Institut für Physikalische Chemie, Universität Karlsruhe, D-76128 Karlsruhe, Germany
| | | | | |
Collapse
|
32
|
Neumaier M, Hampe O, Kappes MM. Electron transfer collisions between isolated fullerene dianions and SF6. J Chem Phys 2005; 123:074318. [PMID: 16229581 DOI: 10.1063/1.2008259] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Electron transfer collisions of trapped doubly charged fullerene anions C76(2-), C(78)2-, and C84(2-) with SF6 are studied in a Fourier transform ion cyclotron resonance mass spectrometer at center-of-mass collisional energies ranging from thermal energy to 77 eV. Collision energy dependencies manifest threshold energies for (nominally exoergic) single electron transfer onto SF6 of 1.46+/-0.3 eV, 1.56+/-0.3 eV, and 1.63+/-0.3 eV for C(76)2-, C78(2-), and C(84)2-, respectively. Kinetics studies reveal charge-transfer cross sections of up to 430+/-200 A2 for C84(2-) at a collision energy of 77 eV. The mechanism and the energetics are discussed in terms of classical electrostatic model calculations. Additionally, we rationalize the collision energy dependencies of the charge-transfer cross sections using the two-state Landau-Zener formalism to describe the associated resonant electron tunneling probability.
Collapse
Affiliation(s)
- Marco Neumaier
- Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany
| | | | | |
Collapse
|
33
|
Eichhöfer A, Hampe O. Mass spectrometric study on the neutral nanocluster [Cd32Se14(SePh)36L4] (L=THF, OPPh3) upon charged ligand exchange. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.03.085] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
34
|
Ehrler OT, Furche F, Weber JM, Kappes MM. Photoelectron spectroscopy of fullerene dianions C762−, C782−, and C842−. J Chem Phys 2005; 122:094321. [PMID: 15836142 DOI: 10.1063/1.1859272] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report laser photoelectron spectra of the doubly negatively charged fullerenes C(76) (2-), C(78) (2-), and C(84) (2-) at 2.33, 3.49, and 4.66 eV photon energy. From these spectra, second electron affinities and vertical detachment energies, as well as estimates for the repulsive Coulomb barriers are obtained. These results are discussed in the context of electrostatic models. They reveal that fullerenes are similar to conducting spheres, with electronic properties scaling with their size. The experimental spectra are compared with the accessible excited states of the respective singly charged product ions calculated in the framework of time dependent density functional theory.
Collapse
Affiliation(s)
- Oli T Ehrler
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany
| | | | | | | |
Collapse
|
35
|
Weber JM, Ioffe IN, Berndt KM, Löffler D, Friedrich J, Ehrler OT, Danell AS, Parks JH, Kappes MM. Photoelectron spectroscopy of isolated multiply negatively charged oligonucleotides. J Am Chem Soc 2004; 126:8585-9. [PMID: 15238018 DOI: 10.1021/ja049736c] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ultraviolet photoelectron spectroscopy in an ion beam was used to investigate the electronic properties of isolated DNA oligonucleotides [dA(5)-4H](4-) and [dT(5)-4H](4-), carrying four excess negative charges. We find the fourth adiabatic electron affinity to be slightly negative for [dA(5)-4H](4-), while it is positive for [dT(5)-4H](4-). This implies a significant influence of the base composition on energetics, which is in turn relevant for analytic applications and also for charge transport properties.
Collapse
Affiliation(s)
- J Mathias Weber
- Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstr. 12, D-76128 Karlsruhe, Germany.
| | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Kordel M, Schooss D, Gilb S, Blom MN, Hampe O, Kappes MM. Photodissociation of Trapped Metastable Multiply Charged Anions: A Routine Electronic Spectroscopy of Isolated Large Molecules? J Phys Chem A 2004. [DOI: 10.1021/jp049261b] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mattias Kordel
- Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstraβe 12, D-76128 Karlsruhe, Germany
| | - Detlef Schooss
- Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstraβe 12, D-76128 Karlsruhe, Germany
| | - Stefan Gilb
- Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstraβe 12, D-76128 Karlsruhe, Germany
| | - Martine N. Blom
- Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstraβe 12, D-76128 Karlsruhe, Germany
| | - Oliver Hampe
- Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstraβe 12, D-76128 Karlsruhe, Germany
| | - Manfred M. Kappes
- Institut für Nanotechnologie, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, and Institut für Physikalische Chemie, Universität Karlsruhe, Kaiserstraβe 12, D-76128 Karlsruhe, Germany
| |
Collapse
|
37
|
Fournier M, Pépin C, Houde D, Ouellet R, van Lier JE. Ultrafast studies of the excited-state dynamics of copper and nickel phthalocyanine tetrasulfonates: potential sensitizers for the two-photon photodynamic therapy of tumors. Photochem Photobiol Sci 2004; 3:120-6. [PMID: 14768627 DOI: 10.1039/b302787b] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In order to evaluate the potential of copper and nickel phthalocyanine tetrasulfonates as sensitizers for two-photon photodynamic therapy, we conducted kinetic femtosecond measurements of transient absorption and bleaching of their excited state dynamics in aqueous solution. Samples were pumped with 620 nm and 310 nm laser light, which allowed us to study relaxation processes from both the first and second singlet (or doublet for the copper phthalocyanine) excited states. A second excitation from the first excited triplet state, approximately 685 and 105 ps after the first excitation for copper and nickel phthalocyanine tetrasulfonate respectively, was the most efficient way to bring the molecules to an upper triplet state. Presumably this highest triplet state can inflict molecular damage on adjacent biomolecules int eh absence of oxygen, resulting in the desired cytotoxic cellular response. Transient absorption spectra at different fixed delays indicate that optimum efficiency would require that the second photon has a wavelength of approximately 750 nm.
Collapse
Affiliation(s)
- Michel Fournier
- Départment de médicine nucléaire et radiobiologie, Faculté de médicine, Université de Sherbrooke, Sherbrooke, Canada
| | | | | | | | | |
Collapse
|