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Büchner R, Vaz da Cruz V, Grover N, Charisiadis A, Fondell M, Haverkamp R, Senge MO, Föhlisch A. Fundamental electronic changes upon intersystem crossing in large aromatic photosensitizers: free base 5,10,15,20-tetrakis(4-carboxylatophenyl)porphyrin. Phys Chem Chem Phys 2022; 24:7505-7511. [PMID: 35288726 PMCID: PMC8942076 DOI: 10.1039/d1cp05420a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Free base 5,10,15,20-tetrakis(4-carboxylatophenyl)porphyrin stands for the class of powerful porphyrin photosensitizers for singlet oxygen generation and light-harvesting. The atomic level selectivity of dynamic UV pump – N K-edge probe X-ray absorption spectroscopy in combination with time-dependent density functional theory (TD-DFT) gives direct access to the crucial excited molecular states within the unusual relaxation pathway. The efficient intersystem crossing, that is El-Sayed forbidden and not facilitated by a heavy atom is confirmed to be the result of the long singlet excited state lifetime (Qx 4.9 ns) and thermal effects. Overall, the interplay of stabilization by conservation of angular momenta and vibronic relaxation drive the de-excitation in these chromophores. The crucial transient states of free-base porphyrins are characterized by time-resolved X-ray absorption spectroscopy unraveling their unusual relaxation pathway.![]()
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Affiliation(s)
- Robby Büchner
- Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany. .,Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489, Berlin, Germany.
| | - Vinícius Vaz da Cruz
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489, Berlin, Germany.
| | - Nitika Grover
- School of Chemistry, Chair of Organic Chemistry, Trinity College Dublin, The University of Dublin, Trinity Biomedical Sciences Institute, 152-160 Pearse Street, Dublin 2, Ireland
| | - Asterios Charisiadis
- School of Chemistry, Chair of Organic Chemistry, Trinity College Dublin, The University of Dublin, Trinity Biomedical Sciences Institute, 152-160 Pearse Street, Dublin 2, Ireland
| | - Mattis Fondell
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489, Berlin, Germany.
| | - Robert Haverkamp
- Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany. .,Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489, Berlin, Germany.
| | - Mathias O Senge
- Institute for Advanced Study, Technical University of Munich, Lichtenbergstrasse 2a, 85748 Munchen Garching, Germany.
| | - Alexander Föhlisch
- Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany. .,Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489, Berlin, Germany.
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2
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Edmondson M, Frampton ES, Judd CJ, Champness NR, Jones RG, Saywell A. Order, disorder, and metalation of tetraphenylporphyrin (2H-TPP) on Au(111). Chem Commun (Camb) 2022; 58:6247-6250. [DOI: 10.1039/d2cc00820c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A thermally induced order-disorder transition of tetraphenylporphyrin (2H-TPP) on Au(111) is characterised by a combination of scanning probe microscopy and X-ray photoelectron spectroscopy-based techniques. We observed that a transition from...
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3
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Afsharipour R, Dadfarnia S, Haji Shabani AM, Kazemi E, Pedrini A, Verucchi R. Fabrication of a sensitive colorimetric nanosensor for determination of cysteine in human serum and urine samples based on magnetic-sulfur, nitrogen graphene quantum dots as a selective platform and Au nanoparticles. Talanta 2021; 226:122055. [PMID: 33676641 DOI: 10.1016/j.talanta.2020.122055] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 12/05/2020] [Accepted: 12/14/2020] [Indexed: 12/15/2022]
Abstract
A novel colorimetric nanosensor is reported for the selective and sensitive determination of cysteine using magnetic-sulfur, nitrogen graphene quantum dots (Fe3O4/S, N-GQDs), and gold nanoparticles (Au NPs). Thus, S, N-GQDs was firstly immobilized on Fe3O4 nanoparticles through its magnetization in the presence of Fe3+ in the alkali solution. The prepared Fe3O4/S, N-GQDs were dispersed in cysteine solution resulting in its quick adsorption on the surface of the Fe3O4/S, N-GQDs through hydrogen bonding interaction. Then, Au NPs solution was added to this mixture that after a short time, the color of Au NPs changed from red to blue, the intensity of surface plasmon resonance peak of Au NPs at 530 nm decreased, and a new peak at a higher wavelength of 680 nm appeared. The effective parameters on cysteine quantification were optimized via response surface methodology using the central composite design. Under optimum conditions, the absorbance ratio (A680/A530) has a linear proportionality with cysteine concentration in the range of 0.04-1.20 μmol L-1 with a limit of detection of 0.009 μmol L-1. The fabrication of the reported nanosensor is simple, fast, and is capable of efficient quantification of ultra traces of cysteine in human serum and urine real samples.
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Affiliation(s)
- Roya Afsharipour
- Department of Chemistry, Faculty of Science, Yazd University, Yazd, Iran
| | | | | | - Elahe Kazemi
- Environmental and Bio-Analytical Laboratories, Department of Chemistry, Sharif University of Technology, Tehran, Iran
| | - Alessandro Pedrini
- Department of Chemistry, Life Science and Environmental Sustainability, University of Parma, Parco Area Delle Scienze 17/A, 43124 Parma, Italy
| | - Roberto Verucchi
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Trento Unit C/o Fondazione Bruno Kessler, Via Alla Cascata 56/C, Povo, Trento IT-38123, Italy
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4
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Malcıoğlu OB, Bechis I, Bockstedte M. Effect of crystallization on the electronic and optical properties of archetypical porphyrins. Phys Chem Chem Phys 2020; 22:3825-3830. [PMID: 31993599 DOI: 10.1039/c9cp06040e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thin porphyrin films as employed in modern optical devices or photovoltaic applications show deviating electronic and optical properties from the gasphase species. Any understanding of the physical origin may pave way to a specific engineering of these properties via ligand or substituent control. Here we investigate the impact of crystallization of prototypical porphyrins on the electronic levels and optical properties in the framework of density functional theory and many-body perturbation theory. Crystallization substantially shrinks the HOMO-LUMO gap based on polarization effects. We find a shift of the HOMO to higher energy is consistent with recent experiment of MgTPP multilayer film on Ag (100) [A. Classen et al., Phys. Rev. B, 2017, 95, 115414]. Calculated excitation spectra demonstrate a significant redshift of excitation bands except for the Q bands. These lowest excitation bands, in stark contrast to the strong HOMO-LUMO gap renormalization, remain essentially the same as in the gas phase. Our work underlines the possibility of band-gap engineering via ligand-controlled modification of the polarizability.
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Affiliation(s)
- Osman Barış Malcıoğlu
- Chemistry and Physics of Materials, University of Salzburg, Jakob-Haringer-Str. 2a, A-5020 Salzburg, Austria.
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5
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Yang F, Hu W, Yang C, Patrick M, Cooksy AL, Zhang J, Aguiar JA, Fang C, Zhou Y, Meng YS, Huang J, Gu J. Tuning Internal Strain in Metal–Organic Frameworks via Vapor Phase Infiltration for CO
2
Reduction. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000022] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Fan Yang
- Department of Chemistry and Biochemistry San Diego State University 5500 Campanile Drive San Diego USA
| | - Wenhui Hu
- Department of Chemistry Marquette University Milwaukee WI 53201 USA
| | - Chongqing Yang
- The Molecular Foundry Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
| | - Margaret Patrick
- Department of Chemistry and Biochemistry San Diego State University 5500 Campanile Drive San Diego USA
| | - Andrew L. Cooksy
- Department of Chemistry and Biochemistry San Diego State University 5500 Campanile Drive San Diego USA
| | - Jian Zhang
- The Molecular Foundry Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
| | - Jeffery A. Aguiar
- Nuclear Materials Department Idaho National Laboratory 2525 Fremont Avenue Idaho Falls ID 83415 USA
| | - Chengcheng Fang
- Materials Science and Engineering Program University of California San Diego La Jolla CA 92093 USA
| | - Yinghua Zhou
- Department of Chemistry and Biochemistry San Diego State University 5500 Campanile Drive San Diego USA
- The Key Laboratory of Functional Molecular Solids Ministry of Education Anhui Laboratory of Molecule-Based Materials College of Chemistry and Materials Science Anhui Normal University Wuhu 241000 China
| | - Ying Shirley Meng
- Materials Science and Engineering Program University of California San Diego La Jolla CA 92093 USA
| | - Jier Huang
- Department of Chemistry Marquette University Milwaukee WI 53201 USA
| | - Jing Gu
- Department of Chemistry and Biochemistry San Diego State University 5500 Campanile Drive San Diego USA
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6
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Yang F, Hu W, Yang C, Patrick M, Cooksy AL, Zhang J, Aguiar JA, Fang C, Zhou Y, Meng YS, Huang J, Gu J. Tuning Internal Strain in Metal-Organic Frameworks via Vapor Phase Infiltration for CO 2 Reduction. Angew Chem Int Ed Engl 2020; 59:4572-4580. [PMID: 31914215 DOI: 10.1002/anie.202000022] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Indexed: 01/10/2023]
Abstract
A gas-phase approach to form Zn coordination sites on metal-organic frameworks (MOFs) by vapor-phase infiltration (VPI) was developed. Compared to Zn sites synthesized by the solution-phase method, VPI samples revealed approximately 2.8 % internal strain. Faradaic efficiency towards conversion of CO2 to CO was enhanced by up to a factor of four, and the initial potential was positively shifted by 200-300 mV. Using element-specific X-ray absorption spectroscopy, the local coordination environment of the Zn center was determined to have square-pyramidal geometry with four Zn-N bonds in the equatorial plane and one Zn-OH2 bond in the axial plane. The fine-tuned internal strain was further supported by monitoring changes in XRD and UV/Visible absorption spectra across a range of infiltration cycles. The ability to use internal strain to increase catalytic activity of MOFs suggests that applying this strategy will enhance intrinsic catalytic capabilities of a variety of porous materials.
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Affiliation(s)
- Fan Yang
- Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, USA
| | - Wenhui Hu
- Department of Chemistry, Marquette University, Milwaukee, WI, 53201, USA
| | - Chongqing Yang
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Margaret Patrick
- Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, USA
| | - Andrew L Cooksy
- Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, USA
| | - Jian Zhang
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Jeffery A Aguiar
- Nuclear Materials Department, Idaho National Laboratory, 2525 Fremont Avenue, Idaho Falls, ID, 83415, USA
| | - Chengcheng Fang
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
| | - Yinghua Zhou
- Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, USA.,The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, China
| | - Ying Shirley Meng
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
| | - Jier Huang
- Department of Chemistry, Marquette University, Milwaukee, WI, 53201, USA
| | - Jing Gu
- Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, USA
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7
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Mangione G, Carlotto S, Sambi M, Ligorio G, Timpel M, Vittadini A, Nardi MV, Casarin M. Electronic structures of CuTPP and CuTPP(F) complexes. A combined experimental and theoretical study I. Phys Chem Chem Phys 2016; 18:18727-38. [DOI: 10.1039/c6cp01423b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
CuTPP and CuTPP(F) core levels and valence band states are consistently investigated in great detail.
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Affiliation(s)
| | | | - Mauro Sambi
- Dipartimento di Scienze Chimiche, Università di Padova
- Italy
| | - Giovanni Ligorio
- Department of Physics
- Supramolecular Systems Division “SMS”
- Humboldt Universität zu Berlin
- 12489 Berlin
- Germany
| | - Melanie Timpel
- Department of Physics
- Supramolecular Systems Division “SMS”
- Humboldt Universität zu Berlin
- 12489 Berlin
- Germany
| | - Andrea Vittadini
- Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia - ICMATE
- 35131 Padova
- Italy
| | - Marco Vittorio Nardi
- Department of Physics
- Supramolecular Systems Division “SMS”
- Humboldt Universität zu Berlin
- 12489 Berlin
- Germany
| | - Maurizio Casarin
- Dipartimento di Scienze Chimiche, Università di Padova
- Italy
- Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia - ICMATE
- 35131 Padova
- Italy
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8
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Mangione G, Sambi M, Carlotto S, Vittadini A, Ligorio G, Timpel M, Pasquali L, Giglia A, Nardi MV, Casarin M. Electronic structure of CuTPP and CuTPP(F) complexes: a combined experimental and theoretical study II. Phys Chem Chem Phys 2016; 18:24890-904. [DOI: 10.1039/c6cp03956a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
CuTPP and CuTPP(F) thick films deposited on Au(111) have been studied by coupling NEXAFS spectroscopy at the C/N/FK-edges and CuL2,3-edges and spin-unrestricted TD-DFT calculations.
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Affiliation(s)
- Giulia Mangione
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- 35131 Padova
- Italy
| | - Mauro Sambi
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- 35131 Padova
- Italy
| | - Silvia Carlotto
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- 35131 Padova
- Italy
| | - Andrea Vittadini
- Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia – ICMATE
- 35131 Padova
- Italy
| | - Giovanni Ligorio
- Institute for Physics
- Supramolecular Systems Division “SMS” Humboldt Universität zu Berlin
- 12489 Berlin
- Germany
| | - Melanie Timpel
- Institute for Physics
- Supramolecular Systems Division “SMS” Humboldt Universität zu Berlin
- 12489 Berlin
- Germany
- Istituto dei Materiali per l'Elettronica ed il Magnetismo
| | - Luca Pasquali
- Dipartimento di Ingegneria “E. Ferrari”
- Università degli Studi di Modena e Reggio Emilia
- 41125 Modena
- Italy
- Istituto Officina dei Materiali
| | - Angelo Giglia
- Istituto Officina dei Materiali
- IOM-CNR
- Trieste
- Italy
- Istituto di Struttura della Materia
| | - Marco Vittorio Nardi
- Institute for Physics
- Supramolecular Systems Division “SMS” Humboldt Universität zu Berlin
- 12489 Berlin
- Germany
- Istituto dei Materiali per l'Elettronica ed il Magnetismo
| | - Maurizio Casarin
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- 35131 Padova
- Italy
- Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia – ICMATE
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9
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Smykalla L, Shukrynau P, Mende C, Lang H, Knupfer M, Hietschold M. Photoelectron spectroscopy investigation of the temperature-induced deprotonation and substrate-mediated hydrogen transfer in a hydroxyphenyl-substituted porphyrin. Chem Phys 2015. [DOI: 10.1016/j.chemphys.2015.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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10
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Nardi MV, Verucchi R, Pasquali L, Giglia A, Fronzoni G, Sambi M, Mangione G, Casarin M. XAS of tetrakis(phenyl)- and tetrakis(pentafluorophenyl)-porphyrin: an experimental and theoretical study. Phys Chem Chem Phys 2015; 17:2001-11. [DOI: 10.1039/c4cp03958k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
NEXAFS outcomes and TD-DFT calculations pertaining to H2TPP and H2TPP(F) demonstrate the electronic inertness of b1u porphyrin macrocycle 1s → π* excitations. In fact, corresponding excitation energies, but not their oscillator strength values, are substantially unaffected upon fluorination of Ph rings.
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Affiliation(s)
- Marco Vittorio Nardi
- Institute for Physics
- Supramolecular Systems Division “SMS”
- Humboldt Universitat zu Berlin
- 12489 Berlin
- Germany
| | - Roberto Verucchi
- Istituto dei Materiali per l'Elettronica ed il Magnetismo
- IMEM-CNR
- Sezione di Trento
- 38100 Trento
- Italy
| | - Luca Pasquali
- Dipartimento di Ingegneria “Enzo Ferrari”
- Università degli Studi di Modena e Reggio Emilia
- 41125 Modena
- Italy
| | | | - Giovanna Fronzoni
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Trieste
- 34127 Trieste
- Italy
| | - Mauro Sambi
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- 35131 Padova
- Italy
| | - Giulia Mangione
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- 35131 Padova
- Italy
| | - Maurizio Casarin
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- 35131 Padova
- Italy
- Istituto per l'Energetica e le Interfasi
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11
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Mangione G, Sambi M, Nardi MV, Casarin M. A theoretical study of the L3 pre-edge XAS in Cu(ii) complexes. Phys Chem Chem Phys 2014; 16:19852-5. [DOI: 10.1039/c4cp02441a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
L2,3 spectra of Cu(ii) complexes have been simulated by means of time dependent DFT. Besides the agreement between theory and experiment, the adopted approach provided further insights into the use of the Cu(ii) L3-edge intensity and position to investigate the Cu–ligand symmetry-restricted covalency and the ligand-field strength.
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Affiliation(s)
- G. Mangione
- Department of Chemical Sciences and INSTM
- 35131 Padova, Italy
| | - M. Sambi
- Department of Chemical Sciences and INSTM
- 35131 Padova, Italy
| | - M. V. Nardi
- Istituto dei Materiali per l'Elettronica ed il Magnetismo
- Consiglio Nazionale delle Ricerche IMEM-CNR
- 38123 Trento, Italy
- Institut für Physik
- Humboldt-Universität zu Berlin
| | - M. Casarin
- Department of Chemical Sciences and INSTM
- 35131 Padova, Italy
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12
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Ghosh M, Mora AK, Nath S, Chandra AK, Hajra A, Sinha S. Photophysics of Soret-excited free base tetraphenylporphyrin and its zinc analog in solution. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 116:466-472. [PMID: 23973595 DOI: 10.1016/j.saa.2013.07.047] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Accepted: 07/22/2013] [Indexed: 06/02/2023]
Abstract
Photophysical properties of free base tetraphenylporphyrin and its zinc analog are investigated in detail in solvents of varying polarity by using steady state and time-resolved techniques. Both the porphyrins are excited at the Soret band to have better signal-to-noise ratio. Also, the fluorescence emission measurements are carried out by using dilute solutions (~10(-7)mol/L) of the fluorophores in order to minimize the self-quenching effect. It is observed that the steady state absorption and emission characteristics of the porphyrin molecules are mainly affected by polarizability (via refractive index) rather than polarity (via dielectric constant) of the moderate to highly polar solvents. As the molecules are highly symmetric in the ground state, the associated dipole moments are found to be very low from quantum chemical calculations performed by density functional theory method by using Gaussian 03 package. The dipole moments associated with the first excited singlet state of the porphyrins are computed by applying solvatochromic Stokes' shift method. To the best of our knowledge, this is the first attempt to calculate the excited state dipole moments of the porphyrins used in the present investigations. Also, fluorescence quantum yield, fluorescence lifetime of the first excited singlet state, radiative and non-radiative rate constants of the porphyrins are reported in solvents of varying polarity.
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Affiliation(s)
- Mihir Ghosh
- Integrated Science Education and Research Centre, Siksha-Bhavana, Visva-Bharati, Santiniketan 731 235, India
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13
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Nardi MV, Detto F, Aversa L, Verucchi R, Salviati G, Iannotta S, Casarin M. Electronic properties of CuPc and H2Pc: an experimental and theoretical study. Phys Chem Chem Phys 2013; 15:12864-81. [DOI: 10.1039/c3cp51224j] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Nardi M, Verucchi R, Aversa L, Casarin M, Vittadini A, Mahne N, Giglia A, Nannarone S, Iannotta S. Electronic properties of tetrakis(pentafluorophenyl)porphyrin. NEW J CHEM 2013. [DOI: 10.1039/c3nj40910d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Beggan JP, Krasnikov SA, Sergeeva NN, Senge MO, Cafolla AA. Control of the axial coordination of a surface-confined manganese (III) porphyrin complex. NANOTECHNOLOGY 2012; 23:235606. [PMID: 22609865 DOI: 10.1088/0957-4484/23/23/235606] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The organization and thermal lability of chloro(5,10,15,20-tetraphenyl porphyrinato)manganese(III) (Cl-MnTPP) molecules on the Ag(111) surface have been investigated under ultra-high vacuum conditions, using scanning tunnelling microscopy, low energy electron diffraction and x-ray photoelectron spectroscopy. The findings reveal the epitaxial nature of the molecule-substrate interface, and moreover, offer a valuable insight into the latent coordination properties of surface-confined metalloporphyrins. The Cl-MnTPP molecules are found to self-assemble on the Ag(111) surface at room temperature, forming an ordered molecular overlayer described by a square unit cell. In accordance with the threefold symmetry of the Ag(111) surface, three rotationally equivalent domains of the molecular overlayer are observed. The primitive lattice vectors of the Cl-MnTPP overlayer show an azimuthal rotation of ±15° relative to those of the Ag(111) surface, while the principal molecular axes of the individual molecules are found to be aligned with the substrate (0(-)11) and ((-)211) crystallographic directions. The axial chloride (Cl) ligand is found to be orientated away from the Ag(111) surface, whereby the average plane of the porphyrin macrocycle lies parallel to that of the substrate. When adsorbed on the Ag(111) surface, the Cl-MnTPP molecules display a latent thermal lability resulting in the dissociation of the axial Cl ligand at ~423 K. The thermally induced dissociation of the Cl ligand leaves the porphyrin complex otherwise intact, giving rise to the coordinatively unsaturated Mn(III) derivative. Consistent with the surface conformation of the Cl-MnTPP precursor, the resulting (5,10,15,20-tetraphenyl porphyrinato)manganese(III) (MnTPP) molecules display the same lattice structure and registry with the Ag(111) surface.
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Affiliation(s)
- J P Beggan
- School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland.
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16
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Wang X, Wen Y, Luo H, Yu G, Li X, Liu Y, Wang H. Donor-acceptor copolymer based on dioctylporphyrin: Synthesis and application in organic field-effect transistors. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.03.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Kubát P, Šebera J, Záliš S, Langmaier J, Fuciman M, Polívka T, Lang K. Charge transfer in porphyrin–calixarene complexes: ultrafast kinetics, cyclic voltammetry, and DFT calculations. Phys Chem Chem Phys 2011; 13:6947-54. [DOI: 10.1039/c0cp01726d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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