1
|
Ray A, Bhattacharya S. Study of alloyed quantum dots-porphyrazine interaction in solution. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
2
|
Mori S, Kawamoto N, Uno H. Chrysene-Bridged Porphyrin Tweezers: Chiral Receptors for Fullerenes. Chempluschem 2020; 84:686-693. [PMID: 31944003 DOI: 10.1002/cplu.201900046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 03/01/2019] [Indexed: 11/07/2022]
Abstract
Bis(bicyclic) molecules dimethanochrysene and diethanochrysene were prepared by Diels-Alder reaction of the naphthodiyne equivalent with cyclopentadiene and 1,3-cyclohexadiene, respectively. Reaction of dimethanochrysene and 7,9-diphenyl-8H-cyclopent[a]acenaphthylen-8-one resulted in the generation of a fluorescent hydrocarbon in unexpected multistep pericyclic reactions. Syn-oriented diethanochrysene-connected bisporphyrin tweezers was prepared from the reaction of chrysene-bridged syn-dipyrrole with tripyrranedicarbaldehyde. The structure of the receptor and its 1 : 1 complex with C60 or C70 was determined by X-ray diffraction analysis. The dihedral angles of the bicyclo[2.2.2]octadiene moieties were narrowed by complexation of the receptor with the fullerenes. The binding affinities of the tweezers with C60 and C70 were calculated to be 2.7(4)×104 and 8.01(7)×104 M-1 , respectively by UV-vis and fluorescence spectroscopy.
Collapse
Affiliation(s)
- Shigeki Mori
- Division of Material Science, Advanced Research Support Center, Ehime University, 2-5 Bunkyo-cho, Matsuyama, 790-8577, Japan
| | - Naoki Kawamoto
- Department of Chemistry and Biology Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama, 790-8577, Japan
| | - Hidemitsu Uno
- Department of Chemistry and Biology Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama, 790-8577, Japan
| |
Collapse
|
3
|
Takeda M, Hiroto S, Yokoi H, Lee S, Kim D, Shinokubo H. Azabuckybowl-Based Molecular Tweezers as C60 and C70 Receptors. J Am Chem Soc 2018; 140:6336-6342. [DOI: 10.1021/jacs.8b02327] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Motoki Takeda
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Satoru Hiroto
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Hiroki Yokoi
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Sangsu Lee
- Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemoon-gu, Seoul 03722, Korea
| | - Dongho Kim
- Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemoon-gu, Seoul 03722, Korea
| | - Hiroshi Shinokubo
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| |
Collapse
|
4
|
Tobolkina EA, Skripnikova TA, Starikova AA, Shumilova GI, Pendin AA. Features of proteolytic properties of tetraphenylporphyrin complex with lanthanide group metals. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 189:227-230. [PMID: 28820975 DOI: 10.1016/j.saa.2017.08.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 07/27/2017] [Accepted: 08/04/2017] [Indexed: 06/07/2023]
Abstract
UNLABELLED Demetallation of metalloporphyrin molecules is one of the essential degradation reactions in photosynthesis. The effect of metalloporphyrin nature on removal of central metals from tetraphenylporphyrin complexes based on lanthanide group metals (Dy, Er, Lu, Ho) has been studied. pH values, at which the metal ions leave the metalloporphyrin complex were established using two-phase spectrophotometric titration with potentiometric pH-control. The pH values decrease with the increase of atomic numbers of lanthanide groups, as well as with increase of 4f-electrons. The reaction of an extra ligand exchange for the hydroxide ion was studied. For Dy-, Er- and Ho-tetraphenylporphyrin complexes one particle of extra ligand coordinates with one porphyrin complex. A complex with dimeric particles can be formed for the system of Lu-tetraphenylporphyrin. Constants of the ion exchange reactions were calculated. SYNOPSIS The effect of metalloporphyrin nature on removal of central metals from tetraphenylporphyrin complexes based on lanthanide group metals (Dy, Er, Lu, Ho) has been studied. The heterophase reaction of ion-selective electrodes were calculated, as well as the reaction of an extra ligand exchange for the hydroxide ion.
Collapse
Affiliation(s)
- Elena A Tobolkina
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, École Polytechnique Fédérale de Lausanne, Station 19, CH-1015 Lausanne, Switzerland.
| | - Tatiana A Skripnikova
- St. Petersburg State University of Industrial Technologies and Design, Bolshaya Morskaja 18, 191186 Saint-Petersburg, Russia
| | - Anna A Starikova
- Saint-Petersburg University, St.Petersburg State University, SPbSU, SPbU, 7/9 Universitetskaya nab., St. Petersburg,199034, Russia
| | - Galina I Shumilova
- Saint-Petersburg University, St.Petersburg State University, SPbSU, SPbU, 7/9 Universitetskaya nab., St. Petersburg,199034, Russia
| | - Andrey A Pendin
- Saint-Petersburg University, St.Petersburg State University, SPbSU, SPbU, 7/9 Universitetskaya nab., St. Petersburg,199034, Russia
| |
Collapse
|
5
|
Pal D, Ray A, Bhattacharya S. Influence of the energy of charge transfer on non-covalent interactions between fullerenes and a designed bisporphyrin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 95:317-330. [PMID: 22561755 DOI: 10.1016/j.saa.2012.03.083] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Revised: 03/18/2012] [Accepted: 03/25/2012] [Indexed: 05/31/2023]
Abstract
The present paper reports the spectroscopic and theoretical investigations on the formation of supramolecular complexes of a designed bisporphyrin (1) with C(60) and C(70) in toluene. Absorption spectrophotometric studies establish appreciable amount of ground state electronic interaction between fullerenes and 1. The interaction is facilitated through charge transfer (CT) transition as evidenced from well defined CT absorption bands in the visible region of the electronic spectra. In our present case, the CT interaction may be claimed as one of the rare findings, especially on account of interaction between fullerenes and bisporphyrin in a non-polar solvent. Other than fullerenes C(60) and C(70), various other electron acceptors, viz., 2,3-dichloro-5,6-dicyano-p-benzoquinone, tetracyanoethylene, o-chloranil and p-chloranil form CT complexes with 1. Utilizing the CT transition energies for various electron donor-acceptor complexes of 1, vertical ionization potential (I(D)(v)) of 1 is determined to be 6.37 eV in solution. Estimation of degrees of CT, oscillator and transition dipole strengths evoke that the fullerene-1 non-covalent complexes are of neutral character in ground state. Higher magnitude of electronic coupling elements for the C(70)-1 complex compared to C(60)-1 complex indicates strong binding between C(70) and 1. Steady state fluorescence studies elicit efficient quenching of the fluorescence of 1 in presence of fullerenes. Both UV-Vis and steady state fluorescence measurements reveal large value of binding constant (K) for C(70)-1 system (∼6.94 × 10(4)dm(3)mol(-1)) than that of C(60)-1 system (K∼2.1 × 10(4)dm(3)mol(-1)). Time resolved emission studies establish charge-separated state for the fullerene-1 systems. Transient absorption measurements in the visible region establish the formation of 1(+) and fullerene(-) in toluene medium. Molecular mechanics calculations employing force field method in vacuo evoke the single projection structures of the fullerene-1 complexes and interpret the stability difference between C(60) and C(70) complexes of 1 in terms of heat of formation values of the respective complexes.
Collapse
Affiliation(s)
- Debabrata Pal
- Department of Chemistry, The University of Burdwan, Golapbag, Burdwan 713104, India
| | | | | |
Collapse
|
6
|
Chen P, Lau H, Habermeyer B, Gros CP, Barbe JM, Kadish KM. Electrochemistry, spectroelectrochemistry and catalytic activity of biscobalt bisporphyrin dyads towards dioxygen reduction. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424611003410] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Three face-to-face biscobalt bisporphyrin dyads, including one incorporating a copper(II) ion inside the linker, were synthesized and characterized both spectroscopically and electrochemically in three non-aqueous solvents, dichloromethane, benzonitrile and pyridine. The electrocatalytic reduction of dioxygen with these derivatives on an electrode surface in 1.0 M HClO4 was also investigated and the results are compared to that obtained with "regular" Pacman biscobalt bisporphyrins under the same experimental conditions. Surprisingly, the tris-metal species ( Cu-bisCo ) catalyzes the reduction of O2 mainly via a 2e- transfer process, leading to H2O2 , while the bis-metal (bisCo) catalyst produces H2O via a four electron, four proton process.
Collapse
Affiliation(s)
- Ping Chen
- Department of Chemistry, University of Houston, Houston, TX 77204-5003, USA
| | - Hoyi Lau
- Department of Chemistry, University of Houston, Houston, TX 77204-5003, USA
| | - Benoit Habermeyer
- Université de Bourgogne, ICMUB (UMR 5260), 9, Avenue Alain Savary, BP 47870, 21078 Dijon Cedex, France
| | - Claude P. Gros
- Université de Bourgogne, ICMUB (UMR 5260), 9, Avenue Alain Savary, BP 47870, 21078 Dijon Cedex, France
| | - Jean-Michel Barbe
- Université de Bourgogne, ICMUB (UMR 5260), 9, Avenue Alain Savary, BP 47870, 21078 Dijon Cedex, France
| | - Karl M. Kadish
- Department of Chemistry, University of Houston, Houston, TX 77204-5003, USA
| |
Collapse
|
7
|
Pal D, Bhattacharya S. Absorption spectrophotometric, fluorescence and theoretical investigations on supramolecular interaction of a designed bisporphyrin with C60 and C70. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 79:638-645. [PMID: 21530371 DOI: 10.1016/j.saa.2011.03.050] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2011] [Revised: 03/08/2011] [Accepted: 03/18/2011] [Indexed: 05/30/2023]
Abstract
The present article reports the spectroscopic and theoretical investigations on supramolecular interaction between fullerenes (C(60) and C(70)) and a designed bisporphyrin, namely 1, in toluene. Job's method of continuous variation establishes 1:1 stoichiometry of the fullerene/1 complexes. Both absorption spectrophotometric and steady-state fluorescence studies reveal effective and selective interaction between fullerenes and 1 as average binding constants (K) for the C(60)/1 and C(70)/1 complexes are enumerated to be 34,700 and 359,925 dm(3) mol(-1), respectively. Large selectivity ratio in K, i.e., K(C(70))/K(C(60)), indicates that 1 acts as an effective molecular tweezers for C(70) in solution. Time-resolved fluorescence study evokes that the quenching of fluorescence of 1 by fullerenes is of static type in nature. Molecular mechanics calculations in vacuo determine the energies and single projection structures of the supramolecular systems, which provide very good support in favor of strong binding between C(70) and 1.
Collapse
Affiliation(s)
- Debabrata Pal
- The Department of Chemistry, The University of Burdwan, Golapbag, Burdwan 713104, India
| | | |
Collapse
|