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Abuhafez N, Gramage-Doria R. Boosting the activity of Mizoroki-Heck cross-coupling reactions with a supramolecular palladium catalyst favouring remote Zn⋯pyridine interactions. Faraday Discuss 2023; 244:186-198. [PMID: 37083293 DOI: 10.1039/d2fd00165a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Transition metal catalysis benefitting from supramolecular interactions in the secondary coordination sphere in order to pre-organize substrates around the active site and reach a specific selectivity typically occurs under long reaction times and mild reaction temperatures with the aim to maximize such subtle effects. Herein, we demonstrate that the kinetically labile Zn⋯N interaction between a pyridine substrate and a zinc-porphyrin site serving for substrate binding is a unique type of weak interaction that enables identification of supramolecular effects in transition metal catalysis after one hour at a high reaction temperature of 130 °C. Under carefully selected reaction conditions, supramolecularly-regulated palladium-catalyzed Mizoroki-Heck reactions between 3-bromopyridine and terminal olefins (acrylates or styrenes) proceeded in a more efficient manner compared to the non-supramolecular version. The supramolecular catalysis developed here also displayed interesting substrate-selectivity patterns.
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Affiliation(s)
- Naba Abuhafez
- Univ Rennes, CNRS, ISCR-UMR6226, F-35000 Rennes, France.
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2
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Photo-induced energy and electron transfer in carboxylic acid functionalized bis(4′-tert-butylbiphenyl-4-yl)aniline (BBA)-substituted A3B zinc porphyrins. J CHEM SCI 2021. [DOI: 10.1007/s12039-021-01958-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Sakakibara K, Tomida K, Nakagawa T, Yagyu T, Takagi HD, Inamo M. Intramolecular photoinduced electron transfer reactions of zinc(II) porphyrin dyads studied with a sub-ns time resolution. J PORPHYR PHTHALOCYA 2020. [DOI: 10.1142/s1088424620500224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We report the dynamics of a intramolecular photoinduced electron transfer reaction of Zn(II)-porphyrin dyads that have a 2,2[Formula: see text]-bipyridine moiety at the periphery in the presence of Cu[Formula: see text] in methanol studied using laser flash photolysis with a sub-nanosecond time resolution. The photoinduced electron transfer reactions were observed from the excited [Formula: see text] and [Formula: see text] states of the Zn(II)-porphyrin to the Cu(II)-2,2[Formula: see text]-bipyridine moiety, and the structural dependence of the reactivity were discussed in terms of the distance between the electron donating and accepting centers.
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Affiliation(s)
- Kei Sakakibara
- Department of Chemistry, Aichi University of Education, Igaya, Kariya 448-8542, Japan
| | - Kenta Tomida
- Department of Chemistry, Aichi University of Education, Igaya, Kariya 448-8542, Japan
| | | | - Takeyoshi Yagyu
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Showa, Nagoya 466-8555, Japan
| | - Hideo D. Takagi
- Research Center for Materials Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Masahiko Inamo
- Department of Chemistry, Aichi University of Education, Igaya, Kariya 448-8542, Japan
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Mrinalini M, Pathak SS, Achary BS, Panchakarla LS, Prasanthkumar S. Voltage Stimulated Anion Binding of Metalloporphyrin-induced Crystalline 2D Nanoflakes. Chem Asian J 2019; 14:537-541. [PMID: 30632278 DOI: 10.1002/asia.201801794] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 01/04/2019] [Indexed: 12/22/2022]
Abstract
Voltage-stimulated redox-active materials have received significant attention in the field of organic electronics and sensor technology. Such stimuli-responsive materials trigger the formation of crystalline nanostructures and facilitate the design of efficient smart devices hitherto unknown. Herein, we report that free-base and metallo-tetratolylporphyrin-linked ferrocene derivatives (H2 TTP-Fc and ZnTTP-Fc) undergo distinct proton/anion binding mechanism in CHCl3 during bulk electrolysis at applied voltage of 1.4 V to give [H4 TTP-Fc]+ Cl- and H+ [(Cl)ZnTTP-Fc]- followed by nanospheres and crystalline 2D nanoflakes formation, confirmed by SEM and TEM images, by methanol vapor diffusion (MVD) approach. Moreover, X-ray diffraction analysis suggest that protonated H2 TTP-Fc aggregates exhibit amorphous nature, whereas H+ [(Cl)ZnTTP-Fc]- depict crystalline nature from layer-by-layer arrangement of nanoflakes assisted by π-π stacking and ion-dipole interactions.
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Affiliation(s)
- Madoori Mrinalini
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-, 500007, Telangana, India.,Academy of Scientific and Innovation Research (AcSIR), New Delhi, India
| | - Sushil Swaroop Pathak
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-, 400076, Maharastra, India
| | - B Shivaprasad Achary
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-, 500007, Telangana, India
| | - Leela S Panchakarla
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-, 400076, Maharastra, India
| | - Seelam Prasanthkumar
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-, 500007, Telangana, India.,Academy of Scientific and Innovation Research (AcSIR), New Delhi, India
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Achary BS, Ramya AR, Trivedi R, Bangal PR, Giribabu L. Synthesis, characterization and photophysical properties of ferrocenyl and mixed sandwich cobaltocenyl ester linked meso-triaryl corrole dyads. J PORPHYR PHTHALOCYA 2017. [DOI: 10.1142/s1088424617500614] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We report here the design and synthesis of corrole-metallocene dyads consisting of a metallocene (either ferrocene (Dyad 1) or mixed sandwich [Formula: see text]-[C[Formula: see text]H[Formula: see text](COOH)]Co([Formula: see text]-C[Formula: see text]Ph[Formula: see text] (Dyad 2)) connected via an ester linkage at meso phenyl position. Both the dyads were characterized by [Formula: see text]H NMR, MALDI-TOF, UV-visible, fluorescence spectroscopies (steady-state, picosecond time-resolved), femtosecond transient absorption spectroscopy (fs-TA) and electrochemical methods. The absorption spectra of these dyads showed slight broadening and splitting of the Soret band that indicates a weak ground state interaction between the corrole macrocycle and metallocene part of the present donor–acceptor (D–A) system. However, in both the dyad systems, fluorescence emission of the corrole was quenched in polar solvents as compared to its parent compound 10-(4-hydroxyphenyl)-5,15-bis-(pentafluorophenyl ) corrole (Ph-Corr). The quenching was more pronounced in ferrocene derivatives than in cobaltocenyl derivatives. Transient absorption studies confirm the absence of photoinduced electron transfer from metallocene to correl for these dyad systems and the quenching of singlet state of corrole is found to enhance intersystem crossing due to heavy atom effect.
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Affiliation(s)
- B. Shivaprasad Achary
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
| | - A. R. Ramya
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
| | - Rajiv Trivedi
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
| | - P. R. Bangal
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
| | - L. Giribabu
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
- Academy of Scientific and Innovative Research, CSIR-Indian Institute of Chemical Technology, India
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Mrinalini M, Vamsi Krishna N, Krishna JVS, Prasanthkumar S, Giribabu L. Light induced oxidation of an indoline derived system triggered spherical aggregates. Phys Chem Chem Phys 2017; 19:26535-26539. [PMID: 28960002 DOI: 10.1039/c7cp04988a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Indoline based donor-acceptor system (InBT) exhibits a colour transition from pink to orange to yellow in chloroform facilitated by the photo-oxidation of the N,N-dimethyl indoline of InBT and neutralized by chloride counter ions upon light irradiation at short and long range excitation wavelengths of 320 and 500 nm, which leads to spherical aggregates when subjected to methanol vapour diffusion (MVD).
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Affiliation(s)
- Madoori Mrinalini
- Inorganic & Physical Chemistry Division CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad, 500007, Telangana, India.
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Sakakibara K, Nagino S, Akanuma H, Tsukada Y, Nakano H, Yagyu T, Takagi HD, Inamo M. Structure dependence of intramolecular electron transfer reactions of simple dyads of a zinc(ii) porphyrin complex bearing a peripheral bipyridine moiety. Dalton Trans 2017; 46:12645-12654. [DOI: 10.1039/c7dt02674a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoinduced intramolecular electron transfer and charge recombination reactions were investigated using various Zn(ii)-porphyrin dyads having a 2,2′-bipyridine moiety.
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Affiliation(s)
- Kei Sakakibara
- Department of Chemistry
- Aichi University of Education
- Igaya
- Japan
| | - Shou Nagino
- Department of Chemistry
- Aichi University of Education
- Igaya
- Japan
| | - Hajime Akanuma
- Department of Chemistry
- Aichi University of Education
- Igaya
- Japan
| | - Yuki Tsukada
- Department of Chemistry
- Aichi University of Education
- Igaya
- Japan
| | - Hirofumi Nakano
- Department of Chemistry
- Aichi University of Education
- Igaya
- Japan
| | - Takeyoshi Yagyu
- Department of Materials Science and Engineering
- Graduate School of Engineering
- Nagoya Institute of Technology
- Showa
- Japan
| | - Hideo D. Takagi
- Research Centre for Materials Science
- Nagoya University
- Chikusa
- Japan
| | - Masahiko Inamo
- Department of Chemistry
- Aichi University of Education
- Igaya
- Japan
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Jain K, Duvva N, Badgurjar D, Giribabu L, Chitta R. Synthesis and spectroscopic studies of axially bound tetra(phenothiazinyl)/tetra(bis(4′-tert-butylbiphenyl-4-yl)aniline)-zinc(II)porphyrin-fullero[C60 & C70]pyrrolidine donor–acceptor triads. INORG CHEM COMMUN 2016. [DOI: 10.1016/j.inoche.2016.01.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Duvva N, Sudhakar K, Badgurjar D, Chitta R, Giribabu L. Spacer controlled photo-induced intramolecular electron transfer in a series of phenothiazine-boron dipyrromethene donor–acceptor dyads. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2015.07.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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