A Magnesium Porphyrin Bicarbonate Complex with CO<sub>2</sub>‐Modulated Photosystem I Action

Bhuyan, Jagannath; Sarkar, Rudra; Sarkar, Sabyasachi

doi:10.1002/anie.201103876

Cited by 24 publications

(10 citation statements)

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“…The Cambridge Structural Database (CSD, version 5.35)5 contains the molecular structures of just 33 Mg–porphyrin complexes, and most of the published Mg–porphyrins are tetravalent magnesium derivatives [Mg(Porph)] (Porph = porphyrinato) or five‐coordinate and six‐coordinate magnesium metalloporphyrins [Mg(Porph)L] and [Mg(Porph)L 2 ], in which L is a neutral ligand. Only two pentacoordinate magnesium(II) porphyrin derivatives with anionic ligands have been reported: [Mg(TPP)(HCO 3 )] – (TPP = tetraphenylporphyrinato)6 and [Mg(OEP)(OClO 3 )] – (OEP = octaethylporphyrin dianion),7 and no structure of a magnesium azide complex has been reported.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Effects of Axial Pseudohalide Ligands on the Photophysical and Cyclic Voltammetry Properties and Molecular Structures of Mg^II Tetraphenyl/porphyrin Complexes

et al. 2014

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The (meso-tetraphenylporphyrinato)magnesium(II) complexes with azido (1), cyanato-N (2), and thiocyanato-N (3) ligands were prepared by using 2.2.2-cryptand to solubilize the azide, cyanato, and thiocyanato salts in dichloromethane solvent. These species were characterized by UV/Vis and IR spectroscopy, mass spectrometry, and electrochemistry. The first reduction potential and the two first oxidation potentials of the porphyrin rings of these species are not affected by the nature of the axial ligand, and an unusual third irreversible oxidation of the porphyrin ring is observed. The anodic behavior of the magnesium azide derivative is complicated by the appearance of additional signals for ligand-centered electron transfers that originate from the release of the azido ligand of 1. The room-temperature fluorescence spectra of the magnesium complexes 1-3 indicate that the Soret and Q bands are not particularly affected by the nature of the axial ligands. The quantum yields of the S 1 ǞS 0 fluorescence are between 0.10 and 0.19, and the fluorescence lifetimes range between 3.7 and 6.1 ns at room temperature. Complexes 1-3 crystallize in the monoclinic crystal system in the same space

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Section: Introductionmentioning

confidence: 99%

Exploring the Effects of Axial Pseudohalide Ligands on the Photophysical and Cyclic Voltammetry Properties and Molecular Structures of Mg^II Tetraphenyl/porphyrin Complexes

et al. 2014

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“…[143][144][145] Magnesium tetraphenylporphyrin, upon treatment with [Bu 4 N]OH under a CO 2 atmosphere, has been reported to form its bicarbonate adduct. 146 Several magnesium phthalocyanines containing four 1,1 0 -binaphthol substituents at peripheral and nonperipheral positions have been reported 147 as have two complexes of magnesium phthalocyanine with dioxane. 148 Magnesium derivatives containing pyrrolyl or ketiminato ligands have been synthesised and applied in the ROP of caprolactone.…”

Section: Group 15 Donorsmentioning

confidence: 99%

Alkaline and alkaline earth metals

Hill

2012

Annu. Rep. Prog. Chem., Sect. A: Inorg. Chem.

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Advances made during the calendar year 2011 relating to the coordination and inorganic chemistry of the elements of Groups 1 and 2 are summarised in this non-critical review. Coverage concentrates on topics centred around the synthesis, and applications of coordination and organometallic compounds of these elements. HighlightsThe isolation and reaction chemistry of kinetically-stabilised Group 2 species in which the alkaline earth centre exists in a formal +1 oxidation state has received intense international attention while interest in the potential of alkaline earth complexes as benign and inexpensive reagents for catalysis has continued to develop. LithiumA review of the resting-state structures of organocuprates determined using X-ray crystallography has appeared. 1 The electronic stability of s-block benzylates and di-and tri-phenylmethanide derivatives has been reviewed. 2 Reactions of the lithium boryl LiB(DippNCHQCHNDipp) with organohalides (RX) giving RB(DippNCHQCHNDipp) have been studied using DFT calculations. 3 Group 14 donor ligands An X-ray diffraction analysis of tetrareduced corannulene, C 20 H 10 4À , has confirmed the formation of a sandwich-type supramolecular aggregate in which five Li + ions are sandwiched between the two tetrareduced corannulene decks. 4 A combined experimental and DFT study has predicted that benzyl anions with strong p-withdrawing groups in the meta position have low energy diradical or triplet electronic states. 5 A lithium complex of an abnormal carbene with the composition [H 3 BC{{N(2, Pr 2 )C 6 H 3 } 2 )CHCLi(THF) 3 }] has been synthesised by lithiation of the NHC borane adduct. 6 Diastereomeric oxazolinylaziridines (R,R)-9 and (R,S)-9 have been regioselectively lithiated at the a-position with respect to the oxazolinyl ring. 7 Computational studies of the carbolithiation of b-methylstyrene with

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“…It was shown that the properties of the nanostructures, in particular the rate of energy transfer between adjacent molecules, are strongly affected by the structure of the ensemble. This makes them promising for the conversion of solar energy into chemical or electrical energy in, e.g., photocatalytic applications, sensors, and organic photovoltaics. − …”

Section: Introductionmentioning

confidence: 99%

Magnesium Porphine Supermolecules and Two-Dimensional Nanoaggregates Formed Using the Langmuir–Schaefer Technique

et al. 2018

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Porphyrins are functional elements of important biomolecules, whose assemblies play a central role in fundamental processes such as electron transfer, oxygen transport, enzymatic catalysis, and light harvesting. Here we report an approach to formation of porphyrin supermolecules, a particular type of nanoparticles with unusually strong noncovalent intermolecular interactions. Key differences between the supermolecules and noncovalent nanostructures described earlier are as follows. (1) Supermolecules consist of molecules of the same type without side groups promoting the self-assembly and without any spacers; no surfactant or catalyst to assist the process is needed. (2) They exhibit unusual photophysical properties and remain stable even in organic solvents. Their formation occurs under specially selected conditions at the air-water interface at room temperature. Following this route, we have formed supermolecules of magnesium porphine, a functional element of chlorophyll. The properties of these supermolecules are markedly different from those of the constituent molecules. For example, in contrast to the pink color of the monomer solution, solutions of supermolecules are transparent for visible light and absorb in the ultraviolet and near-infrared regions. We also present atomic force microscopy visualization of the porphyrin two-dimensional nanoaggregates forming at the air-water interface that were predicted in our previous works. This approach offers a guideline for the discovery of new supermolecules, including complex biological ones, and the formation of supermolecular materials with novel properties.

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A Magnesium Porphyrin Bicarbonate Complex with CO₂‐Modulated Photosystem I Action

Cited by 24 publications

References 23 publications

Exploring the Effects of Axial Pseudohalide Ligands on the Photophysical and Cyclic Voltammetry Properties and Molecular Structures of Mg^II Tetraphenyl/porphyrin Complexes

Exploring the Effects of Axial Pseudohalide Ligands on the Photophysical and Cyclic Voltammetry Properties and Molecular Structures of Mg^II Tetraphenyl/porphyrin Complexes

Alkaline and alkaline earth metals

Magnesium Porphine Supermolecules and Two-Dimensional Nanoaggregates Formed Using the Langmuir–Schaefer Technique

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A Magnesium Porphyrin Bicarbonate Complex with CO2‐Modulated Photosystem I Action

Cited by 24 publications

References 23 publications

Exploring the Effects of Axial Pseudohalide Ligands on the Photophysical and Cyclic Voltammetry Properties and Molecular Structures of MgII Tetraphenyl/porphyrin Complexes

Exploring the Effects of Axial Pseudohalide Ligands on the Photophysical and Cyclic Voltammetry Properties and Molecular Structures of MgII Tetraphenyl/porphyrin Complexes

Alkaline and alkaline earth metals

Magnesium Porphine Supermolecules and Two-Dimensional Nanoaggregates Formed Using the Langmuir–Schaefer Technique

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A Magnesium Porphyrin Bicarbonate Complex with CO₂‐Modulated Photosystem I Action

Exploring the Effects of Axial Pseudohalide Ligands on the Photophysical and Cyclic Voltammetry Properties and Molecular Structures of Mg^II Tetraphenyl/porphyrin Complexes

Exploring the Effects of Axial Pseudohalide Ligands on the Photophysical and Cyclic Voltammetry Properties and Molecular Structures of Mg^II Tetraphenyl/porphyrin Complexes