Square-Planar Ruthenium(II) Complexes: Control of Spin State by Pincer Ligand Functionalization

2014 ◽  
Vol 21 (2) ◽  
pp. 579-589 ◽  
Author(s):  
Bjorn Askevold ◽  
Marat M. Khusniyarov ◽  
Wolfgang Kroener ◽  
Klaus Gieb ◽  
Paul Müller ◽  
...  
Keyword(s):  
Spin State ◽  
Pincer Ligand ◽  
Square Planar

Inside Cover: Square-Planar Ruthenium(II) Complexes: Control of Spin State by Pincer Ligand Functionalization (Chem. Eur. J. 2/2015)

2015 ◽  
Vol 21 (2) ◽  
pp. 474-474
Author(s):  
Bjorn Askevold ◽  
Marat M. Khusniyarov ◽  
Wolfgang Kroener ◽  
Klaus Gieb ◽  
Paul Müller ◽  
...  
Keyword(s):  
Spin State ◽  
Pincer Ligand ◽  
Square Planar

scholarly journals Synthesis, Structure and In Vitro Anticancer Activity of Pd(II) Complex of Pyrazolyl-s-Triazine Ligand; A New Example of Metal-Mediated Hydrolysis of s-Triazine Pincer Ligand

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 119
Author(s):  
Jamal Lasri ◽  
Matti Haukka ◽  
Hessa H. Al-Rasheed ◽  
Nael Abutaha ◽  
Ayman El-Faham ◽  
...  
Keyword(s):  
Thermal Conditions ◽  
Molar Ratio ◽  
Chloride Salt ◽  
Pincer Ligand ◽  
Hydrogen Bonding Interactions ◽  
Square Planar ◽  
Hirshfeld Analysis ◽  
Hydrolysis Of ◽  
Mcf 7

The square planar complex [Pd(PT)Cl(H2O)]*H2O (HPT: 6-(3,5-dimethyl-1H-pyrazol-1-yl)-1,3,5-triazine-2,4(1H,3H)-dione) was obtained by the reaction of 2-methoxy-4,6-bis(3,5-dimethyl-1H-pyrazol-1-yl)-1,3,5-triazine (MBPT) pincer ligand with PdCl2 in a molar ratio (1:1) under thermal conditions and using acetone as a solvent. The reaction proceeded via C-N cleavage of one C-N moiety that connects the pyrazole and s-triazine combined with the hydrolysis of the O-CH3 group. The reaction of the chloride salt of its higher congener (PtCl2) gave [Pt(3,5-dimethyl-1H-pyrazole)2Cl2]. The crystal structure of [Pd(PT)Cl(H2O)]*H2O complex is stabilized by inter- and intra-molecular hydrogen bonding interactions. Hirshfeld analysis revealed that the H...H (34.6%), O...H (23.6%), and Cl...H (7.8%) interactions are the major contacts in the crystal. The charges at Pd, H2O, Cl and PT are changed to 0.4995, 0.2216, −0.4294 and −0.2917 instead of +2, 0, −1 and −1, respectively, using the MPW1PW91 method. [Pd(PT)Cl(H2O)]*H2O complex has almost equal activities against MDA-MB-231 and MCF-7 cell lines with IC50 of 38.3 µg/mL.

Square-Planar Iridium(II) and Iridium(III) Amido Complexes Stabilized by a PNP Pincer Ligand

2011 ◽  
Vol 50 (35) ◽  
pp. 8184-8187 ◽  
Author(s):  
Jenni Meiners ◽  
Markus G. Scheibel ◽  
Marie-Hélène Lemée-Cailleau ◽  
Sax A. Mason ◽  
M. Bele Boeddinghaus ◽  
...  
Keyword(s):  
Pincer Ligand ◽  
Amido Complexes ◽  
Square Planar

A Two-in-one Pincer Ligand and its Diiron(II) Complex Showing Spin State Switching in Solution through Reversible Ligand Exchange

2014 ◽  
Vol 127 (2) ◽  
pp. 593-597 ◽  
Author(s):  
Subhas Samanta ◽  
Serhiy Demesko ◽  
Sebastian Dechert ◽  
Franc Meyer
Keyword(s):  
Spin State ◽  
Ligand Exchange ◽  
Pincer Ligand ◽  
State Switching

Synthesis and Electronic Structure of Neutral Square-Planar High-Spin Iron(II) Complexes Supported by a Dianionic Pincer Ligand

2019 ◽  
Vol 58 (2) ◽  
pp. 1252-1266 ◽  
Author(s):  
Brett M. Hakey ◽  
Jonathan M. Darmon ◽  
Yu Zhang ◽  
Jeffrey L. Petersen ◽  
Carsten Milsmann
Keyword(s):  
Electronic Structure ◽  
High Spin ◽  
Pincer Ligand ◽  
Square Planar ◽  
High Spin Iron

scholarly journals Room-Temperature Switching of Spin-State in Single-Molecule Junctions

2020 ◽  
Author(s):  
Jing Li ◽  
QingQing Wu ◽  
Wei Xu ◽  
Hai-Chuan Wang ◽  
Hewei Zhang ◽  
...  
Keyword(s):  
Spin State ◽  
Single Molecule ◽  
Room Temperature ◽  
High Spin State ◽  
Scanning Tunneling ◽  
Molecular Spintronics ◽  
State Switching ◽  
Square Planar ◽  
Single Molecule Junctions ◽  
Conductance Changes

Abstract The emerging of molecular spintronics offers a unique chance for the design of molecular devices with different spin-state, and the control of spin-state becomes essential for molecular spin switches. However, the intrinsic spin switching from low-spin to high-spin state is a temperature-dependent process with a small energy barrier that low temperature is required to maintain the low-spin state, and thus the room-temperature operation of single-molecule devices have not yet been achieved. Here, we investigated the single-molecule charge transport through a diamagnetic square planar nickel(II) porphyrin using the scanning tunneling microscope break-junction (STM-BJ) technique. The reversible single-molecule conductance switches are demonstrated by utilizing a coordination-induced spin-state switching to manipulate the spin state between S = 0 and S = 1 at room temperature. Furthermore, the different coordinated complexes could be distinguished from the conductance traces, which cannot be realized by the ensemble investigations such as NMR and UV-vis spectrums. The combined DFT calculations revealed that the conductance changes come from the different spin-states of the molecules varying the number of coordination ligands, suggesting coordination-induced spin-state switching provides a new way towards room-temperature molecular spintronics.

scholarly journals A high-spin square-planar Fe(ii) complex stabilized by a trianionic pincer-type ligand and conclusive evidence for retention of geometry and spin state in solution

2015 ◽  
Vol 6 (1) ◽  
pp. 608-612 ◽  
Author(s):  
M. E. Pascualini ◽  
N. V. Di Russo ◽  
A. E. Thuijs ◽  
A. Ozarowski ◽  
S. A. Stoian ◽  
...  
Keyword(s):  
High Spin ◽  
Spin State ◽  
Conclusive Evidence ◽  
Planar Geometry ◽  
Square Planar

Extensive spectroscopic evaluation of a novel ONO3− trianionic pincer Fe(ii) complex indicates the rare square-planar geometry and S = 2 spin state are retained in solution.

Coordinatively- and electronically-unsaturated square planar cobalt(iii) complexes of a pyridine dianionic pincer ligand

2017 ◽  
Vol 46 (46) ◽  
pp. 16228-16235 ◽  
Author(s):  
Faidh Hana ◽  
Alan J. Lough ◽  
Gino G. Lavoie
Keyword(s):  
Cobalt Hydroxide ◽  
Pincer Ligand ◽  
Square Planar

Coordinatively- and electronically-unsaturated cobalt(iii) complexes supported by a dianionic ligand were studied, resulting in the first structurally-characterized square-planar cobalt hydroxide complex.

Single molecule magnet behaviour in a square planar S = 1/2 Co(ii) complex and spin-state assignment of multiple relaxation modes

2020 ◽  
Vol 56 (49) ◽  
pp. 6711-6714
Author(s):  
Indrani Bhowmick ◽  
David W. Shaffer ◽  
Jenny Y. Yang ◽  
Matthew P. Shores
Keyword(s):  
Spin State ◽  
Single Molecule ◽  
Spin Crossover ◽  
Single Molecule Magnet ◽  
State Assignment ◽  
Square Planar ◽  
Relaxation Modes

First reports of a square planar S = 1/2 Co(ii) single molecule magnet, and spin state assignment to the multiple relaxation modes of a structurally related spin crossover Co(ii) complex.

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