Sub-picosecond time resolved infrared spectroscopy of high-spin state formation in Fe(ii) spin crossover complexes

2008 ◽  
Vol 10 (29) ◽  
pp. 4264 ◽  
Author(s):  
Matthias M. N. Wolf ◽  
Ruth Groß ◽  
Christian Schumann ◽  
Juliusz A. Wolny ◽  
Volker Schünemann ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
State Formation ◽  
High Spin ◽  
Spin State ◽  
Spin Crossover ◽  
High Spin State ◽  
Time Resolved ◽  
Spin Crossover Complexes ◽  
Time Resolved Infrared Spectroscopy

Magnetic fluorescent bifunctional spin-crossover complexes

2016 ◽  
Vol 45 (46) ◽  
pp. 18552-18558 ◽  
Author(s):  
Jun-Li Wang ◽  
Qiang Liu ◽  
Xiao-Jin Lv ◽  
Rui-Lin Wang ◽  
Chun-Ying Duan ◽  
...  
Keyword(s):  
High Spin ◽  
Spin State ◽  
Spin Crossover ◽  
Fluorescence Emission ◽  
High Spin State ◽  
Spin Crossover Complexes

Bifunctional fluorescent spin crossover complexes exhibit thermally and light induced conversion from the low spin to the high spin state, as well as fluorescence emission.

Modeling of Surface and Size Effects on Various Shape of Spin-Crossover Nanoparticles

2014 ◽  
Vol 793 ◽  
pp. 77-83
Author(s):  
Azusa Muraoka ◽  
Kamel Boukheddaden
Keyword(s):  
High Spin ◽  
Spin State ◽  
Spin Crossover ◽  
Surface Effect ◽  
High Spin State ◽  
Coordination Shell ◽  
Square Lattice ◽  
Rectangular Lattice ◽  
Ligand Field ◽  
Effect Of Surface

We performed of Monte Carlo simulations using Ising-like model on two-dimensional core/shell rectangular lattice L×2L for different sizes in order to study the effect of surface and size on the thermal behavior of spin-crossover nanoparticles. The surface effect is accounted for by constraining all the atoms situated in the boundary in the high-spin state as a result of the weak ligand-field prevailing in the coordination shell. This result is similar to square lattice of spin-crossover nanoparticles, and in agreement with experimental data. Such a non-trivial change is explained as due to the competition between the negative pressures induced the high spin state surface and the bulk properties. We also described the way in which the usual occurrence condition of the first-order transition has to be adapted to the nanoscale.

Non-linear Relaxation of the Photo-induced High Spin State in Spin-Crossover Solids: Effect of Correlations

2002 ◽  
Vol 75 (7-8) ◽  
pp. 733-741 ◽  
Author(s):  
K. Boukheddaden ◽  
F. Varret ◽  
S. Salunke ◽  
J. Linares ◽  
E. Codjovi
Keyword(s):  
High Spin ◽  
Spin State ◽  
Spin Crossover ◽  
High Spin State ◽  
Linear Relaxation ◽  
Non Linear

Photochemical or electrochemical bond breaking – exploring the chemistry of (μ2-alkyne)Co2(CO)6 complexes using time-resolved infrared spectroscopy, spectro-electrochemical and density functional methods

2019 ◽  
Vol 48 (39) ◽  
pp. 14642-14652
Author(s):  
Jennifer C. Manton ◽  
Florian J. R. Cerpentier ◽  
Emma C. Harvey ◽  
Ian P. Clark ◽  
Gregory M. Greetham ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
High Spin ◽  
Density Functional ◽  
Bond Breaking ◽  
Time Resolved ◽  
Density Functional Methods ◽  
Functional Methods ◽  
Time Resolved Infrared Spectroscopy

The photoassisted Pauson–Khand reaction involves the formation of a high-spin diradical species and not CO loss as previously thought.

Polymorphism of a chiral iron(ii) complex: spin-crossover and ferroelectric properties

2017 ◽  
Vol 46 (25) ◽  
pp. 8004-8008 ◽  
Author(s):  
Wang-Kang Han ◽  
Long-Fang Qin ◽  
Chun-Yan Pang ◽  
Cai-Kun Cheng ◽  
Wei Zhu ◽  
...  
Keyword(s):  
High Spin ◽  
Spin State ◽  
Spin Crossover ◽  
Ferroelectric Properties ◽  
High Spin State ◽  
The Other ◽  
Complex Spin

A chiral iron(ii) complex with two polymorphs, one that undergoes a gradual spin crossover, whilst the other remains in a high-spin state but shows a typical ferroelectric feature, is reported.

Steric Trapping of the High Spin State in FeIII Quinolylsalicylaldimine Complexes

2014 ◽  
Vol 67 (11) ◽  
pp. 1574 ◽  
Author(s):  
Darunee Sertphon ◽  
David J. Harding ◽  
Phimphaka Harding ◽  
Keith S. Murray ◽  
Boujemaa Moubaraki ◽  
...  
Keyword(s):  
Schiff Base ◽  
Electronic Properties ◽  
High Spin ◽  
Spin State ◽  
Schiff Base Ligand ◽  
Room Temperature ◽  
Spin Crossover ◽  
High Spin State ◽  
Electrochemical Studies ◽  
Magnetic Studies

A new sterically bulky Schiff base ligand, N-(8-quinolyl)-5-tert-butylsalicylaldimine (Hqsal-5-tBu) has been prepared and a series of FeIII complexes, [Fe(qsal-5-tBu)2]Y (Y = Cl 1, ClO4 2, NO3 3, BF4 4) utilising this ligand are reported and fully characterised. UV-vis spectroscopic and electrochemical studies indicate that 1–4 are high spin (HS) in solution at room temperature and further suggest that the tBu group only slightly alters the electronic properties of 1–4 compared with related [Fe(qsal-5-X)2]+ systems. The structures of [Fe(qsal-5-tBu)2]Cl·4MeOH·H2O 1, [Fe(qsal-5-tBu)2]ClO4·MeOH 2, and [Fe(qsal-5-tBu)2]NO3 3 determined at 100 K reveal HS FeIII centres in all cases. Four-fold parallel aryl embraces and π–π interactions serve to link the cations forming 2D sheets mirroring the motifs found in other [Fe(qsal-5-X)2]+ complexes. Despite this the tBu group causes strong distortions at the Fe centre which as magnetic studies reveal prevent spin crossover trapping 1–4 in the HS state.

The integrated spintronic functionalities of an individual high-spin state spin-crossover molecule between graphene nanoribbon electrodes

2015 ◽  
Vol 26 (31) ◽  
pp. 315201 ◽  
Author(s):  
L Zhu ◽  
F Zou ◽  
J H Gao ◽  
Y S Fu ◽  
G Y Gao ◽  
...  
Keyword(s):  
High Spin ◽  
Spin State ◽  
Spin Crossover ◽  
High Spin State ◽  
Graphene Nanoribbon ◽  
State Spin

scholarly journals Designed intramolecular blocking of the spin crossover of an Fe(ii) complex

2016 ◽  
Vol 45 (36) ◽  
pp. 14058-14062 ◽  
Author(s):  
C. Bartual-Murgui ◽  
S. Vela ◽  
O. Roubeau ◽  
G. Aromí
Keyword(s):  
High Spin ◽  
Spin State ◽  
Spin Crossover ◽  
High Spin State ◽  
Intramolecular Interactions

Ligand intramolecular interactions trap an Fe(ii) complex in the high spin state, in a case of thermodynamic trapping rather than kinetic.

Photoexcitation and Relaxation Properties of a Spin-Crossover Solid in the Case of a Stable High-Spin State

2006 ◽  
Vol 110 (12) ◽  
pp. 5883-5888 ◽  
Author(s):  
Cristian Enachescu ◽  
François Varret ◽  
Epiphane Codjovi ◽  
Jorge Linarès ◽  
Sébastien Floquet ◽  
...  
Keyword(s):  
High Spin ◽  
Spin State ◽  
Spin Crossover ◽  
High Spin State ◽  
Relaxation Properties

scholarly journals Determination of the molecular structure of the short-lived light-induced high-spin state in the spin-crossover compound [Fe(6-mepy)3tren](PF6)2

2013 ◽  
Vol 87 (21) ◽  
Author(s):  
Pradip Chakraborty ◽  
Antoine Tissot ◽  
Lisa Peterhans ◽  
Laure Guénée ◽  
Céline Besnard ◽  
...  
Keyword(s):  
Molecular Structure ◽  
High Spin ◽  
Spin State ◽  
Spin Crossover ◽  
High Spin State
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