A Guideline to the Design of Molecular‐Based Materials with Long‐Lived Photomagnetic Lifetimes
- 25 July 2005
- journal article
- concept
- Published by Wiley in Chemistry – A European Journal
- Vol. 11 (16), 4582-4589
- https://doi.org/10.1002/chem.200500112
Abstract
Materials presenting a stable and reversible switch of physical properties in the solid state are of major interest either for fundamental interests or potential industrial applications. In this context, the design of metal complexes showing a light-induced crossover from one spin state to another, leading to a major change of magnetic and optical properties, is probably one of the most appealing challenges. The so-denoted spin-crossover materials undergo, in some cases, a reversible photoswitch between two magnetic states, but, unfortunately, lifetimes of the photomagnetic states for compounds known so far are long enough only at low temperatures; this prohibits any applications. We have measured and collected the temperatures above which the photomagnetic effect disappears for more than sixty spin-crossover compounds. On the basis of this large data base, a correlation between the nature of the coordination sphere of the metal and the photomagnetic lifetime can be drawn. Such correlation allows us to propose here a general guideline for the rational design of materials with long-lived photomagnetic lifetimes. This result clearly opens the way towards room-temperature photonic materials, based on the spin-crossover phenomenon, which will be of great interest for future communication devices.Keywords
This publication has 38 references indexed in Scilit:
- A Novel LIESST Iron(II) Complex Exhibiting a High Relaxation TemperatureInorganic Chemistry, 2001
- Electronics using hybrid-molecular and mono-molecular devicesNature, 2000
- Strong Field Iron(II) Complex Converted by Light into a Long-Lived High-Spin StateAngewandte Chemie-International Edition, 2000
- Stark-Feld-Eisen(II)-Komplex konvertiert durch Licht in einen langlebigen High-Spin-ZustandAngewandte Chemie, 2000
- LIESST Effect Studies of Iron(II) Spin-Crossover Complexes with Phosphine Ligands: Relaxation Kinetics and Effects of Solvent MoleculesInorganic Chemistry, 1997
- High‐Spin → Low‐Spin Relaxation in [Fe(bpp)2](CF3SO3)2 H2O after LIESST and Thermal Spin‐State Trapping—Dynamics of Spin Transition Versus Dynamics of Phase TransitionChemistry – A European Journal, 1996
- Non-First-Order Kinetics of the High Spin-Low Spin Relaxation in [Fe(bpp)2](BF4)2 after LIESST and Thermal Spin TrappingInorganic Chemistry, 1994
- High-spin .fwdarw. low-spin relaxation kinetics and cooperative effects in the hexakis(1-propyltetrazole)iron bis(tetrafluoroborate) and [Zn1-xFex(ptz)6](BF4)2(ptz = 1-propyltetrazole) spin-crossover systemsInorganic Chemistry, 1986
- Light-induced excited spin state trapping in a transition-metal complex: The hexa-1-propyltetrazole-iron (II) tetrafluoroborate spin-crossover systemChemical Physics Letters, 1984
- Photochemically-induced perturbation of the1A ⇌5T equilibrium in Fe11complexes by pulsed laser irradiation in the metal-to-ligand charge-transfer absorption bandJournal of the Chemical Society, Chemical Communications, 1982