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The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
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Multiphotochromism in an Asymmetric Ruthenium Complex with Two Different Dithienylethenes
Jin-Xiang Chen1, Jin-Yun Wang1, Qian-Chong Zhang1
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , 155 Yangqiao Road West, Fuzhou 350002, China.
Inorganic Chemistry
|October 7, 2017
Summary
This study designed an asymmetric ruthenium(II) complex for multistate photochromism, achieving eight switchable states through stepwise photocyclization and redox processes. The research highlights tunable photochromic properties in advanced molecular materials.
Area of Science:
- Coordination Chemistry
- Materials Science
- Photochemistry
Background:
- Ruthenium(II) complexes are explored for photochromic applications.
- Dithienylethene-acetylides offer tunable photochromic properties.
- Multistate photochromism requires precise control over molecular transformations.
Purpose of the Study:
- To design and synthesize an asymmetric bis(dithienylethene-acetylide) ruthenium(II) complex (1oo).
- To investigate the multistate photochromism of complex 1 and its symmetric counterparts (2oo, 3oo).
- To explore the photochromic behavior of the oxidized species of these complexes.
Main Methods:
- Synthesis of asymmetric and symmetric ruthenium(II) complexes.
- Photochemical irradiation with controlled wavelengths for photocyclization and photocycloreversion.
- Spectroscopic, electrochemical, and computational analyses to characterize photochromic properties.
Main Results:
- Complex 1 exhibits stepwise photocyclization and selective photocycloreversion, yielding four distinct states.
- Symmetric complexes 2oo and 3oo were synthesized and their photochromic behaviors investigated.
- Both neutral and oxidized species show progressive changes in absorption bands with increasing photocyclization.
- Complex 1 demonstrated eight switchable states through combined photo- and redox-switching.
Conclusions:
- The asymmetric design enables precise control over multistate photochromism.
- Ruthenium(II) complexes with dithienylethene-acetylides are promising for advanced photochromic materials.
- Stepwise photocyclization, selective cycloreversion, and redox processes offer a versatile platform for molecular switching.
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