2009
DOI: 10.1002/ange.200903553
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Two‐Color Reversible Switching in a Photochromic Ruthenium Sulfoxide Complex

Abstract: Reversible, external triggering of molecules between two ground states is central to the operation of modern molecular machines. [1][2][3] A desirable trigger is light, as it provides an ample amount of energy in a short burst of time. Although light is commonly employed for the formation of many different types of metastable states, [4][5][6][7][8] in practice it is difficult to employ light to regenerate the initial ground state. The enthalpic and entropic factors that favor the photochemical generation of t… Show more

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Cited by 6 publications
(2 citation statements)
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“…In contrast, charge‐transfer irradiation of [Os(bpy) 2 (pySO)] 2+ shows no changes in the UV/Vis spectrum and thus provides no evidence for isomerization. This is all the more surprising since [Ru(bpy) 2 (pySO)] 2+ features two‐color reversible photochromism that is ascribed to the excited state S→O and O→S isomerization 27. The S→O isomerization in [Os(bpy) 2 (pySOCF 3 )] 2+ is irreversible at room temperature and requires modest heating to 60 °C in order to observe O→S reversion.…”
Section: Resultsmentioning
confidence: 99%
“…In contrast, charge‐transfer irradiation of [Os(bpy) 2 (pySO)] 2+ shows no changes in the UV/Vis spectrum and thus provides no evidence for isomerization. This is all the more surprising since [Ru(bpy) 2 (pySO)] 2+ features two‐color reversible photochromism that is ascribed to the excited state S→O and O→S isomerization 27. The S→O isomerization in [Os(bpy) 2 (pySOCF 3 )] 2+ is irreversible at room temperature and requires modest heating to 60 °C in order to observe O→S reversion.…”
Section: Resultsmentioning
confidence: 99%
“…The widespread investigation of Ru II –polypyridyl complexes over the past 30 years largely has roots in their impressive photophysical and redox properties, which make them amenable for adaptation to a myriad of technologies including dye‐sensitized solar cells (DSSCs),17 solar fuels photochemistry,8 light‐emitting electrochemical cells,9 photoluminescence sensors,10 biophotonics,11,12 photochromics,1318 water‐oxidation catalysis,19 low‐power photon upconversion,2023 as well as fundamental studies in photoinduced electron and energy transfer 2429. Interestingly, the related class of Ru II molecules that incorporate one or more cyclometalating ligands into their structure were only sparingly investigated over the same time frame 3032.…”
Section: Introductionmentioning
confidence: 99%