2023
DOI: 10.1002/nadc.20234132821
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Trendbericht: Photochemie

Abstract: Die photochemische Forschung entwickelt unter anderem Photo(redox)katalysatoren, farbstoffsensibilisierte Solarzellen (DSSCs) und lichtemittierende Dioden (LED). Solche Systeme benötigen Moleküle, die Sonnenlicht absorbieren und für chemische Reaktionen nutzbar machen oder in definierten Wellenlängenbereichen emittieren. Bisher waren dies meist Edelmetallkomplexe. Ein Ziel ist es, Komplexe zu entwickeln, die billigere und besser verfügbare Metalle enthalten. Vielversprechende Ergebnisse gibt es für Systeme mit… Show more

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“…Much effort has been devoted to increase the PL quantum yield (Φ) and PL lifetime of chromium(III) complexes with record values of Φ = 30% and τ = 4500 μs achieved with complexes of tridentate polypyridine ligands forming six-membered chelate rings. ,, The so-called molecular rubies, with [Cr(ddpd) 2 ] 3+ as the parent complex, meanwhile comprise a series of highly emissive polypyridyl chromium(III) complexes, e.g., [Cr(H 2 tpda) 2 ] 3+ (H 2 tpda = 2,6-bis(2-pyridylamino)pyridine), [Cr(dqp) 2 ] 3+ (dqp = 2,6-di(quinolin-8-yl)pyridine), [Cr(tpe) 2 ] 3+ (tpe = 1,1,1-tris(pyrid-2-yl)ethane), or [Cr(bpmp) 2 ] 3+ (bpmp = 2,6-bis(2-pyridyl-methyl)pyridine) . These photostable molecular rubies have already been utilized in various applications, such as in photoredox catalysis, as pressure or temperature sensors, , in upconversion processes, or in circularly polarized emission. , These developments have been reviewed elsewhere. , …”
Section: Introductionmentioning
confidence: 99%
“…Much effort has been devoted to increase the PL quantum yield (Φ) and PL lifetime of chromium(III) complexes with record values of Φ = 30% and τ = 4500 μs achieved with complexes of tridentate polypyridine ligands forming six-membered chelate rings. ,, The so-called molecular rubies, with [Cr(ddpd) 2 ] 3+ as the parent complex, meanwhile comprise a series of highly emissive polypyridyl chromium(III) complexes, e.g., [Cr(H 2 tpda) 2 ] 3+ (H 2 tpda = 2,6-bis(2-pyridylamino)pyridine), [Cr(dqp) 2 ] 3+ (dqp = 2,6-di(quinolin-8-yl)pyridine), [Cr(tpe) 2 ] 3+ (tpe = 1,1,1-tris(pyrid-2-yl)ethane), or [Cr(bpmp) 2 ] 3+ (bpmp = 2,6-bis(2-pyridyl-methyl)pyridine) . These photostable molecular rubies have already been utilized in various applications, such as in photoredox catalysis, as pressure or temperature sensors, , in upconversion processes, or in circularly polarized emission. , These developments have been reviewed elsewhere. , …”
Section: Introductionmentioning
confidence: 99%