longer triplet state lifetimes (τT = 9–29 μs). Also, a large Stokes shift (Δν = 5682–6957 cm—1) was witnessed for all the rhenium dipyrrinates. Triplet emission was reflected in the efficient singlet oxygen generation yields (ΦΔ ∼ 0.75–0.98) along with the distinct photo-stability. Density functional theory (DFT) calculations revealed that the electron density is spread over the dipyrrin unit in most complexes
已经制备并表征了一系列dip (I)二
吡喃酮配合物(Re1-Re8)。报道了它们的晶体结构,
磷光和单线态氧生成的研究。所述芳族取代基,如
噻吩基,p -
溴苯基,p
氟苯基,米
氟苯基,
五氟苯基,Ñ -butylcarbazole,Ñ -phenylcarbazole,和Ñ -butylphenothiazine,被链接到重新dipyrrinates的C5位。从给电子(例如
咔唑)到吸电子(例如,电子)改变取代基的电子性质(
五氟苯基))可以改变这些配合物的结构,电
化学和光谱性质。特别地,
铼dipyrrinates表明在近红外区域的
磷光足够长的三线态寿命(τ Ť = 9-29微秒)。此外,大的斯托克斯频移(Δ ν = 5682-6957厘米-1)被目击所有
铼dipyrrinates。三重态发光反映在有效的单线态氧产生的产率(Φ Δ〜0.75–0.98)以及独特的光稳定性。密度泛函理论(DFT)计算表明