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The effect of deuterium on the photophysical properties of DNA-stabilized silver nanoclusters
Chemical Science ( IF 7.6 ) Pub Date : 2021-11-25 , DOI: 10.1039/d1sc05079f Cecilia Cerretani 1 , Gustav Palm-Henriksen 1 , Mikkel B Liisberg 1 , Tom Vosch 1
Chemical Science ( IF 7.6 ) Pub Date : 2021-11-25 , DOI: 10.1039/d1sc05079f Cecilia Cerretani 1 , Gustav Palm-Henriksen 1 , Mikkel B Liisberg 1 , Tom Vosch 1
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We investigated the effect of using D2O versus H2O as solvent on the spectroscopic properties of two NIR emissive DNA-stabilized silver nanoclusters (DNA–AgNCs). The two DNA–AgNCs were chosen because they emit in the same energy range as the third overtone of the O–H stretch. Opposite effects on the ns-lived decay were observed for the two DNA–AgNCs. Surprisingly, for one DNA–AgNC, D2O shortened the ns decay time and enhanced the amount of μs-lived emission. We hypothesize that the observed effects originate from the differences in the hydrogen bonding strength and vibrational frequencies in the two diverse solvents. For the other DNA–AgNC, D2O lengthened the ns decay time and made the fluorescence quantum yield approach unity at 5 °C.
中文翻译：
氘对 DNA 稳定银纳米团簇光物理性质的影响
我们研究了使用 D 2 O与H 2 O 作为溶剂对两个 NIR 发射 DNA 稳定的银纳米团簇 (DNA-AgNCs) 光谱特性的影响。选择这两种 DNA-AgNC 是因为它们在与 O-H 伸展的第三泛音相同的能量范围内发射。对于两种 DNA-AgNC，观察到对 ns-live 衰变的相反影响。令人惊讶的是，对于一种 DNA-AgNC，D 2 O 缩短了 ns 衰减时间并提高了微秒寿命发射量。我们假设观察到的效果源于两种不同溶剂中氢键强度和振动频率的差异。对于其他 DNA-AgNC，D 2O 延长了 ns 衰减时间并使荧光量子产率在 5°C 下接近统一。
更新日期：2021-12-02
中文翻译：
氘对 DNA 稳定银纳米团簇光物理性质的影响
我们研究了使用 D 2 O与H 2 O 作为溶剂对两个 NIR 发射 DNA 稳定的银纳米团簇 (DNA-AgNCs) 光谱特性的影响。选择这两种 DNA-AgNC 是因为它们在与 O-H 伸展的第三泛音相同的能量范围内发射。对于两种 DNA-AgNC，观察到对 ns-live 衰变的相反影响。令人惊讶的是，对于一种 DNA-AgNC，D 2 O 缩短了 ns 衰减时间并提高了微秒寿命发射量。我们假设观察到的效果源于两种不同溶剂中氢键强度和振动频率的差异。对于其他 DNA-AgNC，D 2O 延长了 ns 衰减时间并使荧光量子产率在 5°C 下接近统一。
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