Time-Resolved Infrared Spectroscopy of Intermediates and Products from Photolysis of 1-(2-Nitrophenyl)ethyl Phosphates: Reaction of the 2-Nitrosoacetophenone Byproduct with Thiols
作者:Andreas Barth、John E. T. Corrie、Michael J. Gradwell、Yashusi Maeda、Werner Mäntele、Tanja Meier、David R. Trentham
DOI:10.1021/ja964430u
日期:1997.5.1
infrared (FTIR) spectroscopy and time-resolved single wavelength infrared (IR) spectroscopy have been applied to study the mechanism of photochemical release of adenosine 5‘-triphosphate (ATP) from its P3-[1-(2-nitrophenyl)ethyl] ester (caged ATP). Bands arising from phosphate and non-phosphate vibrations characteristic of the aci-nitro anion intermediate and from free ATP and byproducts of the nitrophenylethyl
快速扫描傅里叶变换红外 (FTIR) 光谱和时间分辨单波长红外 (IR) 光谱已用于研究腺苷 5'-三磷酸 (ATP) 从其 P3-[1-(2-硝基苯基) 光化学释放的机制)乙酯]酯(笼状ATP)。使用笼状 ATP 的 13C、15N 和 18O 同位素异构体指定了由 aci-硝基阴离子中间体的磷酸盐和非磷酸盐振动特征以及游离 ATP 和硝基苯乙基副产物产生的谱带。使用时间分辨单频红外光谱监测这些波段中的几个,证实 ATP 的释放发生在与 aci-nitro 阴离子中间体衰变同步的单个指数过程中。已经确定了在二硫苏糖醇 (DTT) 不存在和存在下由 1-(2-硝基苯基) 乙基产生的反应产物的光谱特征。在 DTT 存在下进行光解的主要最终副产品是 3-甲基邻氨基苯甲酸。其机制...
Controlled release and characterisation of photocaged molecules using <i>in situ</i> LED illumination in solution NMR spectroscopy
作者:Jack E. Bramham、Matja Zalar、Alexander P. Golovanov
DOI:10.1039/d2cc04731d
日期:——
We demonstrate that photo-uncaging reactions triggered by LED illumination can be conveniently monitored in situ by solution NMR, offering new ways to characterise and optimise photocages.