Transient absorption spectroscopy porphyrins and photocatalysts

Nanosecond transient
measurements were performed with a custom laser spectrometer comprised of a Brillian Quantel laser with frequency
doubled (532 nm, 330 mJ) or tripled (355 nm, 160 mJ) option, an Applied
Photophysics xenon light source including a mod. 720 150 W lamp housing, a mod.
620 power controlled lamp supply and a mod. 03- 102 arc lamp pulser. Laser
excitation was provided at 90° with respect to the white light probe beam.
Light transmitted by the sample was focused onto the entrance slit of a SpectraKinetic monochromator
(Applied photophysics). Kinetic traces were processed by means of a Agilent digital oscilloscope. A typical pulse energy
of 2 mJ cm−2 was used.Zn and Sn refer to the metal centreme = Ph-CO2Me subsituentOH = Ph-CO2HN = pyridyl PH and POEt = Ph-PO(OEt)2TEOA = 5% v/v triethanolamine added to 1:1 MeCN:H2O solutioncat = 10 equiv CoNMeim addedN+ = methyl pyridiniumstructures are provided in the JPEG file.

在自制的激光光谱仪中，以Brillian Quantel激光器为光源，其具有倍频（532 nm，330 mJ）或三频（355 nm，160 mJ）选项，结合Applied Photophysics氙灯光源，包括型号为720的150 W灯座、型号为620的功率控制灯座以及型号为03-102的弧光灯脉冲发生器。激光激发相对于白光探针光束成90°角进行。样品透射的光线被聚焦于SpectraKinetic单色仪（Applied Photophysics）的入口狭缝。动力学轨迹通过Agilent数字示波器进行处理。典型脉冲能量为2 mJ cm−2。Zn和Sn分别指代金属中心（e = Ph-CO2Me取代基OH = Ph-CO2HN = 吡啶基PH和POEt = Ph-PO(OEt)2TEOA = 5% v/v三乙醇胺添加至1:1的MeCN:H2O溶液中cat = 10等当量CoNMeim添加N+ = 甲基吡啶基团），相关结构以JPEG文件提供。