CRM2 UMR 7036, Institut Jean Barriol, Université de Lorraine, Vandoeuvre les Nancy, France.
Phys Chem Chem Phys. 2012 Mar 21;14(11):3775-81. doi: 10.1039/c2cp23607a. Epub 2012 Feb 8.
We study the properties of photoinduced metal-nitrosyl linkage isomers in sodium nitroprusside (SNP) as a function of particle size. By embedding the molecular complex at various concentrations into mesopores of silica xerogels the size of the particles can be adjusted. The ground state is characterized by X-ray diffraction, absorption and infrared spectroscopy. The physical properties of the photoswitched molecules were analysed by steady-state low-temperature absorption, infrared spectroscopy and by nanosecond transient absorption spectroscopy. The electronic structure as well as the activation energies of the metastable linkage isomers are independent of the particle size down to single isolated molecules, indicating that the SNP complexes are quasi-free inside the pores of the gel.
我们研究了作为粒径函数的硝普酸钠（SNP）中光诱导的金属-亚硝酰键异构体的性质。通过将分子复合物以不同浓度嵌入二氧化硅干凝胶的介孔中，可以调节颗粒的大小。通过 X 射线衍射、吸收和红外光谱对基态进行了表征。通过稳态低温吸收、红外光谱和纳秒瞬态吸收光谱分析了光开关分子的物理性质。电子结构以及亚稳键异构体的活化能与粒径无关，低至单个孤立分子，表明 SNP 复合物在凝胶孔内几乎是自由的。
