Studies for molecular electronic devices based on light-induced phase transitions

（CH_3）_2CHNH_3^+CuCl_3^-在50℃左右表现出热致变色相变，Cu^<2+>离子之间的磁相互作用从反铁磁转变为铁磁。我们测量了该材料的UV-VIS-NIR光谱的温度依赖性，发现在室温下出现在1.3和2.2eV的两个波段，在相变温度以上完全消失。用两种激光器对这两个波段进行了辐射，但没有观察到光致相变。未来，我们需要一个先进的策略，其中激发态的电位面被考虑。

(CH_3)_2CHNH_3^+CuCl_3^- is known to show a thermochromic phase transition at about 50ﾟC,where the magnetic interaction between the Cu^<2+> ions drastically changes from antiferromagnetic to ferromagnetic. We have measured temperature dependence of the UV-VIS-NIR spectrum of this material, and have found that two bands which appear at 1.3 and 2.2eV at room temperature, completely disappear above the phase transition temperature. Radiation of the two bands were carried out with two kinds of lasers, but observation of the light-induced phase transition was unsuccessful. In future, we need an advanced strategy where the potential surface of the excited state is considered.