Thermochromic effects in a Jahn–Teller active CuCl 6 4 − ?> layered hybrid system
Thermochromic effects in a Jahn–Teller active CuCl 6 4 − ?> layered hybrid system
复制标题
Jahn-Teller 活性 CuCl 6 4 − ?> 层状杂化体系中的热致变色效应
DOI：
10.1088/0953-8984/25/50/505901
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
P. Loosdrecht
中科院分区：
文献类型：
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作者：
Antonio Caretta;R. Miranti;R. Miranti;A. H. Arkenbout;A. Polyakov;A. Meetsma;Rahmat Hidayat;M. Tjia;Thomas Palstra;P. Loosdrecht
利用温度依赖光谱吸收实验研究了四氯双（苯基乙基铵）铜（II） （C6H5CH2CH2NH3）2CuCl4 （PEACuCl）杂化材料。在近红外区（1.3 ~ 1.9 eV）观测到的吸收带随着温度的升高普遍呈现红移。光谱组分的温度引起的能量转移与温度引起的Cu-Cl键长变化一致。另外，随着温度的升高，电荷转移带边缘（在可见光区2.0 ~ 2.8 eV）发生了红移，引起了热致变色。通过与类似cu基体系的比较，认为这种转变是由能带的加宽和强化引起的。
The hybrid material copper (II) tetrachloro-bis(phenyl ethyl ammonium) (C6H5CH2CH2NH3)2CuCl4, or PEACuCl, has been investigated by temperature-dependent spectroscopic absorption experiments. The absorption bands observed in the near-infrared region (1.3–1.9 eV) generally exhibit redshifts with increasing temperature. The temperature-induced energy shifts of the spectral components are shown to be consistently related to temperature-induced Cu–Cl bond length changes. Additionally, the thermochromic color change is caused by a charge transfer band edge redshifting (in the visible region 2.0–2.8 eV) with increasing temperature. By comparison with similar Cu-based systems, it is suggested that this shift is caused by broadening and strengthening of the band.