Zhao Si Si, Wang Lei, Liu Yingjie, Chen Li, Xie Zhigang
Northeast Normal University , Changchun 130024, People's Republic of China.
State Key Laboratory of Polymer Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , 5625 Renmin Street, Changchun, Jilin 130022, People's Republic of China.
Inorg Chem. 2017 Nov 20;56(22):13975-13981. doi: 10.1021/acs.inorgchem.7b02123. Epub 2017 Nov 3.
Two Cu(I) cluster based coordination polymers, [CuI(cis-bpype)]·CHCN (1) and [CuI(cis-bpype)(trans-bpype)]·3DMF (2), have been synthesized from cis- and trans-1,2-bis(4-(pyridin-2-yl)phenyl)ethane (cis- and trans-bpype) ligands and {CuI(PPh)} as starting materials. In compound 1, adjacent rhomboid-type {CuI} units from the decomposition of {CuI(PPh)} starting material connect by cis-bpype ligands to form a 1D framework. Compound 2 also has a 1D structure, but it has a {ML}-type coordinated cage constructed by three cis-bpype ligands and two {CuI} secondary building units (SBU), and these coordination cages further link by trans-bpype to form the final frameworks. Upon cooling from 300 to 80 K, these Cu(I) cluster based coordination polymers exhibit interesting thermochromic behavior. In particular, compound 2 gives a chromic process from green luminescence at room temperature to red luminescence at 80 K and its corresponding CIE coordinates shift from green (0.34, 0.43) at 300 K to red (0.46, 0.42) at 80 K, respectively. This red shift of 124 nm (516 to 640 nm) is large enough to ensure a color change visible to the naked eye, which can be potentially utilized as a temperature sensor with a wide range.
以顺式和反式-1,2-双(4-(吡啶-2-基)苯基)乙烷（顺式和反式-bpype）配体以及{CuI(PPh)}为起始原料，合成了两种基于Cu(I)簇的配位聚合物，[CuI(cis-bpype)]·CHCN (1) 和 [CuI(cis-bpype)(trans-bpype)]·3DMF (2)。在化合物1中，起始原料{CuI(PPh)}分解产生的相邻菱形{CuI}单元通过顺式-bpype配体连接形成一维框架。化合物2也具有一维结构，但它有一个由三个顺式-bpype配体和两个{CuI}二级构筑单元（SBU）构建的{ML}-型配位笼，这些配位笼通过反式-bpype进一步连接形成最终框架。从300 K冷却至80 K时，这些基于Cu(I)簇的配位聚合物表现出有趣的热致变色行为。特别地，化合物2呈现出从室温下的绿色发光到80 K时的红色发光的变色过程，其相应的CIE坐标分别从300 K时的绿色(0.34, 0.43) 变为80 K时的红色(0.46, 0.42)。124 nm（从516 nm到640 nm）的这种红移足够大，以确保肉眼可见颜色变化，这有可能被用作宽范围的温度传感器。
