Preparation, structure and optical properties of [CH3SC(=NH2)NH2]3PbI5, [CH3SC(=NH2)NH2]4Pb2Br8 and [CH3SC(=NH2)NH2]3PbCl5•CH3SC(=NH2)NH2Cl

被引:67
|
作者
Mousdis, GA
Gionis, V
Papavassiliou, GC
Raptopoulou, CP
Terzis, A
机构
[1] Natl Hellen Res Fdn, Inst Theoret & Phys Chem, GR-11635 Athens, Greece
[2] NCSR Demokritos, Inst Mat Sci, Athens 15310, Greece
关键词
D O I
10.1039/a802926a
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The preparation, crystal structures and optical absorption spectra of [CH3SC (= NH2)NH2](3)PbI5 1, [CH3SC (=NH2)NH2](4)Pb2Br8 2 and [CH3SC(=NH2)NH2](3)PbCl5. CH3SC (=NH2)NH2Cl 3 are reported. Compounds 1 and 3 consist of deformed PbX6, octahedra, which share opposite corners to form quasi-zero-dimensional or one-dimensional infinite chains along the a-axis. Compound 2 consists of Pb2Br9 units which-are connected with two neighbouring units by non-opposite Br atoms; in this way, infinite zigzag chains are formed. A blue shift of the excitonic absorption bands, in comparison to those of systems with higher dimensionality, is observed.
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页码:2259 / 2262
页数:4
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