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Changes in the Structural Dimensionality of Selenidostannates in Ionic Liquids: Formation, Structures, Stability, and Photoconductivity
Author(s) -
Lin Yumei,
Xie Dewang,
Massa Werner,
Mayrhofer Leonhard,
Lippert Sina,
Ewers Benjamin,
Chernikov Alexey,
Koch Martin,
Dehnen Stefanie
Publication year - 2013
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201300807
Subject(s) - photoconductivity , ionic liquid , ionic bonding , ion , chemical physics , materials science , chemistry , organic chemistry , optoelectronics , catalysis
In situ transformations of selenidostannate frameworks in ionic liquids (ILs) were initiated by treatment of the starting phase K 2 [Sn 2 Se 5 ] and the consecutive reaction products by means of temperature increase and/or amine addition. Along the reaction pathway, the framework dimensionalities of the five involved selenidostannate anions develop from 3D to 1D and back, both in top‐down and bottom‐up style. Addition of ethane‐1,2‐diamine (en) led to the reversion of the 2D→1D step from 2D‐{[Sn 24 Se 56 ] 16− } to 1D‐{[Sn 6 Se 14 ] 4− }. As rationalized by DFT investigations, the 2D anion is thermodynamically favored. Photoconductivity measurements reveal that all samples show Schottky contact behavior with absolute thresholds below 10 V. One of the samples exhibits conductive states within the energy range of visible photons.