Structurally dependent thermochromism of two iodoargentate hybrids based on the intermolecular charge transfer

Two iodoargentates directed by N-alkylated 3-cyanopyridiniums, [(EC) (Ag2I3)]n (1) and [(PC) (Ag5I6)]n (2) (EC = N-ethyl-3-cyanopyridinium, PC=N-propyl-3-cyanopyridinium) have been solvothermally synthesized. Structural analysis reveals that the variation of N-substituents on 3-cyanopyridinium is re...

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Bibliographic Details
Published in:Solid state sciences 2015-08, Vol.46, p.14-18
Main Authors: Zhang, Caifeng, Shen, Junju, Guan, Qi, Yu, Tanlai, Fu, Yunlong
Format: Article
Language:English
Subjects:
3-Cyanopyridinium
Belts
Chains
Charge transfer
Column packings
Intermolecular charge transfer
Iodoargentate
Liquid nitrogen
Spectra
Structural analysis
Thermochromism
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Summary:Two iodoargentates directed by N-alkylated 3-cyanopyridiniums, [(EC) (Ag2I3)]n (1) and [(PC) (Ag5I6)]n (2) (EC = N-ethyl-3-cyanopyridinium, PC=N-propyl-3-cyanopyridinium) have been solvothermally synthesized. Structural analysis reveals that the variation of N-substituents on 3-cyanopyridinium is responsible for change of the inorganic moieties (belt-like chain for 1 and columnar chain for 2) and consequent packing modes, which further results in the shift of absorption edges and different thermochromic behavior (from yellow at room temperature to almost colorless for 1 and pale yellow for 2 at liquid nitrogen temperature), as proved by UV–vis spectra. [Display omitted] •N-alkylated 3-cyano pyridinium lead to structural irregularity of iodoargentate.•The thermochromism of 1 and 2 is attributed to intermolecular charge transfer.•Absorption edges and thermochromic behavior of 1 and 2 are structurally dependent.
ISSN:1293-2558
1873-3085
DOI:10.1016/j.solidstatesciences.2015.05.009