Abstract
The solvothermal synthesis and characterization of two indium selenides with stoichiometry [NH4][InSe2] is described. Yellow [NH4][InSe2] (1), which exhibits a layered structure, was initially prepared in an aqueous solution of trans-1,4-diaminocyclohexane, and subsequently using a concentrated ammonia solution. A red polymorph of one-dimensional character, [NH4][InSe2] (2), was obtained using 3,5-dimethylpyridine as solvent. [NH4][InSe2] (1) crystallizes in the non-centrosymmetric space group Cc (a=11.5147(6), b=11.3242(6), c=15.9969(9) Å and ß=100.354(3)°). The structural motif of the layers is the In4Se10 adamantane unit, composed of four corner-linked InSe4 tetrahedra. These units are linked by their corners, forming [InSe2]- layers which are stacked back to back along the c-direction, and interspaced by [NH4]+cations. The one-dimensional polymorph, (2), crystallizes in the tetragonal space group, I4/mcm (a=8.2519(16), c=6.9059 (14) Å). This structure contains infinite chains of edge-sharing InSe4 tetrahedra separated by [NH4]+ cations.
Original language | English |
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Pages (from-to) | 159-165 |
Number of pages | 7 |
Journal | Journal of Solid State Chemistry |
Volume | 204 |
Early online date | 30 May 2013 |
DOIs | |
Publication status | Published - Aug 2013 |
Keywords
- Solvothermal synthesis
- Crystal structure
- Indium selenides
- Optical properties
- TERNARY THALLIUM CHALCOGENIDES
- TEMPERATURE PHASE-TRANSITIONS
- LAYERED SINGLE-CRYSTALS
- ONE-DIMENSIONAL INDIUM
- SOLVOTHERMAL SYNTHESIS
- 2ND-HARMONIC GENERATION
- TLINS2 CRYSTALS
- X-RAY
- SELENIDE
- TLGASE2