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- Title
Syntheses, Structures, and Electronic Properties of a New Series of Tellurides of the Type [Sequestered Cation]<sub>2</sub>(Te <sub>x</sub>) ( x = 1-4).
- Authors
Thiele, Günther; Lichtenberger, Niels; Tonner, Ralf; Dehnen, Stefanie
- Abstract
The list of 'classical' tellurides with organic cations was expanded by the synthesis of single-crystalline salts [Li2( en) n](Te x) ( en = ethylenediamine) with n = 4, x = 1 ( 1), n = 4, x = 2 ( 2), and n = 5, x = 3 ( 3), [K( 18c6)]2(Te x) ( 18c6 = 1, 4,7, 10, 13, 16-hexaoxacycloocta-decane) with x = 2 ( 4), 4 ( 5), [K( 18c6)]2[K( en)]2(Te2)2 ( 6), and [K([2.2.2] crypt)]2(Te2) ( 7) ([2.2.2] crypt = 4, 7,13, 16, 21, 24-hexaoxa-1, 10-diazabicyclo[8.8.8]-hexacosane). Electronic structure calculations on free molecules and periodic approaches are discussed and compared with experimental UV/Vis spectra, providing a correlation of the bandgaps with the telluride chain length, and a possibility for affecting the gap by according choice of the counterions. Additionally, 125Te NMR chemical shifts of the presented series of en solvated lithium tellurides are presented.
- Subjects
TELLURIDES; CATIONS; ELECTRONIC structure; FREE molecules; ETHYLENEDIAMINE; BAND gaps; TELLURIUM compounds; CHEMICAL shift (Nuclear magnetic resonance)
- Publication
Zeitschrift für Anorganische und Allgemeine Chemie, 2013, Vol 639, Issue 15, p2809
- ISSN
0044-2313
- Publication type
Article
- DOI
10.1002/zaac.201300303