Abstract
We describe the inorganic polymer K4P8Te4 which is soluble, giving solutions that exhibit white emission upon 355 nm laser irradiation. An indirect band gap semiconductor (Eg ≈ 1.4 eV), K4P8Te4 crystallizes in the space group P2 1/m, with a = 6.946(1) Å, b = 6.555(1) A, c = 9.955(2) Å, and β = 90.420(3)° at 173(2) K. The compound features infinite chains of [P8Te44-] with covalent P-Te bonding and exhibits reversible crystal-glass phase-change behavior. When deposited from solution, the material forms highly crystalline K4P 8Te4 nanospheres. The thermal analysis, FT-IR, UV-vis diffuse reflectance, 31P magic angle spinning solid-state NMR spectroscopy, and pair distribution function (PDF) analysis for the crystal and glass forms and ab initio electronic structure calculations by the screened-exchange local density function approximation are also reported. Speciation of K4P8Te4 in solution studied with 31P solutionstate NMR spectroscopy, electrospray ionization mass spectrometry, and PDF analysis indicate exfoliation of [P8Te 44-] chains followed by rearrangement into molecular species.
| Original language | English |
|---|---|
| Pages (from-to) | 16303-16312 |
| Number of pages | 10 |
| Journal | Journal of the American Chemical Society |
| Volume | 131 |
| Issue number | 44 |
| DOIs | |
| Publication status | Published - 2009 |
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ASJC Scopus subject areas
- Chemistry(all)
- Catalysis
- Biochemistry
- Colloid and Surface Chemistry
Cite this
The tellurophosphate K4P8Te4 : Phase-change properties, exfoliation, photoluminescence in solution and nanospheres. / Chung, In; Song, Jung Hwan; Kim, Myung Gil; Malliakas, Christos D.; Karst, Angela L.; Freeman, Arthur J; Weliky, David P.; Kanatzidis, Mercouri G.
In: Journal of the American Chemical Society, Vol. 131, No. 44, 2009, p. 16303-16312.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The tellurophosphate K4P8Te4
T2 - Phase-change properties, exfoliation, photoluminescence in solution and nanospheres
AU - Chung, In
AU - Song, Jung Hwan
AU - Kim, Myung Gil
AU - Malliakas, Christos D.
AU - Karst, Angela L.
AU - Freeman, Arthur J
AU - Weliky, David P.
AU - Kanatzidis, Mercouri G
PY - 2009
Y1 - 2009
N2 - We describe the inorganic polymer K4P8Te4 which is soluble, giving solutions that exhibit white emission upon 355 nm laser irradiation. An indirect band gap semiconductor (Eg ≈ 1.4 eV), K4P8Te4 crystallizes in the space group P2 1/m, with a = 6.946(1) Å, b = 6.555(1) A, c = 9.955(2) Å, and β = 90.420(3)° at 173(2) K. The compound features infinite chains of [P8Te44-] with covalent P-Te bonding and exhibits reversible crystal-glass phase-change behavior. When deposited from solution, the material forms highly crystalline K4P 8Te4 nanospheres. The thermal analysis, FT-IR, UV-vis diffuse reflectance, 31P magic angle spinning solid-state NMR spectroscopy, and pair distribution function (PDF) analysis for the crystal and glass forms and ab initio electronic structure calculations by the screened-exchange local density function approximation are also reported. Speciation of K4P8Te4 in solution studied with 31P solutionstate NMR spectroscopy, electrospray ionization mass spectrometry, and PDF analysis indicate exfoliation of [P8Te 44-] chains followed by rearrangement into molecular species.
AB - We describe the inorganic polymer K4P8Te4 which is soluble, giving solutions that exhibit white emission upon 355 nm laser irradiation. An indirect band gap semiconductor (Eg ≈ 1.4 eV), K4P8Te4 crystallizes in the space group P2 1/m, with a = 6.946(1) Å, b = 6.555(1) A, c = 9.955(2) Å, and β = 90.420(3)° at 173(2) K. The compound features infinite chains of [P8Te44-] with covalent P-Te bonding and exhibits reversible crystal-glass phase-change behavior. When deposited from solution, the material forms highly crystalline K4P 8Te4 nanospheres. The thermal analysis, FT-IR, UV-vis diffuse reflectance, 31P magic angle spinning solid-state NMR spectroscopy, and pair distribution function (PDF) analysis for the crystal and glass forms and ab initio electronic structure calculations by the screened-exchange local density function approximation are also reported. Speciation of K4P8Te4 in solution studied with 31P solutionstate NMR spectroscopy, electrospray ionization mass spectrometry, and PDF analysis indicate exfoliation of [P8Te 44-] chains followed by rearrangement into molecular species.
UR - http://www.scopus.com/inward/record.url?scp=70450178025&partnerID=8YFLogxK
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U2 - 10.1021/ja907273g
DO - 10.1021/ja907273g
M3 - Article
VL - 131
SP - 16303
EP - 16312
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 44
ER -