Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 131, Issue 1, Pages 75-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja807928d
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- National Science Foundation [DMR-0801855]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0801855] Funding Source: National Science Foundation
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The strongly anisotropic thioarsenates A(3)Ta(2)AsS(11) are stabilized in a polysulfide flux. All compounds contain the same parallel (1)/-[Ta2AsS113-] polymeric anionic chains, but the size of the alkali-metals has a profound effect on the packing of the chains. The K+ or Rb+ favor noncentrosymmetric packing of the chains, whereas the larger Cs+ favors the centrosymmetric packing. The chains feature the combination of two asymmetric units [Ta2S11] and [AsS3] and exhibit strong nonlinear optical (NLO) second harmonic generation.
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