TY - JOUR
T1 - Heterostructured Bi-Based Cuprate High-Tc Superconductors with Unusually Coordinated Metal Halides
AU - Choy, J. H.
AU - Kim, Y. I.
AU - Hwang, S. J.
AU - Yang, I. S.
N1 - Funding Information:
This work was supported by the Korea Science and Engineering Foundation (KOSEF) through the Center for Molecular Catalysis (CMC). The authors are grateful to Professor D.-K. Kim and Professor M. Kakihana for their help with the measurement of the Raman spectra.
PY - 1999/10
Y1 - 1999/10
N2 - Attempts have been made to prepare various high-Tc superconducting intercalation compounds, M-X-Bi2Sr2Can-1CunO 2n+4+δ (M=metal; X=halogen; n=1, 2, and 3), with the synthetic strategy of hard-soft-acid-base interaction. The chimie douce route such as vapor transport and ionic diffusion is found to be effective in intercalating soft Lewis acidic guest species (I-3, AgxIx-ww, HgIδ-2, HgBrδ-2, and AuIδ-3) into the Lewis basic Bi2Sr2Can-1CunO 2n+4+δ lattice. According to the X-ray diffraction and magnetic property measurements on these intercalates, it becomes clear that the basal increment upon intercalation (3.25-7.35 Å) is governed by the interlayer geometry of the intercalant, while the accompanying Tc change depends on the charge transfer between host and guest. The extended X-ray absorption fine structure and Raman studies reveal that mercuric halides are intercalated as linear molecules as in vapor state, while silver iodide forms a two-dimensionally extended ionic-conducting channel. In the case of new gold iodide intercalate, unique trigonal planar AuI3 species is identified as the first example of an isolated gold iodide molecule.
AB - Attempts have been made to prepare various high-Tc superconducting intercalation compounds, M-X-Bi2Sr2Can-1CunO 2n+4+δ (M=metal; X=halogen; n=1, 2, and 3), with the synthetic strategy of hard-soft-acid-base interaction. The chimie douce route such as vapor transport and ionic diffusion is found to be effective in intercalating soft Lewis acidic guest species (I-3, AgxIx-ww, HgIδ-2, HgBrδ-2, and AuIδ-3) into the Lewis basic Bi2Sr2Can-1CunO 2n+4+δ lattice. According to the X-ray diffraction and magnetic property measurements on these intercalates, it becomes clear that the basal increment upon intercalation (3.25-7.35 Å) is governed by the interlayer geometry of the intercalant, while the accompanying Tc change depends on the charge transfer between host and guest. The extended X-ray absorption fine structure and Raman studies reveal that mercuric halides are intercalated as linear molecules as in vapor state, while silver iodide forms a two-dimensionally extended ionic-conducting channel. In the case of new gold iodide intercalate, unique trigonal planar AuI3 species is identified as the first example of an isolated gold iodide molecule.
UR - http://www.scopus.com/inward/record.url?scp=0001132876&partnerID=8YFLogxK
U2 - 10.1006/jssc.1999.8301
DO - 10.1006/jssc.1999.8301
M3 - Article
AN - SCOPUS:0001132876
VL - 147
SP - 328
EP - 335
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
SN - 0022-4596
IS - 1
ER -