TY - JOUR
T1 - Platinum chalcogenido MCM-41 analogues. High hexagonal order in mesostructured semiconductors based on Pt2+ and [Ge4Q10]4- (Q = S, Se) and [Sn4Se10]4- adamantane clusters
AU - Trikalitis, Pantelis N.
AU - Rangan, Krishnaswamy K.
AU - Kanatzidis, Mercouri G.
PY - 2002/3/20
Y1 - 2002/3/20
N2 - Highly periodic hexagonal honeycombs of platinum-germanium chalcogenide and platinumtin selenide frameworks were prepared by linking corresponding [Ge4Q10]4- (Q = S, Se) and [Sn4Se10]4- clusters with Pt2+ ions. The non-oxidic honeycombs designated as CnPyPtGeQ and CnPyPtSnSe were templated by the lyotropic liquid-crystalline phase of alkylpyridinium surfactant [CnH2n+1NC5H5]Br (CnPyBr) with n= 12, 14, 16, 18, 20, and 22. Although the materials are amorphous at the microscale, they have crystalline mesoporosity with well-ordered and aligned surfactant-filled cylindrical pores. In addition to high mesoscopic order, the pore-pore separation is adjustable with the surfactant chain length (i.e., value of n). The quality of these materials, as judged by the degree of hexagonal order, rivals or exceeds that reported for the highest quality MCM-41 silicates. The materials have the lowest band gap reported so far for mesostructured chalcogenides solids, in the range 1.5 < Eg < 2.3 eV. The CnPyPtGeS analogues show intense photoluminescence at 77 K when excited with light above the band gap.
AB - Highly periodic hexagonal honeycombs of platinum-germanium chalcogenide and platinumtin selenide frameworks were prepared by linking corresponding [Ge4Q10]4- (Q = S, Se) and [Sn4Se10]4- clusters with Pt2+ ions. The non-oxidic honeycombs designated as CnPyPtGeQ and CnPyPtSnSe were templated by the lyotropic liquid-crystalline phase of alkylpyridinium surfactant [CnH2n+1NC5H5]Br (CnPyBr) with n= 12, 14, 16, 18, 20, and 22. Although the materials are amorphous at the microscale, they have crystalline mesoporosity with well-ordered and aligned surfactant-filled cylindrical pores. In addition to high mesoscopic order, the pore-pore separation is adjustable with the surfactant chain length (i.e., value of n). The quality of these materials, as judged by the degree of hexagonal order, rivals or exceeds that reported for the highest quality MCM-41 silicates. The materials have the lowest band gap reported so far for mesostructured chalcogenides solids, in the range 1.5 < Eg < 2.3 eV. The CnPyPtGeS analogues show intense photoluminescence at 77 K when excited with light above the band gap.
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U2 - 10.1021/ja017245b
DO - 10.1021/ja017245b
M3 - Article
C2 - 11890811
AN - SCOPUS:0037139548
SN - 0002-7863
VL - 124
SP - 2604
EP - 2613
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 11
ER -