Please use this identifier to cite or link to this item: https://doi.org/10.1021/cm020781y
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dc.titleSulfidation of single molecular sheets of MoO3 pillared by bipyridine in nanohybrid MoO3(4,4′-bipyridyl)0.5
dc.contributor.authorWei, X.M.
dc.contributor.authorZeng, H.C.
dc.date.accessioned2014-10-09T10:01:07Z
dc.date.available2014-10-09T10:01:07Z
dc.date.issued2003-01
dc.identifier.citationWei, X.M., Zeng, H.C. (2003-01). Sulfidation of single molecular sheets of MoO3 pillared by bipyridine in nanohybrid MoO3(4,4′-bipyridyl)0.5. Chemistry of Materials 15 (2) : 433-442. ScholarBank@NUS Repository. https://doi.org/10.1021/cm020781y
dc.identifier.issn08974756
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/92357
dc.description.abstractIndividual sheets of MoO3 in MoO3(4,4′-bipyridyl)0.5 (basal spacing d002 = 1.12 nm) can be considered as two-dimensional (2D) inorganic "macromolecules" while the interlayer organic ligands can be viewed as "pillars" to support or as "threads" to suspend these 2D host planes. This work concerns a sulfidation investigation of single molecular sheets of MoO3 in the single crystals of the above compound under a H2S/H2 stream with various characterization methods. It is found that at a temperature as low as 100 °C, formation of surface HxMoO3-(4,4′-bipyridyl)0.5 commences. A surface product of MoO2-xSx is also observed throughout 100-200 °C. At 250 °C, all these intermediate phases are transformed completely to a final phase MoS2(4,4′-bipyridyl)0.2 (basal spacing d001, = 1.02 nm) accompanying a partial deintercalation (from 0.5 down to 0.2) of 4,4′-bipyridine molecules from the interlayer space. In this connection, 4,4′-bipyridine molecules change from a standing configuration to a lying one after this sulfidation process. Although this new phase is thermally stable at its formation temperature (250 °C), inter-slab condensation of MoS2 (basal spacing d002 = 0.62 nm) can also be observed in the topmost surface region. A mechanism based on these findings is also proposed. As demonstrated in this work, sulfurizing single molecular sheets of MoO3 in existing MoO3-containing layered compounds would also serve as a new means for synthesis of lamellar organic-inorganic nanohybrids comprising building units of transition metal dichalcogenides.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1021/cm020781y
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentCHEMICAL & ENVIRONMENTAL ENGINEERING
dc.description.doi10.1021/cm020781y
dc.description.sourcetitleChemistry of Materials
dc.description.volume15
dc.description.issue2
dc.description.page433-442
dc.description.codenCMATE
dc.identifier.isiut000180603200012
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