Anisotropy of the proton spin–lattice relaxation time in the superconducting intercalation complex TaS2(NH3): Structural and bonding implications

摘要: The nature of the interaction responsible for formation molecular intercalation complexes between Lewis bases and layered transition metal dichalcogenides is not well understood. To some extent this due to a lack structural information. A prototype these TaS2(NH3), in which monolayers ammonia are inserted metallic, superconducting layers TaS2. compound crystalline stoichiometric. Measurement anisotropy proton spin–lattice relaxation time at 300 °K indicates that threefold symmetry axis perpendicular disulfide as suggested by other workers, but parallel layers. This orientation precludes direct lone pair orbital atoms. interactions governing structure complex may be similar those obtaining TaS2 number substituted pyridines, pair...