X-ray Crystal Structure and Luminescence Properties of Pd(II)and Pt(II)Complexes with Dithiopyrrole

摘要

The complexes Pd(nbmtp)Cl2 and Pt(nbmtp)Cl2(nbmptp=1-nonyl-3,4-bis(methylthio)pyrrole)were prepared and their x-ray structures were determined at room temperature.The four-coordinated metal unit and the pyrrole ring formed a nearly planar geometry.The free ligand dissolved in CH2Cl2 produced two luminescence bands associated with the lone-pair electron of S(lambda_(max)=525 nm)and the pyrrole pi electron(lambda_(max)=388 nm).When the two complexes were dissolved in CH2Cl2,these two luminescence bands were also observed,although the low-energy band was blueshifted.For the crystalline Pt(II)complex,only the strong charge transfer band(lambda_(max)=618 nm)from the d* orbital of Pt resulted from excitation of the lone-pair electron of S.