Synthesis, characterization, thermal and luminescent properties of thiophenol-functionalized platinum(II) bis(acetylide) complexes

摘要

Two thiophenol-functionalized trans-platinum(II) bis(acetylide) complexes, having one thiophenol moiety in each alkenyl backbone with general formula trans-[(PPh3)(2)Pt{CC-Ar-CH=CH(SC6H5)}(2)], (2a-2b), (Ar=phenylene or 2,5-dimethylphenylene), were synthesized in good yields and good regioselectivities. Compared to the absorption bands of the trans-platinum(II) bis(acetylide) complexes 1, the positions of the lowest energy absorption bands were redshifted by 17-18nm, after functionalization with thiophenol. For both of the platinum(II) complexes 2, the lowest energy absorption bands in chloroform solution at room temperature were observed in the range 376-379nm, and under excitation at the absorption maximum both complexes showed emission maxima in the range of 408-419nm. All the new Pt complexes have been characterized by physico-chemical and spectroscopic methods.