Synthesis,Crystal Structure and Luminescent Mechanochromism of a Square-planar Pt(Ⅱ) Complex Based on 1,10-Phenanthroline Derivative

A new square-planar platinum（Ⅱ） complex, [Pt（Me3SiC≡Cphen）(C≡CC6H4Cl-3)2]（1）, was synthesized by using 3-trimethylsilylethynyl-1,10-phenanthroline（Me3SiC≡Cphen） and 3-chlorophenylacetylene ligands, and its structure was characterized by single-crystal X-ray crystallography. 1 crystallizes in triclinic, space group P1 with a = 6.9524（5）, b = 12.7796（11）, c = 17.5846（10） ?, α = 78.484（5）, β = 88.700（5）, γ = 75.600（6）°, V = 1482.23（19） ?3, Z = 2, C33H24Cl2N2 PtSi, Mr = 742.62, Dc = 1.664 g/cm3, F（000） = 724, μ（Mo Ka） = 4.979 mm-1, R = 0.0369 and wR = 0.0786. In 1, adjacent molecules along the a axis are stacked in a columnar structure through π···π interactions, and such neighboring columnar structures are connected with each other by C–H···π hydrogen bonds to form a 2D supramolecular network. 1 exhibits reversible luminescence mechanochromic property with the luminescence red shift in a range of ca. 146～182 nm. Extremely large red-shifts of luminescence spectra suggest that luminescent mechanochromic property of 1 is due to the formation of aggregate via Pt–Pt interaction during the mechanical grinding. Based on this property, a simple device was developed and used for rewritable data storage.