Pyrene-Terminated Tin Sulfide Clusters: Optical Properties and Deposition on a Metal Surface

Herein, we present the synthesis of two pyrene-functionalized clusters, (R^pyrSn)₄S₆]?2 CH₂Cl₂ ( 4 ) and (R^pyrSn)₄Sn₂S₁₀]?n CH₂Cl₂ (n=4, 5 a ; n=2, 5 b ; R^pyr=CMe₂CH₂C(Me)N-NC(H)C₁₆H₉), both of which form in reactions of the organotin sulfide cluster (R^NSn)₄S₆] ( C ; R^N=CMe₂CH₂C(Me)N-NH₂) with the well-known fluorescent dye 1-pyrenecarboxaldehyde ( B ). In contrast, reactions using an organotin sulfide cluster with another core structure, (R^NSn)₃S₄Cl] ( A ), leads to formation of small molecular fragments, (R^pyrCl₂Sn)₂S] ( 1 ), (pyren-1-ylmethylene)hydrazine ( 2 ), and 1,2-bis(pyren-1-ylmethylene)hydrazine ( 3 ). Besides synthesis and structures of the new compounds, we report the influence of the inorganic core on the optical properties of the dye, which was analyzed exemplarily for compound 5 a via absorption and fluorescence spectroscopy. This cluster was also used for exploring the potential of such non-volatile clusters for deposition on a metal surface under vacuum conditions.