Cuprophilic interactions

As consequence of this cuprophilic interaction, desolvated polymer 4T shows photoluminescence behavior. The authors attribute the observation of bright yellow emission at 420 nm after excitation at 320 nm to an CC-excited state with mixed XMCT character the term solvato-photoluminescence was coined for the off on behavior caused by the 41 —>4T transformation.161... 

Upon irradiation at 380 nm, ligand Ge(CH2SPh)4 exhibits an emission with a maximum at 440 nm in the solid state at 298 K (Fig. 56). A structureless emission is also observed in the solid state at 77 K, which is not shifted. When 1.49 is excited at 260 nm in dichloromethane at room temperature, the emission maximum appears at 333 nm. The emissions recorded for the polymer 49 in the solid state at 298 K exhibit a pattern very similar to that of the ligand. We conclude that due to the absence of strong cuprophilic interactions in polymer 49, the emission is essentially centered on the ligand. 

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