Cyclometallation solvent effects

The luminescent cyclometalated complex [Pt(C4ANAN)py]+ 39 immobilized in Nafion film has been observed to exhibit a solvatochromic shift in emission maximum from 530 to 650 nm upon immersion in ethanol but no effect was detected with aprotic organic solvents (Fig. 19) [41]. On the contrary, the emission of the [Pt(C4ANAN)]+ luminophore anchored on silica materials (MCM-41/-48 and silica gel) showed a blue shift from Tmax 665 to 550 nm upon exposure to pentane vapor but no shift was observed for ethanol vapor (Fig. 20). 

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