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Conclusions
We describe a convenient method for the preparation of novel
phenothiazine derivatives with special optical features under
alkaline environment. Most of these PTZ derivatives products
exhibit red emission fluorescence in alkaline DMSO solution
when exciting their visible absorption wavelength. Furthermore,
anionic PTZ-OH showed NIR absorptive energy in DMSO
solution due to the formation of a hybrid form and green emis-
sion in aqueous solution due to the FONs construction, respec-
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8658 | J. Mater. Chem., 2010, 20, 8653–8658
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