Thio-Mayan-like Compounds: Excited State Characterization of Indigo Sulfur Derivatives in Solution and Incorporated in Palygorskite and Sepiolite Clays
作者： Raquel Rondão , J. Sérgio Seixas de Melo
DOI: 10.1021/JP306209Y
关键词:
摘要: Following what may mirror the recipe used by ancient Maya civilization, consisting of a mixture indigo and palygorskite, leading to organic/inorganic pigment known as Blue, we have switched with thioindigo (TI) derivative (Ciba Brilliant Pink, CBP) synthesized was Christianized “Maya Pink”. The spectral photophysical behavior TI CBP investigated in solution solid state (in powder incorporated palygorskite clays). In solution, different organic solvents (benzene, toluene, dioxane) at room low temperatures further compared indigo. displays when indigo: fluorescence dominating deactivation first excited singlet (50–70% depending on solvent), S1〰→S0 internal conversion S1〰→T1 intersystem crossing channels representing remaining quanta loss. Moreover, whereas case prot...
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