Deeper insight into the multifaceted photodynamics of a potential organic functional material emphasizing aggregation induced emission enhancement (AIEE) properties
作者： Tapashree Mondal , Swapnadip Roy , Indranil Mondal , Manoj V. Mane , Sujit S. Panja
DOI: 10.1016/J.JPHOTOCHEM.2020.112998
关键词:
摘要: Abstract The multifaceted photodynamics of a simple azine based organic functional molecule namely 2-((Z)-((E)-(pyren-1-ylmethylene)hydrazono)methyl)quinolin-8-ol (PHQ) emphasizing its brilliant fluorescence emission redemption properties in aggregation state (AIEE) have been primarily explored through absorption and steady techniques. governing role photo-induced electron transfer (PET) rates active intramolecular motions non-interacting PHQ monomers at lower water fraction comprising mixed solvent systems identified to be the prime reasons for non-radiative annihilation photoexcited states. transition from weakly emissive highly has substantiated elaborate study using time-resolved photoluminescence (TRPL), quantum yield variation external control experiments. In current study, increased rotational relaxation time aggregated hydrosol, responsible AIEE, is investigated anisotropy measurement (TRAM) different microenvironments, which unprecedented best our knowledge AIEE research. Interestingly, high-angle annular dark field-scanning transmission microscopy (HAADF-STEM) image shows one dimensionally grown molecular entity single nano-sheet like structure PHQ, unique observation. average particle size aggregates also 84.5 nm 814 nm corresponding 10% 90% fw (water volume %) system respectively. energy-dispersive X-ray spectroscopy (EDX) employed, first research, reveals gradual increase amount carbon within microstructure with addition water. present being rotor system, provides future prospect probing local microenvironmental viscosities biological systems.
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