作者: Guilford Jones , Valentine I. Vullev
DOI: 10.1021/JP010087Q
关键词:
摘要: The aggregation properties of 4-(1-pyrene)butanoate in aqueous media have been quantitatively investigated. For the pyrene chromophore ground state, monomer−dimer equilibrium was monitored using NMR methods, yielding a dimerization constant 150 M-1 for pyrenebutanoate alkaline water. In addition, excited-state studied by time-resolved emission spectroscopy. excimer formation water, which represents established interaction excited- and ground-state species, determined to be 1.6 × 104 (about 100-fold larger than constant). role solvent polarity influence an aromatic cosolvent were examined order determine types interactions that contribute driving force aggregation. propensity significantly diminished upon addition methanol or pyridine solutions, indicating hydrophobic and/or π-stacking inter...