Seung Ryul Choi

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Chemical exchange two-dimensional infrared (2DIR) spectroscopy is applied to investigate ion pairing dynamics occurring on picosecond timescales. SeCN(-) ion is used as a vibrational probe. The SeCN(-) ion dissolved in N,N-dimethyl formamide (DMF) has a sufficiently long vibrational lifetime and can form a contact ion pair with Li(+) ion in DMF. The CN(More)
The lateral buds of non-branching chrysanthemum cultivars are affected by temperature and exogenous plant growth regulator (PGR) treatment. The number of axillary buds, endogenous indole-3-acetic acid (IAA) and t-zeatin riboside (t-ZR) concentrations by planting date and PGR treatments were investigated in three genotypes. Two non-branching genotypes,(More)
An aspatial version for the famous Schelling’s segregation model has recently been proposed, which, called two-room model, is still in an agent-based format like the original Schelling model. In the present study, we propose a new, state equation version of the Schelling model. The new equation is based on the two-room model and is derived in terms of a set(More)
Spectroscopic properties (i.e., peak positions and widths) of vibrational probes are sensitively dependent on their local environments in liquids. Such spectroscopic sensitivities can be utilized for studying the structures and dynamics of a variety of molecular systems. Here, we have studied the ion pairing equilibrium and dynamics of SeCN(-) ion pairs(More)
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