Dynamic Role of the Intramolecular Hydrogen Bonding in the S1 State Relaxation Dynamics Revealed by the Direct Measurement of the Mode-Dependent Internal Conversion Rate of 2-Chlorophenol and 2-Chlorothiophenol
Junggil Kim,
Kyung Chul Woo,
Minseok Kang
et al.
Abstract:The dynamic role of the intramolecular hydrogen bond in the S 1 relaxation of cis-2-chlorophenol (2-CP) or cis-2-chlorothiophenol (2-CTP) has been investigated in a state-specific manner. Whereas ultrafast internal conversion is dominant for 2-CP, the H-tunneling competes with internal conversion for 2-CTP even at the S 1 origin. The S 0 − S 1 internal conversion rate of 2-CTP could be directly measured from the S 1 lifetimes of 2-CTP-d 1 (Cl-C 6 H 4 -SD) as the D-tunneling is kinetically blocked, allowing dis… Show more
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