Solvent Effects on the ion-pair dynamics of Charge-Transfer complex where bipheny1(derivative) is a doner

다국어 초록 (Multilingual Abstract)

Charge-Transfer Complex has a structure similar to that of the transition state in Solvolysis reaction, thus any information on the charge-transfer Complex and charge transfer reactions is important in organic chemistry. The importance of electron transfer is not limited to organic chemistry, but extends to a wide variety of chemical and biological systems, Biphenyl is frequently used as electron donor in the quenching experiment, and it readily forms a Charge-Transfer Complex with TCNB(tetra cyano benzene) in common organic solvents such as dichloromethane, aceton, and acetonitrile. In our study, Charge-Transfer complexes between TCNB and biphenyl(derivatives) have been investigated indifferent solvents using picosecond laser spectroscopy, Optical excitation of the ground-state charge-transfer complex with picosecond laser pulse generates contact ion pair(CIP) within the time resolution of the experiment. Direct monitoring of the transient absorption of biphenyl(derivative) cation makes possible the investigation of the dynamics of electron back-transfer and ion-pair separation. The variation in ion-pair dynamics with changes in solvent is discussed in terms of the CIP structure, the exoergicity of the reactions, and the thermodynamic driving force.

목차 (Table of Contents)

• Ⅰ. Introduction
• Ⅱ. Experimental
• Ⅲ. Results
• Ⅳ. Discussion
• Acknowledgment